146][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.249156][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.249166][ T50] kobject_add_internal+0x290/0x6f0 [ 40.249174][ T50] kobject_add_varg+0x9c/0xe8 [ 40.249181][ T50] kobject_add+0x110/0x1c8 [ 40.249188][ T50] device_add+0x394/0x9e0 [ 40.249195][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.249204][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.249212][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.249220][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.249229][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.249238][ T50] hci_rx_work+0x2f4/0xd78 [ 40.249245][ T50] process_scheduled_works+0x788/0x10b8 [ 40.249254][ T50] worker_thread+0x798/0xbd0 [ 40.249262][ T50] kthread+0x304/0x3d4 [ 40.249269][ T50] ret_from_fork+0x10/0x20 [ 40.249282][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.249293][ T50] Bluetooth: hci0: failed to register connection device [ 40.262228][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.262242][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.262252][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.262256][ T50] Workqueue: hci0 hci_rx_work [ 40.262269][ T50] Call trace: [ 40.262272][ T50] show_stack+0x2c/0x3c (C) [ 40.262285][ T50] __dump_stack+0x30/0x40 [ 40.262295][ T50] dump_stack_lvl+0xd8/0x12c [ 40.262305][ T50] dump_stack+0x1c/0x28 [ 40.262314][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.262324][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.262334][ T50] kobject_add_internal+0x290/0x6f0 [ 40.262343][ T50] kobject_add_varg+0x9c/0xe8 [ 40.262350][ T50] kobject_add+0x110/0x1c8 [ 40.262356][ T50] device_add+0x394/0x9e0 [ 40.262364][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.262373][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.262382][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.262390][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.262399][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.262407][ T50] hci_rx_work+0x2f4/0xd78 [ 40.262414][ T50] process_scheduled_works+0x788/0x10b8 [ 40.262423][ T50] worker_thread+0x798/0xbd0 [ 40.262431][ T50] kthread+0x304/0x3d4 [ 40.262439][ T50] ret_from_fork+0x10/0x20 [ 40.262451][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.262463][ T50] Bluetooth: hci0: failed to register connection device [ 40.268416][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.268427][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.268437][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.268441][ T50] Workqueue: hci0 hci_rx_work [ 40.268452][ T50] Call trace: [ 40.268455][ T50] show_stack+0x2c/0x3c (C) [ 40.268467][ T50] __dump_stack+0x30/0x40 [ 40.268477][ T50] dump_stack_lvl+0xd8/0x12c [ 40.268487][ T50] dump_stack+0x1c/0x28 [ 40.268496][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.268505][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.268515][ T50] kobject_add_internal+0x290/0x6f0 [ 40.268523][ T50] kobject_add_varg+0x9c/0xe8 [ 40.268530][ T50] kobject_add+0x110/0x1c8 [ 40.268537][ T50] device_add+0x394/0x9e0 [ 40.268544][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.268553][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.268561][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.268569][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.268578][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.268586][ T50] hci_rx_work+0x2f4/0xd78 [ 40.268593][ T50] process_scheduled_works+0x788/0x10b8 [ 40.268602][ T50] worker_thread+0x798/0xbd0 [ 40.268610][ T50] kthread+0x304/0x3d4 [ 40.268617][ T50] ret_from_fork+0x10/0x20 [ 40.268629][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.268641][ T50] Bluetooth: hci0: failed to register connection device [ 40.276774][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.276785][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.276794][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.276799][ T50] Workqueue: hci0 hci_rx_work [ 40.276810][ T50] Call trace: [ 40.276812][ T50] show_stack+0x2c/0x3c (C) [ 40.276825][ T50] __dump_stack+0x30/0x40 [ 40.276835][ T50] dump_stack_lvl+0xd8/0x12c [ 40.276845][ T50] dump_stack+0x1c/0x28 [ 40.276854][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.276864][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.276874][ T50] kobject_add_internal+0x290/0x6f0 [ 40.276882][ T50] kobject_add_varg+0x9c/0xe8 [ 40.276889][ T50] kobject_add+0x110/0x1c8 [ 40.276896][ T50] device_add+0x394/0x9e0 [ 40.276903][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.276912][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.276922][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.276930][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.276940][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.276948][ T50] hci_rx_work+0x2f4/0xd78 [ 40.276955][ T50] process_scheduled_works+0x788/0x10b8 [ 40.276964][ T50] worker_thread+0x798/0xbd0 [ 40.276973][ T50] kthread+0x304/0x3d4 [ 40.276980][ T50] ret_from_fork+0x10/0x20 [ 40.276992][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.277003][ T50] Bluetooth: hci0: failed to register connection device [ 40.288441][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.288453][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.288463][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.288468][ T50] Workqueue: hci0 hci_rx_work [ 40.288480][ T50] Call trace: [ 40.288483][ T50] show_stack+0x2c/0x3c (C) [ 40.288496][ T50] __dump_stack+0x30/0x40 [ 40.288506][ T50] dump_stack_lvl+0xd8/0x12c [ 40.288516][ T50] dump_stack+0x1c/0x28 [ 40.288525][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.288535][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.288544][ T50] kobject_add_internal+0x290/0x6f0 [ 40.288553][ T50] kobject_add_varg+0x9c/0xe8 [ 40.288560][ T50] kobject_add+0x110/0x1c8 [ 40.288567][ T50] device_add+0x394/0x9e0 [ 40.288574][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.288583][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.288592][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.288600][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.288609][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.288617][ T50] hci_rx_work+0x2f4/0xd78 [ 40.288624][ T50] process_scheduled_works+0x788/0x10b8 [ 40.288633][ T50] worker_thread+0x798/0xbd0 [ 40.288641][ T50] kthread+0x304/0x3d4 [ 40.288649][ T50] ret_from_fork+0x10/0x20 [ 40.288661][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.288672][ T50] Bluetooth: hci0: failed to register connection device [ 40.295936][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.295947][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.295957][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.295961][ T50] Workqueue: hci0 hci_rx_work [ 40.295972][ T50] Call trace: [ 40.295974][ T50] show_stack+0x2c/0x3c (C) [ 40.295987][ T50] __dump_stack+0x30/0x40 [ 40.295997][ T50] dump_stack_lvl+0xd8/0x12c [ 40.296006][ T50] dump_stack+0x1c/0x28 [ 40.296015][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.296025][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.296034][ T50] kobject_add_internal+0x290/0x6f0 [ 40.296042][ T50] kobject_add_varg+0x9c/0xe8 [ 40.296049][ T50] kobject_add+0x110/0x1c8 [ 40.296056][ T50] device_add+0x394/0x9e0 [ 40.296063][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.296073][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.296081][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.296089][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.296098][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.296106][ T50] hci_rx_work+0x2f4/0xd78 [ 40.296122][ T50] process_scheduled_works+0x788/0x10b8 [ 40.296132][ T50] worker_thread+0x798/0xbd0 [ 40.296140][ T50] kthread+0x304/0x3d4 [ 40.296148][ T50] ret_from_fork+0x10/0x20 [ 40.296163][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.296174][ T50] Bluetooth: hci0: failed to register connection device [ 40.308727][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.308739][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.308749][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.308754][ T50] Workqueue: hci0 hci_rx_work [ 40.308766][ T50] Call trace: [ 40.308769][ T50] show_stack+0x2c/0x3c (C) [ 40.308782][ T50] __dump_stack+0x30/0x40 [ 40.308792][ T50] dump_stack_lvl+0xd8/0x12c [ 40.308802][ T50] dump_stack+0x1c/0x28 [ 40.308811][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.308822][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.308831][ T50] kobject_add_internal+0x290/0x6f0 [ 40.308840][ T50] kobject_add_varg+0x9c/0xe8 [ 40.308847][ T50] kobject_add+0x110/0x1c8 [ 40.308853][ T50] device_add+0x394/0x9e0 [ 40.308861][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.308870][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.308878][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.308886][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.308895][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.308904][ T50] hci_rx_work+0x2f4/0xd78 [ 40.308910][ T50] process_scheduled_works+0x788/0x10b8 [ 40.308920][ T50] worker_thread+0x798/0xbd0 [ 40.308928][ T50] kthread+0x304/0x3d4 [ 40.308936][ T50] ret_from_fork+0x10/0x20 [ 40.308947][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.308959][ T50] Bluetooth: hci0: failed to register connection device [ 40.316672][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.316682][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.316692][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.316697][ T50] Workqueue: hci0 hci_rx_work [ 40.316707][ T50] Call trace: [ 40.316710][ T50] show_stack+0x2c/0x3c (C) [ 40.316723][ T50] __dump_stack+0x30/0x40 [ 40.316733][ T50] dump_stack_lvl+0xd8/0x12c [ 40.316743][ T50] dump_stack+0x1c/0x28 [ 40.316752][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.316762][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.316772][ T50] kobject_add_internal+0x290/0x6f0 [ 40.316780][ T50] kobject_add_varg+0x9c/0xe8 [ 40.316787][ T50] kobject_add+0x110/0x1c8 [ 40.316794][ T50] device_add+0x394/0x9e0 [ 40.316801][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.316810][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.316819][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.316827][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.316836][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.316845][ T50] hci_rx_work+0x2f4/0xd78 [ 40.316851][ T50] process_scheduled_works+0x788/0x10b8 [ 40.316861][ T50] worker_thread+0x798/0xbd0 [ 40.316869][ T50] kthread+0x304/0x3d4 [ 40.316876][ T50] ret_from_fork+0x10/0x20 [ 40.316888][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.316900][ T50] Bluetooth: hci0: failed to register connection device [ 40.325584][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.325595][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.325605][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.325610][ T50] Workqueue: hci0 hci_rx_work [ 40.325621][ T50] Call trace: [ 40.325623][ T50] show_stack+0x2c/0x3c (C) [ 40.325637][ T50] __dump_stack+0x30/0x40 [ 40.325647][ T50] dump_stack_lvl+0xd8/0x12c [ 40.325656][ T50] dump_stack+0x1c/0x28 [ 40.325665][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.325675][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.325685][ T50] kobject_add_internal+0x290/0x6f0 [ 40.325693][ T50] kobject_add_varg+0x9c/0xe8 [ 40.325700][ T50] kobject_add+0x110/0x1c8 [ 40.325707][ T50] device_add+0x394/0x9e0 [ 40.325714][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.325723][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.325731][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.325739][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.325748][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.325757][ T50] hci_rx_work+0x2f4/0xd78 [ 40.325763][ T50] process_scheduled_works+0x788/0x10b8 [ 40.325772][ T50] worker_thread+0x798/0xbd0 [ 40.325781][ T50] kthread+0x304/0x3d4 [ 40.325788][ T50] ret_from_fork+0x10/0x20 [ 40.325800][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.325811][ T50] Bluetooth: hci0: failed to register connection device [ 40.334392][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.334403][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.334413][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.334417][ T50] Workqueue: hci0 hci_rx_work [ 40.334428][ T50] Call trace: [ 40.334431][ T50] show_stack+0x2c/0x3c (C) [ 40.334443][ T50] __dump_stack+0x30/0x40 [ 40.334453][ T50] dump_stack_lvl+0xd8/0x12c [ 40.334463][ T50] dump_stack+0x1c/0x28 [ 40.334472][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.334482][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.334492][ T50] kobject_add_internal+0x290/0x6f0 [ 40.334500][ T50] kobject_add_varg+0x9c/0xe8 [ 40.334507][ T50] kobject_add+0x110/0x1c8 [ 40.334514][ T50] device_add+0x394/0x9e0 [ 40.334521][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.334531][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.334539][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.334547][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.334556][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.334564][ T50] hci_rx_work+0x2f4/0xd78 [ 40.334571][ T50] process_scheduled_works+0x788/0x10b8 [ 40.334580][ T50] worker_thread+0x798/0xbd0 [ 40.334588][ T50] kthread+0x304/0x3d4 [ 40.334595][ T50] ret_from_fork+0x10/0x20 [ 40.334607][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.334619][ T50] Bluetooth: hci0: failed to register connection device [ 40.345725][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.345737][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.345747][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.345752][ T50] Workqueue: hci0 hci_rx_work [ 40.345764][ T50] Call trace: [ 40.345767][ T50] show_stack+0x2c/0x3c (C) [ 40.345780][ T50] __dump_stack+0x30/0x40 [ 40.345790][ T50] dump_stack_lvl+0xd8/0x12c [ 40.345800][ T50] dump_stack+0x1c/0x28 [ 40.345809][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.345820][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.345829][ T50] kobject_add_internal+0x290/0x6f0 [ 40.345837][ T50] kobject_add_varg+0x9c/0xe8 [ 40.345844][ T50] kobject_add+0x110/0x1c8 [ 40.345851][ T50] device_add+0x394/0x9e0 [ 40.345859][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.345868][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.345876][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.345884][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.345893][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.345901][ T50] hci_rx_work+0x2f4/0xd78 [ 40.345908][ T50] process_scheduled_works+0x788/0x10b8 [ 40.345917][ T50] worker_thread+0x798/0xbd0 [ 40.345926][ T50] kthread+0x304/0x3d4 [ 40.345933][ T50] ret_from_fork+0x10/0x20 [ 40.345946][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.345958][ T50] Bluetooth: hci0: failed to register connection device [ 40.353512][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.353523][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.353533][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.353537][ T50] Workqueue: hci0 hci_rx_work [ 40.353548][ T50] Call trace: [ 40.353551][ T50] show_stack+0x2c/0x3c (C) [ 40.353563][ T50] __dump_stack+0x30/0x40 [ 40.353574][ T50] dump_stack_lvl+0xd8/0x12c [ 40.353583][ T50] dump_stack+0x1c/0x28 [ 40.353593][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.353603][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.353612][ T50] kobject_add_internal+0x290/0x6f0 [ 40.353620][ T50] kobject_add_varg+0x9c/0xe8 [ 40.353627][ T50] kobject_add+0x110/0x1c8 [ 40.353634][ T50] device_add+0x394/0x9e0 [ 40.353641][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.353650][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.353659][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.353667][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.353676][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.353684][ T50] hci_rx_work+0x2f4/0xd78 [ 40.353691][ T50] process_scheduled_works+0x788/0x10b8 [ 40.353700][ T50] worker_thread+0x798/0xbd0 [ 40.353708][ T50] kthread+0x304/0x3d4 [ 40.353716][ T50] ret_from_fork+0x10/0x20 [ 40.353728][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.353739][ T50] Bluetooth: hci0: failed to register connection device [ 40.359922][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.359932][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.359943][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.359948][ T50] Workqueue: hci0 hci_rx_work [ 40.359959][ T50] Call trace: [ 40.359962][ T50] show_stack+0x2c/0x3c (C) [ 40.359974][ T50] __dump_stack+0x30/0x40 [ 40.359985][ T50] dump_stack_lvl+0xd8/0x12c [ 40.359994][ T50] dump_stack+0x1c/0x28 [ 40.360004][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.360013][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.360023][ T50] kobject_add_internal+0x290/0x6f0 [ 40.360031][ T50] kobject_add_varg+0x9c/0xe8 [ 40.360038][ T50] kobject_add+0x110/0x1c8 [ 40.360045][ T50] device_add+0x394/0x9e0 [ 40.360052][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.360061][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.360069][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.360078][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.360091][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.360100][ T50] hci_rx_work+0x2f4/0xd78 [ 40.360113][ T50] process_scheduled_works+0x788/0x10b8 [ 40.360122][ T50] worker_thread+0x798/0xbd0 [ 40.360131][ T50] kthread+0x304/0x3d4 [ 40.360138][ T50] ret_from_fork+0x10/0x20 [ 40.361194][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.361207][ T50] Bluetooth: hci0: failed to register connection device [ 40.371105][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.371126][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.371138][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.371144][ T50] Workqueue: hci0 hci_rx_work [ 40.371158][ T50] Call trace: [ 40.371162][ T50] show_stack+0x2c/0x3c (C) [ 40.371176][ T50] __dump_stack+0x30/0x40 [ 40.371188][ T50] dump_stack_lvl+0xd8/0x12c [ 40.371198][ T50] dump_stack+0x1c/0x28 [ 40.371207][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.371218][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.371227][ T50] kobject_add_internal+0x290/0x6f0 [ 40.371236][ T50] kobject_add_varg+0x9c/0xe8 [ 40.371243][ T50] kobject_add+0x110/0x1c8 [ 40.371249][ T50] device_add+0x394/0x9e0 [ 40.371257][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.371267][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.371275][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.371283][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.371292][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.371301][ T50] hci_rx_work+0x2f4/0xd78 [ 40.371307][ T50] process_scheduled_works+0x788/0x10b8 [ 40.371316][ T50] worker_thread+0x798/0xbd0 [ 40.371325][ T50] kthread+0x304/0x3d4 [ 40.371332][ T50] ret_from_fork+0x10/0x20 [ 40.371344][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.371356][ T50] Bluetooth: hci0: failed to register connection device [ 40.376991][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.377001][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.377011][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.377015][ T50] Workqueue: hci0 hci_rx_work [ 40.377025][ T50] Call trace: [ 40.377028][ T50] show_stack+0x2c/0x3c (C) [ 40.377040][ T50] __dump_stack+0x30/0x40 [ 40.377050][ T50] dump_stack_lvl+0xd8/0x12c [ 40.377060][ T50] dump_stack+0x1c/0x28 [ 40.377069][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.377079][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.377088][ T50] kobject_add_internal+0x290/0x6f0 [ 40.377096][ T50] kobject_add_varg+0x9c/0xe8 [ 40.377103][ T50] kobject_add+0x110/0x1c8 [ 40.377117][ T50] device_add+0x394/0x9e0 [ 40.377125][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.377134][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.377143][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.377151][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.377160][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.377169][ T50] hci_rx_work+0x2f4/0xd78 [ 40.377175][ T50] process_scheduled_works+0x788/0x10b8 [ 40.377184][ T50] worker_thread+0x798/0xbd0 [ 40.377193][ T50] kthread+0x304/0x3d4 [ 40.377200][ T50] ret_from_fork+0x10/0x20 [ 40.377212][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.377223][ T50] Bluetooth: hci0: failed to register connection device [ 40.385608][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.385619][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.385629][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.385634][ T50] Workqueue: hci0 hci_rx_work [ 40.385645][ T50] Call trace: [ 40.385648][ T50] show_stack+0x2c/0x3c (C) [ 40.385661][ T50] __dump_stack+0x30/0x40 [ 40.385671][ T50] dump_stack_lvl+0xd8/0x12c [ 40.385681][ T50] dump_stack+0x1c/0x28 [ 40.385690][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.385700][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.385709][ T50] kobject_add_internal+0x290/0x6f0 [ 40.385718][ T50] kobject_add_varg+0x9c/0xe8 [ 40.385725][ T50] kobject_add+0x110/0x1c8 [ 40.385731][ T50] device_add+0x394/0x9e0 [ 40.385739][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.385748][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.385756][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.385764][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.385773][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.385782][ T50] hci_rx_work+0x2f4/0xd78 [ 40.385788][ T50] process_scheduled_works+0x788/0x10b8 [ 40.385797][ T50] worker_thread+0x798/0xbd0 [ 40.385806][ T50] kthread+0x304/0x3d4 [ 40.385813][ T50] ret_from_fork+0x10/0x20 [ 40.385825][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.385836][ T50] Bluetooth: hci0: failed to register connection device [ 40.395990][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.396001][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.396011][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.396016][ T50] Workqueue: hci0 hci_rx_work [ 40.396029][ T50] Call trace: [ 40.396031][ T50] show_stack+0x2c/0x3c (C) [ 40.396044][ T50] __dump_stack+0x30/0x40 [ 40.396055][ T50] dump_stack_lvl+0xd8/0x12c [ 40.396064][ T50] dump_stack+0x1c/0x28 [ 40.396074][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.396084][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.396093][ T50] kobject_add_internal+0x290/0x6f0 [ 40.396102][ T50] kobject_add_varg+0x9c/0xe8 [ 40.396115][ T50] kobject_add+0x110/0x1c8 [ 40.396122][ T50] device_add+0x394/0x9e0 [ 40.396130][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.396140][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.396148][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.396157][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.396166][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.396174][ T50] hci_rx_work+0x2f4/0xd78 [ 40.396181][ T50] process_scheduled_works+0x788/0x10b8 [ 40.396190][ T50] worker_thread+0x798/0xbd0 [ 40.396198][ T50] kthread+0x304/0x3d4 [ 40.396206][ T50] ret_from_fork+0x10/0x20 [ 40.396218][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.396232][ T50] Bluetooth: hci0: failed to register connection device [ 40.404439][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.404449][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.404459][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.404464][ T50] Workqueue: hci0 hci_rx_work [ 40.404476][ T50] Call trace: [ 40.404478][ T50] show_stack+0x2c/0x3c (C) [ 40.404492][ T50] __dump_stack+0x30/0x40 [ 40.404502][ T50] dump_stack_lvl+0xd8/0x12c [ 40.404512][ T50] dump_stack+0x1c/0x28 [ 40.404521][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.404531][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.404540][ T50] kobject_add_internal+0x290/0x6f0 [ 40.404549][ T50] kobject_add_varg+0x9c/0xe8 [ 40.404556][ T50] kobject_add+0x110/0x1c8 [ 40.404562][ T50] device_add+0x394/0x9e0 [ 40.404569][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.404578][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.404587][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.404595][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.404604][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.404613][ T50] hci_rx_work+0x2f4/0xd78 [ 40.404619][ T50] process_scheduled_works+0x788/0x10b8 [ 40.404628][ T50] worker_thread+0x798/0xbd0 [ 40.404637][ T50] kthread+0x304/0x3d4 [ 40.404644][ T50] ret_from_fork+0x10/0x20 [ 40.404656][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.404667][ T50] Bluetooth: hci0: failed to register connection device [ 40.417221][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.417233][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.417242][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.417247][ T50] Workqueue: hci0 hci_rx_work [ 40.417260][ T50] Call trace: [ 40.417263][ T50] show_stack+0x2c/0x3c (C) [ 40.417276][ T50] __dump_stack+0x30/0x40 [ 40.417286][ T50] dump_stack_lvl+0xd8/0x12c [ 40.417296][ T50] dump_stack+0x1c/0x28 [ 40.417305][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.417316][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.417325][ T50] kobject_add_internal+0x290/0x6f0 [ 40.417333][ T50] kobject_add_varg+0x9c/0xe8 [ 40.417340][ T50] kobject_add+0x110/0x1c8 [ 40.417347][ T50] device_add+0x394/0x9e0 [ 40.417355][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.417364][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.417372][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.417381][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.417390][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.417398][ T50] hci_rx_work+0x2f4/0xd78 [ 40.417405][ T50] process_scheduled_works+0x788/0x10b8 [ 40.417414][ T50] worker_thread+0x798/0xbd0 [ 40.417422][ T50] kthread+0x304/0x3d4 [ 40.417430][ T50] ret_from_fork+0x10/0x20 [ 40.417443][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.417454][ T50] Bluetooth: hci0: failed to register connection device [ 40.425044][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.425054][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.425064][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.425069][ T50] Workqueue: hci0 hci_rx_work [ 40.425079][ T50] Call trace: [ 40.425082][ T50] show_stack+0x2c/0x3c (C) [ 40.425094][ T50] __dump_stack+0x30/0x40 [ 40.425104][ T50] dump_stack_lvl+0xd8/0x12c [ 40.425122][ T50] dump_stack+0x1c/0x28 [ 40.425132][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.425142][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.425152][ T50] kobject_add_internal+0x290/0x6f0 [ 40.425161][ T50] kobject_add_varg+0x9c/0xe8 [ 40.425168][ T50] kobject_add+0x110/0x1c8 [ 40.425175][ T50] device_add+0x394/0x9e0 [ 40.425182][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.425191][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.425200][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.425208][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.425217][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.425225][ T50] hci_rx_work+0x2f4/0xd78 [ 40.425232][ T50] process_scheduled_works+0x788/0x10b8 [ 40.425240][ T50] worker_thread+0x798/0xbd0 [ 40.425249][ T50] kthread+0x304/0x3d4 [ 40.425256][ T50] ret_from_fork+0x10/0x20 [ 40.425268][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.425279][ T50] Bluetooth: hci0: failed to register connection device [ 40.434877][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.434888][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.434897][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.434902][ T50] Workqueue: hci0 hci_rx_work [ 40.434913][ T50] Call trace: [ 40.434916][ T50] show_stack+0x2c/0x3c (C) [ 40.434929][ T50] __dump_stack+0x30/0x40 [ 40.434939][ T50] dump_stack_lvl+0xd8/0x12c [ 40.434948][ T50] dump_stack+0x1c/0x28 [ 40.434958][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.434967][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.434977][ T50] kobject_add_internal+0x290/0x6f0 [ 40.434985][ T50] kobject_add_varg+0x9c/0xe8 [ 40.434992][ T50] kobject_add+0x110/0x1c8 [ 40.434998][ T50] device_add+0x394/0x9e0 [ 40.435006][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.435015][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.435023][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.435031][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.435040][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.435049][ T50] hci_rx_work+0x2f4/0xd78 [ 40.435056][ T50] process_scheduled_works+0x788/0x10b8 [ 40.435065][ T50] worker_thread+0x798/0xbd0 [ 40.435073][ T50] kthread+0x304/0x3d4 [ 40.435080][ T50] ret_from_fork+0x10/0x20 [ 40.435093][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.435105][ T50] Bluetooth: hci0: failed to register connection device [ 40.443890][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.443902][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.443913][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.443919][ T50] Workqueue: hci0 hci_rx_work [ 40.443932][ T50] Call trace: [ 40.443935][ T50] show_stack+0x2c/0x3c (C) [ 40.443948][ T50] __dump_stack+0x30/0x40 [ 40.443959][ T50] dump_stack_lvl+0xd8/0x12c [ 40.443968][ T50] dump_stack+0x1c/0x28 [ 40.443977][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.443987][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.443997][ T50] kobject_add_internal+0x290/0x6f0 [ 40.444005][ T50] kobject_add_varg+0x9c/0xe8 [ 40.444012][ T50] kobject_add+0x110/0x1c8 [ 40.444019][ T50] device_add+0x394/0x9e0 [ 40.444026][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.444035][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.444044][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.444052][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.444061][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.444069][ T50] hci_rx_work+0x2f4/0xd78 [ 40.444076][ T50] process_scheduled_works+0x788/0x10b8 [ 40.444085][ T50] worker_thread+0x798/0xbd0 [ 40.444093][ T50] kthread+0x304/0x3d4 [ 40.444101][ T50] ret_from_fork+0x10/0x20 [ 40.444119][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.444135][ T50] Bluetooth: hci0: failed to register connection device [ 40.451541][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.451552][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.451561][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.451566][ T50] Workqueue: hci0 hci_rx_work [ 40.451577][ T50] Call trace: [ 40.451579][ T50] show_stack+0x2c/0x3c (C) [ 40.451592][ T50] __dump_stack+0x30/0x40 [ 40.451602][ T50] dump_stack_lvl+0xd8/0x12c [ 40.451611][ T50] dump_stack+0x1c/0x28 [ 40.451621][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.451630][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.451640][ T50] kobject_add_internal+0x290/0x6f0 [ 40.451648][ T50] kobject_add_varg+0x9c/0xe8 [ 40.451655][ T50] kobject_add+0x110/0x1c8 [ 40.451661][ T50] device_add+0x394/0x9e0 [ 40.451669][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.451678][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.451686][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.451694][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.451703][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.451712][ T50] hci_rx_work+0x2f4/0xd78 [ 40.451718][ T50] process_scheduled_works+0x788/0x10b8 [ 40.451727][ T50] worker_thread+0x798/0xbd0 [ 40.451735][ T50] kthread+0x304/0x3d4 [ 40.451743][ T50] ret_from_fork+0x10/0x20 [ 40.451755][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.451766][ T50] Bluetooth: hci0: failed to register connection device [ 40.461425][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.461436][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.461446][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.461451][ T50] Workqueue: hci0 hci_rx_work [ 40.461462][ T50] Call trace: [ 40.461465][ T50] show_stack+0x2c/0x3c (C) [ 40.461477][ T50] __dump_stack+0x30/0x40 [ 40.461487][ T50] dump_stack_lvl+0xd8/0x12c [ 40.461497][ T50] dump_stack+0x1c/0x28 [ 40.461506][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.461516][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.461525][ T50] kobject_add_internal+0x290/0x6f0 [ 40.461533][ T50] kobject_add_varg+0x9c/0xe8 [ 40.461540][ T50] kobject_add+0x110/0x1c8 [ 40.461547][ T50] device_add+0x394/0x9e0 [ 40.461554][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.461564][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.461572][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.461580][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.461589][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.461598][ T50] hci_rx_work+0x2f4/0xd78 [ 40.461604][ T50] process_scheduled_works+0x788/0x10b8 [ 40.461613][ T50] worker_thread+0x798/0xbd0 [ 40.461622][ T50] kthread+0x304/0x3d4 [ 40.461629][ T50] ret_from_fork+0x10/0x20 [ 40.461641][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.461653][ T50] Bluetooth: hci0: failed to register connection device [ 40.467285][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.467294][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.467304][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.467309][ T50] Workqueue: hci0 hci_rx_work [ 40.467319][ T50] Call trace: [ 40.467321][ T50] show_stack+0x2c/0x3c (C) [ 40.467333][ T50] __dump_stack+0x30/0x40 [ 40.467343][ T50] dump_stack_lvl+0xd8/0x12c [ 40.467353][ T50] dump_stack+0x1c/0x28 [ 40.467363][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.467372][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.467381][ T50] kobject_add_internal+0x290/0x6f0 [ 40.467390][ T50] kobject_add_varg+0x9c/0xe8 [ 40.467397][ T50] kobject_add+0x110/0x1c8 [ 40.467403][ T50] device_add+0x394/0x9e0 [ 40.467410][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.467420][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.467428][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.467436][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.467445][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.467454][ T50] hci_rx_work+0x2f4/0xd78 [ 40.467460][ T50] process_scheduled_works+0x788/0x10b8 [ 40.467469][ T50] worker_thread+0x798/0xbd0 [ 40.467478][ T50] kthread+0x304/0x3d4 [ 40.467485][ T50] ret_from_fork+0x10/0x20 [ 40.467497][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.467508][ T50] Bluetooth: hci0: failed to register connection device [ 40.477766][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.477778][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.477788][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.477793][ T50] Workqueue: hci0 hci_rx_work [ 40.477805][ T50] Call trace: [ 40.477808][ T50] show_stack+0x2c/0x3c (C) [ 40.477821][ T50] __dump_stack+0x30/0x40 [ 40.477831][ T50] dump_stack_lvl+0xd8/0x12c [ 40.477841][ T50] dump_stack+0x1c/0x28 [ 40.477850][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.477861][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.477870][ T50] kobject_add_internal+0x290/0x6f0 [ 40.477878][ T50] kobject_add_varg+0x9c/0xe8 [ 40.477885][ T50] kobject_add+0x110/0x1c8 [ 40.477892][ T50] device_add+0x394/0x9e0 [ 40.477899][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.477909][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.477917][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.477925][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.477934][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.477943][ T50] hci_rx_work+0x2f4/0xd78 [ 40.477950][ T50] process_scheduled_works+0x788/0x10b8 [ 40.477959][ T50] worker_thread+0x798/0xbd0 [ 40.477968][ T50] kthread+0x304/0x3d4 [ 40.477975][ T50] ret_from_fork+0x10/0x20 [ 40.477987][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.477999][ T50] Bluetooth: hci0: failed to register connection device [ 40.485571][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.485582][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.485591][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.485596][ T50] Workqueue: hci0 hci_rx_work [ 40.485607][ T50] Call trace: [ 40.485610][ T50] show_stack+0x2c/0x3c (C) [ 40.485623][ T50] __dump_stack+0x30/0x40 [ 40.485634][ T50] dump_stack_lvl+0xd8/0x12c [ 40.485644][ T50] dump_stack+0x1c/0x28 [ 40.485653][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.485663][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.485672][ T50] kobject_add_internal+0x290/0x6f0 [ 40.485681][ T50] kobject_add_varg+0x9c/0xe8 [ 40.485688][ T50] kobject_add+0x110/0x1c8 [ 40.485695][ T50] device_add+0x394/0x9e0 [ 40.485702][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.485711][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.485720][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.485728][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.485738][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.485746][ T50] hci_rx_work+0x2f4/0xd78 [ 40.485753][ T50] process_scheduled_works+0x788/0x10b8 [ 40.485762][ T50] worker_thread+0x798/0xbd0 [ 40.485770][ T50] kthread+0x304/0x3d4 [ 40.485777][ T50] ret_from_fork+0x10/0x20 [ 40.485789][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.485801][ T50] Bluetooth: hci0: failed to register connection device [ 40.498969][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.498982][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.498991][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.498996][ T50] Workqueue: hci0 hci_rx_work [ 40.499009][ T50] Call trace: [ 40.499011][ T50] show_stack+0x2c/0x3c (C) [ 40.499025][ T50] __dump_stack+0x30/0x40 [ 40.499036][ T50] dump_stack_lvl+0xd8/0x12c [ 40.499045][ T50] dump_stack+0x1c/0x28 [ 40.499055][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.499065][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.499074][ T50] kobject_add_internal+0x290/0x6f0 [ 40.499083][ T50] kobject_add_varg+0x9c/0xe8 [ 40.499090][ T50] kobject_add+0x110/0x1c8 [ 40.499097][ T50] device_add+0x394/0x9e0 [ 40.499104][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.499122][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.499131][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.499140][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.499149][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.499158][ T50] hci_rx_work+0x2f4/0xd78 [ 40.499164][ T50] process_scheduled_works+0x788/0x10b8 [ 40.499174][ T50] worker_thread+0x798/0xbd0 [ 40.499182][ T50] kthread+0x304/0x3d4 [ 40.499190][ T50] ret_from_fork+0x10/0x20 [ 40.499202][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.499214][ T50] Bluetooth: hci0: failed to register connection device [ 40.507121][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.507132][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.507144][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.507150][ T50] Workqueue: hci0 hci_rx_work [ 40.507164][ T50] Call trace: [ 40.507167][ T50] show_stack+0x2c/0x3c (C) [ 40.507181][ T50] __dump_stack+0x30/0x40 [ 40.507192][ T50] dump_stack_lvl+0xd8/0x12c [ 40.507202][ T50] dump_stack+0x1c/0x28 [ 40.507212][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.507222][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.507231][ T50] kobject_add_internal+0x290/0x6f0 [ 40.507240][ T50] kobject_add_varg+0x9c/0xe8 [ 40.507247][ T50] kobject_add+0x110/0x1c8 [ 40.507254][ T50] device_add+0x394/0x9e0 [ 40.507262][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.507272][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.507280][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.507289][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.507298][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.507306][ T50] hci_rx_work+0x2f4/0xd78 [ 40.507313][ T50] process_scheduled_works+0x788/0x10b8 [ 40.507322][ T50] worker_thread+0x798/0xbd0 [ 40.507330][ T50] kthread+0x304/0x3d4 [ 40.507338][ T50] ret_from_fork+0x10/0x20 [ 40.507349][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.507361][ T50] Bluetooth: hci0: failed to register connection device [ 40.516769][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.516783][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.516793][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.516798][ T50] Workqueue: hci0 hci_rx_work [ 40.516810][ T50] Call trace: [ 40.516813][ T50] show_stack+0x2c/0x3c (C) [ 40.516826][ T50] __dump_stack+0x30/0x40 [ 40.516837][ T50] dump_stack_lvl+0xd8/0x12c [ 40.516847][ T50] dump_stack+0x1c/0x28 [ 40.516856][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.516866][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.516876][ T50] kobject_add_internal+0x290/0x6f0 [ 40.516885][ T50] kobject_add_varg+0x9c/0xe8 [ 40.516892][ T50] kobject_add+0x110/0x1c8 [ 40.516898][ T50] device_add+0x394/0x9e0 [ 40.516906][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.516916][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.516924][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.516932][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.516942][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.516950][ T50] hci_rx_work+0x2f4/0xd78 [ 40.516957][ T50] process_scheduled_works+0x788/0x10b8 [ 40.516966][ T50] worker_thread+0x798/0xbd0 [ 40.516975][ T50] kthread+0x304/0x3d4 [ 40.516982][ T50] ret_from_fork+0x10/0x20 [ 40.516994][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.517005][ T50] Bluetooth: hci0: failed to register connection device [ 40.526203][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.526215][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.526224][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.526229][ T50] Workqueue: hci0 hci_rx_work [ 40.526242][ T50] Call trace: [ 40.526244][ T50] show_stack+0x2c/0x3c (C) [ 40.526258][ T50] __dump_stack+0x30/0x40 [ 40.526268][ T50] dump_stack_lvl+0xd8/0x12c [ 40.526278][ T50] dump_stack+0x1c/0x28 [ 40.526287][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.526297][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.526307][ T50] kobject_add_internal+0x290/0x6f0 [ 40.526316][ T50] kobject_add_varg+0x9c/0xe8 [ 40.526322][ T50] kobject_add+0x110/0x1c8 [ 40.526329][ T50] device_add+0x394/0x9e0 [ 40.526337][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.526346][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.526354][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.526362][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.526371][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.526380][ T50] hci_rx_work+0x2f4/0xd78 [ 40.526386][ T50] process_scheduled_works+0x788/0x10b8 [ 40.526396][ T50] worker_thread+0x798/0xbd0 [ 40.526404][ T50] kthread+0x304/0x3d4 [ 40.526412][ T50] ret_from_fork+0x10/0x20 [ 40.526424][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.526436][ T50] Bluetooth: hci0: failed to register connection device [ 40.535066][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.535077][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.535087][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.535091][ T50] Workqueue: hci0 hci_rx_work [ 40.535102][ T50] Call trace: [ 40.535105][ T50] show_stack+0x2c/0x3c (C) [ 40.535125][ T50] __dump_stack+0x30/0x40 [ 40.535136][ T50] dump_stack_lvl+0xd8/0x12c [ 40.535146][ T50] dump_stack+0x1c/0x28 [ 40.535156][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.535166][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.535175][ T50] kobject_add_internal+0x290/0x6f0 [ 40.535183][ T50] kobject_add_varg+0x9c/0xe8 [ 40.535190][ T50] kobject_add+0x110/0x1c8 [ 40.535197][ T50] device_add+0x394/0x9e0 [ 40.535204][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.535213][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.535222][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.535230][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.535239][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.535247][ T50] hci_rx_work+0x2f4/0xd78 [ 40.535254][ T50] process_scheduled_works+0x788/0x10b8 [ 40.535263][ T50] worker_thread+0x798/0xbd0 [ 40.535271][ T50] kthread+0x304/0x3d4 [ 40.535278][ T50] ret_from_fork+0x10/0x20 [ 40.535291][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.535302][ T50] Bluetooth: hci0: failed to register connection device [ 40.543892][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.543902][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.543912][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.543917][ T50] Workqueue: hci0 hci_rx_work [ 40.543927][ T50] Call trace: [ 40.543930][ T50] show_stack+0x2c/0x3c (C) [ 40.543942][ T50] __dump_stack+0x30/0x40 [ 40.543952][ T50] dump_stack_lvl+0xd8/0x12c [ 40.543962][ T50] dump_stack+0x1c/0x28 [ 40.543971][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.543981][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.543990][ T50] kobject_add_internal+0x290/0x6f0 [ 40.543998][ T50] kobject_add_varg+0x9c/0xe8 [ 40.544005][ T50] kobject_add+0x110/0x1c8 [ 40.544012][ T50] device_add+0x394/0x9e0 [ 40.544019][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.544028][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.544037][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.544045][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.544054][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.544062][ T50] hci_rx_work+0x2f4/0xd78 [ 40.544069][ T50] process_scheduled_works+0x788/0x10b8 [ 40.544078][ T50] worker_thread+0x798/0xbd0 [ 40.544086][ T50] kthread+0x304/0x3d4 [ 40.544094][ T50] ret_from_fork+0x10/0x20 [ 40.544106][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.544126][ T50] Bluetooth: hci0: failed to register connection device [ 40.552628][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.552639][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.552649][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.552654][ T50] Workqueue: hci0 hci_rx_work [ 40.552666][ T50] Call trace: [ 40.552668][ T50] show_stack+0x2c/0x3c (C) [ 40.552681][ T50] __dump_stack+0x30/0x40 [ 40.552691][ T50] dump_stack_lvl+0xd8/0x12c [ 40.552701][ T50] dump_stack+0x1c/0x28 [ 40.552710][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.552721][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.552730][ T50] kobject_add_internal+0x290/0x6f0 [ 40.552739][ T50] kobject_add_varg+0x9c/0xe8 [ 40.552745][ T50] kobject_add+0x110/0x1c8 [ 40.552752][ T50] device_add+0x394/0x9e0 [ 40.552759][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.552769][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.552777][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.552785][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.552794][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.552803][ T50] hci_rx_work+0x2f4/0xd78 [ 40.552810][ T50] process_scheduled_works+0x788/0x10b8 [ 40.552819][ T50] worker_thread+0x798/0xbd0 [ 40.552827][ T50] kthread+0x304/0x3d4 [ 40.552835][ T50] ret_from_fork+0x10/0x20 [ 40.552846][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.552858][ T50] Bluetooth: hci0: failed to register connection device [ 40.562849][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.562862][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.562872][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.562877][ T50] Workqueue: hci0 hci_rx_work [ 40.562889][ T50] Call trace: [ 40.562892][ T50] show_stack+0x2c/0x3c (C) [ 40.562906][ T50] __dump_stack+0x30/0x40 [ 40.562917][ T50] dump_stack_lvl+0xd8/0x12c [ 40.562927][ T50] dump_stack+0x1c/0x28 [ 40.562936][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.562947][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.562956][ T50] kobject_add_internal+0x290/0x6f0 [ 40.562966][ T50] kobject_add_varg+0x9c/0xe8 [ 40.562973][ T50] kobject_add+0x110/0x1c8 [ 40.562980][ T50] device_add+0x394/0x9e0 [ 40.562987][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.562997][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.563006][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.563014][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.563024][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.563032][ T50] hci_rx_work+0x2f4/0xd78 [ 40.563039][ T50] process_scheduled_works+0x788/0x10b8 [ 40.563048][ T50] worker_thread+0x798/0xbd0 [ 40.563056][ T50] kthread+0x304/0x3d4 [ 40.563064][ T50] ret_from_fork+0x10/0x20 [ 40.563076][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.563088][ T50] Bluetooth: hci0: failed to register connection device [ 40.569534][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.569545][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.569554][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.569559][ T50] Workqueue: hci0 hci_rx_work [ 40.569569][ T50] Call trace: [ 40.569572][ T50] show_stack+0x2c/0x3c (C) [ 40.569584][ T50] __dump_stack+0x30/0x40 [ 40.569594][ T50] dump_stack_lvl+0xd8/0x12c [ 40.569603][ T50] dump_stack+0x1c/0x28 [ 40.569613][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.569622][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.569632][ T50] kobject_add_internal+0x290/0x6f0 [ 40.569640][ T50] kobject_add_varg+0x9c/0xe8 [ 40.569647][ T50] kobject_add+0x110/0x1c8 [ 40.569654][ T50] device_add+0x394/0x9e0 [ 40.569661][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.569670][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.569678][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.569686][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.569695][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.569704][ T50] hci_rx_work+0x2f4/0xd78 [ 40.569711][ T50] process_scheduled_works+0x788/0x10b8 [ 40.569720][ T50] worker_thread+0x798/0xbd0 [ 40.569728][ T50] kthread+0x304/0x3d4 [ 40.569736][ T50] ret_from_fork+0x10/0x20 [ 40.569748][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.569760][ T50] Bluetooth: hci0: failed to register connection device [ 40.582400][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.582412][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.582422][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.582427][ T50] Workqueue: hci0 hci_rx_work [ 40.582439][ T50] Call trace: [ 40.582442][ T50] show_stack+0x2c/0x3c (C) [ 40.582455][ T50] __dump_stack+0x30/0x40 [ 40.582465][ T50] dump_stack_lvl+0xd8/0x12c [ 40.582475][ T50] dump_stack+0x1c/0x28 [ 40.582485][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.582495][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.582504][ T50] kobject_add_internal+0x290/0x6f0 [ 40.582512][ T50] kobject_add_varg+0x9c/0xe8 [ 40.582519][ T50] kobject_add+0x110/0x1c8 [ 40.582526][ T50] device_add+0x394/0x9e0 [ 40.582533][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.582542][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.582551][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.582559][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.582567][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.582576][ T50] hci_rx_work+0x2f4/0xd78 [ 40.582582][ T50] process_scheduled_works+0x788/0x10b8 [ 40.582592][ T50] worker_thread+0x798/0xbd0 [ 40.582600][ T50] kthread+0x304/0x3d4 [ 40.582607][ T50] ret_from_fork+0x10/0x20 [ 40.582619][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.582631][ T50] Bluetooth: hci0: failed to register connection device [ 40.588281][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.588291][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.588300][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.588305][ T50] Workqueue: hci0 hci_rx_work [ 40.588315][ T50] Call trace: [ 40.588317][ T50] show_stack+0x2c/0x3c (C) [ 40.588330][ T50] __dump_stack+0x30/0x40 [ 40.588340][ T50] dump_stack_lvl+0xd8/0x12c [ 40.588349][ T50] dump_stack+0x1c/0x28 [ 40.588359][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.588368][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.588378][ T50] kobject_add_internal+0x290/0x6f0 [ 40.588385][ T50] kobject_add_varg+0x9c/0xe8 [ 40.588392][ T50] kobject_add+0x110/0x1c8 [ 40.588399][ T50] device_add+0x394/0x9e0 [ 40.588406][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.588415][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.588423][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.588431][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.588440][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.588448][ T50] hci_rx_work+0x2f4/0xd78 [ 40.588455][ T50] process_scheduled_works+0x788/0x10b8 [ 40.588464][ T50] worker_thread+0x798/0xbd0 [ 40.588472][ T50] kthread+0x304/0x3d4 [ 40.588480][ T50] ret_from_fork+0x10/0x20 [ 40.588491][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.588502][ T50] Bluetooth: hci0: failed to register connection device [ 40.599063][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.599075][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.599085][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.599090][ T50] Workqueue: hci0 hci_rx_work [ 40.599102][ T50] Call trace: [ 40.599104][ T50] show_stack+0x2c/0x3c (C) [ 40.599127][ T50] __dump_stack+0x30/0x40 [ 40.599138][ T50] dump_stack_lvl+0xd8/0x12c [ 40.599149][ T50] dump_stack+0x1c/0x28 [ 40.599159][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.599169][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.599179][ T50] kobject_add_internal+0x290/0x6f0 [ 40.599187][ T50] kobject_add_varg+0x9c/0xe8 [ 40.599194][ T50] kobject_add+0x110/0x1c8 [ 40.599201][ T50] device_add+0x394/0x9e0 [ 40.599209][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.599218][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.599226][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.599235][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.599244][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.599252][ T50] hci_rx_work+0x2f4/0xd78 [ 40.599259][ T50] process_scheduled_works+0x788/0x10b8 [ 40.599268][ T50] worker_thread+0x798/0xbd0 [ 40.599276][ T50] kthread+0x304/0x3d4 [ 40.599284][ T50] ret_from_fork+0x10/0x20 [ 40.599296][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.599307][ T50] Bluetooth: hci0: failed to register connection device [ 40.607826][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.607837][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.607847][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.607852][ T50] Workqueue: hci0 hci_rx_work [ 40.607863][ T50] Call trace: [ 40.607865][ T50] show_stack+0x2c/0x3c (C) [ 40.607878][ T50] __dump_stack+0x30/0x40 [ 40.607889][ T50] dump_stack_lvl+0xd8/0x12c [ 40.607899][ T50] dump_stack+0x1c/0x28 [ 40.607908][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.607918][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.607928][ T50] kobject_add_internal+0x290/0x6f0 [ 40.607936][ T50] kobject_add_varg+0x9c/0xe8 [ 40.607942][ T50] kobject_add+0x110/0x1c8 [ 40.607949][ T50] device_add+0x394/0x9e0 [ 40.607956][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.607966][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.607974][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.607982][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.607991][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.607999][ T50] hci_rx_work+0x2f4/0xd78 [ 40.608006][ T50] process_scheduled_works+0x788/0x10b8 [ 40.608014][ T50] worker_thread+0x798/0xbd0 [ 40.608023][ T50] kthread+0x304/0x3d4 [ 40.608030][ T50] ret_from_fork+0x10/0x20 [ 40.608042][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.608053][ T50] Bluetooth: hci0: failed to register connection device [ 40.616923][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.616933][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.616942][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.616947][ T50] Workqueue: hci0 hci_rx_work [ 40.616958][ T50] Call trace: [ 40.616961][ T50] show_stack+0x2c/0x3c (C) [ 40.616973][ T50] __dump_stack+0x30/0x40 [ 40.616983][ T50] dump_stack_lvl+0xd8/0x12c [ 40.616993][ T50] dump_stack+0x1c/0x28 [ 40.617002][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.617012][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.617021][ T50] kobject_add_internal+0x290/0x6f0 [ 40.617029][ T50] kobject_add_varg+0x9c/0xe8 [ 40.617036][ T50] kobject_add+0x110/0x1c8 [ 40.617043][ T50] device_add+0x394/0x9e0 [ 40.617050][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.617059][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.617067][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.617075][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.617084][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.617093][ T50] hci_rx_work+0x2f4/0xd78 [ 40.617099][ T50] process_scheduled_works+0x788/0x10b8 [ 40.617116][ T50] worker_thread+0x798/0xbd0 [ 40.617125][ T50] kthread+0x304/0x3d4 [ 40.617133][ T50] ret_from_fork+0x10/0x20 [ 40.617148][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.617162][ T50] Bluetooth: hci0: failed to register connection device [ 40.624448][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.624458][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.624468][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.624472][ T50] Workqueue: hci0 hci_rx_work [ 40.624483][ T50] Call trace: [ 40.624485][ T50] show_stack+0x2c/0x3c (C) [ 40.624498][ T50] __dump_stack+0x30/0x40 [ 40.624508][ T50] dump_stack_lvl+0xd8/0x12c [ 40.624518][ T50] dump_stack+0x1c/0x28 [ 40.624527][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.624537][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.624546][ T50] kobject_add_internal+0x290/0x6f0 [ 40.624554][ T50] kobject_add_varg+0x9c/0xe8 [ 40.624561][ T50] kobject_add+0x110/0x1c8 [ 40.624568][ T50] device_add+0x394/0x9e0 [ 40.624575][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.624584][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.624592][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.624600][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.624610][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.624618][ T50] hci_rx_work+0x2f4/0xd78 [ 40.624625][ T50] process_scheduled_works+0x788/0x10b8 [ 40.624634][ T50] worker_thread+0x798/0xbd0 [ 40.624642][ T50] kthread+0x304/0x3d4 [ 40.624649][ T50] ret_from_fork+0x10/0x20 [ 40.624661][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.624673][ T50] Bluetooth: hci0: failed to register connection device [ 40.635331][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.635342][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.635352][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.635357][ T50] Workqueue: hci0 hci_rx_work [ 40.635368][ T50] Call trace: [ 40.635371][ T50] show_stack+0x2c/0x3c (C) [ 40.635383][ T50] __dump_stack+0x30/0x40 [ 40.635394][ T50] dump_stack_lvl+0xd8/0x12c [ 40.635403][ T50] dump_stack+0x1c/0x28 [ 40.635413][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.635423][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.635432][ T50] kobject_add_internal+0x290/0x6f0 [ 40.635440][ T50] kobject_add_varg+0x9c/0xe8 [ 40.635447][ T50] kobject_add+0x110/0x1c8 [ 40.635453][ T50] device_add+0x394/0x9e0 [ 40.635461][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.635470][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.635478][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.635486][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.635496][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.635504][ T50] hci_rx_work+0x2f4/0xd78 [ 40.635511][ T50] process_scheduled_works+0x788/0x10b8 [ 40.635519][ T50] worker_thread+0x798/0xbd0 [ 40.635528][ T50] kthread+0x304/0x3d4 [ 40.635535][ T50] ret_from_fork+0x10/0x20 [ 40.635547][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.635559][ T50] Bluetooth: hci0: failed to register connection device [ 40.643239][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.643251][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.643262][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.643267][ T50] Workqueue: hci0 hci_rx_work [ 40.643278][ T50] Call trace: [ 40.643281][ T50] show_stack+0x2c/0x3c (C) [ 40.643295][ T50] __dump_stack+0x30/0x40 [ 40.643306][ T50] dump_stack_lvl+0xd8/0x12c [ 40.643315][ T50] dump_stack+0x1c/0x28 [ 40.643325][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.643335][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.643345][ T50] kobject_add_internal+0x290/0x6f0 [ 40.643353][ T50] kobject_add_varg+0x9c/0xe8 [ 40.643360][ T50] kobject_add+0x110/0x1c8 [ 40.643367][ T50] device_add+0x394/0x9e0 [ 40.643374][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.643383][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.643392][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.643400][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.643409][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.643417][ T50] hci_rx_work+0x2f4/0xd78 [ 40.643424][ T50] process_scheduled_works+0x788/0x10b8 [ 40.643433][ T50] worker_thread+0x798/0xbd0 [ 40.643441][ T50] kthread+0x304/0x3d4 [ 40.643449][ T50] ret_from_fork+0x10/0x20 [ 40.643461][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.643472][ T50] Bluetooth: hci0: failed to register connection device [ 40.649868][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.649878][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.649887][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.649892][ T50] Workqueue: hci0 hci_rx_work [ 40.649902][ T50] Call trace: [ 40.649904][ T50] show_stack+0x2c/0x3c (C) [ 40.649917][ T50] __dump_stack+0x30/0x40 [ 40.649927][ T50] dump_stack_lvl+0xd8/0x12c [ 40.649937][ T50] dump_stack+0x1c/0x28 [ 40.649946][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.649956][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.649965][ T50] kobject_add_internal+0x290/0x6f0 [ 40.649973][ T50] kobject_add_varg+0x9c/0xe8 [ 40.649980][ T50] kobject_add+0x110/0x1c8 [ 40.649987][ T50] device_add+0x394/0x9e0 [ 40.649994][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.650003][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.650011][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.650020][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.650029][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.650037][ T50] hci_rx_work+0x2f4/0xd78 [ 40.650044][ T50] process_scheduled_works+0x788/0x10b8 [ 40.650053][ T50] worker_thread+0x798/0xbd0 [ 40.650061][ T50] kthread+0x304/0x3d4 [ 40.650069][ T50] ret_from_fork+0x10/0x20 [ 40.650081][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.653430][ T50] Bluetooth: hci0: failed to register connection device [ 40.662721][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.662733][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.662743][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.662748][ T50] Workqueue: hci0 hci_rx_work [ 40.662761][ T50] Call trace: [ 40.662764][ T50] show_stack+0x2c/0x3c (C) [ 40.662778][ T50] __dump_stack+0x30/0x40 [ 40.662788][ T50] dump_stack_lvl+0xd8/0x12c [ 40.662798][ T50] dump_stack+0x1c/0x28 [ 40.662807][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.662817][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.662827][ T50] kobject_add_internal+0x290/0x6f0 [ 40.662836][ T50] kobject_add_varg+0x9c/0xe8 [ 40.662843][ T50] kobject_add+0x110/0x1c8 [ 40.662850][ T50] device_add+0x394/0x9e0 [ 40.662857][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.662867][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.662875][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.662883][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.662892][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.662901][ T50] hci_rx_work+0x2f4/0xd78 [ 40.662908][ T50] process_scheduled_works+0x788/0x10b8 [ 40.662917][ T50] worker_thread+0x798/0xbd0 [ 40.662925][ T50] kthread+0x304/0x3d4 [ 40.662933][ T50] ret_from_fork+0x10/0x20 [ 40.662944][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.662955][ T50] Bluetooth: hci0: failed to register connection device [ 40.669031][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.669041][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.669050][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.669055][ T50] Workqueue: hci0 hci_rx_work [ 40.669065][ T50] Call trace: [ 40.669068][ T50] show_stack+0x2c/0x3c (C) [ 40.669081][ T50] __dump_stack+0x30/0x40 [ 40.669092][ T50] dump_stack_lvl+0xd8/0x12c [ 40.669102][ T50] dump_stack+0x1c/0x28 [ 40.669120][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.669130][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.669139][ T50] kobject_add_internal+0x290/0x6f0 [ 40.669148][ T50] kobject_add_varg+0x9c/0xe8 [ 40.669155][ T50] kobject_add+0x110/0x1c8 [ 40.669162][ T50] device_add+0x394/0x9e0 [ 40.669170][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.669179][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.669187][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.669196][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.669205][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.669213][ T50] hci_rx_work+0x2f4/0xd78 [ 40.669220][ T50] process_scheduled_works+0x788/0x10b8 [ 40.669229][ T50] worker_thread+0x798/0xbd0 [ 40.669238][ T50] kthread+0x304/0x3d4 [ 40.669245][ T50] ret_from_fork+0x10/0x20 [ 40.669258][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.669269][ T50] Bluetooth: hci0: failed to register connection device [ 40.683057][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.683070][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.683080][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.683084][ T50] Workqueue: hci0 hci_rx_work [ 40.683097][ T50] Call trace: [ 40.683099][ T50] show_stack+0x2c/0x3c (C) [ 40.683120][ T50] __dump_stack+0x30/0x40 [ 40.683131][ T50] dump_stack_lvl+0xd8/0x12c [ 40.683141][ T50] dump_stack+0x1c/0x28 [ 40.683151][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.683162][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.683171][ T50] kobject_add_internal+0x290/0x6f0 [ 40.683180][ T50] kobject_add_varg+0x9c/0xe8 [ 40.683187][ T50] kobject_add+0x110/0x1c8 [ 40.683194][ T50] device_add+0x394/0x9e0 [ 40.683202][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.683211][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.683220][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.683228][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.683237][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.683246][ T50] hci_rx_work+0x2f4/0xd78 [ 40.683252][ T50] process_scheduled_works+0x788/0x10b8 [ 40.683262][ T50] worker_thread+0x798/0xbd0 [ 40.683270][ T50] kthread+0x304/0x3d4 [ 40.683278][ T50] ret_from_fork+0x10/0x20 [ 40.683290][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.683301][ T50] Bluetooth: hci0: failed to register connection device [ 40.692557][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.692570][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.692585][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.692591][ T50] Workqueue: hci0 hci_rx_work [ 40.692603][ T50] Call trace: [ 40.692606][ T50] show_stack+0x2c/0x3c (C) [ 40.692620][ T50] __dump_stack+0x30/0x40 [ 40.692630][ T50] dump_stack_lvl+0xd8/0x12c [ 40.692640][ T50] dump_stack+0x1c/0x28 [ 40.692649][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.692660][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.692669][ T50] kobject_add_internal+0x290/0x6f0 [ 40.692678][ T50] kobject_add_varg+0x9c/0xe8 [ 40.692684][ T50] kobject_add+0x110/0x1c8 [ 40.692691][ T50] device_add+0x394/0x9e0 [ 40.692699][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.692708][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.692716][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.692724][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.692734][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.692742][ T50] hci_rx_work+0x2f4/0xd78 [ 40.692749][ T50] process_scheduled_works+0x788/0x10b8 [ 40.692758][ T50] worker_thread+0x798/0xbd0 [ 40.692766][ T50] kthread+0x304/0x3d4 [ 40.692774][ T50] ret_from_fork+0x10/0x20 [ 40.692786][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.692798][ T50] Bluetooth: hci0: failed to register connection device [ 40.704387][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.704399][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.704409][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.704414][ T50] Workqueue: hci0 hci_rx_work [ 40.704426][ T50] Call trace: [ 40.704429][ T50] show_stack+0x2c/0x3c (C) [ 40.704443][ T50] __dump_stack+0x30/0x40 [ 40.704454][ T50] dump_stack_lvl+0xd8/0x12c [ 40.704463][ T50] dump_stack+0x1c/0x28 [ 40.704473][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.704483][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.704492][ T50] kobject_add_internal+0x290/0x6f0 [ 40.704501][ T50] kobject_add_varg+0x9c/0xe8 [ 40.704508][ T50] kobject_add+0x110/0x1c8 [ 40.704515][ T50] device_add+0x394/0x9e0 [ 40.704522][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.704531][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.704539][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.704548][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.704557][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.704565][ T50] hci_rx_work+0x2f4/0xd78 [ 40.704572][ T50] process_scheduled_works+0x788/0x10b8 [ 40.704581][ T50] worker_thread+0x798/0xbd0 [ 40.704589][ T50] kthread+0x304/0x3d4 [ 40.704597][ T50] ret_from_fork+0x10/0x20 [ 40.704609][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.704621][ T50] Bluetooth: hci0: failed to register connection device [ 40.714372][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.714382][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.714392][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.714397][ T50] Workqueue: hci0 hci_rx_work [ 40.714409][ T50] Call trace: [ 40.714412][ T50] show_stack+0x2c/0x3c (C) [ 40.714424][ T50] __dump_stack+0x30/0x40 [ 40.714434][ T50] dump_stack_lvl+0xd8/0x12c [ 40.714444][ T50] dump_stack+0x1c/0x28 [ 40.714454][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.714464][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.714473][ T50] kobject_add_internal+0x290/0x6f0 [ 40.714482][ T50] kobject_add_varg+0x9c/0xe8 [ 40.714493][ T50] kobject_add+0x110/0x1c8 [ 40.714500][ T50] device_add+0x394/0x9e0 [ 40.714508][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.714518][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.714527][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.714536][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.714545][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.714553][ T50] hci_rx_work+0x2f4/0xd78 [ 40.714560][ T50] process_scheduled_works+0x788/0x10b8 [ 40.714569][ T50] worker_thread+0x798/0xbd0 [ 40.714578][ T50] kthread+0x304/0x3d4 [ 40.714586][ T50] ret_from_fork+0x10/0x20 [ 40.714613][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.714627][ T50] Bluetooth: hci0: failed to register connection device [ 40.722618][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.722629][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.722638][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.722643][ T50] Workqueue: hci0 hci_rx_work [ 40.722654][ T50] Call trace: [ 40.722656][ T50] show_stack+0x2c/0x3c (C) [ 40.722669][ T50] __dump_stack+0x30/0x40 [ 40.722679][ T50] dump_stack_lvl+0xd8/0x12c [ 40.722688][ T50] dump_stack+0x1c/0x28 [ 40.722698][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.722708][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.722717][ T50] kobject_add_internal+0x290/0x6f0 [ 40.722725][ T50] kobject_add_varg+0x9c/0xe8 [ 40.722732][ T50] kobject_add+0x110/0x1c8 [ 40.722739][ T50] device_add+0x394/0x9e0 [ 40.722746][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.722756][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.722764][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.722772][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.722781][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.722789][ T50] hci_rx_work+0x2f4/0xd78 [ 40.722796][ T50] process_scheduled_works+0x788/0x10b8 [ 40.722805][ T50] worker_thread+0x798/0xbd0 [ 40.722814][ T50] kthread+0x304/0x3d4 [ 40.722821][ T50] ret_from_fork+0x10/0x20 [ 40.722834][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.722846][ T50] Bluetooth: hci0: failed to register connection device [ 40.728544][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.728554][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.728564][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.728569][ T50] Workqueue: hci0 hci_rx_work [ 40.728579][ T50] Call trace: [ 40.728582][ T50] show_stack+0x2c/0x3c (C) [ 40.728595][ T50] __dump_stack+0x30/0x40 [ 40.728606][ T50] dump_stack_lvl+0xd8/0x12c [ 40.728616][ T50] dump_stack+0x1c/0x28 [ 40.728625][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.728636][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.728646][ T50] kobject_add_internal+0x290/0x6f0 [ 40.728654][ T50] kobject_add_varg+0x9c/0xe8 [ 40.728661][ T50] kobject_add+0x110/0x1c8 [ 40.728668][ T50] device_add+0x394/0x9e0 [ 40.728675][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.728684][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.728694][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.728702][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.728711][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.728719][ T50] hci_rx_work+0x2f4/0xd78 [ 40.728726][ T50] process_scheduled_works+0x788/0x10b8 [ 40.728735][ T50] worker_thread+0x798/0xbd0 [ 40.728744][ T50] kthread+0x304/0x3d4 [ 40.728751][ T50] ret_from_fork+0x10/0x20 [ 40.728764][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.728776][ T50] Bluetooth: hci0: failed to register connection device [ 40.743513][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.743526][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.743535][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.743540][ T50] Workqueue: hci0 hci_rx_work [ 40.743553][ T50] Call trace: [ 40.743556][ T50] show_stack+0x2c/0x3c (C) [ 40.743569][ T50] __dump_stack+0x30/0x40 [ 40.743579][ T50] dump_stack_lvl+0xd8/0x12c [ 40.743589][ T50] dump_stack+0x1c/0x28 [ 40.743598][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.743608][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.743618][ T50] kobject_add_internal+0x290/0x6f0 [ 40.743627][ T50] kobject_add_varg+0x9c/0xe8 [ 40.743634][ T50] kobject_add+0x110/0x1c8 [ 40.743641][ T50] device_add+0x394/0x9e0 [ 40.743648][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.743658][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.743666][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.743674][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.743683][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.743692][ T50] hci_rx_work+0x2f4/0xd78 [ 40.743698][ T50] process_scheduled_works+0x788/0x10b8 [ 40.743708][ T50] worker_thread+0x798/0xbd0 [ 40.743716][ T50] kthread+0x304/0x3d4 [ 40.743724][ T50] ret_from_fork+0x10/0x20 [ 40.743736][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.743748][ T50] Bluetooth: hci0: failed to register connection device [ 40.749491][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.749501][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.749511][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.749515][ T50] Workqueue: hci0 hci_rx_work [ 40.749526][ T50] Call trace: [ 40.749528][ T50] show_stack+0x2c/0x3c (C) [ 40.749541][ T50] __dump_stack+0x30/0x40 [ 40.749552][ T50] dump_stack_lvl+0xd8/0x12c [ 40.749561][ T50] dump_stack+0x1c/0x28 [ 40.749571][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.749581][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.749590][ T50] kobject_add_internal+0x290/0x6f0 [ 40.749599][ T50] kobject_add_varg+0x9c/0xe8 [ 40.749606][ T50] kobject_add+0x110/0x1c8 [ 40.749612][ T50] device_add+0x394/0x9e0 [ 40.749620][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.749629][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.749638][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.749647][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.749656][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.749665][ T50] hci_rx_work+0x2f4/0xd78 [ 40.749671][ T50] process_scheduled_works+0x788/0x10b8 [ 40.749680][ T50] worker_thread+0x798/0xbd0 [ 40.749689][ T50] kthread+0x304/0x3d4 [ 40.749696][ T50] ret_from_fork+0x10/0x20 [ 40.749708][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.749719][ T50] Bluetooth: hci0: failed to register connection device [ 40.762019][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.762032][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.762042][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.762047][ T50] Workqueue: hci0 hci_rx_work [ 40.762060][ T50] Call trace: [ 40.762062][ T50] show_stack+0x2c/0x3c (C) [ 40.762077][ T50] __dump_stack+0x30/0x40 [ 40.762088][ T50] dump_stack_lvl+0xd8/0x12c [ 40.762097][ T50] dump_stack+0x1c/0x28 [ 40.762107][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.762122][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.762132][ T50] kobject_add_internal+0x290/0x6f0 [ 40.762141][ T50] kobject_add_varg+0x9c/0xe8 [ 40.762148][ T50] kobject_add+0x110/0x1c8 [ 40.762155][ T50] device_add+0x394/0x9e0 [ 40.762163][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.762172][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.762181][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.762189][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.762198][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.762206][ T50] hci_rx_work+0x2f4/0xd78 [ 40.762213][ T50] process_scheduled_works+0x788/0x10b8 [ 40.762222][ T50] worker_thread+0x798/0xbd0 [ 40.762231][ T50] kthread+0x304/0x3d4 [ 40.762238][ T50] ret_from_fork+0x10/0x20 [ 40.762251][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.762262][ T50] Bluetooth: hci0: failed to register connection device [ 40.767885][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.767896][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.767905][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.767910][ T50] Workqueue: hci0 hci_rx_work [ 40.767920][ T50] Call trace: [ 40.767923][ T50] show_stack+0x2c/0x3c (C) [ 40.767935][ T50] __dump_stack+0x30/0x40 [ 40.767946][ T50] dump_stack_lvl+0xd8/0x12c [ 40.767956][ T50] dump_stack+0x1c/0x28 [ 40.767965][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.767975][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.767985][ T50] kobject_add_internal+0x290/0x6f0 [ 40.767993][ T50] kobject_add_varg+0x9c/0xe8 [ 40.768000][ T50] kobject_add+0x110/0x1c8 [ 40.768007][ T50] device_add+0x394/0x9e0 [ 40.768014][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.768023][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.768031][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.768039][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.768048][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.768057][ T50] hci_rx_work+0x2f4/0xd78 [ 40.768063][ T50] process_scheduled_works+0x788/0x10b8 [ 40.768073][ T50] worker_thread+0x798/0xbd0 [ 40.768081][ T50] kthread+0x304/0x3d4 [ 40.768088][ T50] ret_from_fork+0x10/0x20 [ 40.768100][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.768118][ T50] Bluetooth: hci0: failed to register connection device [ 40.776600][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.776610][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.776620][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.776625][ T50] Workqueue: hci0 hci_rx_work [ 40.776635][ T50] Call trace: [ 40.776638][ T50] show_stack+0x2c/0x3c (C) [ 40.776651][ T50] __dump_stack+0x30/0x40 [ 40.776662][ T50] dump_stack_lvl+0xd8/0x12c [ 40.776672][ T50] dump_stack+0x1c/0x28 [ 40.776681][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.776692][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.776701][ T50] kobject_add_internal+0x290/0x6f0 [ 40.776710][ T50] kobject_add_varg+0x9c/0xe8 [ 40.776717][ T50] kobject_add+0x110/0x1c8 [ 40.776724][ T50] device_add+0x394/0x9e0 [ 40.776731][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.776740][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.776749][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.776757][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.776767][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.776776][ T50] hci_rx_work+0x2f4/0xd78 [ 40.776782][ T50] process_scheduled_works+0x788/0x10b8 [ 40.776791][ T50] worker_thread+0x798/0xbd0 [ 40.776800][ T50] kthread+0x304/0x3d4 [ 40.776807][ T50] ret_from_fork+0x10/0x20 [ 40.776819][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.776830][ T50] Bluetooth: hci0: failed to register connection device [ 40.787104][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.787123][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.787134][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.787141][ T50] Workqueue: hci0 hci_rx_work [ 40.787155][ T50] Call trace: [ 40.787159][ T50] show_stack+0x2c/0x3c (C) [ 40.787174][ T50] __dump_stack+0x30/0x40 [ 40.787185][ T50] dump_stack_lvl+0xd8/0x12c [ 40.787196][ T50] dump_stack+0x1c/0x28 [ 40.787205][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.787216][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.787225][ T50] kobject_add_internal+0x290/0x6f0 [ 40.787234][ T50] kobject_add_varg+0x9c/0xe8 [ 40.787241][ T50] kobject_add+0x110/0x1c8 [ 40.787248][ T50] device_add+0x394/0x9e0 [ 40.787255][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.787265][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.787274][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.787282][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.787291][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.787299][ T50] hci_rx_work+0x2f4/0xd78 [ 40.787306][ T50] process_scheduled_works+0x788/0x10b8 [ 40.787315][ T50] worker_thread+0x798/0xbd0 [ 40.787324][ T50] kthread+0x304/0x3d4 [ 40.787331][ T50] ret_from_fork+0x10/0x20 [ 40.787344][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.787356][ T50] Bluetooth: hci0: failed to register connection device [ 40.794948][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.794958][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.794968][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.794972][ T50] Workqueue: hci0 hci_rx_work [ 40.794983][ T50] Call trace: [ 40.794986][ T50] show_stack+0x2c/0x3c (C) [ 40.794998][ T50] __dump_stack+0x30/0x40 [ 40.795008][ T50] dump_stack_lvl+0xd8/0x12c [ 40.795018][ T50] dump_stack+0x1c/0x28 [ 40.795027][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.795037][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.795047][ T50] kobject_add_internal+0x290/0x6f0 [ 40.795055][ T50] kobject_add_varg+0x9c/0xe8 [ 40.795062][ T50] kobject_add+0x110/0x1c8 [ 40.795068][ T50] device_add+0x394/0x9e0 [ 40.795075][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.795084][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.795093][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.795101][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.795119][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.795127][ T50] hci_rx_work+0x2f4/0xd78 [ 40.795135][ T50] process_scheduled_works+0x788/0x10b8 [ 40.795144][ T50] worker_thread+0x798/0xbd0 [ 40.795153][ T50] kthread+0x304/0x3d4 [ 40.795161][ T50] ret_from_fork+0x10/0x20 [ 40.795173][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.795186][ T50] Bluetooth: hci0: failed to register connection device [ 40.806138][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.806152][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.806164][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.806171][ T50] Workqueue: hci0 hci_rx_work [ 40.806186][ T50] Call trace: [ 40.806190][ T50] show_stack+0x2c/0x3c (C) [ 40.806205][ T50] __dump_stack+0x30/0x40 [ 40.806215][ T50] dump_stack_lvl+0xd8/0x12c [ 40.806225][ T50] dump_stack+0x1c/0x28 [ 40.806234][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.806244][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.806254][ T50] kobject_add_internal+0x290/0x6f0 [ 40.806263][ T50] kobject_add_varg+0x9c/0xe8 [ 40.806270][ T50] kobject_add+0x110/0x1c8 [ 40.806276][ T50] device_add+0x394/0x9e0 [ 40.806284][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.806294][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.806302][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.806310][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.806320][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.806328][ T50] hci_rx_work+0x2f4/0xd78 [ 40.806335][ T50] process_scheduled_works+0x788/0x10b8 [ 40.806344][ T50] worker_thread+0x798/0xbd0 [ 40.806353][ T50] kthread+0x304/0x3d4 [ 40.806360][ T50] ret_from_fork+0x10/0x20 [ 40.806372][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.806385][ T50] Bluetooth: hci0: failed to register connection device [ 40.816084][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.816095][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.816105][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.816118][ T50] Workqueue: hci0 hci_rx_work [ 40.816130][ T50] Call trace: [ 40.816134][ T50] show_stack+0x2c/0x3c (C) [ 40.816150][ T50] __dump_stack+0x30/0x40 [ 40.816163][ T50] dump_stack_lvl+0xd8/0x12c [ 40.816173][ T50] dump_stack+0x1c/0x28 [ 40.816183][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.816193][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.816203][ T50] kobject_add_internal+0x290/0x6f0 [ 40.816211][ T50] kobject_add_varg+0x9c/0xe8 [ 40.816218][ T50] kobject_add+0x110/0x1c8 [ 40.816225][ T50] device_add+0x394/0x9e0 [ 40.816233][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.816242][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.816251][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.816259][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.816269][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.816278][ T50] hci_rx_work+0x2f4/0xd78 [ 40.816284][ T50] process_scheduled_works+0x788/0x10b8 [ 40.816293][ T50] worker_thread+0x798/0xbd0 [ 40.816302][ T50] kthread+0x304/0x3d4 [ 40.816309][ T50] ret_from_fork+0x10/0x20 [ 40.816322][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.816334][ T50] Bluetooth: hci0: failed to register connection device [ 40.823608][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.823619][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.823629][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.823633][ T50] Workqueue: hci0 hci_rx_work [ 40.823645][ T50] Call trace: [ 40.823647][ T50] show_stack+0x2c/0x3c (C) [ 40.823661][ T50] __dump_stack+0x30/0x40 [ 40.823671][ T50] dump_stack_lvl+0xd8/0x12c [ 40.823681][ T50] dump_stack+0x1c/0x28 [ 40.823690][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.823701][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.823710][ T50] kobject_add_internal+0x290/0x6f0 [ 40.823719][ T50] kobject_add_varg+0x9c/0xe8 [ 40.823726][ T50] kobject_add+0x110/0x1c8 [ 40.823733][ T50] device_add+0x394/0x9e0 [ 40.823740][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.823750][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.823759][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.823767][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.823777][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.823785][ T50] hci_rx_work+0x2f4/0xd78 [ 40.823792][ T50] process_scheduled_works+0x788/0x10b8 [ 40.823801][ T50] worker_thread+0x798/0xbd0 [ 40.823809][ T50] kthread+0x304/0x3d4 [ 40.823817][ T50] ret_from_fork+0x10/0x20 [ 40.823829][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.823840][ T50] Bluetooth: hci0: failed to register connection device [ 40.829517][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.829528][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.829538][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.829542][ T50] Workqueue: hci0 hci_rx_work [ 40.829553][ T50] Call trace: [ 40.829556][ T50] show_stack+0x2c/0x3c (C) [ 40.829568][ T50] __dump_stack+0x30/0x40 [ 40.829578][ T50] dump_stack_lvl+0xd8/0x12c [ 40.829588][ T50] dump_stack+0x1c/0x28 [ 40.829597][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.829607][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.829617][ T50] kobject_add_internal+0x290/0x6f0 [ 40.829625][ T50] kobject_add_varg+0x9c/0xe8 [ 40.829632][ T50] kobject_add+0x110/0x1c8 [ 40.829638][ T50] device_add+0x394/0x9e0 [ 40.829646][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.829655][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.829663][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.829671][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.829681][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.829689][ T50] hci_rx_work+0x2f4/0xd78 [ 40.829696][ T50] process_scheduled_works+0x788/0x10b8 [ 40.829705][ T50] worker_thread+0x798/0xbd0 [ 40.829714][ T50] kthread+0x304/0x3d4 [ 40.829721][ T50] ret_from_fork+0x10/0x20 [ 40.829733][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.829743][ T50] Bluetooth: hci0: failed to register connection device [ 40.840504][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.840516][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.840526][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.840531][ T50] Workqueue: hci0 hci_rx_work [ 40.840544][ T50] Call trace: [ 40.840546][ T50] show_stack+0x2c/0x3c (C) [ 40.840560][ T50] __dump_stack+0x30/0x40 [ 40.840572][ T50] dump_stack_lvl+0xd8/0x12c [ 40.840582][ T50] dump_stack+0x1c/0x28 [ 40.840591][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.840602][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.840612][ T50] kobject_add_internal+0x290/0x6f0 [ 40.840621][ T50] kobject_add_varg+0x9c/0xe8 [ 40.840628][ T50] kobject_add+0x110/0x1c8 [ 40.840635][ T50] device_add+0x394/0x9e0 [ 40.840642][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.840652][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.840661][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.840669][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.840679][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.840687][ T50] hci_rx_work+0x2f4/0xd78 [ 40.840694][ T50] process_scheduled_works+0x788/0x10b8 [ 40.840703][ T50] worker_thread+0x798/0xbd0 [ 40.840712][ T50] kthread+0x304/0x3d4 [ 40.840719][ T50] ret_from_fork+0x10/0x20 [ 40.840732][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.840744][ T50] Bluetooth: hci0: failed to register connection device [ 40.846332][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.846342][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.846351][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.846356][ T50] Workqueue: hci0 hci_rx_work [ 40.846366][ T50] Call trace: [ 40.846369][ T50] show_stack+0x2c/0x3c (C) [ 40.846381][ T50] __dump_stack+0x30/0x40 [ 40.846391][ T50] dump_stack_lvl+0xd8/0x12c [ 40.846401][ T50] dump_stack+0x1c/0x28 [ 40.846410][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.846420][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.846429][ T50] kobject_add_internal+0x290/0x6f0 [ 40.846438][ T50] kobject_add_varg+0x9c/0xe8 [ 40.846445][ T50] kobject_add+0x110/0x1c8 [ 40.846451][ T50] device_add+0x394/0x9e0 [ 40.846458][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.846468][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.846476][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.846484][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.846494][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.846502][ T50] hci_rx_work+0x2f4/0xd78 [ 40.846509][ T50] process_scheduled_works+0x788/0x10b8 [ 40.846518][ T50] worker_thread+0x798/0xbd0 [ 40.846526][ T50] kthread+0x304/0x3d4 [ 40.846534][ T50] ret_from_fork+0x10/0x20 [ 40.846545][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.846557][ T50] Bluetooth: hci0: failed to register connection device [ 40.857294][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.857306][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.857315][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.857320][ T50] Workqueue: hci0 hci_rx_work [ 40.857333][ T50] Call trace: [ 40.857336][ T50] show_stack+0x2c/0x3c (C) [ 40.857351][ T50] __dump_stack+0x30/0x40 [ 40.857363][ T50] dump_stack_lvl+0xd8/0x12c [ 40.857373][ T50] dump_stack+0x1c/0x28 [ 40.857383][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.857393][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.857403][ T50] kobject_add_internal+0x290/0x6f0 [ 40.857412][ T50] kobject_add_varg+0x9c/0xe8 [ 40.857419][ T50] kobject_add+0x110/0x1c8 [ 40.857425][ T50] device_add+0x394/0x9e0 [ 40.857433][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.857443][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.857451][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.857459][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.857468][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.857477][ T50] hci_rx_work+0x2f4/0xd78 [ 40.857484][ T50] process_scheduled_works+0x788/0x10b8 [ 40.857493][ T50] worker_thread+0x798/0xbd0 [ 40.857501][ T50] kthread+0x304/0x3d4 [ 40.857509][ T50] ret_from_fork+0x10/0x20 [ 40.857521][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.857533][ T50] Bluetooth: hci0: failed to register connection device [ 40.868631][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.868643][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.868652][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.868657][ T50] Workqueue: hci0 hci_rx_work [ 40.868668][ T50] Call trace: [ 40.868671][ T50] show_stack+0x2c/0x3c (C) [ 40.868684][ T50] __dump_stack+0x30/0x40 [ 40.868694][ T50] dump_stack_lvl+0xd8/0x12c [ 40.868704][ T50] dump_stack+0x1c/0x28 [ 40.868713][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.868723][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.868732][ T50] kobject_add_internal+0x290/0x6f0 [ 40.868741][ T50] kobject_add_varg+0x9c/0xe8 [ 40.868748][ T50] kobject_add+0x110/0x1c8 [ 40.868754][ T50] device_add+0x394/0x9e0 [ 40.868762][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.868771][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.868779][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.868788][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.868797][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.868805][ T50] hci_rx_work+0x2f4/0xd78 [ 40.868812][ T50] process_scheduled_works+0x788/0x10b8 [ 40.868821][ T50] worker_thread+0x798/0xbd0 [ 40.868829][ T50] kthread+0x304/0x3d4 [ 40.868837][ T50] ret_from_fork+0x10/0x20 [ 40.868849][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.868860][ T50] Bluetooth: hci0: failed to register connection device [ 40.876288][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.876298][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.876308][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.876312][ T50] Workqueue: hci0 hci_rx_work [ 40.876323][ T50] Call trace: [ 40.876325][ T50] show_stack+0x2c/0x3c (C) [ 40.876338][ T50] __dump_stack+0x30/0x40 [ 40.876348][ T50] dump_stack_lvl+0xd8/0x12c [ 40.876358][ T50] dump_stack+0x1c/0x28 [ 40.876367][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.876377][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.876386][ T50] kobject_add_internal+0x290/0x6f0 [ 40.876394][ T50] kobject_add_varg+0x9c/0xe8 [ 40.876401][ T50] kobject_add+0x110/0x1c8 [ 40.876408][ T50] device_add+0x394/0x9e0 [ 40.876415][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.876424][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.876432][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.876440][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.876450][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.876458][ T50] hci_rx_work+0x2f4/0xd78 [ 40.876465][ T50] process_scheduled_works+0x788/0x10b8 [ 40.876474][ T50] worker_thread+0x798/0xbd0 [ 40.876482][ T50] kthread+0x304/0x3d4 [ 40.876490][ T50] ret_from_fork+0x10/0x20 [ 40.876502][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.876513][ T50] Bluetooth: hci0: failed to register connection device [ 40.887363][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.887375][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.887385][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.887390][ T50] Workqueue: hci0 hci_rx_work [ 40.887403][ T50] Call trace: [ 40.887406][ T50] show_stack+0x2c/0x3c (C) [ 40.887419][ T50] __dump_stack+0x30/0x40 [ 40.887430][ T50] dump_stack_lvl+0xd8/0x12c [ 40.887440][ T50] dump_stack+0x1c/0x28 [ 40.887450][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.887460][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.887470][ T50] kobject_add_internal+0x290/0x6f0 [ 40.887478][ T50] kobject_add_varg+0x9c/0xe8 [ 40.887485][ T50] kobject_add+0x110/0x1c8 [ 40.887492][ T50] device_add+0x394/0x9e0 [ 40.887500][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.887509][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.887518][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.887526][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.887535][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.887544][ T50] hci_rx_work+0x2f4/0xd78 [ 40.887550][ T50] process_scheduled_works+0x788/0x10b8 [ 40.887559][ T50] worker_thread+0x798/0xbd0 [ 40.887568][ T50] kthread+0x304/0x3d4 [ 40.887575][ T50] ret_from_fork+0x10/0x20 [ 40.887587][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.887600][ T50] Bluetooth: hci0: failed to register connection device [ 40.896993][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.897005][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.897014][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.897019][ T50] Workqueue: hci0 hci_rx_work [ 40.897031][ T50] Call trace: [ 40.897034][ T50] show_stack+0x2c/0x3c (C) [ 40.897047][ T50] __dump_stack+0x30/0x40 [ 40.897057][ T50] dump_stack_lvl+0xd8/0x12c [ 40.897067][ T50] dump_stack+0x1c/0x28 [ 40.897076][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.897086][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.897095][ T50] kobject_add_internal+0x290/0x6f0 [ 40.897104][ T50] kobject_add_varg+0x9c/0xe8 [ 40.897119][ T50] kobject_add+0x110/0x1c8 [ 40.897126][ T50] device_add+0x394/0x9e0 [ 40.897134][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.897143][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.897152][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.897161][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.897170][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.897178][ T50] hci_rx_work+0x2f4/0xd78 [ 40.897185][ T50] process_scheduled_works+0x788/0x10b8 [ 40.897194][ T50] worker_thread+0x798/0xbd0 [ 40.897202][ T50] kthread+0x304/0x3d4 [ 40.897210][ T50] ret_from_fork+0x10/0x20 [ 40.897223][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.897234][ T50] Bluetooth: hci0: failed to register connection device [ 40.906922][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.906935][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.906947][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.906953][ T50] Workqueue: hci0 hci_rx_work [ 40.906966][ T50] Call trace: [ 40.906969][ T50] show_stack+0x2c/0x3c (C) [ 40.906983][ T50] __dump_stack+0x30/0x40 [ 40.906993][ T50] dump_stack_lvl+0xd8/0x12c [ 40.907003][ T50] dump_stack+0x1c/0x28 [ 40.907013][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.907023][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.907033][ T50] kobject_add_internal+0x290/0x6f0 [ 40.907042][ T50] kobject_add_varg+0x9c/0xe8 [ 40.907049][ T50] kobject_add+0x110/0x1c8 [ 40.907055][ T50] device_add+0x394/0x9e0 [ 40.907063][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.907072][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.907081][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.907089][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.907098][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.907106][ T50] hci_rx_work+0x2f4/0xd78 [ 40.907122][ T50] process_scheduled_works+0x788/0x10b8 [ 40.907132][ T50] worker_thread+0x798/0xbd0 [ 40.907141][ T50] kthread+0x304/0x3d4 [ 40.907149][ T50] ret_from_fork+0x10/0x20 [ 40.907164][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.907176][ T50] Bluetooth: hci0: failed to register connection device [ 40.915486][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.915497][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.915507][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.915512][ T50] Workqueue: hci0 hci_rx_work [ 40.915524][ T50] Call trace: [ 40.915526][ T50] show_stack+0x2c/0x3c (C) [ 40.915539][ T50] __dump_stack+0x30/0x40 [ 40.915549][ T50] dump_stack_lvl+0xd8/0x12c [ 40.915559][ T50] dump_stack+0x1c/0x28 [ 40.915568][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.915578][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.915588][ T50] kobject_add_internal+0x290/0x6f0 [ 40.915596][ T50] kobject_add_varg+0x9c/0xe8 [ 40.915603][ T50] kobject_add+0x110/0x1c8 [ 40.915610][ T50] device_add+0x394/0x9e0 [ 40.915617][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.915627][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.915636][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.915644][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.915653][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.915661][ T50] hci_rx_work+0x2f4/0xd78 [ 40.915668][ T50] process_scheduled_works+0x788/0x10b8 [ 40.915677][ T50] worker_thread+0x798/0xbd0 [ 40.915685][ T50] kthread+0x304/0x3d4 [ 40.915693][ T50] ret_from_fork+0x10/0x20 [ 40.915705][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.915715][ T50] Bluetooth: hci0: failed to register connection device [ 40.924981][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.924993][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.925002][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.925007][ T50] Workqueue: hci0 hci_rx_work [ 40.925019][ T50] Call trace: [ 40.925022][ T50] show_stack+0x2c/0x3c (C) [ 40.925035][ T50] __dump_stack+0x30/0x40 [ 40.925046][ T50] dump_stack_lvl+0xd8/0x12c [ 40.925056][ T50] dump_stack+0x1c/0x28 [ 40.925065][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.925076][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.925085][ T50] kobject_add_internal+0x290/0x6f0 [ 40.925094][ T50] kobject_add_varg+0x9c/0xe8 [ 40.925101][ T50] kobject_add+0x110/0x1c8 [ 40.925116][ T50] device_add+0x394/0x9e0 [ 40.925124][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.925135][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.925144][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.925152][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.925162][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.925170][ T50] hci_rx_work+0x2f4/0xd78 [ 40.925177][ T50] process_scheduled_works+0x788/0x10b8 [ 40.925186][ T50] worker_thread+0x798/0xbd0 [ 40.925194][ T50] kthread+0x304/0x3d4 [ 40.925202][ T50] ret_from_fork+0x10/0x20 [ 40.925214][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.925225][ T50] Bluetooth: hci0: failed to register connection device [ 40.932559][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.932569][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.932579][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.932584][ T50] Workqueue: hci0 hci_rx_work [ 40.932595][ T50] Call trace: [ 40.932597][ T50] show_stack+0x2c/0x3c (C) [ 40.932611][ T50] __dump_stack+0x30/0x40 [ 40.932622][ T50] dump_stack_lvl+0xd8/0x12c [ 40.932631][ T50] dump_stack+0x1c/0x28 [ 40.932641][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.932651][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.932661][ T50] kobject_add_internal+0x290/0x6f0 [ 40.932669][ T50] kobject_add_varg+0x9c/0xe8 [ 40.932676][ T50] kobject_add+0x110/0x1c8 [ 40.932683][ T50] device_add+0x394/0x9e0 [ 40.932690][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.932700][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.932709][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.932717][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.932727][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.932735][ T50] hci_rx_work+0x2f4/0xd78 [ 40.932742][ T50] process_scheduled_works+0x788/0x10b8 [ 40.932751][ T50] worker_thread+0x798/0xbd0 [ 40.932759][ T50] kthread+0x304/0x3d4 [ 40.932767][ T50] ret_from_fork+0x10/0x20 [ 40.932778][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.932790][ T50] Bluetooth: hci0: failed to register connection device [ 40.939375][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.939385][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.939395][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.939400][ T50] Workqueue: hci0 hci_rx_work [ 40.939410][ T50] Call trace: [ 40.939413][ T50] show_stack+0x2c/0x3c (C) [ 40.939425][ T50] __dump_stack+0x30/0x40 [ 40.939435][ T50] dump_stack_lvl+0xd8/0x12c [ 40.939445][ T50] dump_stack+0x1c/0x28 [ 40.939454][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.939464][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.939474][ T50] kobject_add_internal+0x290/0x6f0 [ 40.939482][ T50] kobject_add_varg+0x9c/0xe8 [ 40.939489][ T50] kobject_add+0x110/0x1c8 [ 40.939496][ T50] device_add+0x394/0x9e0 [ 40.939503][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.939512][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.939520][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.939528][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.939537][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.939546][ T50] hci_rx_work+0x2f4/0xd78 [ 40.939553][ T50] process_scheduled_works+0x788/0x10b8 [ 40.939562][ T50] worker_thread+0x798/0xbd0 [ 40.939570][ T50] kthread+0x304/0x3d4 [ 40.939577][ T50] ret_from_fork+0x10/0x20 [ 40.939589][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.939600][ T50] Bluetooth: hci0: failed to register connection device [ 40.948708][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.948719][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.948728][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.948733][ T50] Workqueue: hci0 hci_rx_work [ 40.948744][ T50] Call trace: [ 40.948747][ T50] show_stack+0x2c/0x3c (C) [ 40.948759][ T50] __dump_stack+0x30/0x40 [ 40.948770][ T50] dump_stack_lvl+0xd8/0x12c [ 40.948779][ T50] dump_stack+0x1c/0x28 [ 40.948789][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.948799][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.948808][ T50] kobject_add_internal+0x290/0x6f0 [ 40.948817][ T50] kobject_add_varg+0x9c/0xe8 [ 40.948824][ T50] kobject_add+0x110/0x1c8 [ 40.948831][ T50] device_add+0x394/0x9e0 [ 40.948838][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.948847][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.948856][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.948864][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.948873][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.948881][ T50] hci_rx_work+0x2f4/0xd78 [ 40.948888][ T50] process_scheduled_works+0x788/0x10b8 [ 40.948897][ T50] worker_thread+0x798/0xbd0 [ 40.948905][ T50] kthread+0x304/0x3d4 [ 40.948913][ T50] ret_from_fork+0x10/0x20 [ 40.948925][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.948936][ T50] Bluetooth: hci0: failed to register connection device [ 40.958875][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.958887][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.958897][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.958902][ T50] Workqueue: hci0 hci_rx_work [ 40.958913][ T50] Call trace: [ 40.958916][ T50] show_stack+0x2c/0x3c (C) [ 40.958928][ T50] __dump_stack+0x30/0x40 [ 40.958939][ T50] dump_stack_lvl+0xd8/0x12c [ 40.958948][ T50] dump_stack+0x1c/0x28 [ 40.958958][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.958967][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.958977][ T50] kobject_add_internal+0x290/0x6f0 [ 40.958985][ T50] kobject_add_varg+0x9c/0xe8 [ 40.958992][ T50] kobject_add+0x110/0x1c8 [ 40.958999][ T50] device_add+0x394/0x9e0 [ 40.959007][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.959016][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.959024][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.959032][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.959041][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.959050][ T50] hci_rx_work+0x2f4/0xd78 [ 40.959056][ T50] process_scheduled_works+0x788/0x10b8 [ 40.959066][ T50] worker_thread+0x798/0xbd0 [ 40.959074][ T50] kthread+0x304/0x3d4 [ 40.959081][ T50] ret_from_fork+0x10/0x20 [ 40.959093][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.959104][ T50] Bluetooth: hci0: failed to register connection device [ 40.968582][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 40.968593][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 40.968603][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 40.968607][ T50] Workqueue: hci0 hci_rx_work [ 40.968619][ T50] Call trace: [ 40.968621][ T50] show_stack+0x2c/0x3c (C) [ 40.968635][ T50] __dump_stack+0x30/0x40 [ 40.968645][ T50] dump_stack_lvl+0xd8/0x12c [ 40.968654][ T50] dump_stack+0x1c/0x28 [ 40.968664][ T50] sysfs_warn_dup+0x9c/0xb8 [ 40.968674][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 40.968683][ T50] kobject_add_internal+0x290/0x6f0 [ 40.968691][ T50] kobject_add_varg+0x9c/0xe8 [ 40.968698][ T50] kobject_add+0x110/0x1c8 [ 40.968705][ T50] device_add+0x394/0x9e0 [ 40.968712][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 40.968722][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 40.968730][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 40.968738][ T50] hci_le_meta_evt+0x2b0/0x46c [ 40.968747][ T50] hci_event_packet+0x4c0/0x9c8 [ 40.968756][ T50] hci_rx_work+0x2f4/0xd78 [ 40.968762][ T50] process_scheduled_works+0x788/0x10b8 [ 40.968771][ T50] worker_thread+0x798/0xbd0 [ 40.968780][ T50] kthread+0x304/0x3d4 [ 40.968787][ T50] ret_from_fork+0x10/0x20 [ 40.968799][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 40.968810][ T50] Bluetooth: hci0: failed to register connection device [ 40.972267][ T50] ------------[ cut here ]------------ [ 40.972274][ T50] WARNING: net/bluetooth/hci_conn.c:631 at hci_conn_timeout+0xfc/0x20c, CPU#1: kworker/u9:0/50 [ 41.770516][ T4768] Bluetooth: hci1: command tx timeout [ 43.870177][ T4768] Bluetooth: hci1: command tx timeout [ 44.542907][ T50] Modules linked in: [ 44.543573][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT [ 44.545046][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 44.546724][ T50] Workqueue: hci0 hci_conn_timeout [ 44.547603][ T50] pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) [ 44.548915][ T50] pc : hci_conn_timeout+0xfc/0x20c [ 44.549745][ T50] lr : hci_conn_timeout+0xfc/0x20c [ 44.550599][ T50] sp : ffff800090247b20 [ 44.551303][ T50] x29: ffff800090247b20 x28: 1fffe0001862c090 x27: 0000000000000000 [ 44.552707][ T50] x26: ffff0000c2dd0958 x25: ffff0000f0590a40 x24: 1fffe0001c11bb81 [ 44.554129][ T50] x23: ffff0000c3160000 x22: dfff800000000000 x21: 00000000ffffffff [ 44.555522][ T50] x20: ffff0000f0590a40 x19: ffff0000f0590000 x18: 00000000ffffffff [ 44.556927][ T50] x17: ffff80008a791000 x16: 0000000000000002 x15: ffff80008a31ada0 [ 44.558355][ T50] x14: ffff80008a590e28 x13: 0000000000000001 x12: 0000000000000000 [ 44.559746][ T50] x11: 0000000000000000 x10: ffff60001e0b2003 x9 : 0000000000000000 [ 44.561134][ T50] x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000 [ 44.562564][ T50] x5 : ffff80008a7af5c8 x4 : 0000000000000008 x3 : ffff800085b2ea58 [ 44.563997][ T50] x2 : 00000000ffffffff x1 : ffff0000c3160000 x0 : 0000000000000000 [ 44.565384][ T50] Call trace: [ 44.565954][ T50] hci_conn_timeout+0xfc/0x20c (P) [ 44.566894][ T50] process_scheduled_works+0x788/0x10b8 [ 44.567838][ T50] worker_thread+0x798/0xbd0 [ 44.568611][ T50] kthread+0x304/0x3d4 [ 44.569309][ T50] ret_from_fork+0x10/0x20 [ 44.570049][ T50] irq event stamp: 27318 [ 44.570782][ T50] hardirqs last enabled at (27317): [] _raw_spin_unlock_irq+0x30/0x80 [ 44.572452][ T50] hardirqs last disabled at (27318): [] el1_brk64+0x20/0x54 [ 44.573932][ T50] softirqs last enabled at (27232): [] __alloc_skb+0x1c0/0x610 [ 44.575512][ T50] softirqs last disabled at (27230): [] __alloc_skb+0x1a8/0x610 [ 44.577087][ T50] ---[ end trace 0000000000000000 ]--- [ 44.578941][ T4768] Bluetooth: hci2: command tx timeout [ 44.580391][ T4856] Bluetooth: hci3: command tx timeout [ 44.580423][ T4856] Bluetooth: hci4: command tx timeout 1970/01/01 00:00:44 executed programs: 231 [ 44.592053][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 44.592095][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 44.592119][ T50] Tainted: [W]=WARN [ 44.592123][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 44.592130][ T50] Workqueue: hci0 hci_rx_work [ 44.592147][ T50] Call trace: [ 44.592151][ T50] show_stack+0x2c/0x3c (C) [ 44.592167][ T50] __dump_stack+0x30/0x40 [ 44.592177][ T50] dump_stack_lvl+0xd8/0x12c [ 44.592187][ T50] dump_stack+0x1c/0x28 [ 44.592197][ T50] sysfs_warn_dup+0x9c/0xb8 [ 44.592208][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 44.592217][ T50] kobject_add_internal+0x290/0x6f0 [ 44.592226][ T50] kobject_add_varg+0x9c/0xe8 [ 44.592233][ T50] kobject_add+0x110/0x1c8 [ 44.592239][ T50] device_add+0x394/0x9e0 [ 44.592247][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 44.592257][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 44.592265][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 44.592273][ T50] hci_le_meta_evt+0x2b0/0x46c [ 44.592282][ T50] hci_event_packet+0x4c0/0x9c8 [ 44.592291][ T50] hci_rx_work+0x2f4/0xd78 [ 44.592298][ T50] process_scheduled_works+0x788/0x10b8 [ 44.592307][ T50] worker_thread+0x798/0xbd0 [ 44.592316][ T50] kthread+0x304/0x3d4 [ 44.592323][ T50] ret_from_fork+0x10/0x20 [ 44.592336][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 44.592347][ T50] Bluetooth: hci0: failed to register connection device [ 44.592475][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 44.592482][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 44.592492][ T50] Tainted: [W]=WARN [ 44.592494][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 44.592498][ T50] Workqueue: hci0 hci_rx_work [ 44.592505][ T50] Call trace: [ 44.592507][ T50] show_stack+0x2c/0x3c (C) [ 44.592517][ T50] __dump_stack+0x30/0x40 [ 44.592527][ T50] dump_stack_lvl+0xd8/0x12c [ 44.592536][ T50] dump_stack+0x1c/0x28 [ 44.592545][ T50] sysfs_warn_dup+0x9c/0xb8 [ 44.592554][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 44.592564][ T50] kobject_add_internal+0x290/0x6f0 [ 44.592571][ T50] kobject_add_varg+0x9c/0xe8 [ 44.592578][ T50] kobject_add+0x110/0x1c8 [ 44.592585][ T50] device_add+0x394/0x9e0 [ 44.592592][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 44.592601][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 44.592609][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 44.592618][ T50] hci_le_meta_evt+0x2b0/0x46c [ 44.592627][ T50] hci_event_packet+0x4c0/0x9c8 [ 44.592635][ T50] hci_rx_work+0x2f4/0xd78 [ 44.592642][ T50] process_scheduled_works+0x788/0x10b8 [ 44.592650][ T50] worker_thread+0x798/0xbd0 [ 44.592659][ T50] kthread+0x304/0x3d4 [ 44.592666][ T50] ret_from_fork+0x10/0x20 [ 44.592677][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 44.592687][ T50] Bluetooth: hci0: failed to register connection device [ 44.592788][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 44.592794][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 44.592803][ T50] Tainted: [W]=WARN [ 44.592805][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 44.592809][ T50] Workqueue: hci0 hci_rx_work [ 44.592815][ T50] Call trace: [ 44.592818][ T50] show_stack+0x2c/0x3c (C) [ 44.592827][ T50] __dump_stack+0x30/0x40 [ 44.592837][ T50] dump_stack_lvl+0xd8/0x12c [ 44.592846][ T50] dump_stack+0x1c/0x28 [ 44.592855][ T50] sysfs_warn_dup+0x9c/0xb8 [ 44.592864][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 44.592874][ T50] kobject_add_internal+0x290/0x6f0 [ 44.592881][ T50] kobject_add_varg+0x9c/0xe8 [ 44.592888][ T50] kobject_add+0x110/0x1c8 [ 44.592895][ T50] device_add+0x394/0x9e0 [ 44.592901][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 44.592910][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 44.592918][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 44.592926][ T50] hci_le_meta_evt+0x2b0/0x46c [ 44.592935][ T50] hci_event_packet+0x4c0/0x9c8 [ 44.592944][ T50] hci_rx_work+0x2f4/0xd78 [ 44.592951][ T50] process_scheduled_works+0x788/0x10b8 [ 44.592959][ T50] worker_thread+0x798/0xbd0 [ 44.592968][ T50] kthread+0x304/0x3d4 [ 44.592975][ T50] ret_from_fork+0x10/0x20 [ 44.592986][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 44.592995][ T50] Bluetooth: hci0: failed to register connection device [ 44.593103][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 44.593114][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 44.593123][ T50] Tainted: [W]=WARN [ 44.593125][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 44.593129][ T50] Workqueue: hci0 hci_rx_work [ 44.593135][ T50] Call trace: [ 44.593137][ T50] show_stack+0x2c/0x3c (C) [ 44.593147][ T50] __dump_stack+0x30/0x40 [ 44.593157][ T50] dump_stack_lvl+0xd8/0x12c [ 44.593166][ T50] dump_stack+0x1c/0x28 [ 44.593176][ T50] sysfs_warn_dup+0x9c/0xb8 [ 44.593185][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 44.593194][ T50] kobject_add_internal+0x290/0x6f0 [ 44.593202][ T50] kobject_add_varg+0x9c/0xe8 [ 44.593209][ T50] kobject_add+0x110/0x1c8 [ 44.593215][ T50] device_add+0x394/0x9e0 [ 44.593222][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 44.593231][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 44.593239][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 44.593247][ T50] hci_le_meta_evt+0x2b0/0x46c [ 44.593256][ T50] hci_event_packet+0x4c0/0x9c8 [ 44.593264][ T50] hci_rx_work+0x2f4/0xd78 [ 44.593271][ T50] process_scheduled_works+0x788/0x10b8 [ 44.593279][ T50] worker_thread+0x798/0xbd0 [ 44.593288][ T50] kthread+0x304/0x3d4 [ 44.593295][ T50] ret_from_fork+0x10/0x20 [ 44.593306][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 44.593315][ T50] Bluetooth: hci0: failed to register connection device [ 44.593350][ T50] Bluetooth: hci0: command 0x041b tx timeout [ 44.597925][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 44.597937][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 44.597950][ T50] Tainted: [W]=WARN [ 44.597953][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 44.597958][ T50] Workqueue: hci0 hci_rx_work [ 44.597967][ T50] Call trace: [ 44.597970][ T50] show_stack+0x2c/0x3c (C) [ 44.597981][ T50] __dump_stack+0x30/0x40 [ 44.597991][ T50] dump_stack_lvl+0xd8/0x12c [ 44.598001][ T50] dump_stack+0x1c/0x28 [ 44.598010][ T50] sysfs_warn_dup+0x9c/0xb8 [ 44.598020][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 44.598029][ T50] kobject_add_internal+0x290/0x6f0 [ 44.598037][ T50] kobject_add_varg+0x9c/0xe8 [ 44.598044][ T50] kobject_add+0x110/0x1c8 [ 44.598051][ T50] device_add+0x394/0x9e0 [ 44.598058][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 44.598067][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 44.598075][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 44.598083][ T50] hci_le_meta_evt+0x2b0/0x46c [ 44.598093][ T50] hci_event_packet+0x4c0/0x9c8 [ 44.598101][ T50] hci_rx_work+0x2f4/0xd78 [ 44.598113][ T50] process_scheduled_works+0x788/0x10b8 [ 44.598123][ T50] worker_thread+0x798/0xbd0 [ 44.598133][ T50] kthread+0x304/0x3d4 [ 44.598141][ T50] ret_from_fork+0x10/0x20 [ 44.598156][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 44.598169][ T50] Bluetooth: hci0: failed to register connection device [ 44.615015][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 44.615030][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 44.615043][ T50] Tainted: [W]=WARN [ 44.615046][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 44.615052][ T50] Workqueue: hci0 hci_rx_work [ 44.615065][ T50] Call trace: [ 44.615068][ T50] show_stack+0x2c/0x3c (C) [ 44.615082][ T50] __dump_stack+0x30/0x40 [ 44.615093][ T50] dump_stack_lvl+0xd8/0x12c [ 44.615103][ T50] dump_stack+0x1c/0x28 [ 44.615118][ T50] sysfs_warn_dup+0x9c/0xb8 [ 44.615129][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 44.615140][ T50] kobject_add_internal+0x290/0x6f0 [ 44.615149][ T50] kobject_add_varg+0x9c/0xe8 [ 44.615156][ T50] kobject_add+0x110/0x1c8 [ 44.615164][ T50] device_add+0x394/0x9e0 [ 44.615171][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 44.615181][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 44.615189][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 44.615198][ T50] hci_le_meta_evt+0x2b0/0x46c [ 44.615207][ T50] hci_event_packet+0x4c0/0x9c8 [ 44.615215][ T50] hci_rx_work+0x2f4/0xd78 [ 44.615222][ T50] process_scheduled_works+0x788/0x10b8 [ 44.615232][ T50] worker_thread+0x798/0xbd0 [ 44.615240][ T50] kthread+0x304/0x3d4 [ 44.615248][ T50] ret_from_fork+0x10/0x20 [ 44.615261][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 44.615273][ T50] Bluetooth: hci0: failed to register connection device [ 44.642625][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 44.642641][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 44.642652][ T50] Tainted: [W]=WARN [ 44.642655][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 44.642660][ T50] Workqueue: hci0 hci_rx_work [ 44.642673][ T50] Call trace: [ 44.642676][ T50] show_stack+0x2c/0x3c (C) [ 44.642691][ T50] __dump_stack+0x30/0x40 [ 44.642701][ T50] dump_stack_lvl+0xd8/0x12c [ 44.642711][ T50] dump_stack+0x1c/0x28 [ 44.642720][ T50] sysfs_warn_dup+0x9c/0xb8 [ 44.642730][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 44.642740][ T50] kobject_add_internal+0x290/0x6f0 [ 44.642749][ T50] kobject_add_varg+0x9c/0xe8 [ 44.642755][ T50] kobject_add+0x110/0x1c8 [ 44.642762][ T50] device_add+0x394/0x9e0 [ 44.642770][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 44.642779][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 44.642788][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 44.642796][ T50] hci_le_meta_evt+0x2b0/0x46c [ 44.642806][ T50] hci_event_packet+0x4c0/0x9c8 [ 44.642814][ T50] hci_rx_work+0x2f4/0xd78 [ 44.642821][ T50] process_scheduled_works+0x788/0x10b8 [ 44.642830][ T50] worker_thread+0x798/0xbd0 [ 44.642839][ T50] kthread+0x304/0x3d4 [ 44.642846][ T50] ret_from_fork+0x10/0x20 [ 44.642859][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 44.642870][ T50] Bluetooth: hci0: failed to register connection device [ 44.655171][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 44.655188][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 44.655200][ T50] Tainted: [W]=WARN [ 44.655203][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 44.655208][ T50] Workqueue: hci0 hci_rx_work [ 44.655221][ T50] Call trace: [ 44.655223][ T50] show_stack+0x2c/0x3c (C) [ 44.655237][ T50] __dump_stack+0x30/0x40 [ 44.655247][ T50] dump_stack_lvl+0xd8/0x12c [ 44.655257][ T50] dump_stack+0x1c/0x28 [ 44.655266][ T50] sysfs_warn_dup+0x9c/0xb8 [ 44.655276][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 44.655286][ T50] kobject_add_internal+0x290/0x6f0 [ 44.655295][ T50] kobject_add_varg+0x9c/0xe8 [ 44.655302][ T50] kobject_add+0x110/0x1c8 [ 44.655308][ T50] device_add+0x394/0x9e0 [ 44.655316][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 44.655325][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 44.655334][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 44.655342][ T50] hci_le_meta_evt+0x2b0/0x46c [ 44.655351][ T50] hci_event_packet+0x4c0/0x9c8 [ 44.655359][ T50] hci_rx_work+0x2f4/0xd78 [ 44.655366][ T50] process_scheduled_works+0x788/0x10b8 [ 44.655375][ T50] worker_thread+0x798/0xbd0 [ 44.655384][ T50] kthread+0x304/0x3d4 [ 44.655391][ T50] ret_from_fork+0x10/0x20 [ 44.655404][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 44.655415][ T50] Bluetooth: hci0: failed to register connection device [ 44.658966][ T306] bridge_slave_1: left allmulticast mode [ 44.658999][ T306] bridge_slave_1: left promiscuous mode [ 44.659389][ T306] bridge0: port 2(bridge_slave_1) entered disabled state [ 44.669500][ T306] bridge_slave_0: left allmulticast mode [ 44.669515][ T306] bridge_slave_0: left promiscuous mode [ 44.669583][ T306] bridge0: port 1(bridge_slave_0) entered disabled state [ 44.678862][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 44.678876][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 44.678887][ T50] Tainted: [W]=WARN [ 44.678890][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 44.678895][ T50] Workqueue: hci0 hci_rx_work [ 44.678908][ T50] Call trace: [ 44.678911][ T50] show_stack+0x2c/0x3c (C) [ 44.678925][ T50] __dump_stack+0x30/0x40 [ 44.678936][ T50] dump_stack_lvl+0xd8/0x12c [ 44.678946][ T50] dump_stack+0x1c/0x28 [ 44.678955][ T50] sysfs_warn_dup+0x9c/0xb8 [ 44.678965][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 44.678975][ T50] kobject_add_internal+0x290/0x6f0 [ 44.678984][ T50] kobject_add_varg+0x9c/0xe8 [ 44.678991][ T50] kobject_add+0x110/0x1c8 [ 44.678997][ T50] device_add+0x394/0x9e0 [ 44.679005][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 44.679015][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 44.679023][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 44.679032][ T50] hci_le_meta_evt+0x2b0/0x46c [ 44.679041][ T50] hci_event_packet+0x4c0/0x9c8 [ 44.679049][ T50] hci_rx_work+0x2f4/0xd78 [ 44.679056][ T50] process_scheduled_works+0x788/0x10b8 [ 44.679065][ T50] worker_thread+0x798/0xbd0 [ 44.679073][ T50] kthread+0x304/0x3d4 [ 44.679081][ T50] ret_from_fork+0x10/0x20 [ 44.679093][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 44.679104][ T50] Bluetooth: hci0: failed to register connection device [ 44.695796][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 44.695811][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 44.695823][ T50] Tainted: [W]=WARN [ 44.695826][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 44.695831][ T50] Workqueue: hci0 hci_rx_work [ 44.695844][ T50] Call trace: [ 44.695847][ T50] show_stack+0x2c/0x3c (C) [ 44.695861][ T50] __dump_stack+0x30/0x40 [ 44.695873][ T50] dump_stack_lvl+0xd8/0x12c [ 44.695882][ T50] dump_stack+0x1c/0x28 [ 44.695892][ T50] sysfs_warn_dup+0x9c/0xb8 [ 44.695903][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 44.695912][ T50] kobject_add_internal+0x290/0x6f0 [ 44.695922][ T50] kobject_add_varg+0x9c/0xe8 [ 44.695929][ T50] kobject_add+0x110/0x1c8 [ 44.695935][ T50] device_add+0x394/0x9e0 [ 44.695943][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 44.695952][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 44.695961][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 44.695969][ T50] hci_le_meta_evt+0x2b0/0x46c [ 44.695978][ T50] hci_event_packet+0x4c0/0x9c8 [ 44.695986][ T50] hci_rx_work+0x2f4/0xd78 [ 44.695993][ T50] process_scheduled_works+0x788/0x10b8 [ 44.696002][ T50] worker_thread+0x798/0xbd0 [ 44.696011][ T50] kthread+0x304/0x3d4 [ 44.696018][ T50] ret_from_fork+0x10/0x20 [ 44.696030][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 44.696041][ T50] Bluetooth: hci0: failed to register connection device [ 44.709387][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 44.709401][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 44.709413][ T50] Tainted: [W]=WARN [ 44.709416][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 44.709421][ T50] Workqueue: hci0 hci_rx_work [ 44.709434][ T50] Call trace: [ 44.709437][ T50] show_stack+0x2c/0x3c (C) [ 44.709451][ T50] __dump_stack+0x30/0x40 [ 44.709461][ T50] dump_stack_lvl+0xd8/0x12c [ 44.709471][ T50] dump_stack+0x1c/0x28 [ 44.709480][ T50] sysfs_warn_dup+0x9c/0xb8 [ 44.709491][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 44.709500][ T50] kobject_add_internal+0x290/0x6f0 [ 44.709509][ T50] kobject_add_varg+0x9c/0xe8 [ 44.709517][ T50] kobject_add+0x110/0x1c8 [ 44.709523][ T50] device_add+0x394/0x9e0 [ 44.709531][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 44.709540][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 44.709548][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 44.709556][ T50] hci_le_meta_evt+0x2b0/0x46c [ 44.709566][ T50] hci_event_packet+0x4c0/0x9c8 [ 44.709574][ T50] hci_rx_work+0x2f4/0xd78 [ 44.709581][ T50] process_scheduled_works+0x788/0x10b8 [ 44.709590][ T50] worker_thread+0x798/0xbd0 [ 44.709598][ T50] kthread+0x304/0x3d4 [ 44.709606][ T50] ret_from_fork+0x10/0x20 [ 44.709620][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 44.709632][ T50] Bluetooth: hci0: failed to register connection device [ 44.727872][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 44.727890][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 44.727903][ T50] Tainted: [W]=WARN [ 44.727906][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 44.727911][ T50] Workqueue: hci0 hci_rx_work [ 44.727925][ T50] Call trace: [ 44.727928][ T50] show_stack+0x2c/0x3c (C) [ 44.727945][ T50] __dump_stack+0x30/0x40 [ 44.727959][ T50] dump_stack_lvl+0xd8/0x12c [ 44.727968][ T50] dump_stack+0x1c/0x28 [ 44.727978][ T50] sysfs_warn_dup+0x9c/0xb8 [ 44.727991][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 44.728000][ T50] kobject_add_internal+0x290/0x6f0 [ 44.728016][ T50] kobject_add_varg+0x9c/0xe8 [ 44.728024][ T50] kobject_add+0x110/0x1c8 [ 44.728031][ T50] device_add+0x394/0x9e0 [ 44.728039][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 44.728052][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 44.728062][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 44.728071][ T50] hci_le_meta_evt+0x2b0/0x46c [ 44.728081][ T50] hci_event_packet+0x4c0/0x9c8 [ 44.728090][ T50] hci_rx_work+0x2f4/0xd78 [ 44.728097][ T50] process_scheduled_works+0x788/0x10b8 [ 44.728107][ T50] worker_thread+0x798/0xbd0 [ 44.728121][ T50] kthread+0x304/0x3d4 [ 44.728131][ T50] ret_from_fork+0x10/0x20 [ 44.728165][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 44.728182][ T50] Bluetooth: hci0: failed to register connection device [ 44.744030][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 44.744045][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 44.744056][ T50] Tainted: [W]=WARN [ 44.744060][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 44.744064][ T50] Workqueue: hci0 hci_rx_work [ 44.744077][ T50] Call trace: [ 44.744080][ T50] show_stack+0x2c/0x3c (C) [ 44.744093][ T50] __dump_stack+0x30/0x40 [ 44.744104][ T50] dump_stack_lvl+0xd8/0x12c [ 44.744121][ T50] dump_stack+0x1c/0x28 [ 44.744131][ T50] sysfs_warn_dup+0x9c/0xb8 [ 44.744142][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 44.744151][ T50] kobject_add_internal+0x290/0x6f0 [ 44.744160][ T50] kobject_add_varg+0x9c/0xe8 [ 44.744167][ T50] kobject_add+0x110/0x1c8 [ 44.744174][ T50] device_add+0x394/0x9e0 [ 44.744181][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 44.744191][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 44.744199][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 44.744207][ T50] hci_le_meta_evt+0x2b0/0x46c [ 44.744217][ T50] hci_event_packet+0x4c0/0x9c8 [ 44.744225][ T50] hci_rx_work+0x2f4/0xd78 [ 44.744232][ T50] process_scheduled_works+0x788/0x10b8 [ 44.744241][ T50] worker_thread+0x798/0xbd0 [ 44.744250][ T50] kthread+0x304/0x3d4 [ 44.744257][ T50] ret_from_fork+0x10/0x20 [ 44.744270][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 44.744281][ T50] Bluetooth: hci0: failed to register connection device [ 44.758398][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 44.758416][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 44.758429][ T50] Tainted: [W]=WARN [ 44.758432][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 44.758438][ T50] Workqueue: hci0 hci_rx_work [ 44.758451][ T50] Call trace: [ 44.758454][ T50] show_stack+0x2c/0x3c (C) [ 44.758469][ T50] __dump_stack+0x30/0x40 [ 44.758480][ T50] dump_stack_lvl+0xd8/0x12c [ 44.758489][ T50] dump_stack+0x1c/0x28 [ 44.758499][ T50] sysfs_warn_dup+0x9c/0xb8 [ 44.758510][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 44.758519][ T50] kobject_add_internal+0x290/0x6f0 [ 44.758528][ T50] kobject_add_varg+0x9c/0xe8 [ 44.758535][ T50] kobject_add+0x110/0x1c8 [ 44.758541][ T50] device_add+0x394/0x9e0 [ 44.758549][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 44.758559][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 44.758567][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 44.758575][ T50] hci_le_meta_evt+0x2b0/0x46c [ 44.758585][ T50] hci_event_packet+0x4c0/0x9c8 [ 44.758593][ T50] hci_rx_work+0x2f4/0xd78 [ 44.758600][ T50] process_scheduled_works+0x788/0x10b8 [ 44.758609][ T50] worker_thread+0x798/0xbd0 [ 44.758618][ T50] kthread+0x304/0x3d4 [ 44.758625][ T50] ret_from_fork+0x10/0x20 [ 44.758638][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 44.758650][ T50] Bluetooth: hci0: failed to register connection device [ 44.787531][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 44.787546][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 44.787558][ T50] Tainted: [W]=WARN [ 44.787561][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 44.787566][ T50] Workqueue: hci0 hci_rx_work [ 44.787580][ T50] Call trace: [ 44.787583][ T50] show_stack+0x2c/0x3c (C) [ 44.787598][ T50] __dump_stack+0x30/0x40 [ 44.787608][ T50] dump_stack_lvl+0xd8/0x12c [ 44.787618][ T50] dump_stack+0x1c/0x28 [ 44.787627][ T50] sysfs_warn_dup+0x9c/0xb8 [ 44.787637][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 44.787647][ T50] kobject_add_internal+0x290/0x6f0 [ 44.787656][ T50] kobject_add_varg+0x9c/0xe8 [ 44.787663][ T50] kobject_add+0x110/0x1c8 [ 44.787669][ T50] device_add+0x394/0x9e0 [ 44.787677][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 44.787687][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 44.787695][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 44.787703][ T50] hci_le_meta_evt+0x2b0/0x46c [ 44.787712][ T50] hci_event_packet+0x4c0/0x9c8 [ 44.787720][ T50] hci_rx_work+0x2f4/0xd78 [ 44.787727][ T50] process_scheduled_works+0x788/0x10b8 [ 44.787736][ T50] worker_thread+0x798/0xbd0 [ 44.787745][ T50] kthread+0x304/0x3d4 [ 44.787752][ T50] ret_from_fork+0x10/0x20 [ 44.787765][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 44.787776][ T50] Bluetooth: hci0: failed to register connection device [ 44.797527][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 44.797540][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 44.797552][ T50] Tainted: [W]=WARN [ 44.797555][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 44.797560][ T50] Workqueue: hci0 hci_rx_work [ 44.797571][ T50] Call trace: [ 44.797574][ T50] show_stack+0x2c/0x3c (C) [ 44.797588][ T50] __dump_stack+0x30/0x40 [ 44.797598][ T50] dump_stack_lvl+0xd8/0x12c [ 44.797608][ T50] dump_stack+0x1c/0x28 [ 44.797617][ T50] sysfs_warn_dup+0x9c/0xb8 [ 44.797627][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 44.797636][ T50] kobject_add_internal+0x290/0x6f0 [ 44.797644][ T50] kobject_add_varg+0x9c/0xe8 [ 44.797651][ T50] kobject_add+0x110/0x1c8 [ 44.797658][ T50] device_add+0x394/0x9e0 [ 44.797665][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 44.797674][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 44.797683][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 44.797691][ T50] hci_le_meta_evt+0x2b0/0x46c [ 44.797700][ T50] hci_event_packet+0x4c0/0x9c8 [ 44.797709][ T50] hci_rx_work+0x2f4/0xd78 [ 44.797715][ T50] process_scheduled_works+0x788/0x10b8 [ 44.797725][ T50] worker_thread+0x798/0xbd0 [ 44.797733][ T50] kthread+0x304/0x3d4 [ 44.797741][ T50] ret_from_fork+0x10/0x20 [ 44.797754][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 44.797766][ T50] Bluetooth: hci0: failed to register connection device [ 44.834773][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 44.834788][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 44.834800][ T50] Tainted: [W]=WARN [ 44.834803][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 44.834808][ T50] Workqueue: hci0 hci_rx_work [ 44.834822][ T50] Call trace: [ 44.834825][ T50] show_stack+0x2c/0x3c (C) [ 44.834839][ T50] __dump_stack+0x30/0x40 [ 44.834851][ T50] dump_stack_lvl+0xd8/0x12c [ 44.834860][ T50] dump_stack+0x1c/0x28 [ 44.834870][ T50] sysfs_warn_dup+0x9c/0xb8 [ 44.834880][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 44.834890][ T50] kobject_add_internal+0x290/0x6f0 [ 44.834899][ T50] kobject_add_varg+0x9c/0xe8 [ 44.834906][ T50] kobject_add+0x110/0x1c8 [ 44.834913][ T50] device_add+0x394/0x9e0 [ 44.834921][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 44.834930][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 44.834939][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 44.834947][ T50] hci_le_meta_evt+0x2b0/0x46c [ 44.834957][ T50] hci_event_packet+0x4c0/0x9c8 [ 44.834965][ T50] hci_rx_work+0x2f4/0xd78 [ 44.834972][ T50] process_scheduled_works+0x788/0x10b8 [ 44.834981][ T50] worker_thread+0x798/0xbd0 [ 44.834989][ T50] kthread+0x304/0x3d4 [ 44.834997][ T50] ret_from_fork+0x10/0x20 [ 44.835009][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 44.835021][ T50] Bluetooth: hci0: failed to register connection device [ 44.860017][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 44.860032][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 44.860044][ T50] Tainted: [W]=WARN [ 44.860047][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 44.860052][ T50] Workqueue: hci0 hci_rx_work [ 44.860065][ T50] Call trace: [ 44.860068][ T50] show_stack+0x2c/0x3c (C) [ 44.860088][ T50] __dump_stack+0x30/0x40 [ 44.860099][ T50] dump_stack_lvl+0xd8/0x12c [ 44.860115][ T50] dump_stack+0x1c/0x28 [ 44.860125][ T50] sysfs_warn_dup+0x9c/0xb8 [ 44.860135][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 44.860145][ T50] kobject_add_internal+0x290/0x6f0 [ 44.860154][ T50] kobject_add_varg+0x9c/0xe8 [ 44.860161][ T50] kobject_add+0x110/0x1c8 [ 44.860168][ T50] device_add+0x394/0x9e0 [ 44.860175][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 44.860185][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 44.860194][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 44.860202][ T50] hci_le_meta_evt+0x2b0/0x46c [ 44.860211][ T50] hci_event_packet+0x4c0/0x9c8 [ 44.860219][ T50] hci_rx_work+0x2f4/0xd78 [ 44.860226][ T50] process_scheduled_works+0x788/0x10b8 [ 44.860236][ T50] worker_thread+0x798/0xbd0 [ 44.860244][ T50] kthread+0x304/0x3d4 [ 44.860252][ T50] ret_from_fork+0x10/0x20 [ 44.860661][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 44.860677][ T50] Bluetooth: hci0: failed to register connection device [ 44.885253][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 44.885271][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 44.885284][ T50] Tainted: [W]=WARN [ 44.885288][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 44.885293][ T50] Workqueue: hci0 hci_rx_work [ 44.885307][ T50] Call trace: [ 44.885310][ T50] show_stack+0x2c/0x3c (C) [ 44.885325][ T50] __dump_stack+0x30/0x40 [ 44.885336][ T50] dump_stack_lvl+0xd8/0x12c [ 44.885345][ T50] dump_stack+0x1c/0x28 [ 44.885355][ T50] sysfs_warn_dup+0x9c/0xb8 [ 44.885365][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 44.885375][ T50] kobject_add_internal+0x290/0x6f0 [ 44.885384][ T50] kobject_add_varg+0x9c/0xe8 [ 44.885391][ T50] kobject_add+0x110/0x1c8 [ 44.885398][ T50] device_add+0x394/0x9e0 [ 44.885406][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 44.885415][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 44.885424][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 44.885433][ T50] hci_le_meta_evt+0x2b0/0x46c [ 44.885442][ T50] hci_event_packet+0x4c0/0x9c8 [ 44.885450][ T50] hci_rx_work+0x2f4/0xd78 [ 44.885457][ T50] process_scheduled_works+0x788/0x10b8 [ 44.885467][ T50] worker_thread+0x798/0xbd0 [ 44.885475][ T50] kthread+0x304/0x3d4 [ 44.885483][ T50] ret_from_fork+0x10/0x20 [ 44.885495][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 44.885506][ T50] Bluetooth: hci0: failed to register connection device [ 44.917807][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 44.917823][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 44.917835][ T50] Tainted: [W]=WARN [ 44.917839][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 44.917844][ T50] Workqueue: hci0 hci_rx_work [ 44.917859][ T50] Call trace: [ 44.917863][ T50] show_stack+0x2c/0x3c (C) [ 44.917878][ T50] __dump_stack+0x30/0x40 [ 44.917889][ T50] dump_stack_lvl+0xd8/0x12c [ 44.917899][ T50] dump_stack+0x1c/0x28 [ 44.917909][ T50] sysfs_warn_dup+0x9c/0xb8 [ 44.917920][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 44.917929][ T50] kobject_add_internal+0x290/0x6f0 [ 44.917938][ T50] kobject_add_varg+0x9c/0xe8 [ 44.917945][ T50] kobject_add+0x110/0x1c8 [ 44.917952][ T50] device_add+0x394/0x9e0 [ 44.917960][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 44.917970][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 44.917979][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 44.917987][ T50] hci_le_meta_evt+0x2b0/0x46c [ 44.917997][ T50] hci_event_packet+0x4c0/0x9c8 [ 44.918005][ T50] hci_rx_work+0x2f4/0xd78 [ 44.918012][ T50] process_scheduled_works+0x788/0x10b8 [ 44.918022][ T50] worker_thread+0x798/0xbd0 [ 44.918031][ T50] kthread+0x304/0x3d4 [ 44.918038][ T50] ret_from_fork+0x10/0x20 [ 44.918051][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 44.918063][ T50] Bluetooth: hci0: failed to register connection device [ 44.923278][ T306] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 44.929727][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 44.929740][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 44.929752][ T50] Tainted: [W]=WARN [ 44.929755][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 44.929759][ T50] Workqueue: hci0 hci_rx_work [ 44.929771][ T50] Call trace: [ 44.929774][ T50] show_stack+0x2c/0x3c (C) [ 44.929787][ T50] __dump_stack+0x30/0x40 [ 44.929798][ T50] dump_stack_lvl+0xd8/0x12c [ 44.929807][ T50] dump_stack+0x1c/0x28 [ 44.929817][ T50] sysfs_warn_dup+0x9c/0xb8 [ 44.929828][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 44.929837][ T50] kobject_add_internal+0x290/0x6f0 [ 44.929846][ T50] kobject_add_varg+0x9c/0xe8 [ 44.929854][ T50] kobject_add+0x110/0x1c8 [ 44.929861][ T50] device_add+0x394/0x9e0 [ 44.929868][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 44.929878][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 44.929887][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 44.929896][ T50] hci_le_meta_evt+0x2b0/0x46c [ 44.929905][ T50] hci_event_packet+0x4c0/0x9c8 [ 44.929914][ T50] hci_rx_work+0x2f4/0xd78 [ 44.929921][ T50] process_scheduled_works+0x788/0x10b8 [ 44.929930][ T50] worker_thread+0x798/0xbd0 [ 44.929939][ T50] kthread+0x304/0x3d4 [ 44.929946][ T50] ret_from_fork+0x10/0x20 [ 44.929959][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 44.929971][ T50] Bluetooth: hci0: failed to register connection device [ 44.940299][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 44.940314][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 44.940326][ T50] Tainted: [W]=WARN [ 44.940329][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 44.940334][ T50] Workqueue: hci0 hci_rx_work [ 44.940346][ T50] Call trace: [ 44.940349][ T50] show_stack+0x2c/0x3c (C) [ 44.940362][ T50] __dump_stack+0x30/0x40 [ 44.940373][ T50] dump_stack_lvl+0xd8/0x12c [ 44.940383][ T50] dump_stack+0x1c/0x28 [ 44.940392][ T50] sysfs_warn_dup+0x9c/0xb8 [ 44.940403][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 44.940413][ T50] kobject_add_internal+0x290/0x6f0 [ 44.940422][ T50] kobject_add_varg+0x9c/0xe8 [ 44.940429][ T50] kobject_add+0x110/0x1c8 [ 44.940436][ T50] device_add+0x394/0x9e0 [ 44.940444][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 44.940453][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 44.940461][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 44.940470][ T50] hci_le_meta_evt+0x2b0/0x46c [ 44.940480][ T50] hci_event_packet+0x4c0/0x9c8 [ 44.940488][ T50] hci_rx_work+0x2f4/0xd78 [ 44.940495][ T50] process_scheduled_works+0x788/0x10b8 [ 44.940504][ T50] worker_thread+0x798/0xbd0 [ 44.940513][ T50] kthread+0x304/0x3d4 [ 44.940520][ T50] ret_from_fork+0x10/0x20 [ 44.940533][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 44.940545][ T50] Bluetooth: hci0: failed to register connection device [ 44.946187][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 44.946198][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 44.946209][ T50] Tainted: [W]=WARN [ 44.946212][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 44.946217][ T50] Workqueue: hci0 hci_rx_work [ 44.946227][ T50] Call trace: [ 44.946230][ T50] show_stack+0x2c/0x3c (C) [ 44.946242][ T50] __dump_stack+0x30/0x40 [ 44.946253][ T50] dump_stack_lvl+0xd8/0x12c [ 44.946262][ T50] dump_stack+0x1c/0x28 [ 44.946272][ T50] sysfs_warn_dup+0x9c/0xb8 [ 44.946282][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 44.946291][ T50] kobject_add_internal+0x290/0x6f0 [ 44.946300][ T50] kobject_add_varg+0x9c/0xe8 [ 44.946307][ T50] kobject_add+0x110/0x1c8 [ 44.946314][ T50] device_add+0x394/0x9e0 [ 44.946321][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 44.946330][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 44.946339][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 44.946347][ T50] hci_le_meta_evt+0x2b0/0x46c [ 44.946357][ T50] hci_event_packet+0x4c0/0x9c8 [ 44.946365][ T50] hci_rx_work+0x2f4/0xd78 [ 44.946372][ T50] process_scheduled_works+0x788/0x10b8 [ 44.946381][ T50] worker_thread+0x798/0xbd0 [ 44.946389][ T50] kthread+0x304/0x3d4 [ 44.946397][ T50] ret_from_fork+0x10/0x20 [ 44.946409][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 44.946420][ T50] Bluetooth: hci0: failed to register connection device [ 44.958985][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 44.958999][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 44.959011][ T50] Tainted: [W]=WARN [ 44.959014][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 44.959019][ T50] Workqueue: hci0 hci_rx_work [ 44.959031][ T50] Call trace: [ 44.959034][ T50] show_stack+0x2c/0x3c (C) [ 44.959048][ T50] __dump_stack+0x30/0x40 [ 44.959059][ T50] dump_stack_lvl+0xd8/0x12c [ 44.959068][ T50] dump_stack+0x1c/0x28 [ 44.959078][ T50] sysfs_warn_dup+0x9c/0xb8 [ 44.959088][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 44.959098][ T50] kobject_add_internal+0x290/0x6f0 [ 44.959107][ T50] kobject_add_varg+0x9c/0xe8 [ 44.959123][ T50] kobject_add+0x110/0x1c8 [ 44.959130][ T50] device_add+0x394/0x9e0 [ 44.959139][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 44.959149][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 44.959158][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 44.959166][ T50] hci_le_meta_evt+0x2b0/0x46c [ 44.959175][ T50] hci_event_packet+0x4c0/0x9c8 [ 44.959184][ T50] hci_rx_work+0x2f4/0xd78 [ 44.959191][ T50] process_scheduled_works+0x788/0x10b8 [ 44.959201][ T50] worker_thread+0x798/0xbd0 [ 44.959209][ T50] kthread+0x304/0x3d4 [ 44.959217][ T50] ret_from_fork+0x10/0x20 [ 44.959229][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 44.959241][ T50] Bluetooth: hci0: failed to register connection device [ 44.964613][ T306] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 44.972377][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 44.972393][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 44.972405][ T50] Tainted: [W]=WARN [ 44.972408][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 44.972413][ T50] Workqueue: hci0 hci_rx_work [ 44.972426][ T50] Call trace: [ 44.972429][ T50] show_stack+0x2c/0x3c (C) [ 44.972443][ T50] __dump_stack+0x30/0x40 [ 44.972454][ T50] dump_stack_lvl+0xd8/0x12c [ 44.972464][ T50] dump_stack+0x1c/0x28 [ 44.972473][ T50] sysfs_warn_dup+0x9c/0xb8 [ 44.972484][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 44.972494][ T50] kobject_add_internal+0x290/0x6f0 [ 44.972502][ T50] kobject_add_varg+0x9c/0xe8 [ 44.972510][ T50] kobject_add+0x110/0x1c8 [ 44.972516][ T50] device_add+0x394/0x9e0 [ 44.972524][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 44.972533][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 44.972542][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 44.972550][ T50] hci_le_meta_evt+0x2b0/0x46c [ 44.972559][ T50] hci_event_packet+0x4c0/0x9c8 [ 44.972568][ T50] hci_rx_work+0x2f4/0xd78 [ 44.972575][ T50] process_scheduled_works+0x788/0x10b8 [ 44.972584][ T50] worker_thread+0x798/0xbd0 [ 44.972593][ T50] kthread+0x304/0x3d4 [ 44.972600][ T50] ret_from_fork+0x10/0x20 [ 44.972613][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 44.972624][ T50] Bluetooth: hci0: failed to register connection device [ 44.982037][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 44.982049][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 44.982061][ T50] Tainted: [W]=WARN [ 44.982064][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 44.982069][ T50] Workqueue: hci0 hci_rx_work [ 44.982079][ T50] Call trace: [ 44.982082][ T50] show_stack+0x2c/0x3c (C) [ 44.982095][ T50] __dump_stack+0x30/0x40 [ 44.982105][ T50] dump_stack_lvl+0xd8/0x12c [ 44.982123][ T50] dump_stack+0x1c/0x28 [ 44.982133][ T50] sysfs_warn_dup+0x9c/0xb8 [ 44.982143][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 44.982154][ T50] kobject_add_internal+0x290/0x6f0 [ 44.982162][ T50] kobject_add_varg+0x9c/0xe8 [ 44.982170][ T50] kobject_add+0x110/0x1c8 [ 44.982177][ T50] device_add+0x394/0x9e0 [ 44.982184][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 44.982194][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 44.982203][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 44.982211][ T50] hci_le_meta_evt+0x2b0/0x46c [ 44.982220][ T50] hci_event_packet+0x4c0/0x9c8 [ 44.982229][ T50] hci_rx_work+0x2f4/0xd78 [ 44.982236][ T50] process_scheduled_works+0x788/0x10b8 [ 44.982245][ T50] worker_thread+0x798/0xbd0 [ 44.982253][ T50] kthread+0x304/0x3d4 [ 44.982261][ T50] ret_from_fork+0x10/0x20 [ 44.982273][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 44.982285][ T50] Bluetooth: hci0: failed to register connection device [ 44.988208][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 44.988222][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 44.988235][ T50] Tainted: [W]=WARN [ 44.988238][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 44.988243][ T50] Workqueue: hci0 hci_rx_work [ 44.988253][ T50] Call trace: [ 44.988256][ T50] show_stack+0x2c/0x3c (C) [ 44.988268][ T50] __dump_stack+0x30/0x40 [ 44.988279][ T50] dump_stack_lvl+0xd8/0x12c [ 44.988289][ T50] dump_stack+0x1c/0x28 [ 44.988298][ T50] sysfs_warn_dup+0x9c/0xb8 [ 44.988308][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 44.988318][ T50] kobject_add_internal+0x290/0x6f0 [ 44.988326][ T50] kobject_add_varg+0x9c/0xe8 [ 44.988333][ T50] kobject_add+0x110/0x1c8 [ 44.988340][ T50] device_add+0x394/0x9e0 [ 44.988348][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 44.988357][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 44.988366][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 44.988374][ T50] hci_le_meta_evt+0x2b0/0x46c [ 44.988383][ T50] hci_event_packet+0x4c0/0x9c8 [ 44.988392][ T50] hci_rx_work+0x2f4/0xd78 [ 44.988399][ T50] process_scheduled_works+0x788/0x10b8 [ 44.988408][ T50] worker_thread+0x798/0xbd0 [ 44.988417][ T50] kthread+0x304/0x3d4 [ 44.988424][ T50] ret_from_fork+0x10/0x20 [ 44.988436][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 44.988447][ T50] Bluetooth: hci0: failed to register connection device [ 44.999223][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 44.999237][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 44.999248][ T50] Tainted: [W]=WARN [ 44.999252][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 44.999256][ T50] Workqueue: hci0 hci_rx_work [ 44.999268][ T50] Call trace: [ 44.999271][ T50] show_stack+0x2c/0x3c (C) [ 44.999284][ T50] __dump_stack+0x30/0x40 [ 44.999295][ T50] dump_stack_lvl+0xd8/0x12c [ 44.999305][ T50] dump_stack+0x1c/0x28 [ 44.999314][ T50] sysfs_warn_dup+0x9c/0xb8 [ 44.999325][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 44.999335][ T50] kobject_add_internal+0x290/0x6f0 [ 44.999343][ T50] kobject_add_varg+0x9c/0xe8 [ 44.999350][ T50] kobject_add+0x110/0x1c8 [ 44.999357][ T50] device_add+0x394/0x9e0 [ 44.999365][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 44.999375][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 44.999383][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 44.999391][ T50] hci_le_meta_evt+0x2b0/0x46c [ 44.999401][ T50] hci_event_packet+0x4c0/0x9c8 [ 44.999409][ T50] hci_rx_work+0x2f4/0xd78 [ 44.999416][ T50] process_scheduled_works+0x788/0x10b8 [ 44.999425][ T50] worker_thread+0x798/0xbd0 [ 44.999434][ T50] kthread+0x304/0x3d4 [ 44.999441][ T50] ret_from_fork+0x10/0x20 [ 44.999454][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 44.999465][ T50] Bluetooth: hci0: failed to register connection device [ 45.002439][ T306] bond0 (unregistering): Released all slaves [ 45.101650][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 45.101666][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 45.101678][ T50] Tainted: [W]=WARN [ 45.101682][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 45.101687][ T50] Workqueue: hci0 hci_rx_work [ 45.101701][ T50] Call trace: [ 45.101704][ T50] show_stack+0x2c/0x3c (C) [ 45.101720][ T50] __dump_stack+0x30/0x40 [ 45.101732][ T50] dump_stack_lvl+0xd8/0x12c [ 45.101742][ T50] dump_stack+0x1c/0x28 [ 45.101752][ T50] sysfs_warn_dup+0x9c/0xb8 [ 45.101763][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 45.101772][ T50] kobject_add_internal+0x290/0x6f0 [ 45.101781][ T50] kobject_add_varg+0x9c/0xe8 [ 45.101789][ T50] kobject_add+0x110/0x1c8 [ 45.101796][ T50] device_add+0x394/0x9e0 [ 45.101803][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 45.101813][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 45.101822][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 45.101830][ T50] hci_le_meta_evt+0x2b0/0x46c [ 45.101839][ T50] hci_event_packet+0x4c0/0x9c8 [ 45.101848][ T50] hci_rx_work+0x2f4/0xd78 [ 45.101855][ T50] process_scheduled_works+0x788/0x10b8 [ 45.101865][ T50] worker_thread+0x798/0xbd0 [ 45.101873][ T50] kthread+0x304/0x3d4 [ 45.101881][ T50] ret_from_fork+0x10/0x20 [ 45.101893][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 45.101906][ T50] Bluetooth: hci0: failed to register connection device [ 45.161599][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 45.161616][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 45.161628][ T50] Tainted: [W]=WARN [ 45.161632][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 45.161638][ T50] Workqueue: hci0 hci_rx_work [ 45.161652][ T50] Call trace: [ 45.161655][ T50] show_stack+0x2c/0x3c (C) [ 45.161670][ T50] __dump_stack+0x30/0x40 [ 45.161681][ T50] dump_stack_lvl+0xd8/0x12c [ 45.161690][ T50] dump_stack+0x1c/0x28 [ 45.161700][ T50] sysfs_warn_dup+0x9c/0xb8 [ 45.161710][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 45.161720][ T50] kobject_add_internal+0x290/0x6f0 [ 45.161729][ T50] kobject_add_varg+0x9c/0xe8 [ 45.161737][ T50] kobject_add+0x110/0x1c8 [ 45.161744][ T50] device_add+0x394/0x9e0 [ 45.161751][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 45.161761][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 45.161770][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 45.161778][ T50] hci_le_meta_evt+0x2b0/0x46c [ 45.161787][ T50] hci_event_packet+0x4c0/0x9c8 [ 45.161796][ T50] hci_rx_work+0x2f4/0xd78 [ 45.161803][ T50] process_scheduled_works+0x788/0x10b8 [ 45.161812][ T50] worker_thread+0x798/0xbd0 [ 45.161821][ T50] kthread+0x304/0x3d4 [ 45.161829][ T50] ret_from_fork+0x10/0x20 [ 45.161841][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 45.161853][ T50] Bluetooth: hci0: failed to register connection device [ 45.220478][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 45.220495][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 45.220508][ T50] Tainted: [W]=WARN [ 45.220512][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 45.220517][ T50] Workqueue: hci0 hci_rx_work [ 45.220532][ T50] Call trace: [ 45.220535][ T50] show_stack+0x2c/0x3c (C) [ 45.220550][ T50] __dump_stack+0x30/0x40 [ 45.220560][ T50] dump_stack_lvl+0xd8/0x12c [ 45.220570][ T50] dump_stack+0x1c/0x28 [ 45.220580][ T50] sysfs_warn_dup+0x9c/0xb8 [ 45.220591][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 45.220601][ T50] kobject_add_internal+0x290/0x6f0 [ 45.220610][ T50] kobject_add_varg+0x9c/0xe8 [ 45.220617][ T50] kobject_add+0x110/0x1c8 [ 45.220624][ T50] device_add+0x394/0x9e0 [ 45.220632][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 45.220642][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 45.220650][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 45.220659][ T50] hci_le_meta_evt+0x2b0/0x46c [ 45.220668][ T50] hci_event_packet+0x4c0/0x9c8 [ 45.220677][ T50] hci_rx_work+0x2f4/0xd78 [ 45.220683][ T50] process_scheduled_works+0x788/0x10b8 [ 45.220693][ T50] worker_thread+0x798/0xbd0 [ 45.220701][ T50] kthread+0x304/0x3d4 [ 45.220709][ T50] ret_from_fork+0x10/0x20 [ 45.220722][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 45.220733][ T50] Bluetooth: hci0: failed to register connection device [ 45.243243][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 45.243258][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 45.243270][ T50] Tainted: [W]=WARN [ 45.243273][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 45.243278][ T50] Workqueue: hci0 hci_rx_work [ 45.243291][ T50] Call trace: [ 45.243294][ T50] show_stack+0x2c/0x3c (C) [ 45.243309][ T50] __dump_stack+0x30/0x40 [ 45.243319][ T50] dump_stack_lvl+0xd8/0x12c [ 45.243329][ T50] dump_stack+0x1c/0x28 [ 45.243339][ T50] sysfs_warn_dup+0x9c/0xb8 [ 45.243349][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 45.243359][ T50] kobject_add_internal+0x290/0x6f0 [ 45.243368][ T50] kobject_add_varg+0x9c/0xe8 [ 45.243375][ T50] kobject_add+0x110/0x1c8 [ 45.243382][ T50] device_add+0x394/0x9e0 [ 45.243390][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 45.243400][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 45.243408][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 45.243416][ T50] hci_le_meta_evt+0x2b0/0x46c [ 45.243426][ T50] hci_event_packet+0x4c0/0x9c8 [ 45.243434][ T50] hci_rx_work+0x2f4/0xd78 [ 45.243441][ T50] process_scheduled_works+0x788/0x10b8 [ 45.243451][ T50] worker_thread+0x798/0xbd0 [ 45.243459][ T50] kthread+0x304/0x3d4 [ 45.243467][ T50] ret_from_fork+0x10/0x20 [ 45.243479][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 45.243491][ T50] Bluetooth: hci0: failed to register connection device [ 45.249337][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 45.249350][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 45.249364][ T50] Tainted: [W]=WARN [ 45.249367][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 45.249373][ T50] Workqueue: hci0 hci_rx_work [ 45.249383][ T50] Call trace: [ 45.249386][ T50] show_stack+0x2c/0x3c (C) [ 45.249398][ T50] __dump_stack+0x30/0x40 [ 45.249409][ T50] dump_stack_lvl+0xd8/0x12c [ 45.249419][ T50] dump_stack+0x1c/0x28 [ 45.249428][ T50] sysfs_warn_dup+0x9c/0xb8 [ 45.249438][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 45.249448][ T50] kobject_add_internal+0x290/0x6f0 [ 45.249456][ T50] kobject_add_varg+0x9c/0xe8 [ 45.249463][ T50] kobject_add+0x110/0x1c8 [ 45.249470][ T50] device_add+0x394/0x9e0 [ 45.249477][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 45.249487][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 45.249496][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 45.249504][ T50] hci_le_meta_evt+0x2b0/0x46c [ 45.249513][ T50] hci_event_packet+0x4c0/0x9c8 [ 45.249521][ T50] hci_rx_work+0x2f4/0xd78 [ 45.249528][ T50] process_scheduled_works+0x788/0x10b8 [ 45.249537][ T50] worker_thread+0x798/0xbd0 [ 45.249545][ T50] kthread+0x304/0x3d4 [ 45.249553][ T50] ret_from_fork+0x10/0x20 [ 45.249565][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 45.249576][ T50] Bluetooth: hci0: failed to register connection device [ 45.260644][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 45.260657][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 45.260669][ T50] Tainted: [W]=WARN [ 45.260672][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 45.260677][ T50] Workqueue: hci0 hci_rx_work [ 45.260689][ T50] Call trace: [ 45.260692][ T50] show_stack+0x2c/0x3c (C) [ 45.260705][ T50] __dump_stack+0x30/0x40 [ 45.260717][ T50] dump_stack_lvl+0xd8/0x12c [ 45.260727][ T50] dump_stack+0x1c/0x28 [ 45.260736][ T50] sysfs_warn_dup+0x9c/0xb8 [ 45.260747][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 45.260757][ T50] kobject_add_internal+0x290/0x6f0 [ 45.260766][ T50] kobject_add_varg+0x9c/0xe8 [ 45.260773][ T50] kobject_add+0x110/0x1c8 [ 45.260780][ T50] device_add+0x394/0x9e0 [ 45.260788][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 45.260798][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 45.260807][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 45.260816][ T50] hci_le_meta_evt+0x2b0/0x46c [ 45.260826][ T50] hci_event_packet+0x4c0/0x9c8 [ 45.260834][ T50] hci_rx_work+0x2f4/0xd78 [ 45.260841][ T50] process_scheduled_works+0x788/0x10b8 [ 45.260851][ T50] worker_thread+0x798/0xbd0 [ 45.260859][ T50] kthread+0x304/0x3d4 [ 45.260867][ T50] ret_from_fork+0x10/0x20 [ 45.260880][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 45.260892][ T50] Bluetooth: hci0: failed to register connection device [ 45.276649][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 45.276665][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 45.276680][ T50] Tainted: [W]=WARN [ 45.276684][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 45.276691][ T50] Workqueue: hci0 hci_rx_work [ 45.276706][ T50] Call trace: [ 45.276709][ T50] show_stack+0x2c/0x3c (C) [ 45.276723][ T50] __dump_stack+0x30/0x40 [ 45.276734][ T50] dump_stack_lvl+0xd8/0x12c [ 45.276744][ T50] dump_stack+0x1c/0x28 [ 45.276754][ T50] sysfs_warn_dup+0x9c/0xb8 [ 45.276765][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 45.276775][ T50] kobject_add_internal+0x290/0x6f0 [ 45.276784][ T50] kobject_add_varg+0x9c/0xe8 [ 45.276791][ T50] kobject_add+0x110/0x1c8 [ 45.276798][ T50] device_add+0x394/0x9e0 [ 45.276806][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 45.276815][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 45.276824][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 45.276832][ T50] hci_le_meta_evt+0x2b0/0x46c [ 45.276841][ T50] hci_event_packet+0x4c0/0x9c8 [ 45.276850][ T50] hci_rx_work+0x2f4/0xd78 [ 45.276857][ T50] process_scheduled_works+0x788/0x10b8 [ 45.276866][ T50] worker_thread+0x798/0xbd0 [ 45.276875][ T50] kthread+0x304/0x3d4 [ 45.276882][ T50] ret_from_fork+0x10/0x20 [ 45.276896][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 45.276908][ T50] Bluetooth: hci0: failed to register connection device [ 45.286073][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 45.286085][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 45.286097][ T50] Tainted: [W]=WARN [ 45.286100][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 45.286104][ T50] Workqueue: hci0 hci_rx_work [ 45.286124][ T50] Call trace: [ 45.286127][ T50] show_stack+0x2c/0x3c (C) [ 45.286145][ T50] __dump_stack+0x30/0x40 [ 45.286158][ T50] dump_stack_lvl+0xd8/0x12c [ 45.286168][ T50] dump_stack+0x1c/0x28 [ 45.286178][ T50] sysfs_warn_dup+0x9c/0xb8 [ 45.286189][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 45.286198][ T50] kobject_add_internal+0x290/0x6f0 [ 45.286207][ T50] kobject_add_varg+0x9c/0xe8 [ 45.286214][ T50] kobject_add+0x110/0x1c8 [ 45.286221][ T50] device_add+0x394/0x9e0 [ 45.286229][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 45.286238][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 45.286247][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 45.286255][ T50] hci_le_meta_evt+0x2b0/0x46c [ 45.286265][ T50] hci_event_packet+0x4c0/0x9c8 [ 45.286274][ T50] hci_rx_work+0x2f4/0xd78 [ 45.286280][ T50] process_scheduled_works+0x788/0x10b8 [ 45.286289][ T50] worker_thread+0x798/0xbd0 [ 45.286298][ T50] kthread+0x304/0x3d4 [ 45.286305][ T50] ret_from_fork+0x10/0x20 [ 45.286317][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 45.286329][ T50] Bluetooth: hci0: failed to register connection device [ 45.294818][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 45.294830][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 45.294842][ T50] Tainted: [W]=WARN [ 45.294845][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 45.294850][ T50] Workqueue: hci0 hci_rx_work [ 45.294860][ T50] Call trace: [ 45.294863][ T50] show_stack+0x2c/0x3c (C) [ 45.294876][ T50] __dump_stack+0x30/0x40 [ 45.294886][ T50] dump_stack_lvl+0xd8/0x12c [ 45.294896][ T50] dump_stack+0x1c/0x28 [ 45.294905][ T50] sysfs_warn_dup+0x9c/0xb8 [ 45.294915][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 45.294925][ T50] kobject_add_internal+0x290/0x6f0 [ 45.294934][ T50] kobject_add_varg+0x9c/0xe8 [ 45.294941][ T50] kobject_add+0x110/0x1c8 [ 45.294947][ T50] device_add+0x394/0x9e0 [ 45.294955][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 45.294964][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 45.294973][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 45.294981][ T50] hci_le_meta_evt+0x2b0/0x46c [ 45.294990][ T50] hci_event_packet+0x4c0/0x9c8 [ 45.294999][ T50] hci_rx_work+0x2f4/0xd78 [ 45.295006][ T50] process_scheduled_works+0x788/0x10b8 [ 45.295015][ T50] worker_thread+0x798/0xbd0 [ 45.295023][ T50] kthread+0x304/0x3d4 [ 45.295031][ T50] ret_from_fork+0x10/0x20 [ 45.295043][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 45.295056][ T50] Bluetooth: hci0: failed to register connection device [ 45.306311][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 45.306325][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 45.306337][ T50] Tainted: [W]=WARN [ 45.306340][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 45.306345][ T50] Workqueue: hci0 hci_rx_work [ 45.306359][ T50] Call trace: [ 45.306362][ T50] show_stack+0x2c/0x3c (C) [ 45.306377][ T50] __dump_stack+0x30/0x40 [ 45.306387][ T50] dump_stack_lvl+0xd8/0x12c [ 45.306397][ T50] dump_stack+0x1c/0x28 [ 45.306406][ T50] sysfs_warn_dup+0x9c/0xb8 [ 45.306417][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 45.306427][ T50] kobject_add_internal+0x290/0x6f0 [ 45.306436][ T50] kobject_add_varg+0x9c/0xe8 [ 45.306443][ T50] kobject_add+0x110/0x1c8 [ 45.306450][ T50] device_add+0x394/0x9e0 [ 45.306458][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 45.306467][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 45.306475][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 45.306484][ T50] hci_le_meta_evt+0x2b0/0x46c [ 45.306493][ T50] hci_event_packet+0x4c0/0x9c8 [ 45.306502][ T50] hci_rx_work+0x2f4/0xd78 [ 45.306509][ T50] process_scheduled_works+0x788/0x10b8 [ 45.306518][ T50] worker_thread+0x798/0xbd0 [ 45.306527][ T50] kthread+0x304/0x3d4 [ 45.306534][ T50] ret_from_fork+0x10/0x20 [ 45.306547][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 45.306558][ T50] Bluetooth: hci0: failed to register connection device [ 45.329947][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 45.329962][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 45.329974][ T50] Tainted: [W]=WARN [ 45.329977][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 45.329982][ T50] Workqueue: hci0 hci_rx_work [ 45.329996][ T50] Call trace: [ 45.329999][ T50] show_stack+0x2c/0x3c (C) [ 45.330014][ T50] __dump_stack+0x30/0x40 [ 45.330024][ T50] dump_stack_lvl+0xd8/0x12c [ 45.330034][ T50] dump_stack+0x1c/0x28 [ 45.330044][ T50] sysfs_warn_dup+0x9c/0xb8 [ 45.330054][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 45.330064][ T50] kobject_add_internal+0x290/0x6f0 [ 45.330073][ T50] kobject_add_varg+0x9c/0xe8 [ 45.330080][ T50] kobject_add+0x110/0x1c8 [ 45.330090][ T50] device_add+0x394/0x9e0 [ 45.330098][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 45.330107][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 45.330121][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 45.330130][ T50] hci_le_meta_evt+0x2b0/0x46c [ 45.330140][ T50] hci_event_packet+0x4c0/0x9c8 [ 45.330148][ T50] hci_rx_work+0x2f4/0xd78 [ 45.330155][ T50] process_scheduled_works+0x788/0x10b8 [ 45.330165][ T50] worker_thread+0x798/0xbd0 [ 45.330173][ T50] kthread+0x304/0x3d4 [ 45.330181][ T50] ret_from_fork+0x10/0x20 [ 45.330475][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 45.330490][ T50] Bluetooth: hci0: failed to register connection device [ 45.343377][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 45.343392][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 45.343404][ T50] Tainted: [W]=WARN [ 45.343407][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 45.343412][ T50] Workqueue: hci0 hci_rx_work [ 45.343426][ T50] Call trace: [ 45.343429][ T50] show_stack+0x2c/0x3c (C) [ 45.343443][ T50] __dump_stack+0x30/0x40 [ 45.343454][ T50] dump_stack_lvl+0xd8/0x12c [ 45.343464][ T50] dump_stack+0x1c/0x28 [ 45.343473][ T50] sysfs_warn_dup+0x9c/0xb8 [ 45.343484][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 45.343493][ T50] kobject_add_internal+0x290/0x6f0 [ 45.343502][ T50] kobject_add_varg+0x9c/0xe8 [ 45.343509][ T50] kobject_add+0x110/0x1c8 [ 45.343516][ T50] device_add+0x394/0x9e0 [ 45.343524][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 45.343533][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 45.343542][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 45.343550][ T50] hci_le_meta_evt+0x2b0/0x46c [ 45.343559][ T50] hci_event_packet+0x4c0/0x9c8 [ 45.343567][ T50] hci_rx_work+0x2f4/0xd78 [ 45.343574][ T50] process_scheduled_works+0x788/0x10b8 [ 45.343584][ T50] worker_thread+0x798/0xbd0 [ 45.343593][ T50] kthread+0x304/0x3d4 [ 45.343600][ T50] ret_from_fork+0x10/0x20 [ 45.343613][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 45.343626][ T50] Bluetooth: hci0: failed to register connection device [ 45.364145][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 45.364160][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 45.364173][ T50] Tainted: [W]=WARN [ 45.364176][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 45.364181][ T50] Workqueue: hci0 hci_rx_work [ 45.364195][ T50] Call trace: [ 45.364198][ T50] show_stack+0x2c/0x3c (C) [ 45.364214][ T50] __dump_stack+0x30/0x40 [ 45.364224][ T50] dump_stack_lvl+0xd8/0x12c [ 45.364234][ T50] dump_stack+0x1c/0x28 [ 45.364244][ T50] sysfs_warn_dup+0x9c/0xb8 [ 45.364255][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 45.364265][ T50] kobject_add_internal+0x290/0x6f0 [ 45.364274][ T50] kobject_add_varg+0x9c/0xe8 [ 45.364281][ T50] kobject_add+0x110/0x1c8 [ 45.364288][ T50] device_add+0x394/0x9e0 [ 45.364295][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 45.364305][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 45.364313][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 45.364322][ T50] hci_le_meta_evt+0x2b0/0x46c [ 45.364331][ T50] hci_event_packet+0x4c0/0x9c8 [ 45.364340][ T50] hci_rx_work+0x2f4/0xd78 [ 45.364346][ T50] process_scheduled_works+0x788/0x10b8 [ 45.364356][ T50] worker_thread+0x798/0xbd0 [ 45.364365][ T50] kthread+0x304/0x3d4 [ 45.364373][ T50] ret_from_fork+0x10/0x20 [ 45.364385][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 45.364398][ T50] Bluetooth: hci0: failed to register connection device [ 45.381350][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 45.381368][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 45.381381][ T50] Tainted: [W]=WARN [ 45.381384][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 45.381390][ T50] Workqueue: hci0 hci_rx_work [ 45.381404][ T50] Call trace: [ 45.381407][ T50] show_stack+0x2c/0x3c (C) [ 45.381422][ T50] __dump_stack+0x30/0x40 [ 45.381433][ T50] dump_stack_lvl+0xd8/0x12c [ 45.381443][ T50] dump_stack+0x1c/0x28 [ 45.381452][ T50] sysfs_warn_dup+0x9c/0xb8 [ 45.381463][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 45.381473][ T50] kobject_add_internal+0x290/0x6f0 [ 45.381482][ T50] kobject_add_varg+0x9c/0xe8 [ 45.381489][ T50] kobject_add+0x110/0x1c8 [ 45.381496][ T50] device_add+0x394/0x9e0 [ 45.381504][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 45.381513][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 45.381522][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 45.381530][ T50] hci_le_meta_evt+0x2b0/0x46c [ 45.381539][ T50] hci_event_packet+0x4c0/0x9c8 [ 45.381548][ T50] hci_rx_work+0x2f4/0xd78 [ 45.381555][ T50] process_scheduled_works+0x788/0x10b8 [ 45.381565][ T50] worker_thread+0x798/0xbd0 [ 45.381573][ T50] kthread+0x304/0x3d4 [ 45.381581][ T50] ret_from_fork+0x10/0x20 [ 45.381594][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 45.381607][ T50] Bluetooth: hci0: failed to register connection device [ 45.394235][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 45.394253][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 45.394267][ T50] Tainted: [W]=WARN [ 45.394271][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 45.394276][ T50] Workqueue: hci0 hci_rx_work [ 45.394290][ T50] Call trace: [ 45.394292][ T50] show_stack+0x2c/0x3c (C) [ 45.394308][ T50] __dump_stack+0x30/0x40 [ 45.394320][ T50] dump_stack_lvl+0xd8/0x12c [ 45.394330][ T50] dump_stack+0x1c/0x28 [ 45.394340][ T50] sysfs_warn_dup+0x9c/0xb8 [ 45.394351][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 45.394361][ T50] kobject_add_internal+0x290/0x6f0 [ 45.394370][ T50] kobject_add_varg+0x9c/0xe8 [ 45.394377][ T50] kobject_add+0x110/0x1c8 [ 45.394384][ T50] device_add+0x394/0x9e0 [ 45.394392][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 45.394401][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 45.394410][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 45.394418][ T50] hci_le_meta_evt+0x2b0/0x46c [ 45.394428][ T50] hci_event_packet+0x4c0/0x9c8 [ 45.394437][ T50] hci_rx_work+0x2f4/0xd78 [ 45.394443][ T50] process_scheduled_works+0x788/0x10b8 [ 45.394453][ T50] worker_thread+0x798/0xbd0 [ 45.394461][ T50] kthread+0x304/0x3d4 [ 45.394469][ T50] ret_from_fork+0x10/0x20 [ 45.394482][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 45.394494][ T50] Bluetooth: hci0: failed to register connection device [ 45.455472][ T306] hsr_slave_0: left promiscuous mode [ 45.456004][ T306] hsr_slave_1: left promiscuous mode [ 45.456280][ T306] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 45.456300][ T306] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 45.457061][ T306] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 45.457073][ T306] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 45.464703][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 45.464716][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 45.464728][ T50] Tainted: [W]=WARN [ 45.464731][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 45.464736][ T50] Workqueue: hci0 hci_rx_work [ 45.464749][ T50] Call trace: [ 45.464752][ T50] show_stack+0x2c/0x3c (C) [ 45.464767][ T50] __dump_stack+0x30/0x40 [ 45.464778][ T50] dump_stack_lvl+0xd8/0x12c [ 45.464788][ T50] dump_stack+0x1c/0x28 [ 45.464797][ T50] sysfs_warn_dup+0x9c/0xb8 [ 45.464808][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 45.464817][ T50] kobject_add_internal+0x290/0x6f0 [ 45.464827][ T50] kobject_add_varg+0x9c/0xe8 [ 45.464834][ T50] kobject_add+0x110/0x1c8 [ 45.464841][ T50] device_add+0x394/0x9e0 [ 45.464848][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 45.464858][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 45.464868][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 45.464876][ T50] hci_le_meta_evt+0x2b0/0x46c [ 45.464886][ T50] hci_event_packet+0x4c0/0x9c8 [ 45.464894][ T50] hci_rx_work+0x2f4/0xd78 [ 45.464901][ T50] process_scheduled_works+0x788/0x10b8 [ 45.464910][ T50] worker_thread+0x798/0xbd0 [ 45.464919][ T50] kthread+0x304/0x3d4 [ 45.464927][ T50] ret_from_fork+0x10/0x20 [ 45.464940][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 45.464951][ T50] Bluetooth: hci0: failed to register connection device [ 45.475798][ T306] veth1_macvtap: left promiscuous mode [ 45.475834][ T306] veth0_macvtap: left promiscuous mode [ 45.475887][ T306] veth1_vlan: left promiscuous mode [ 45.475948][ T306] veth0_vlan: left promiscuous mode [ 45.524384][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 45.524401][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 45.524413][ T50] Tainted: [W]=WARN [ 45.524416][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 45.524422][ T50] Workqueue: hci0 hci_rx_work [ 45.524437][ T50] Call trace: [ 45.524440][ T50] show_stack+0x2c/0x3c (C) [ 45.524455][ T50] __dump_stack+0x30/0x40 [ 45.524466][ T50] dump_stack_lvl+0xd8/0x12c [ 45.524476][ T50] dump_stack+0x1c/0x28 [ 45.524485][ T50] sysfs_warn_dup+0x9c/0xb8 [ 45.524496][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 45.524506][ T50] kobject_add_internal+0x290/0x6f0 [ 45.524515][ T50] kobject_add_varg+0x9c/0xe8 [ 45.524522][ T50] kobject_add+0x110/0x1c8 [ 45.524529][ T50] device_add+0x394/0x9e0 [ 45.524538][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 45.524547][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 45.524556][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 45.524564][ T50] hci_le_meta_evt+0x2b0/0x46c [ 45.524573][ T50] hci_event_packet+0x4c0/0x9c8 [ 45.524582][ T50] hci_rx_work+0x2f4/0xd78 [ 45.524589][ T50] process_scheduled_works+0x788/0x10b8 [ 45.524599][ T50] worker_thread+0x798/0xbd0 [ 45.524607][ T50] kthread+0x304/0x3d4 [ 45.524615][ T50] ret_from_fork+0x10/0x20 [ 45.524628][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 45.524640][ T50] Bluetooth: hci0: failed to register connection device [ 45.578888][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 45.578904][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 45.578916][ T50] Tainted: [W]=WARN [ 45.578919][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 45.578925][ T50] Workqueue: hci0 hci_rx_work [ 45.578940][ T50] Call trace: [ 45.578943][ T50] show_stack+0x2c/0x3c (C) [ 45.578959][ T50] __dump_stack+0x30/0x40 [ 45.578969][ T50] dump_stack_lvl+0xd8/0x12c [ 45.578980][ T50] dump_stack+0x1c/0x28 [ 45.578989][ T50] sysfs_warn_dup+0x9c/0xb8 [ 45.579000][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 45.579010][ T50] kobject_add_internal+0x290/0x6f0 [ 45.579019][ T50] kobject_add_varg+0x9c/0xe8 [ 45.579026][ T50] kobject_add+0x110/0x1c8 [ 45.579033][ T50] device_add+0x394/0x9e0 [ 45.579041][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 45.579051][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 45.579060][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 45.579068][ T50] hci_le_meta_evt+0x2b0/0x46c [ 45.579077][ T50] hci_event_packet+0x4c0/0x9c8 [ 45.579086][ T50] hci_rx_work+0x2f4/0xd78 [ 45.579093][ T50] process_scheduled_works+0x788/0x10b8 [ 45.579103][ T50] worker_thread+0x798/0xbd0 [ 45.579118][ T50] kthread+0x304/0x3d4 [ 45.579126][ T50] ret_from_fork+0x10/0x20 [ 45.579141][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 45.579153][ T50] Bluetooth: hci0: failed to register connection device [ 45.608330][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 45.608348][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 45.608363][ T50] Tainted: [W]=WARN [ 45.608366][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 45.608372][ T50] Workqueue: hci0 hci_rx_work [ 45.608387][ T50] Call trace: [ 45.608390][ T50] show_stack+0x2c/0x3c (C) [ 45.608405][ T50] __dump_stack+0x30/0x40 [ 45.608416][ T50] dump_stack_lvl+0xd8/0x12c [ 45.608426][ T50] dump_stack+0x1c/0x28 [ 45.608436][ T50] sysfs_warn_dup+0x9c/0xb8 [ 45.608447][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 45.608456][ T50] kobject_add_internal+0x290/0x6f0 [ 45.608465][ T50] kobject_add_varg+0x9c/0xe8 [ 45.608473][ T50] kobject_add+0x110/0x1c8 [ 45.608480][ T50] device_add+0x394/0x9e0 [ 45.608488][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 45.608497][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 45.608506][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 45.608514][ T50] hci_le_meta_evt+0x2b0/0x46c [ 45.608523][ T50] hci_event_packet+0x4c0/0x9c8 [ 45.608532][ T50] hci_rx_work+0x2f4/0xd78 [ 45.608539][ T50] process_scheduled_works+0x788/0x10b8 [ 45.608549][ T50] worker_thread+0x798/0xbd0 [ 45.608557][ T50] kthread+0x304/0x3d4 [ 45.608565][ T50] ret_from_fork+0x10/0x20 [ 45.608578][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 45.608589][ T50] Bluetooth: hci0: failed to register connection device [ 45.648817][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 45.648832][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 45.648844][ T50] Tainted: [W]=WARN [ 45.648848][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 45.648853][ T50] Workqueue: hci0 hci_rx_work [ 45.648867][ T50] Call trace: [ 45.648870][ T50] show_stack+0x2c/0x3c (C) [ 45.648884][ T50] __dump_stack+0x30/0x40 [ 45.648895][ T50] dump_stack_lvl+0xd8/0x12c [ 45.648904][ T50] dump_stack+0x1c/0x28 [ 45.648914][ T50] sysfs_warn_dup+0x9c/0xb8 [ 45.648925][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 45.648935][ T50] kobject_add_internal+0x290/0x6f0 [ 45.648944][ T50] kobject_add_varg+0x9c/0xe8 [ 45.648951][ T50] kobject_add+0x110/0x1c8 [ 45.648958][ T50] device_add+0x394/0x9e0 [ 45.648966][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 45.648975][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 45.648984][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 45.648992][ T50] hci_le_meta_evt+0x2b0/0x46c [ 45.649001][ T50] hci_event_packet+0x4c0/0x9c8 [ 45.649010][ T50] hci_rx_work+0x2f4/0xd78 [ 45.649017][ T50] process_scheduled_works+0x788/0x10b8 [ 45.649026][ T50] worker_thread+0x798/0xbd0 [ 45.649035][ T50] kthread+0x304/0x3d4 [ 45.649043][ T50] ret_from_fork+0x10/0x20 [ 45.649056][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 45.649069][ T50] Bluetooth: hci0: failed to register connection device [ 45.670662][ T306] team0 (unregistering): Port device team_slave_1 removed [ 45.674671][ T306] team0 (unregistering): Port device team_slave_0 removed [ 45.730676][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 45.730693][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 45.730706][ T50] Tainted: [W]=WARN [ 45.730709][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 45.730714][ T50] Workqueue: hci0 hci_rx_work [ 45.730729][ T50] Call trace: [ 45.730732][ T50] show_stack+0x2c/0x3c (C) [ 45.730750][ T50] __dump_stack+0x30/0x40 [ 45.730762][ T50] dump_stack_lvl+0xd8/0x12c [ 45.730773][ T50] dump_stack+0x1c/0x28 [ 45.730786][ T50] sysfs_warn_dup+0x9c/0xb8 [ 45.730797][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 45.730807][ T50] kobject_add_internal+0x290/0x6f0 [ 45.730816][ T50] kobject_add_varg+0x9c/0xe8 [ 45.730823][ T50] kobject_add+0x110/0x1c8 [ 45.730830][ T50] device_add+0x394/0x9e0 [ 45.730838][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 45.730848][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 45.730857][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 45.730865][ T50] hci_le_meta_evt+0x2b0/0x46c [ 45.730874][ T50] hci_event_packet+0x4c0/0x9c8 [ 45.730883][ T50] hci_rx_work+0x2f4/0xd78 [ 45.730889][ T50] process_scheduled_works+0x788/0x10b8 [ 45.730899][ T50] worker_thread+0x798/0xbd0 [ 45.730908][ T50] kthread+0x304/0x3d4 [ 45.730915][ T50] ret_from_fork+0x10/0x20 [ 45.730956][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 45.730970][ T50] Bluetooth: hci0: failed to register connection device [ 45.768597][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 45.768612][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 45.768624][ T50] Tainted: [W]=WARN [ 45.768627][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 45.768632][ T50] Workqueue: hci0 hci_rx_work [ 45.768646][ T50] Call trace: [ 45.768649][ T50] show_stack+0x2c/0x3c (C) [ 45.768663][ T50] __dump_stack+0x30/0x40 [ 45.768674][ T50] dump_stack_lvl+0xd8/0x12c [ 45.768684][ T50] dump_stack+0x1c/0x28 [ 45.768694][ T50] sysfs_warn_dup+0x9c/0xb8 [ 45.768704][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 45.768714][ T50] kobject_add_internal+0x290/0x6f0 [ 45.768723][ T50] kobject_add_varg+0x9c/0xe8 [ 45.768730][ T50] kobject_add+0x110/0x1c8 [ 45.768737][ T50] device_add+0x394/0x9e0 [ 45.768745][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 45.768755][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 45.768764][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 45.768772][ T50] hci_le_meta_evt+0x2b0/0x46c [ 45.768782][ T50] hci_event_packet+0x4c0/0x9c8 [ 45.768790][ T50] hci_rx_work+0x2f4/0xd78 [ 45.768797][ T50] process_scheduled_works+0x788/0x10b8 [ 45.768807][ T50] worker_thread+0x798/0xbd0 [ 45.768815][ T50] kthread+0x304/0x3d4 [ 45.768823][ T50] ret_from_fork+0x10/0x20 [ 45.768835][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 45.768846][ T50] Bluetooth: hci0: failed to register connection device [ 45.774160][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 45.774174][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 45.774186][ T50] Tainted: [W]=WARN [ 45.774189][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 45.774194][ T50] Workqueue: hci0 hci_rx_work [ 45.774204][ T50] Call trace: [ 45.774207][ T50] show_stack+0x2c/0x3c (C) [ 45.774220][ T50] __dump_stack+0x30/0x40 [ 45.774230][ T50] dump_stack_lvl+0xd8/0x12c [ 45.774240][ T50] dump_stack+0x1c/0x28 [ 45.774249][ T50] sysfs_warn_dup+0x9c/0xb8 [ 45.774259][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 45.774269][ T50] kobject_add_internal+0x290/0x6f0 [ 45.774277][ T50] kobject_add_varg+0x9c/0xe8 [ 45.774285][ T50] kobject_add+0x110/0x1c8 [ 45.774292][ T50] device_add+0x394/0x9e0 [ 45.774299][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 45.774308][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 45.774317][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 45.774325][ T50] hci_le_meta_evt+0x2b0/0x46c [ 45.774334][ T50] hci_event_packet+0x4c0/0x9c8 [ 45.774343][ T50] hci_rx_work+0x2f4/0xd78 [ 45.774350][ T50] process_scheduled_works+0x788/0x10b8 [ 45.774359][ T50] worker_thread+0x798/0xbd0 [ 45.774367][ T50] kthread+0x304/0x3d4 [ 45.774375][ T50] ret_from_fork+0x10/0x20 [ 45.774388][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 45.774399][ T50] Bluetooth: hci0: failed to register connection device [ 45.796204][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 45.796222][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 45.796235][ T50] Tainted: [W]=WARN [ 45.796238][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 45.796244][ T50] Workqueue: hci0 hci_rx_work [ 45.796259][ T50] Call trace: [ 45.796262][ T50] show_stack+0x2c/0x3c (C) [ 45.796277][ T50] __dump_stack+0x30/0x40 [ 45.796288][ T50] dump_stack_lvl+0xd8/0x12c [ 45.796297][ T50] dump_stack+0x1c/0x28 [ 45.796307][ T50] sysfs_warn_dup+0x9c/0xb8 [ 45.796318][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 45.796328][ T50] kobject_add_internal+0x290/0x6f0 [ 45.796337][ T50] kobject_add_varg+0x9c/0xe8 [ 45.796344][ T50] kobject_add+0x110/0x1c8 [ 45.796351][ T50] device_add+0x394/0x9e0 [ 45.796359][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 45.796368][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 45.796377][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 45.796385][ T50] hci_le_meta_evt+0x2b0/0x46c [ 45.796394][ T50] hci_event_packet+0x4c0/0x9c8 [ 45.796403][ T50] hci_rx_work+0x2f4/0xd78 [ 45.796410][ T50] process_scheduled_works+0x788/0x10b8 [ 45.796420][ T50] worker_thread+0x798/0xbd0 [ 45.796428][ T50] kthread+0x304/0x3d4 [ 45.796436][ T50] ret_from_fork+0x10/0x20 [ 45.796450][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 45.796462][ T50] Bluetooth: hci0: failed to register connection device [ 45.801613][ T4850] netdevsim netdevsim2 netdevsim0: renamed from eth0 [ 45.812297][ T4850] 8021q: adding VLAN 0 to HW filter on device netdevsim0 [ 45.812666][ T4850] netdevsim netdevsim2 netdevsim1: renamed from eth1 [ 45.813845][ T4850] 8021q: adding VLAN 0 to HW filter on device netdevsim1 [ 45.816784][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 45.816800][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 45.816814][ T50] Tainted: [W]=WARN [ 45.816817][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 45.816823][ T50] Workqueue: hci0 hci_rx_work [ 45.816836][ T50] Call trace: [ 45.816839][ T50] show_stack+0x2c/0x3c (C) [ 45.816854][ T50] __dump_stack+0x30/0x40 [ 45.816865][ T50] dump_stack_lvl+0xd8/0x12c [ 45.816875][ T50] dump_stack+0x1c/0x28 [ 45.816884][ T50] sysfs_warn_dup+0x9c/0xb8 [ 45.816895][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 45.816904][ T50] kobject_add_internal+0x290/0x6f0 [ 45.816913][ T50] kobject_add_varg+0x9c/0xe8 [ 45.816921][ T50] kobject_add+0x110/0x1c8 [ 45.816928][ T50] device_add+0x394/0x9e0 [ 45.816935][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 45.816945][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 45.816954][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 45.816962][ T50] hci_le_meta_evt+0x2b0/0x46c [ 45.816972][ T50] hci_event_packet+0x4c0/0x9c8 [ 45.816981][ T50] hci_rx_work+0x2f4/0xd78 [ 45.816988][ T50] process_scheduled_works+0x788/0x10b8 [ 45.816997][ T50] worker_thread+0x798/0xbd0 [ 45.817006][ T50] kthread+0x304/0x3d4 [ 45.817013][ T50] ret_from_fork+0x10/0x20 [ 45.817026][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 45.817037][ T50] Bluetooth: hci0: failed to register connection device [ 45.837149][ T4850] netdevsim netdevsim2 netdevsim2: renamed from eth2 [ 45.839552][ T4850] 8021q: adding VLAN 0 to HW filter on device netdevsim2 [ 45.839885][ T4850] netdevsim netdevsim2 netdevsim3: renamed from eth3 [ 45.844262][ T4850] 8021q: adding VLAN 0 to HW filter on device netdevsim3 [ 45.857256][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 45.857273][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 45.857286][ T50] Tainted: [W]=WARN [ 45.857289][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 45.857294][ T50] Workqueue: hci0 hci_rx_work [ 45.857308][ T50] Call trace: [ 45.857311][ T50] show_stack+0x2c/0x3c (C) [ 45.857326][ T50] __dump_stack+0x30/0x40 [ 45.857336][ T50] dump_stack_lvl+0xd8/0x12c [ 45.857346][ T50] dump_stack+0x1c/0x28 [ 45.857356][ T50] sysfs_warn_dup+0x9c/0xb8 [ 45.857366][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 45.857376][ T50] kobject_add_internal+0x290/0x6f0 [ 45.857385][ T50] kobject_add_varg+0x9c/0xe8 [ 45.857392][ T50] kobject_add+0x110/0x1c8 [ 45.857399][ T50] device_add+0x394/0x9e0 [ 45.857407][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 45.857417][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 45.857426][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 45.857434][ T50] hci_le_meta_evt+0x2b0/0x46c [ 45.857443][ T50] hci_event_packet+0x4c0/0x9c8 [ 45.857452][ T50] hci_rx_work+0x2f4/0xd78 [ 45.857459][ T50] process_scheduled_works+0x788/0x10b8 [ 45.857468][ T50] worker_thread+0x798/0xbd0 [ 45.857477][ T50] kthread+0x304/0x3d4 [ 45.857484][ T50] ret_from_fork+0x10/0x20 [ 45.857497][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 45.857508][ T50] Bluetooth: hci0: failed to register connection device [ 45.869407][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 45.869421][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 45.869433][ T50] Tainted: [W]=WARN [ 45.869436][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 45.869441][ T50] Workqueue: hci0 hci_rx_work [ 45.869453][ T50] Call trace: [ 45.869456][ T50] show_stack+0x2c/0x3c (C) [ 45.869469][ T50] __dump_stack+0x30/0x40 [ 45.869479][ T50] dump_stack_lvl+0xd8/0x12c [ 45.869489][ T50] dump_stack+0x1c/0x28 [ 45.869498][ T50] sysfs_warn_dup+0x9c/0xb8 [ 45.869508][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 45.869518][ T50] kobject_add_internal+0x290/0x6f0 [ 45.869526][ T50] kobject_add_varg+0x9c/0xe8 [ 45.869534][ T50] kobject_add+0x110/0x1c8 [ 45.869541][ T50] device_add+0x394/0x9e0 [ 45.869548][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 45.869558][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 45.869566][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 45.869574][ T50] hci_le_meta_evt+0x2b0/0x46c [ 45.869584][ T50] hci_event_packet+0x4c0/0x9c8 [ 45.869592][ T50] hci_rx_work+0x2f4/0xd78 [ 45.869599][ T50] process_scheduled_works+0x788/0x10b8 [ 45.869608][ T50] worker_thread+0x798/0xbd0 [ 45.869617][ T50] kthread+0x304/0x3d4 [ 45.869624][ T50] ret_from_fork+0x10/0x20 [ 45.869637][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 45.869648][ T50] Bluetooth: hci0: failed to register connection device [ 45.878285][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 45.878298][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 45.878309][ T50] Tainted: [W]=WARN [ 45.878312][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 45.878317][ T50] Workqueue: hci0 hci_rx_work [ 45.878328][ T50] Call trace: [ 45.878331][ T50] show_stack+0x2c/0x3c (C) [ 45.878343][ T50] __dump_stack+0x30/0x40 [ 45.878353][ T50] dump_stack_lvl+0xd8/0x12c [ 45.878363][ T50] dump_stack+0x1c/0x28 [ 45.878373][ T50] sysfs_warn_dup+0x9c/0xb8 [ 45.878383][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 45.878392][ T50] kobject_add_internal+0x290/0x6f0 [ 45.878401][ T50] kobject_add_varg+0x9c/0xe8 [ 45.878408][ T50] kobject_add+0x110/0x1c8 [ 45.878415][ T50] device_add+0x394/0x9e0 [ 45.878423][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 45.878432][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 45.878441][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 45.878449][ T50] hci_le_meta_evt+0x2b0/0x46c [ 45.878458][ T50] hci_event_packet+0x4c0/0x9c8 [ 45.878467][ T50] hci_rx_work+0x2f4/0xd78 [ 45.878474][ T50] process_scheduled_works+0x788/0x10b8 [ 45.878483][ T50] worker_thread+0x798/0xbd0 [ 45.878491][ T50] kthread+0x304/0x3d4 [ 45.878499][ T50] ret_from_fork+0x10/0x20 [ 45.878511][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 45.878522][ T50] Bluetooth: hci0: failed to register connection device [ 45.895618][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 45.895632][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 45.895644][ T50] Tainted: [W]=WARN [ 45.895647][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 45.895652][ T50] Workqueue: hci0 hci_rx_work [ 45.895665][ T50] Call trace: [ 45.895668][ T50] show_stack+0x2c/0x3c (C) [ 45.895682][ T50] __dump_stack+0x30/0x40 [ 45.895693][ T50] dump_stack_lvl+0xd8/0x12c [ 45.895702][ T50] dump_stack+0x1c/0x28 [ 45.895712][ T50] sysfs_warn_dup+0x9c/0xb8 [ 45.895722][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 45.895732][ T50] kobject_add_internal+0x290/0x6f0 [ 45.895741][ T50] kobject_add_varg+0x9c/0xe8 [ 45.895748][ T50] kobject_add+0x110/0x1c8 [ 45.895755][ T50] device_add+0x394/0x9e0 [ 45.895763][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 45.895772][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 45.895781][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 45.895789][ T50] hci_le_meta_evt+0x2b0/0x46c [ 45.895799][ T50] hci_event_packet+0x4c0/0x9c8 [ 45.895807][ T50] hci_rx_work+0x2f4/0xd78 [ 45.895814][ T50] process_scheduled_works+0x788/0x10b8 [ 45.895824][ T50] worker_thread+0x798/0xbd0 [ 45.895832][ T50] kthread+0x304/0x3d4 [ 45.895840][ T50] ret_from_fork+0x10/0x20 [ 45.895852][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 45.895865][ T50] Bluetooth: hci0: failed to register connection device [ 45.916667][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 45.916683][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 45.916695][ T50] Tainted: [W]=WARN [ 45.916698][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 45.916703][ T50] Workqueue: hci0 hci_rx_work [ 45.916717][ T50] Call trace: [ 45.916719][ T50] show_stack+0x2c/0x3c (C) [ 45.916735][ T50] __dump_stack+0x30/0x40 [ 45.916747][ T50] dump_stack_lvl+0xd8/0x12c [ 45.916757][ T50] dump_stack+0x1c/0x28 [ 45.916766][ T50] sysfs_warn_dup+0x9c/0xb8 [ 45.916778][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 45.916787][ T50] kobject_add_internal+0x290/0x6f0 [ 45.916797][ T50] kobject_add_varg+0x9c/0xe8 [ 45.916804][ T50] kobject_add+0x110/0x1c8 [ 45.916811][ T50] device_add+0x394/0x9e0 [ 45.916819][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 45.916829][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 45.916838][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 45.916846][ T50] hci_le_meta_evt+0x2b0/0x46c [ 45.916857][ T50] hci_event_packet+0x4c0/0x9c8 [ 45.916865][ T50] hci_rx_work+0x2f4/0xd78 [ 45.916872][ T50] process_scheduled_works+0x788/0x10b8 [ 45.916882][ T50] worker_thread+0x798/0xbd0 [ 45.916891][ T50] kthread+0x304/0x3d4 [ 45.916898][ T50] ret_from_fork+0x10/0x20 [ 45.916913][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 45.916926][ T50] Bluetooth: hci0: failed to register connection device [ 45.930267][ T50] Bluetooth: hci1: command tx timeout [ 45.931955][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 45.931968][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 45.931979][ T50] Tainted: [W]=WARN [ 45.931982][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 45.931987][ T50] Workqueue: hci0 hci_rx_work [ 45.931999][ T50] Call trace: [ 45.932002][ T50] show_stack+0x2c/0x3c (C) [ 45.932016][ T50] __dump_stack+0x30/0x40 [ 45.932026][ T50] dump_stack_lvl+0xd8/0x12c [ 45.932036][ T50] dump_stack+0x1c/0x28 [ 45.932046][ T50] sysfs_warn_dup+0x9c/0xb8 [ 45.932056][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 45.932066][ T50] kobject_add_internal+0x290/0x6f0 [ 45.932074][ T50] kobject_add_varg+0x9c/0xe8 [ 45.932082][ T50] kobject_add+0x110/0x1c8 [ 45.932088][ T50] device_add+0x394/0x9e0 [ 45.932096][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 45.932106][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 45.932125][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 45.932134][ T50] hci_le_meta_evt+0x2b0/0x46c [ 45.932144][ T50] hci_event_packet+0x4c0/0x9c8 [ 45.932153][ T50] hci_rx_work+0x2f4/0xd78 [ 45.932160][ T50] process_scheduled_works+0x788/0x10b8 [ 45.932170][ T50] worker_thread+0x798/0xbd0 [ 45.932178][ T50] kthread+0x304/0x3d4 [ 45.932186][ T50] ret_from_fork+0x10/0x20 [ 45.932199][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 45.932211][ T50] Bluetooth: hci0: failed to register connection device [ 45.948144][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 45.948161][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 45.948175][ T50] Tainted: [W]=WARN [ 45.948178][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 45.948183][ T50] Workqueue: hci0 hci_rx_work [ 45.948198][ T50] Call trace: [ 45.948201][ T50] show_stack+0x2c/0x3c (C) [ 45.948217][ T50] __dump_stack+0x30/0x40 [ 45.948229][ T50] dump_stack_lvl+0xd8/0x12c [ 45.948239][ T50] dump_stack+0x1c/0x28 [ 45.948248][ T50] sysfs_warn_dup+0x9c/0xb8 [ 45.948259][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 45.948269][ T50] kobject_add_internal+0x290/0x6f0 [ 45.948278][ T50] kobject_add_varg+0x9c/0xe8 [ 45.948285][ T50] kobject_add+0x110/0x1c8 [ 45.948292][ T50] device_add+0x394/0x9e0 [ 45.948300][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 45.948310][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 45.948319][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 45.948327][ T50] hci_le_meta_evt+0x2b0/0x46c [ 45.948336][ T50] hci_event_packet+0x4c0/0x9c8 [ 45.948345][ T50] hci_rx_work+0x2f4/0xd78 [ 45.948352][ T50] process_scheduled_works+0x788/0x10b8 [ 45.948361][ T50] worker_thread+0x798/0xbd0 [ 45.948370][ T50] kthread+0x304/0x3d4 [ 45.948377][ T50] ret_from_fork+0x10/0x20 [ 45.948390][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 45.948401][ T50] Bluetooth: hci0: failed to register connection device [ 45.962608][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 45.962625][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 45.962638][ T50] Tainted: [W]=WARN [ 45.962642][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 45.962647][ T50] Workqueue: hci0 hci_rx_work [ 45.962660][ T50] Call trace: [ 45.962662][ T50] show_stack+0x2c/0x3c (C) [ 45.962677][ T50] __dump_stack+0x30/0x40 [ 45.962689][ T50] dump_stack_lvl+0xd8/0x12c [ 45.962699][ T50] dump_stack+0x1c/0x28 [ 45.962708][ T50] sysfs_warn_dup+0x9c/0xb8 [ 45.962719][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 45.962729][ T50] kobject_add_internal+0x290/0x6f0 [ 45.962738][ T50] kobject_add_varg+0x9c/0xe8 [ 45.962745][ T50] kobject_add+0x110/0x1c8 [ 45.962752][ T50] device_add+0x394/0x9e0 [ 45.962760][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 45.962770][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 45.962778][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 45.962787][ T50] hci_le_meta_evt+0x2b0/0x46c [ 45.962796][ T50] hci_event_packet+0x4c0/0x9c8 [ 45.962805][ T50] hci_rx_work+0x2f4/0xd78 [ 45.962812][ T50] process_scheduled_works+0x788/0x10b8 [ 45.962821][ T50] worker_thread+0x798/0xbd0 [ 45.962830][ T50] kthread+0x304/0x3d4 [ 45.962837][ T50] ret_from_fork+0x10/0x20 [ 45.962850][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 45.962862][ T50] Bluetooth: hci0: failed to register connection device [ 45.979549][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 45.979564][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 45.979575][ T50] Tainted: [W]=WARN [ 45.979578][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 45.979583][ T50] Workqueue: hci0 hci_rx_work [ 45.979597][ T50] Call trace: [ 45.979599][ T50] show_stack+0x2c/0x3c (C) [ 45.979614][ T50] __dump_stack+0x30/0x40 [ 45.979624][ T50] dump_stack_lvl+0xd8/0x12c [ 45.979634][ T50] dump_stack+0x1c/0x28 [ 45.979643][ T50] sysfs_warn_dup+0x9c/0xb8 [ 45.979654][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 45.979663][ T50] kobject_add_internal+0x290/0x6f0 [ 45.979672][ T50] kobject_add_varg+0x9c/0xe8 [ 45.979680][ T50] kobject_add+0x110/0x1c8 [ 45.979686][ T50] device_add+0x394/0x9e0 [ 45.979694][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 45.979704][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 45.979712][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 45.979720][ T50] hci_le_meta_evt+0x2b0/0x46c [ 45.979730][ T50] hci_event_packet+0x4c0/0x9c8 [ 45.979738][ T50] hci_rx_work+0x2f4/0xd78 [ 45.979745][ T50] process_scheduled_works+0x788/0x10b8 [ 45.979755][ T50] worker_thread+0x798/0xbd0 [ 45.979763][ T50] kthread+0x304/0x3d4 [ 45.979771][ T50] ret_from_fork+0x10/0x20 [ 45.979784][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 45.979795][ T50] Bluetooth: hci0: failed to register connection device [ 45.994572][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 45.994585][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 45.994597][ T50] Tainted: [W]=WARN [ 45.994600][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 45.994605][ T50] Workqueue: hci0 hci_rx_work [ 45.994617][ T50] Call trace: [ 45.994620][ T50] show_stack+0x2c/0x3c (C) [ 45.994634][ T50] __dump_stack+0x30/0x40 [ 45.994646][ T50] dump_stack_lvl+0xd8/0x12c [ 45.994656][ T50] dump_stack+0x1c/0x28 [ 45.994665][ T50] sysfs_warn_dup+0x9c/0xb8 [ 45.994676][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 45.994686][ T50] kobject_add_internal+0x290/0x6f0 [ 45.994695][ T50] kobject_add_varg+0x9c/0xe8 [ 45.994702][ T50] kobject_add+0x110/0x1c8 [ 45.994709][ T50] device_add+0x394/0x9e0 [ 45.994717][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 45.994726][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 45.994736][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 45.994744][ T50] hci_le_meta_evt+0x2b0/0x46c [ 45.994753][ T50] hci_event_packet+0x4c0/0x9c8 [ 45.994762][ T50] hci_rx_work+0x2f4/0xd78 [ 45.994768][ T50] process_scheduled_works+0x788/0x10b8 [ 45.994778][ T50] worker_thread+0x798/0xbd0 [ 45.994786][ T50] kthread+0x304/0x3d4 [ 45.994794][ T50] ret_from_fork+0x10/0x20 [ 45.994807][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 45.994819][ T50] Bluetooth: hci0: failed to register connection device [ 46.024290][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 46.024309][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 46.024322][ T50] Tainted: [W]=WARN [ 46.024326][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 46.024332][ T50] Workqueue: hci0 hci_rx_work [ 46.024346][ T50] Call trace: [ 46.024350][ T50] show_stack+0x2c/0x3c (C) [ 46.024365][ T50] __dump_stack+0x30/0x40 [ 46.024376][ T50] dump_stack_lvl+0xd8/0x12c [ 46.024386][ T50] dump_stack+0x1c/0x28 [ 46.024395][ T50] sysfs_warn_dup+0x9c/0xb8 [ 46.024406][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 46.024416][ T50] kobject_add_internal+0x290/0x6f0 [ 46.024425][ T50] kobject_add_varg+0x9c/0xe8 [ 46.024433][ T50] kobject_add+0x110/0x1c8 [ 46.024440][ T50] device_add+0x394/0x9e0 [ 46.024448][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 46.024458][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 46.024467][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 46.024475][ T50] hci_le_meta_evt+0x2b0/0x46c [ 46.024484][ T50] hci_event_packet+0x4c0/0x9c8 [ 46.024493][ T50] hci_rx_work+0x2f4/0xd78 [ 46.024500][ T50] process_scheduled_works+0x788/0x10b8 [ 46.024510][ T50] worker_thread+0x798/0xbd0 [ 46.024518][ T50] kthread+0x304/0x3d4 [ 46.024526][ T50] ret_from_fork+0x10/0x20 [ 46.024539][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 46.024550][ T50] Bluetooth: hci0: failed to register connection device [ 46.029562][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 46.029573][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 46.029585][ T50] Tainted: [W]=WARN [ 46.029588][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 46.029593][ T50] Workqueue: hci0 hci_rx_work [ 46.029603][ T50] Call trace: [ 46.029605][ T50] show_stack+0x2c/0x3c (C) [ 46.029617][ T50] __dump_stack+0x30/0x40 [ 46.029627][ T50] dump_stack_lvl+0xd8/0x12c [ 46.029637][ T50] dump_stack+0x1c/0x28 [ 46.029647][ T50] sysfs_warn_dup+0x9c/0xb8 [ 46.029656][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 46.029666][ T50] kobject_add_internal+0x290/0x6f0 [ 46.029674][ T50] kobject_add_varg+0x9c/0xe8 [ 46.029681][ T50] kobject_add+0x110/0x1c8 [ 46.029688][ T50] device_add+0x394/0x9e0 [ 46.029695][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 46.029705][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 46.029713][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 46.029721][ T50] hci_le_meta_evt+0x2b0/0x46c [ 46.029730][ T50] hci_event_packet+0x4c0/0x9c8 [ 46.029739][ T50] hci_rx_work+0x2f4/0xd78 [ 46.029746][ T50] process_scheduled_works+0x788/0x10b8 [ 46.029755][ T50] worker_thread+0x798/0xbd0 [ 46.029763][ T50] kthread+0x304/0x3d4 [ 46.029771][ T50] ret_from_fork+0x10/0x20 [ 46.029783][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 46.029794][ T50] Bluetooth: hci0: failed to register connection device [ 46.059523][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 46.059539][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 46.059551][ T50] Tainted: [W]=WARN [ 46.059555][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 46.059560][ T50] Workqueue: hci0 hci_rx_work [ 46.059575][ T50] Call trace: [ 46.059578][ T50] show_stack+0x2c/0x3c (C) [ 46.059593][ T50] __dump_stack+0x30/0x40 [ 46.059604][ T50] dump_stack_lvl+0xd8/0x12c [ 46.059614][ T50] dump_stack+0x1c/0x28 [ 46.059624][ T50] sysfs_warn_dup+0x9c/0xb8 [ 46.059634][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 46.059644][ T50] kobject_add_internal+0x290/0x6f0 [ 46.059653][ T50] kobject_add_varg+0x9c/0xe8 [ 46.059661][ T50] kobject_add+0x110/0x1c8 [ 46.059668][ T50] device_add+0x394/0x9e0 [ 46.059675][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 46.059685][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 46.059694][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 46.059702][ T50] hci_le_meta_evt+0x2b0/0x46c [ 46.059711][ T50] hci_event_packet+0x4c0/0x9c8 [ 46.059720][ T50] hci_rx_work+0x2f4/0xd78 [ 46.059727][ T50] process_scheduled_works+0x788/0x10b8 [ 46.059737][ T50] worker_thread+0x798/0xbd0 [ 46.059745][ T50] kthread+0x304/0x3d4 [ 46.059753][ T50] ret_from_fork+0x10/0x20 [ 46.059766][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 46.059777][ T50] Bluetooth: hci0: failed to register connection device [ 46.074535][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 46.074550][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 46.074562][ T50] Tainted: [W]=WARN [ 46.074565][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 46.074570][ T50] Workqueue: hci0 hci_rx_work [ 46.074583][ T50] Call trace: [ 46.074586][ T50] show_stack+0x2c/0x3c (C) [ 46.074600][ T50] __dump_stack+0x30/0x40 [ 46.074610][ T50] dump_stack_lvl+0xd8/0x12c [ 46.074620][ T50] dump_stack+0x1c/0x28 [ 46.074629][ T50] sysfs_warn_dup+0x9c/0xb8 [ 46.074640][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 46.074649][ T50] kobject_add_internal+0x290/0x6f0 [ 46.074658][ T50] kobject_add_varg+0x9c/0xe8 [ 46.074665][ T50] kobject_add+0x110/0x1c8 [ 46.074672][ T50] device_add+0x394/0x9e0 [ 46.074679][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 46.074689][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 46.074697][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 46.074706][ T50] hci_le_meta_evt+0x2b0/0x46c [ 46.074715][ T50] hci_event_packet+0x4c0/0x9c8 [ 46.074723][ T50] hci_rx_work+0x2f4/0xd78 [ 46.074730][ T50] process_scheduled_works+0x788/0x10b8 [ 46.074739][ T50] worker_thread+0x798/0xbd0 [ 46.074748][ T50] kthread+0x304/0x3d4 [ 46.074755][ T50] ret_from_fork+0x10/0x20 [ 46.074768][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 46.074780][ T50] Bluetooth: hci0: failed to register connection device [ 46.079907][ T4857] netdevsim netdevsim4 netdevsim0: renamed from eth0 [ 46.085852][ T4857] 8021q: adding VLAN 0 to HW filter on device netdevsim0 [ 46.086817][ T4857] netdevsim netdevsim4 netdevsim1: renamed from eth1 [ 46.105593][ T4857] 8021q: adding VLAN 0 to HW filter on device netdevsim1 [ 46.131563][ T4857] netdevsim netdevsim4 netdevsim2: renamed from eth2 [ 46.132875][ T4857] 8021q: adding VLAN 0 to HW filter on device netdevsim2 [ 46.153101][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 46.153122][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 46.153136][ T50] Tainted: [W]=WARN [ 46.153140][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 46.153147][ T50] Workqueue: hci0 hci_rx_work [ 46.153164][ T50] Call trace: [ 46.153168][ T50] show_stack+0x2c/0x3c (C) [ 46.153184][ T50] __dump_stack+0x30/0x40 [ 46.153196][ T50] dump_stack_lvl+0xd8/0x12c [ 46.153206][ T50] dump_stack+0x1c/0x28 [ 46.153216][ T50] sysfs_warn_dup+0x9c/0xb8 [ 46.153228][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 46.153237][ T50] kobject_add_internal+0x290/0x6f0 [ 46.153247][ T50] kobject_add_varg+0x9c/0xe8 [ 46.153254][ T50] kobject_add+0x110/0x1c8 [ 46.153261][ T50] device_add+0x394/0x9e0 [ 46.153269][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 46.153278][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 46.153287][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 46.153295][ T50] hci_le_meta_evt+0x2b0/0x46c [ 46.153305][ T50] hci_event_packet+0x4c0/0x9c8 [ 46.153314][ T50] hci_rx_work+0x2f4/0xd78 [ 46.153321][ T50] process_scheduled_works+0x788/0x10b8 [ 46.153330][ T50] worker_thread+0x798/0xbd0 [ 46.153339][ T50] kthread+0x304/0x3d4 [ 46.153347][ T50] ret_from_fork+0x10/0x20 [ 46.153359][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 46.153370][ T50] Bluetooth: hci0: failed to register connection device [ 46.164329][ T4857] netdevsim netdevsim4 netdevsim3: renamed from eth3 [ 46.166024][ T4857] 8021q: adding VLAN 0 to HW filter on device netdevsim3 [ 46.184659][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 46.184675][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 46.184688][ T50] Tainted: [W]=WARN [ 46.184691][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 46.184696][ T50] Workqueue: hci0 hci_rx_work [ 46.184711][ T50] Call trace: [ 46.184714][ T50] show_stack+0x2c/0x3c (C) [ 46.184729][ T50] __dump_stack+0x30/0x40 [ 46.184740][ T50] dump_stack_lvl+0xd8/0x12c [ 46.184750][ T50] dump_stack+0x1c/0x28 [ 46.184759][ T50] sysfs_warn_dup+0x9c/0xb8 [ 46.184770][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 46.184779][ T50] kobject_add_internal+0x290/0x6f0 [ 46.184789][ T50] kobject_add_varg+0x9c/0xe8 [ 46.184796][ T50] kobject_add+0x110/0x1c8 [ 46.184803][ T50] device_add+0x394/0x9e0 [ 46.184811][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 46.184821][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 46.184830][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 46.184838][ T50] hci_le_meta_evt+0x2b0/0x46c [ 46.184848][ T50] hci_event_packet+0x4c0/0x9c8 [ 46.184857][ T50] hci_rx_work+0x2f4/0xd78 [ 46.184864][ T50] process_scheduled_works+0x788/0x10b8 [ 46.184873][ T50] worker_thread+0x798/0xbd0 [ 46.184882][ T50] kthread+0x304/0x3d4 [ 46.184890][ T50] ret_from_fork+0x10/0x20 [ 46.184903][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 46.184914][ T50] Bluetooth: hci0: failed to register connection device [ 46.200033][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 46.200050][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 46.200062][ T50] Tainted: [W]=WARN [ 46.200066][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 46.200071][ T50] Workqueue: hci0 hci_rx_work [ 46.200089][ T50] Call trace: [ 46.200092][ T50] show_stack+0x2c/0x3c (C) [ 46.200113][ T50] __dump_stack+0x30/0x40 [ 46.200126][ T50] dump_stack_lvl+0xd8/0x12c [ 46.200136][ T50] dump_stack+0x1c/0x28 [ 46.200146][ T50] sysfs_warn_dup+0x9c/0xb8 [ 46.200157][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 46.200166][ T50] kobject_add_internal+0x290/0x6f0 [ 46.200175][ T50] kobject_add_varg+0x9c/0xe8 [ 46.200183][ T50] kobject_add+0x110/0x1c8 [ 46.200189][ T50] device_add+0x394/0x9e0 [ 46.200197][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 46.200208][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 46.200216][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 46.200225][ T50] hci_le_meta_evt+0x2b0/0x46c [ 46.200234][ T50] hci_event_packet+0x4c0/0x9c8 [ 46.200243][ T50] hci_rx_work+0x2f4/0xd78 [ 46.200250][ T50] process_scheduled_works+0x788/0x10b8 [ 46.200259][ T50] worker_thread+0x798/0xbd0 [ 46.200268][ T50] kthread+0x304/0x3d4 [ 46.200276][ T50] ret_from_fork+0x10/0x20 [ 46.202371][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 46.202389][ T50] Bluetooth: hci0: failed to register connection device [ 46.215041][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 46.215056][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 46.215069][ T50] Tainted: [W]=WARN [ 46.215072][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 46.215077][ T50] Workqueue: hci0 hci_rx_work [ 46.215091][ T50] Call trace: [ 46.215094][ T50] show_stack+0x2c/0x3c (C) [ 46.215114][ T50] __dump_stack+0x30/0x40 [ 46.215125][ T50] dump_stack_lvl+0xd8/0x12c [ 46.215135][ T50] dump_stack+0x1c/0x28 [ 46.215145][ T50] sysfs_warn_dup+0x9c/0xb8 [ 46.215156][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 46.215165][ T50] kobject_add_internal+0x290/0x6f0 [ 46.215175][ T50] kobject_add_varg+0x9c/0xe8 [ 46.215182][ T50] kobject_add+0x110/0x1c8 [ 46.215189][ T50] device_add+0x394/0x9e0 [ 46.215197][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 46.215206][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 46.215215][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 46.215223][ T50] hci_le_meta_evt+0x2b0/0x46c [ 46.215233][ T50] hci_event_packet+0x4c0/0x9c8 [ 46.215241][ T50] hci_rx_work+0x2f4/0xd78 [ 46.215248][ T50] process_scheduled_works+0x788/0x10b8 [ 46.215257][ T50] worker_thread+0x798/0xbd0 [ 46.215266][ T50] kthread+0x304/0x3d4 [ 46.215273][ T50] ret_from_fork+0x10/0x20 [ 46.215286][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 46.215298][ T50] Bluetooth: hci0: failed to register connection device [ 46.235125][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 46.235141][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 46.235153][ T50] Tainted: [W]=WARN [ 46.235156][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 46.235160][ T50] Workqueue: hci0 hci_rx_work [ 46.235174][ T50] Call trace: [ 46.235176][ T50] show_stack+0x2c/0x3c (C) [ 46.235191][ T50] __dump_stack+0x30/0x40 [ 46.235202][ T50] dump_stack_lvl+0xd8/0x12c [ 46.235211][ T50] dump_stack+0x1c/0x28 [ 46.235221][ T50] sysfs_warn_dup+0x9c/0xb8 [ 46.235231][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 46.235241][ T50] kobject_add_internal+0x290/0x6f0 [ 46.235250][ T50] kobject_add_varg+0x9c/0xe8 [ 46.235257][ T50] kobject_add+0x110/0x1c8 [ 46.235264][ T50] device_add+0x394/0x9e0 [ 46.235272][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 46.235281][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 46.235290][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 46.235298][ T50] hci_le_meta_evt+0x2b0/0x46c [ 46.235307][ T50] hci_event_packet+0x4c0/0x9c8 [ 46.235316][ T50] hci_rx_work+0x2f4/0xd78 [ 46.235323][ T50] process_scheduled_works+0x788/0x10b8 [ 46.235332][ T50] worker_thread+0x798/0xbd0 [ 46.235341][ T50] kthread+0x304/0x3d4 [ 46.235349][ T50] ret_from_fork+0x10/0x20 [ 46.235362][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 46.235374][ T50] Bluetooth: hci0: failed to register connection device [ 46.271635][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 46.271652][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 46.271664][ T50] Tainted: [W]=WARN [ 46.271667][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 46.271672][ T50] Workqueue: hci0 hci_rx_work [ 46.271686][ T50] Call trace: [ 46.271690][ T50] show_stack+0x2c/0x3c (C) [ 46.271704][ T50] __dump_stack+0x30/0x40 [ 46.271716][ T50] dump_stack_lvl+0xd8/0x12c [ 46.271726][ T50] dump_stack+0x1c/0x28 [ 46.271735][ T50] sysfs_warn_dup+0x9c/0xb8 [ 46.271747][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 46.271757][ T50] kobject_add_internal+0x290/0x6f0 [ 46.271766][ T50] kobject_add_varg+0x9c/0xe8 [ 46.271774][ T50] kobject_add+0x110/0x1c8 [ 46.271781][ T50] device_add+0x394/0x9e0 [ 46.271789][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 46.271798][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 46.271807][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 46.271816][ T50] hci_le_meta_evt+0x2b0/0x46c [ 46.271825][ T50] hci_event_packet+0x4c0/0x9c8 [ 46.271834][ T50] hci_rx_work+0x2f4/0xd78 [ 46.271841][ T50] process_scheduled_works+0x788/0x10b8 [ 46.271851][ T50] worker_thread+0x798/0xbd0 [ 46.271859][ T50] kthread+0x304/0x3d4 [ 46.271867][ T50] ret_from_fork+0x10/0x20 [ 46.271879][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 46.271891][ T50] Bluetooth: hci0: failed to register connection device [ 46.283878][ T4852] netdevsim netdevsim3 netdevsim0: renamed from eth0 [ 46.289917][ T4852] 8021q: adding VLAN 0 to HW filter on device netdevsim0 [ 46.307514][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 46.307529][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 46.307542][ T50] Tainted: [W]=WARN [ 46.307545][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 46.307550][ T50] Workqueue: hci0 hci_rx_work [ 46.307565][ T50] Call trace: [ 46.307568][ T50] show_stack+0x2c/0x3c (C) [ 46.307583][ T50] __dump_stack+0x30/0x40 [ 46.307593][ T50] dump_stack_lvl+0xd8/0x12c [ 46.307603][ T50] dump_stack+0x1c/0x28 [ 46.307613][ T50] sysfs_warn_dup+0x9c/0xb8 [ 46.307624][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 46.307634][ T50] kobject_add_internal+0x290/0x6f0 [ 46.307643][ T50] kobject_add_varg+0x9c/0xe8 [ 46.307650][ T50] kobject_add+0x110/0x1c8 [ 46.307657][ T50] device_add+0x394/0x9e0 [ 46.307665][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 46.307675][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 46.307683][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 46.307692][ T50] hci_le_meta_evt+0x2b0/0x46c [ 46.307701][ T50] hci_event_packet+0x4c0/0x9c8 [ 46.307710][ T50] hci_rx_work+0x2f4/0xd78 [ 46.307717][ T50] process_scheduled_works+0x788/0x10b8 [ 46.307727][ T50] worker_thread+0x798/0xbd0 [ 46.307735][ T50] kthread+0x304/0x3d4 [ 46.307743][ T50] ret_from_fork+0x10/0x20 [ 46.307756][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 46.307767][ T50] Bluetooth: hci0: failed to register connection device [ 46.317870][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 46.317884][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 46.317895][ T50] Tainted: [W]=WARN [ 46.317898][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 46.317903][ T50] Workqueue: hci0 hci_rx_work [ 46.317914][ T50] Call trace: [ 46.317917][ T50] show_stack+0x2c/0x3c (C) [ 46.317931][ T50] __dump_stack+0x30/0x40 [ 46.317941][ T50] dump_stack_lvl+0xd8/0x12c [ 46.317951][ T50] dump_stack+0x1c/0x28 [ 46.317960][ T50] sysfs_warn_dup+0x9c/0xb8 [ 46.317971][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 46.317980][ T50] kobject_add_internal+0x290/0x6f0 [ 46.317989][ T50] kobject_add_varg+0x9c/0xe8 [ 46.317996][ T50] kobject_add+0x110/0x1c8 [ 46.318003][ T50] device_add+0x394/0x9e0 [ 46.318011][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 46.318021][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 46.318029][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 46.318038][ T50] hci_le_meta_evt+0x2b0/0x46c [ 46.318047][ T50] hci_event_packet+0x4c0/0x9c8 [ 46.318056][ T50] hci_rx_work+0x2f4/0xd78 [ 46.318062][ T50] process_scheduled_works+0x788/0x10b8 [ 46.318072][ T50] worker_thread+0x798/0xbd0 [ 46.318080][ T50] kthread+0x304/0x3d4 [ 46.318088][ T50] ret_from_fork+0x10/0x20 [ 46.318103][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 46.318122][ T50] Bluetooth: hci0: failed to register connection device [ 46.332324][ T4841] netdevsim netdevsim1 netdevsim0: renamed from eth0 [ 46.337433][ T4841] 8021q: adding VLAN 0 to HW filter on device netdevsim0 [ 46.339123][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 46.339139][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 46.339156][ T50] Tainted: [W]=WARN [ 46.339160][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 46.339167][ T50] Workqueue: hci0 hci_rx_work [ 46.339183][ T50] Call trace: [ 46.339187][ T50] show_stack+0x2c/0x3c (C) [ 46.339203][ T50] __dump_stack+0x30/0x40 [ 46.339215][ T50] dump_stack_lvl+0xd8/0x12c [ 46.339225][ T50] dump_stack+0x1c/0x28 [ 46.339235][ T50] sysfs_warn_dup+0x9c/0xb8 [ 46.339246][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 46.339256][ T50] kobject_add_internal+0x290/0x6f0 [ 46.339266][ T50] kobject_add_varg+0x9c/0xe8 [ 46.339273][ T50] kobject_add+0x110/0x1c8 [ 46.339280][ T50] device_add+0x394/0x9e0 [ 46.339289][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 46.339299][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 46.339308][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 46.339316][ T50] hci_le_meta_evt+0x2b0/0x46c [ 46.339326][ T50] hci_event_packet+0x4c0/0x9c8 [ 46.339335][ T50] hci_rx_work+0x2f4/0xd78 [ 46.339341][ T50] process_scheduled_works+0x788/0x10b8 [ 46.339351][ T50] worker_thread+0x798/0xbd0 [ 46.339360][ T50] kthread+0x304/0x3d4 [ 46.339367][ T50] ret_from_fork+0x10/0x20 [ 46.339380][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 46.339391][ T50] Bluetooth: hci0: failed to register connection device [ 46.346131][ T4852] netdevsim netdevsim3 netdevsim1: renamed from eth1 [ 46.351006][ T4852] 8021q: adding VLAN 0 to HW filter on device netdevsim1 [ 46.355647][ T4841] netdevsim netdevsim1 netdevsim1: renamed from eth1 [ 46.359105][ T4841] 8021q: adding VLAN 0 to HW filter on device netdevsim1 [ 46.359605][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 46.359617][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 46.359629][ T50] Tainted: [W]=WARN [ 46.359633][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 46.359638][ T50] Workqueue: hci0 hci_rx_work [ 46.359652][ T50] Call trace: [ 46.359655][ T50] show_stack+0x2c/0x3c (C) [ 46.359670][ T50] __dump_stack+0x30/0x40 [ 46.359682][ T50] dump_stack_lvl+0xd8/0x12c [ 46.359692][ T50] dump_stack+0x1c/0x28 [ 46.359702][ T50] sysfs_warn_dup+0x9c/0xb8 [ 46.359713][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 46.359723][ T50] kobject_add_internal+0x290/0x6f0 [ 46.359732][ T50] kobject_add_varg+0x9c/0xe8 [ 46.359739][ T50] kobject_add+0x110/0x1c8 [ 46.359746][ T50] device_add+0x394/0x9e0 [ 46.359754][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 46.359764][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 46.359773][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 46.359781][ T50] hci_le_meta_evt+0x2b0/0x46c [ 46.359791][ T50] hci_event_packet+0x4c0/0x9c8 [ 46.359799][ T50] hci_rx_work+0x2f4/0xd78 [ 46.359806][ T50] process_scheduled_works+0x788/0x10b8 [ 46.359816][ T50] worker_thread+0x798/0xbd0 [ 46.359824][ T50] kthread+0x304/0x3d4 [ 46.359832][ T50] ret_from_fork+0x10/0x20 [ 46.359845][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 46.359856][ T50] Bluetooth: hci0: failed to register connection device [ 46.368193][ T4852] netdevsim netdevsim3 netdevsim2: renamed from eth2 [ 46.375422][ T4852] 8021q: adding VLAN 0 to HW filter on device netdevsim2 [ 46.376565][ T4841] netdevsim netdevsim1 netdevsim2: renamed from eth2 [ 46.378081][ T4841] 8021q: adding VLAN 0 to HW filter on device netdevsim2 [ 46.378394][ T4841] netdevsim netdevsim1 netdevsim3: renamed from eth3 [ 46.379762][ T4841] 8021q: adding VLAN 0 to HW filter on device netdevsim3 [ 46.384671][ T4852] netdevsim netdevsim3 netdevsim3: renamed from eth3 [ 46.385312][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 46.385326][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 46.385339][ T50] Tainted: [W]=WARN [ 46.385342][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 46.385347][ T50] Workqueue: hci0 hci_rx_work [ 46.385361][ T50] Call trace: [ 46.385364][ T50] show_stack+0x2c/0x3c (C) [ 46.385379][ T50] __dump_stack+0x30/0x40 [ 46.385390][ T50] dump_stack_lvl+0xd8/0x12c [ 46.385400][ T50] dump_stack+0x1c/0x28 [ 46.385409][ T50] sysfs_warn_dup+0x9c/0xb8 [ 46.385420][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 46.385429][ T50] kobject_add_internal+0x290/0x6f0 [ 46.385438][ T50] kobject_add_varg+0x9c/0xe8 [ 46.385446][ T50] kobject_add+0x110/0x1c8 [ 46.385452][ T50] device_add+0x394/0x9e0 [ 46.385460][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 46.385470][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 46.385479][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 46.385487][ T50] hci_le_meta_evt+0x2b0/0x46c [ 46.385496][ T50] hci_event_packet+0x4c0/0x9c8 [ 46.385505][ T50] hci_rx_work+0x2f4/0xd78 [ 46.385512][ T50] process_scheduled_works+0x788/0x10b8 [ 46.385522][ T50] worker_thread+0x798/0xbd0 [ 46.385530][ T50] kthread+0x304/0x3d4 [ 46.385538][ T50] ret_from_fork+0x10/0x20 [ 46.385551][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 46.385563][ T50] Bluetooth: hci0: failed to register connection device [ 46.387537][ T4852] 8021q: adding VLAN 0 to HW filter on device netdevsim3 [ 46.404624][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 46.404641][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 46.404656][ T50] Tainted: [W]=WARN [ 46.404659][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 46.404665][ T50] Workqueue: hci0 hci_rx_work [ 46.404679][ T50] Call trace: [ 46.404683][ T50] show_stack+0x2c/0x3c (C) [ 46.404698][ T50] __dump_stack+0x30/0x40 [ 46.404709][ T50] dump_stack_lvl+0xd8/0x12c [ 46.404719][ T50] dump_stack+0x1c/0x28 [ 46.404728][ T50] sysfs_warn_dup+0x9c/0xb8 [ 46.404739][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 46.404748][ T50] kobject_add_internal+0x290/0x6f0 [ 46.404758][ T50] kobject_add_varg+0x9c/0xe8 [ 46.404765][ T50] kobject_add+0x110/0x1c8 [ 46.404772][ T50] device_add+0x394/0x9e0 [ 46.404780][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 46.404790][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 46.404798][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 46.404807][ T50] hci_le_meta_evt+0x2b0/0x46c [ 46.404816][ T50] hci_event_packet+0x4c0/0x9c8 [ 46.404825][ T50] hci_rx_work+0x2f4/0xd78 [ 46.404832][ T50] process_scheduled_works+0x788/0x10b8 [ 46.404841][ T50] worker_thread+0x798/0xbd0 [ 46.404850][ T50] kthread+0x304/0x3d4 [ 46.404858][ T50] ret_from_fork+0x10/0x20 [ 46.404870][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 46.404882][ T50] Bluetooth: hci0: failed to register connection device [ 46.426623][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 46.426639][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 46.426652][ T50] Tainted: [W]=WARN [ 46.426655][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 46.426660][ T50] Workqueue: hci0 hci_rx_work [ 46.426675][ T50] Call trace: [ 46.426678][ T50] show_stack+0x2c/0x3c (C) [ 46.426693][ T50] __dump_stack+0x30/0x40 [ 46.426704][ T50] dump_stack_lvl+0xd8/0x12c [ 46.426714][ T50] dump_stack+0x1c/0x28 [ 46.426724][ T50] sysfs_warn_dup+0x9c/0xb8 [ 46.426734][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 46.426744][ T50] kobject_add_internal+0x290/0x6f0 [ 46.426753][ T50] kobject_add_varg+0x9c/0xe8 [ 46.426760][ T50] kobject_add+0x110/0x1c8 [ 46.426767][ T50] device_add+0x394/0x9e0 [ 46.426775][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 46.426785][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 46.426793][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 46.426802][ T50] hci_le_meta_evt+0x2b0/0x46c [ 46.426811][ T50] hci_event_packet+0x4c0/0x9c8 [ 46.426820][ T50] hci_rx_work+0x2f4/0xd78 [ 46.426827][ T50] process_scheduled_works+0x788/0x10b8 [ 46.426837][ T50] worker_thread+0x798/0xbd0 [ 46.426846][ T50] kthread+0x304/0x3d4 [ 46.426853][ T50] ret_from_fork+0x10/0x20 [ 46.426866][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 46.426878][ T50] Bluetooth: hci0: failed to register connection device [ 46.438932][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 46.438946][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 46.438957][ T50] Tainted: [W]=WARN [ 46.438961][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 46.438965][ T50] Workqueue: hci0 hci_rx_work [ 46.438978][ T50] Call trace: [ 46.438981][ T50] show_stack+0x2c/0x3c (C) [ 46.438995][ T50] __dump_stack+0x30/0x40 [ 46.439006][ T50] dump_stack_lvl+0xd8/0x12c [ 46.439016][ T50] dump_stack+0x1c/0x28 [ 46.439026][ T50] sysfs_warn_dup+0x9c/0xb8 [ 46.439036][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 46.439046][ T50] kobject_add_internal+0x290/0x6f0 [ 46.439055][ T50] kobject_add_varg+0x9c/0xe8 [ 46.439062][ T50] kobject_add+0x110/0x1c8 [ 46.439069][ T50] device_add+0x394/0x9e0 [ 46.439076][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 46.439086][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 46.439095][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 46.439103][ T50] hci_le_meta_evt+0x2b0/0x46c [ 46.439120][ T50] hci_event_packet+0x4c0/0x9c8 [ 46.439129][ T50] hci_rx_work+0x2f4/0xd78 [ 46.439137][ T50] process_scheduled_works+0x788/0x10b8 [ 46.439146][ T50] worker_thread+0x798/0xbd0 [ 46.439155][ T50] kthread+0x304/0x3d4 [ 46.439163][ T50] ret_from_fork+0x10/0x20 [ 46.439176][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 46.439187][ T50] Bluetooth: hci0: failed to register connection device [ 46.454181][ T4850] 8021q: adding VLAN 0 to HW filter on device bond0 [ 46.469955][ T4850] 8021q: adding VLAN 0 to HW filter on device team0 [ 46.491799][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 46.491815][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 46.491827][ T50] Tainted: [W]=WARN [ 46.491830][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 46.491835][ T50] Workqueue: hci0 hci_rx_work [ 46.491850][ T50] Call trace: [ 46.491853][ T50] show_stack+0x2c/0x3c (C) [ 46.491869][ T50] __dump_stack+0x30/0x40 [ 46.491880][ T50] dump_stack_lvl+0xd8/0x12c [ 46.491890][ T50] dump_stack+0x1c/0x28 [ 46.491899][ T50] sysfs_warn_dup+0x9c/0xb8 [ 46.491911][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 46.491921][ T50] kobject_add_internal+0x290/0x6f0 [ 46.491930][ T50] kobject_add_varg+0x9c/0xe8 [ 46.491937][ T50] kobject_add+0x110/0x1c8 [ 46.491944][ T50] device_add+0x394/0x9e0 [ 46.491952][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 46.491962][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 46.491971][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 46.491979][ T50] hci_le_meta_evt+0x2b0/0x46c [ 46.491989][ T50] hci_event_packet+0x4c0/0x9c8 [ 46.491997][ T50] hci_rx_work+0x2f4/0xd78 [ 46.492004][ T50] process_scheduled_works+0x788/0x10b8 [ 46.492014][ T50] worker_thread+0x798/0xbd0 [ 46.492023][ T50] kthread+0x304/0x3d4 [ 46.492030][ T50] ret_from_fork+0x10/0x20 [ 46.492044][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 46.492056][ T50] Bluetooth: hci0: failed to register connection device [ 46.507930][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 46.507945][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 46.507957][ T50] Tainted: [W]=WARN [ 46.507960][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 46.507965][ T50] Workqueue: hci0 hci_rx_work [ 46.507979][ T50] Call trace: [ 46.507982][ T50] show_stack+0x2c/0x3c (C) [ 46.507996][ T50] __dump_stack+0x30/0x40 [ 46.508007][ T50] dump_stack_lvl+0xd8/0x12c [ 46.508017][ T50] dump_stack+0x1c/0x28 [ 46.508026][ T50] sysfs_warn_dup+0x9c/0xb8 [ 46.508037][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 46.508046][ T50] kobject_add_internal+0x290/0x6f0 [ 46.508055][ T50] kobject_add_varg+0x9c/0xe8 [ 46.508063][ T50] kobject_add+0x110/0x1c8 [ 46.508069][ T50] device_add+0x394/0x9e0 [ 46.508077][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 46.508087][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 46.508095][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 46.508104][ T50] hci_le_meta_evt+0x2b0/0x46c [ 46.508124][ T50] hci_event_packet+0x4c0/0x9c8 [ 46.508133][ T50] hci_rx_work+0x2f4/0xd78 [ 46.508140][ T50] process_scheduled_works+0x788/0x10b8 [ 46.508151][ T50] worker_thread+0x798/0xbd0 [ 46.508161][ T50] kthread+0x304/0x3d4 [ 46.508169][ T50] ret_from_fork+0x10/0x20 [ 46.508182][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 46.508193][ T50] Bluetooth: hci0: failed to register connection device [ 46.527308][ T1285] bridge0: port 1(bridge_slave_0) entered blocking state [ 46.527338][ T1285] bridge0: port 1(bridge_slave_0) entered forwarding state [ 46.529521][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 46.529535][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 46.529547][ T50] Tainted: [W]=WARN [ 46.529551][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 46.529557][ T50] Workqueue: hci0 hci_rx_work [ 46.529572][ T50] Call trace: [ 46.529575][ T50] show_stack+0x2c/0x3c (C) [ 46.529590][ T50] __dump_stack+0x30/0x40 [ 46.529602][ T50] dump_stack_lvl+0xd8/0x12c [ 46.529612][ T50] dump_stack+0x1c/0x28 [ 46.529621][ T50] sysfs_warn_dup+0x9c/0xb8 [ 46.529633][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 46.529642][ T50] kobject_add_internal+0x290/0x6f0 [ 46.529651][ T50] kobject_add_varg+0x9c/0xe8 [ 46.529658][ T50] kobject_add+0x110/0x1c8 [ 46.529665][ T50] device_add+0x394/0x9e0 [ 46.529673][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 46.529683][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 46.529692][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 46.529700][ T50] hci_le_meta_evt+0x2b0/0x46c [ 46.529710][ T50] hci_event_packet+0x4c0/0x9c8 [ 46.529718][ T50] hci_rx_work+0x2f4/0xd78 [ 46.529725][ T50] process_scheduled_works+0x788/0x10b8 [ 46.529735][ T50] worker_thread+0x798/0xbd0 [ 46.529743][ T50] kthread+0x304/0x3d4 [ 46.529751][ T50] ret_from_fork+0x10/0x20 [ 46.529764][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 46.529775][ T50] Bluetooth: hci0: failed to register connection device [ 46.547441][ T306] bridge0: port 2(bridge_slave_1) entered blocking state [ 46.547468][ T306] bridge0: port 2(bridge_slave_1) entered forwarding state [ 46.549603][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 46.549617][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 46.549629][ T50] Tainted: [W]=WARN [ 46.549632][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 46.549637][ T50] Workqueue: hci0 hci_rx_work [ 46.549652][ T50] Call trace: [ 46.549655][ T50] show_stack+0x2c/0x3c (C) [ 46.549670][ T50] __dump_stack+0x30/0x40 [ 46.549682][ T50] dump_stack_lvl+0xd8/0x12c [ 46.549692][ T50] dump_stack+0x1c/0x28 [ 46.549702][ T50] sysfs_warn_dup+0x9c/0xb8 [ 46.549713][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 46.549723][ T50] kobject_add_internal+0x290/0x6f0 [ 46.549732][ T50] kobject_add_varg+0x9c/0xe8 [ 46.549740][ T50] kobject_add+0x110/0x1c8 [ 46.549747][ T50] device_add+0x394/0x9e0 [ 46.549755][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 46.549765][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 46.549774][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 46.549782][ T50] hci_le_meta_evt+0x2b0/0x46c [ 46.549791][ T50] hci_event_packet+0x4c0/0x9c8 [ 46.549800][ T50] hci_rx_work+0x2f4/0xd78 [ 46.549807][ T50] process_scheduled_works+0x788/0x10b8 [ 46.549817][ T50] worker_thread+0x798/0xbd0 [ 46.549825][ T50] kthread+0x304/0x3d4 [ 46.549833][ T50] ret_from_fork+0x10/0x20 [ 46.549845][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 46.549857][ T50] Bluetooth: hci0: failed to register connection device [ 46.568342][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 46.568361][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 46.568374][ T50] Tainted: [W]=WARN [ 46.568377][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 46.568383][ T50] Workqueue: hci0 hci_rx_work [ 46.568397][ T50] Call trace: [ 46.568400][ T50] show_stack+0x2c/0x3c (C) [ 46.568415][ T50] __dump_stack+0x30/0x40 [ 46.568426][ T50] dump_stack_lvl+0xd8/0x12c [ 46.568436][ T50] dump_stack+0x1c/0x28 [ 46.568446][ T50] sysfs_warn_dup+0x9c/0xb8 [ 46.568457][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 46.568467][ T50] kobject_add_internal+0x290/0x6f0 [ 46.568477][ T50] kobject_add_varg+0x9c/0xe8 [ 46.568484][ T50] kobject_add+0x110/0x1c8 [ 46.568491][ T50] device_add+0x394/0x9e0 [ 46.568499][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 46.568509][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 46.568518][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 46.568526][ T50] hci_le_meta_evt+0x2b0/0x46c [ 46.568535][ T50] hci_event_packet+0x4c0/0x9c8 [ 46.568544][ T50] hci_rx_work+0x2f4/0xd78 [ 46.568551][ T50] process_scheduled_works+0x788/0x10b8 [ 46.568560][ T50] worker_thread+0x798/0xbd0 [ 46.568569][ T50] kthread+0x304/0x3d4 [ 46.568576][ T50] ret_from_fork+0x10/0x20 [ 46.568589][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 46.568600][ T50] Bluetooth: hci0: failed to register connection device [ 46.576626][ T4850] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 46.576641][ T4850] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 46.625862][ T4857] 8021q: adding VLAN 0 to HW filter on device bond0 [ 46.628744][ T4857] 8021q: adding VLAN 0 to HW filter on device team0 [ 46.631811][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 46.631824][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 46.631836][ T50] Tainted: [W]=WARN [ 46.631840][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 46.631845][ T50] Workqueue: hci0 hci_rx_work [ 46.631860][ T50] Call trace: [ 46.631863][ T50] show_stack+0x2c/0x3c (C) [ 46.631879][ T50] __dump_stack+0x30/0x40 [ 46.631893][ T50] dump_stack_lvl+0xd8/0x12c [ 46.631902][ T50] dump_stack+0x1c/0x28 [ 46.631912][ T50] sysfs_warn_dup+0x9c/0xb8 [ 46.631923][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 46.631933][ T50] kobject_add_internal+0x290/0x6f0 [ 46.631942][ T50] kobject_add_varg+0x9c/0xe8 [ 46.631949][ T50] kobject_add+0x110/0x1c8 [ 46.631956][ T50] device_add+0x394/0x9e0 [ 46.631964][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 46.631975][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 46.631984][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 46.631993][ T50] hci_le_meta_evt+0x2b0/0x46c [ 46.632003][ T50] hci_event_packet+0x4c0/0x9c8 [ 46.632012][ T50] hci_rx_work+0x2f4/0xd78 [ 46.632019][ T50] process_scheduled_works+0x788/0x10b8 [ 46.632029][ T50] worker_thread+0x798/0xbd0 [ 46.632037][ T50] kthread+0x304/0x3d4 [ 46.632045][ T50] ret_from_fork+0x10/0x20 [ 46.632058][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 46.632070][ T50] Bluetooth: hci0: failed to register connection device [ 46.643778][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 46.643791][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 46.643803][ T50] Tainted: [W]=WARN [ 46.643806][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 46.643811][ T50] Workqueue: hci0 hci_rx_work [ 46.643824][ T50] Call trace: [ 46.643827][ T50] show_stack+0x2c/0x3c (C) [ 46.643840][ T50] __dump_stack+0x30/0x40 [ 46.643851][ T50] dump_stack_lvl+0xd8/0x12c [ 46.643860][ T50] dump_stack+0x1c/0x28 [ 46.643870][ T50] sysfs_warn_dup+0x9c/0xb8 [ 46.643880][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 46.643890][ T50] kobject_add_internal+0x290/0x6f0 [ 46.643899][ T50] kobject_add_varg+0x9c/0xe8 [ 46.643906][ T50] kobject_add+0x110/0x1c8 [ 46.643913][ T50] device_add+0x394/0x9e0 [ 46.643920][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 46.643929][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 46.643938][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 46.643947][ T50] hci_le_meta_evt+0x2b0/0x46c [ 46.643956][ T50] hci_event_packet+0x4c0/0x9c8 [ 46.643965][ T50] hci_rx_work+0x2f4/0xd78 [ 46.643972][ T50] process_scheduled_works+0x788/0x10b8 [ 46.643981][ T50] worker_thread+0x798/0xbd0 [ 46.643990][ T50] kthread+0x304/0x3d4 [ 46.643997][ T50] ret_from_fork+0x10/0x20 [ 46.644010][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 46.644021][ T50] Bluetooth: hci0: failed to register connection device [ 46.650525][ T50] Bluetooth: hci0: command 0x041b tx timeout [ 46.650913][ T4862] Bluetooth: hci2: command tx timeout [ 46.650929][ T4862] Bluetooth: hci4: command tx timeout [ 46.650941][ T4768] Bluetooth: hci3: command tx timeout [ 46.664046][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 46.664061][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 46.664073][ T50] Tainted: [W]=WARN [ 46.664077][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 46.664082][ T50] Workqueue: hci0 hci_rx_work [ 46.664096][ T50] Call trace: [ 46.664099][ T50] show_stack+0x2c/0x3c (C) [ 46.664123][ T50] __dump_stack+0x30/0x40 [ 46.664135][ T50] dump_stack_lvl+0xd8/0x12c [ 46.664146][ T50] dump_stack+0x1c/0x28 [ 46.664158][ T50] sysfs_warn_dup+0x9c/0xb8 [ 46.664170][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 46.664180][ T50] kobject_add_internal+0x290/0x6f0 [ 46.664189][ T50] kobject_add_varg+0x9c/0xe8 [ 46.664196][ T50] kobject_add+0x110/0x1c8 [ 46.664204][ T50] device_add+0x394/0x9e0 [ 46.664211][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 46.664221][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 46.664230][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 46.664238][ T50] hci_le_meta_evt+0x2b0/0x46c [ 46.664248][ T50] hci_event_packet+0x4c0/0x9c8 [ 46.664256][ T50] hci_rx_work+0x2f4/0xd78 [ 46.664263][ T50] process_scheduled_works+0x788/0x10b8 [ 46.664273][ T50] worker_thread+0x798/0xbd0 [ 46.664281][ T50] kthread+0x304/0x3d4 [ 46.664289][ T50] ret_from_fork+0x10/0x20 [ 46.664302][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 46.664314][ T50] Bluetooth: hci0: failed to register connection device [ 46.668920][ T306] bridge0: port 1(bridge_slave_0) entered blocking state [ 46.668945][ T306] bridge0: port 1(bridge_slave_0) entered forwarding state [ 46.678522][ T4841] 8021q: adding VLAN 0 to HW filter on device bond0 [ 46.688139][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 46.688157][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 46.688176][ T50] Tainted: [W]=WARN [ 46.688182][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 46.688188][ T50] Workqueue: hci0 hci_rx_work [ 46.688203][ T50] Call trace: [ 46.688206][ T50] show_stack+0x2c/0x3c (C) [ 46.688221][ T50] __dump_stack+0x30/0x40 [ 46.688234][ T50] dump_stack_lvl+0xd8/0x12c [ 46.688244][ T50] dump_stack+0x1c/0x28 [ 46.688253][ T50] sysfs_warn_dup+0x9c/0xb8 [ 46.688264][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 46.688274][ T50] kobject_add_internal+0x290/0x6f0 [ 46.688283][ T50] kobject_add_varg+0x9c/0xe8 [ 46.688290][ T50] kobject_add+0x110/0x1c8 [ 46.688297][ T50] device_add+0x394/0x9e0 [ 46.688306][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 46.688315][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 46.688324][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 46.688332][ T50] hci_le_meta_evt+0x2b0/0x46c [ 46.688342][ T50] hci_event_packet+0x4c0/0x9c8 [ 46.688350][ T50] hci_rx_work+0x2f4/0xd78 [ 46.688357][ T50] process_scheduled_works+0x788/0x10b8 [ 46.688367][ T50] worker_thread+0x798/0xbd0 [ 46.688376][ T50] kthread+0x304/0x3d4 [ 46.688383][ T50] ret_from_fork+0x10/0x20 [ 46.688397][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 46.688409][ T50] Bluetooth: hci0: failed to register connection device [ 46.706275][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 46.706290][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 46.706302][ T50] Tainted: [W]=WARN [ 46.706305][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 46.706310][ T50] Workqueue: hci0 hci_rx_work [ 46.706324][ T50] Call trace: [ 46.706327][ T50] show_stack+0x2c/0x3c (C) [ 46.706341][ T50] __dump_stack+0x30/0x40 [ 46.706352][ T50] dump_stack_lvl+0xd8/0x12c [ 46.706362][ T50] dump_stack+0x1c/0x28 [ 46.706371][ T50] sysfs_warn_dup+0x9c/0xb8 [ 46.706382][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 46.706391][ T50] kobject_add_internal+0x290/0x6f0 [ 46.706400][ T50] kobject_add_varg+0x9c/0xe8 [ 46.706407][ T50] kobject_add+0x110/0x1c8 [ 46.706414][ T50] device_add+0x394/0x9e0 [ 46.706422][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 46.706432][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 46.706441][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 46.706449][ T50] hci_le_meta_evt+0x2b0/0x46c [ 46.706459][ T50] hci_event_packet+0x4c0/0x9c8 [ 46.706467][ T50] hci_rx_work+0x2f4/0xd78 [ 46.706474][ T50] process_scheduled_works+0x788/0x10b8 [ 46.706484][ T50] worker_thread+0x798/0xbd0 [ 46.706493][ T50] kthread+0x304/0x3d4 [ 46.706501][ T50] ret_from_fork+0x10/0x20 [ 46.706514][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 46.706525][ T50] Bluetooth: hci0: failed to register connection device [ 46.706930][ T4841] 8021q: adding VLAN 0 to HW filter on device team0 [ 46.708829][ T306] bridge0: port 2(bridge_slave_1) entered blocking state [ 46.708854][ T306] bridge0: port 2(bridge_slave_1) entered forwarding state [ 46.724837][ T4857] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 46.724853][ T4857] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 46.731674][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 46.731688][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 46.731700][ T50] Tainted: [W]=WARN [ 46.731704][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 46.731709][ T50] Workqueue: hci0 hci_rx_work [ 46.731723][ T50] Call trace: [ 46.731726][ T50] show_stack+0x2c/0x3c (C) [ 46.731741][ T50] __dump_stack+0x30/0x40 [ 46.731752][ T50] dump_stack_lvl+0xd8/0x12c [ 46.731762][ T50] dump_stack+0x1c/0x28 [ 46.731772][ T50] sysfs_warn_dup+0x9c/0xb8 [ 46.731784][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 46.731794][ T50] kobject_add_internal+0x290/0x6f0 [ 46.731803][ T50] kobject_add_varg+0x9c/0xe8 [ 46.731811][ T50] kobject_add+0x110/0x1c8 [ 46.731818][ T50] device_add+0x394/0x9e0 [ 46.731825][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 46.731835][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 46.731844][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 46.731852][ T50] hci_le_meta_evt+0x2b0/0x46c [ 46.731862][ T50] hci_event_packet+0x4c0/0x9c8 [ 46.731871][ T50] hci_rx_work+0x2f4/0xd78 [ 46.731878][ T50] process_scheduled_works+0x788/0x10b8 [ 46.731887][ T50] worker_thread+0x798/0xbd0 [ 46.731895][ T50] kthread+0x304/0x3d4 [ 46.731903][ T50] ret_from_fork+0x10/0x20 [ 46.731916][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 46.731928][ T50] Bluetooth: hci0: failed to register connection device [ 46.756949][ T1285] bridge0: port 1(bridge_slave_0) entered blocking state [ 46.756976][ T1285] bridge0: port 1(bridge_slave_0) entered forwarding state [ 46.761046][ T4852] 8021q: adding VLAN 0 to HW filter on device bond0 [ 46.764005][ T4852] 8021q: adding VLAN 0 to HW filter on device team0 [ 46.771355][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 46.771370][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 46.771382][ T50] Tainted: [W]=WARN [ 46.771386][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 46.771391][ T50] Workqueue: hci0 hci_rx_work [ 46.771406][ T50] Call trace: [ 46.771409][ T50] show_stack+0x2c/0x3c (C) [ 46.771424][ T50] __dump_stack+0x30/0x40 [ 46.771436][ T50] dump_stack_lvl+0xd8/0x12c [ 46.771445][ T50] dump_stack+0x1c/0x28 [ 46.771455][ T50] sysfs_warn_dup+0x9c/0xb8 [ 46.771466][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 46.771476][ T50] kobject_add_internal+0x290/0x6f0 [ 46.771485][ T50] kobject_add_varg+0x9c/0xe8 [ 46.771492][ T50] kobject_add+0x110/0x1c8 [ 46.771499][ T50] device_add+0x394/0x9e0 [ 46.771507][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 46.771518][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 46.771527][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 46.771535][ T50] hci_le_meta_evt+0x2b0/0x46c [ 46.771546][ T50] hci_event_packet+0x4c0/0x9c8 [ 46.771555][ T50] hci_rx_work+0x2f4/0xd78 [ 46.771561][ T50] process_scheduled_works+0x788/0x10b8 [ 46.771572][ T50] worker_thread+0x798/0xbd0 [ 46.771580][ T50] kthread+0x304/0x3d4 [ 46.771588][ T50] ret_from_fork+0x10/0x20 [ 46.771601][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 46.771613][ T50] Bluetooth: hci0: failed to register connection device [ 46.772662][ T1914] bridge0: port 1(bridge_slave_0) entered blocking state [ 46.772684][ T1914] bridge0: port 1(bridge_slave_0) entered forwarding state [ 46.773183][ T1914] bridge0: port 2(bridge_slave_1) entered blocking state [ 46.773205][ T1914] bridge0: port 2(bridge_slave_1) entered forwarding state [ 46.811519][ T1285] bridge0: port 2(bridge_slave_1) entered blocking state [ 46.811547][ T1285] bridge0: port 2(bridge_slave_1) entered forwarding state [ 46.816728][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 46.816743][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 46.816757][ T50] Tainted: [W]=WARN [ 46.816761][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 46.816766][ T50] Workqueue: hci0 hci_rx_work [ 46.816781][ T50] Call trace: [ 46.816784][ T50] show_stack+0x2c/0x3c (C) [ 46.816800][ T50] __dump_stack+0x30/0x40 [ 46.816811][ T50] dump_stack_lvl+0xd8/0x12c [ 46.816822][ T50] dump_stack+0x1c/0x28 [ 46.816831][ T50] sysfs_warn_dup+0x9c/0xb8 [ 46.816843][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 46.816853][ T50] kobject_add_internal+0x290/0x6f0 [ 46.816862][ T50] kobject_add_varg+0x9c/0xe8 [ 46.816869][ T50] kobject_add+0x110/0x1c8 [ 46.816876][ T50] device_add+0x394/0x9e0 [ 46.816884][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 46.816894][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 46.816904][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 46.816912][ T50] hci_le_meta_evt+0x2b0/0x46c [ 46.816923][ T50] hci_event_packet+0x4c0/0x9c8 [ 46.816932][ T50] hci_rx_work+0x2f4/0xd78 [ 46.816939][ T50] process_scheduled_works+0x788/0x10b8 [ 46.816948][ T50] worker_thread+0x798/0xbd0 [ 46.816957][ T50] kthread+0x304/0x3d4 [ 46.816965][ T50] ret_from_fork+0x10/0x20 [ 46.816977][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 46.816989][ T50] Bluetooth: hci0: failed to register connection device [ 46.848191][ T4841] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 46.848207][ T4841] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 46.848706][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 46.848720][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 46.848733][ T50] Tainted: [W]=WARN [ 46.848736][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 46.848741][ T50] Workqueue: hci0 hci_rx_work [ 46.848755][ T50] Call trace: [ 46.848758][ T50] show_stack+0x2c/0x3c (C) [ 46.848773][ T50] __dump_stack+0x30/0x40 [ 46.848784][ T50] dump_stack_lvl+0xd8/0x12c [ 46.848794][ T50] dump_stack+0x1c/0x28 [ 46.848803][ T50] sysfs_warn_dup+0x9c/0xb8 [ 46.848815][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 46.848825][ T50] kobject_add_internal+0x290/0x6f0 [ 46.848835][ T50] kobject_add_varg+0x9c/0xe8 [ 46.848843][ T50] kobject_add+0x110/0x1c8 [ 46.848850][ T50] device_add+0x394/0x9e0 [ 46.848859][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 46.848871][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 46.848881][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 46.848889][ T50] hci_le_meta_evt+0x2b0/0x46c [ 46.848900][ T50] hci_event_packet+0x4c0/0x9c8 [ 46.848909][ T50] hci_rx_work+0x2f4/0xd78 [ 46.848916][ T50] process_scheduled_works+0x788/0x10b8 [ 46.848927][ T50] worker_thread+0x798/0xbd0 [ 46.848936][ T50] kthread+0x304/0x3d4 [ 46.848944][ T50] ret_from_fork+0x10/0x20 [ 46.848957][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 46.848968][ T50] Bluetooth: hci0: failed to register connection device [ 46.882481][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 46.882497][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 46.882509][ T50] Tainted: [W]=WARN [ 46.882513][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 46.882518][ T50] Workqueue: hci0 hci_rx_work [ 46.882533][ T50] Call trace: [ 46.882536][ T50] show_stack+0x2c/0x3c (C) [ 46.882551][ T50] __dump_stack+0x30/0x40 [ 46.882561][ T50] dump_stack_lvl+0xd8/0x12c [ 46.882571][ T50] dump_stack+0x1c/0x28 [ 46.882581][ T50] sysfs_warn_dup+0x9c/0xb8 [ 46.882592][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 46.882601][ T50] kobject_add_internal+0x290/0x6f0 [ 46.882611][ T50] kobject_add_varg+0x9c/0xe8 [ 46.882618][ T50] kobject_add+0x110/0x1c8 [ 46.882625][ T50] device_add+0x394/0x9e0 [ 46.882633][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 46.882643][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 46.882651][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 46.882660][ T50] hci_le_meta_evt+0x2b0/0x46c [ 46.882669][ T50] hci_event_packet+0x4c0/0x9c8 [ 46.882678][ T50] hci_rx_work+0x2f4/0xd78 [ 46.882685][ T50] process_scheduled_works+0x788/0x10b8 [ 46.882695][ T50] worker_thread+0x798/0xbd0 [ 46.882703][ T50] kthread+0x304/0x3d4 [ 46.882711][ T50] ret_from_fork+0x10/0x20 [ 46.882725][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 46.882737][ T50] Bluetooth: hci0: failed to register connection device [ 46.913782][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 46.913797][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 46.913809][ T50] Tainted: [W]=WARN [ 46.913813][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 46.913818][ T50] Workqueue: hci0 hci_rx_work [ 46.913831][ T50] Call trace: [ 46.913834][ T50] show_stack+0x2c/0x3c (C) [ 46.913849][ T50] __dump_stack+0x30/0x40 [ 46.913860][ T50] dump_stack_lvl+0xd8/0x12c [ 46.913870][ T50] dump_stack+0x1c/0x28 [ 46.913880][ T50] sysfs_warn_dup+0x9c/0xb8 [ 46.913891][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 46.913901][ T50] kobject_add_internal+0x290/0x6f0 [ 46.913910][ T50] kobject_add_varg+0x9c/0xe8 [ 46.913918][ T50] kobject_add+0x110/0x1c8 [ 46.913925][ T50] device_add+0x394/0x9e0 [ 46.913932][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 46.913942][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 46.913951][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 46.913959][ T50] hci_le_meta_evt+0x2b0/0x46c [ 46.913969][ T50] hci_event_packet+0x4c0/0x9c8 [ 46.913978][ T50] hci_rx_work+0x2f4/0xd78 [ 46.913985][ T50] process_scheduled_works+0x788/0x10b8 [ 46.913994][ T50] worker_thread+0x798/0xbd0 [ 46.914003][ T50] kthread+0x304/0x3d4 [ 46.914010][ T50] ret_from_fork+0x10/0x20 [ 46.914023][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 46.914034][ T50] Bluetooth: hci0: failed to register connection device [ 46.953630][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 46.953646][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 46.953658][ T50] Tainted: [W]=WARN [ 46.953661][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 46.953666][ T50] Workqueue: hci0 hci_rx_work [ 46.953680][ T50] Call trace: [ 46.953683][ T50] show_stack+0x2c/0x3c (C) [ 46.953698][ T50] __dump_stack+0x30/0x40 [ 46.953709][ T50] dump_stack_lvl+0xd8/0x12c [ 46.953719][ T50] dump_stack+0x1c/0x28 [ 46.953728][ T50] sysfs_warn_dup+0x9c/0xb8 [ 46.953739][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 46.953749][ T50] kobject_add_internal+0x290/0x6f0 [ 46.953759][ T50] kobject_add_varg+0x9c/0xe8 [ 46.953766][ T50] kobject_add+0x110/0x1c8 [ 46.953773][ T50] device_add+0x394/0x9e0 [ 46.953781][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 46.953791][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 46.953800][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 46.953808][ T50] hci_le_meta_evt+0x2b0/0x46c [ 46.953817][ T50] hci_event_packet+0x4c0/0x9c8 [ 46.953826][ T50] hci_rx_work+0x2f4/0xd78 [ 46.953833][ T50] process_scheduled_works+0x788/0x10b8 [ 46.953842][ T50] worker_thread+0x798/0xbd0 [ 46.953851][ T50] kthread+0x304/0x3d4 [ 46.953858][ T50] ret_from_fork+0x10/0x20 [ 46.953871][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 46.953882][ T50] Bluetooth: hci0: failed to register connection device [ 46.986267][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 46.986285][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 46.986299][ T50] Tainted: [W]=WARN [ 46.986302][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 46.986308][ T50] Workqueue: hci0 hci_rx_work [ 46.986323][ T50] Call trace: [ 46.986326][ T50] show_stack+0x2c/0x3c (C) [ 46.986342][ T50] __dump_stack+0x30/0x40 [ 46.986354][ T50] dump_stack_lvl+0xd8/0x12c [ 46.986364][ T50] dump_stack+0x1c/0x28 [ 46.986373][ T50] sysfs_warn_dup+0x9c/0xb8 [ 46.986385][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 46.986395][ T50] kobject_add_internal+0x290/0x6f0 [ 46.986404][ T50] kobject_add_varg+0x9c/0xe8 [ 46.986412][ T50] kobject_add+0x110/0x1c8 [ 46.986419][ T50] device_add+0x394/0x9e0 [ 46.986427][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 46.986437][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 46.986445][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 46.986454][ T50] hci_le_meta_evt+0x2b0/0x46c [ 46.986463][ T50] hci_event_packet+0x4c0/0x9c8 [ 46.986472][ T50] hci_rx_work+0x2f4/0xd78 [ 46.986478][ T50] process_scheduled_works+0x788/0x10b8 [ 46.986488][ T50] worker_thread+0x798/0xbd0 [ 46.986497][ T50] kthread+0x304/0x3d4 [ 46.986504][ T50] ret_from_fork+0x10/0x20 [ 46.986517][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 46.986529][ T50] Bluetooth: hci0: failed to register connection device [ 47.018519][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 47.018535][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 47.018547][ T50] Tainted: [W]=WARN [ 47.018551][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 47.018556][ T50] Workqueue: hci0 hci_rx_work [ 47.018571][ T50] Call trace: [ 47.018574][ T50] show_stack+0x2c/0x3c (C) [ 47.018590][ T50] __dump_stack+0x30/0x40 [ 47.018602][ T50] dump_stack_lvl+0xd8/0x12c [ 47.018611][ T50] dump_stack+0x1c/0x28 [ 47.018621][ T50] sysfs_warn_dup+0x9c/0xb8 [ 47.018632][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 47.018642][ T50] kobject_add_internal+0x290/0x6f0 [ 47.018651][ T50] kobject_add_varg+0x9c/0xe8 [ 47.018658][ T50] kobject_add+0x110/0x1c8 [ 47.018665][ T50] device_add+0x394/0x9e0 [ 47.018673][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 47.018683][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 47.018692][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 47.018700][ T50] hci_le_meta_evt+0x2b0/0x46c [ 47.018710][ T50] hci_event_packet+0x4c0/0x9c8 [ 47.018719][ T50] hci_rx_work+0x2f4/0xd78 [ 47.018726][ T50] process_scheduled_works+0x788/0x10b8 [ 47.018736][ T50] worker_thread+0x798/0xbd0 [ 47.018744][ T50] kthread+0x304/0x3d4 [ 47.018751][ T50] ret_from_fork+0x10/0x20 [ 47.018764][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 47.018776][ T50] Bluetooth: hci0: failed to register connection device [ 47.042544][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 47.042560][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 47.042572][ T50] Tainted: [W]=WARN [ 47.042575][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 47.042580][ T50] Workqueue: hci0 hci_rx_work [ 47.042594][ T50] Call trace: [ 47.042597][ T50] show_stack+0x2c/0x3c (C) [ 47.042612][ T50] __dump_stack+0x30/0x40 [ 47.042624][ T50] dump_stack_lvl+0xd8/0x12c [ 47.042634][ T50] dump_stack+0x1c/0x28 [ 47.042643][ T50] sysfs_warn_dup+0x9c/0xb8 [ 47.042654][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 47.042663][ T50] kobject_add_internal+0x290/0x6f0 [ 47.042672][ T50] kobject_add_varg+0x9c/0xe8 [ 47.042679][ T50] kobject_add+0x110/0x1c8 [ 47.042686][ T50] device_add+0x394/0x9e0 [ 47.042695][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 47.042704][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 47.042713][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 47.042721][ T50] hci_le_meta_evt+0x2b0/0x46c [ 47.042730][ T50] hci_event_packet+0x4c0/0x9c8 [ 47.042739][ T50] hci_rx_work+0x2f4/0xd78 [ 47.042746][ T50] process_scheduled_works+0x788/0x10b8 [ 47.042755][ T50] worker_thread+0x798/0xbd0 [ 47.042764][ T50] kthread+0x304/0x3d4 [ 47.042771][ T50] ret_from_fork+0x10/0x20 [ 47.042784][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 47.042796][ T50] Bluetooth: hci0: failed to register connection device [ 47.075828][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 47.075845][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 47.075858][ T50] Tainted: [W]=WARN [ 47.075861][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 47.075866][ T50] Workqueue: hci0 hci_rx_work [ 47.075880][ T50] Call trace: [ 47.075884][ T50] show_stack+0x2c/0x3c (C) [ 47.075900][ T50] __dump_stack+0x30/0x40 [ 47.075911][ T50] dump_stack_lvl+0xd8/0x12c [ 47.075921][ T50] dump_stack+0x1c/0x28 [ 47.075930][ T50] sysfs_warn_dup+0x9c/0xb8 [ 47.075941][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 47.075950][ T50] kobject_add_internal+0x290/0x6f0 [ 47.075960][ T50] kobject_add_varg+0x9c/0xe8 [ 47.075967][ T50] kobject_add+0x110/0x1c8 [ 47.075974][ T50] device_add+0x394/0x9e0 [ 47.075982][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 47.075991][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 47.076000][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 47.076008][ T50] hci_le_meta_evt+0x2b0/0x46c [ 47.076017][ T50] hci_event_packet+0x4c0/0x9c8 [ 47.076026][ T50] hci_rx_work+0x2f4/0xd78 [ 47.076033][ T50] process_scheduled_works+0x788/0x10b8 [ 47.076043][ T50] worker_thread+0x798/0xbd0 [ 47.076051][ T50] kthread+0x304/0x3d4 [ 47.076059][ T50] ret_from_fork+0x10/0x20 [ 47.076072][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 47.076084][ T50] Bluetooth: hci0: failed to register connection device [ 47.117584][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 47.117599][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 47.117611][ T50] Tainted: [W]=WARN [ 47.117614][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 47.117619][ T50] Workqueue: hci0 hci_rx_work [ 47.117633][ T50] Call trace: [ 47.117636][ T50] show_stack+0x2c/0x3c (C) [ 47.117652][ T50] __dump_stack+0x30/0x40 [ 47.117664][ T50] dump_stack_lvl+0xd8/0x12c [ 47.117674][ T50] dump_stack+0x1c/0x28 [ 47.117683][ T50] sysfs_warn_dup+0x9c/0xb8 [ 47.117695][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 47.117705][ T50] kobject_add_internal+0x290/0x6f0 [ 47.117715][ T50] kobject_add_varg+0x9c/0xe8 [ 47.117722][ T50] kobject_add+0x110/0x1c8 [ 47.117729][ T50] device_add+0x394/0x9e0 [ 47.117736][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 47.117746][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 47.117755][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 47.117763][ T50] hci_le_meta_evt+0x2b0/0x46c [ 47.117773][ T50] hci_event_packet+0x4c0/0x9c8 [ 47.117781][ T50] hci_rx_work+0x2f4/0xd78 [ 47.117788][ T50] process_scheduled_works+0x788/0x10b8 [ 47.117798][ T50] worker_thread+0x798/0xbd0 [ 47.117807][ T50] kthread+0x304/0x3d4 [ 47.117814][ T50] ret_from_fork+0x10/0x20 [ 47.117826][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 47.117839][ T50] Bluetooth: hci0: failed to register connection device [ 47.152175][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 47.152191][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 47.152203][ T50] Tainted: [W]=WARN [ 47.152206][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 47.152212][ T50] Workqueue: hci0 hci_rx_work [ 47.152226][ T50] Call trace: [ 47.152229][ T50] show_stack+0x2c/0x3c (C) [ 47.152245][ T50] __dump_stack+0x30/0x40 [ 47.152255][ T50] dump_stack_lvl+0xd8/0x12c [ 47.152265][ T50] dump_stack+0x1c/0x28 [ 47.152275][ T50] sysfs_warn_dup+0x9c/0xb8 [ 47.152285][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 47.152295][ T50] kobject_add_internal+0x290/0x6f0 [ 47.152305][ T50] kobject_add_varg+0x9c/0xe8 [ 47.152312][ T50] kobject_add+0x110/0x1c8 [ 47.152319][ T50] device_add+0x394/0x9e0 [ 47.152327][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 47.152337][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 47.152345][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 47.152354][ T50] hci_le_meta_evt+0x2b0/0x46c [ 47.152363][ T50] hci_event_packet+0x4c0/0x9c8 [ 47.152371][ T50] hci_rx_work+0x2f4/0xd78 [ 47.152378][ T50] process_scheduled_works+0x788/0x10b8 [ 47.152388][ T50] worker_thread+0x798/0xbd0 [ 47.152397][ T50] kthread+0x304/0x3d4 [ 47.152404][ T50] ret_from_fork+0x10/0x20 [ 47.152417][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 47.152429][ T50] Bluetooth: hci0: failed to register connection device [ 47.170001][ T4850] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 47.174432][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 47.174446][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 47.174458][ T50] Tainted: [W]=WARN [ 47.174462][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 47.174467][ T50] Workqueue: hci0 hci_rx_work [ 47.174481][ T50] Call trace: [ 47.174484][ T50] show_stack+0x2c/0x3c (C) [ 47.174499][ T50] __dump_stack+0x30/0x40 [ 47.174510][ T50] dump_stack_lvl+0xd8/0x12c [ 47.174520][ T50] dump_stack+0x1c/0x28 [ 47.174529][ T50] sysfs_warn_dup+0x9c/0xb8 [ 47.174540][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 47.174550][ T50] kobject_add_internal+0x290/0x6f0 [ 47.174559][ T50] kobject_add_varg+0x9c/0xe8 [ 47.174566][ T50] kobject_add+0x110/0x1c8 [ 47.174573][ T50] device_add+0x394/0x9e0 [ 47.174581][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 47.174591][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 47.174600][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 47.174608][ T50] hci_le_meta_evt+0x2b0/0x46c [ 47.174617][ T50] hci_event_packet+0x4c0/0x9c8 [ 47.174626][ T50] hci_rx_work+0x2f4/0xd78 [ 47.174633][ T50] process_scheduled_works+0x788/0x10b8 [ 47.174642][ T50] worker_thread+0x798/0xbd0 [ 47.174651][ T50] kthread+0x304/0x3d4 [ 47.174659][ T50] ret_from_fork+0x10/0x20 [ 47.174672][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 47.174684][ T50] Bluetooth: hci0: failed to register connection device [ 47.211135][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 47.211153][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 47.211167][ T50] Tainted: [W]=WARN [ 47.211171][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 47.211177][ T50] Workqueue: hci0 hci_rx_work [ 47.211191][ T50] Call trace: [ 47.211195][ T50] show_stack+0x2c/0x3c (C) [ 47.211209][ T50] __dump_stack+0x30/0x40 [ 47.211221][ T50] dump_stack_lvl+0xd8/0x12c [ 47.211231][ T50] dump_stack+0x1c/0x28 [ 47.211240][ T50] sysfs_warn_dup+0x9c/0xb8 [ 47.211251][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 47.211261][ T50] kobject_add_internal+0x290/0x6f0 [ 47.211270][ T50] kobject_add_varg+0x9c/0xe8 [ 47.211277][ T50] kobject_add+0x110/0x1c8 [ 47.211284][ T50] device_add+0x394/0x9e0 [ 47.211292][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 47.211302][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 47.211311][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 47.211319][ T50] hci_le_meta_evt+0x2b0/0x46c [ 47.211329][ T50] hci_event_packet+0x4c0/0x9c8 [ 47.211337][ T50] hci_rx_work+0x2f4/0xd78 [ 47.211344][ T50] process_scheduled_works+0x788/0x10b8 [ 47.211353][ T50] worker_thread+0x798/0xbd0 [ 47.211362][ T50] kthread+0x304/0x3d4 [ 47.211370][ T50] ret_from_fork+0x10/0x20 [ 47.211382][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 47.211394][ T50] Bluetooth: hci0: failed to register connection device [ 47.225036][ T4850] veth0_vlan: entered promiscuous mode [ 47.227054][ T4850] veth1_vlan: entered promiscuous mode [ 47.264582][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 47.264598][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 47.264610][ T50] Tainted: [W]=WARN [ 47.264613][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 47.264618][ T50] Workqueue: hci0 hci_rx_work [ 47.264631][ T50] Call trace: [ 47.264634][ T50] show_stack+0x2c/0x3c (C) [ 47.264649][ T50] __dump_stack+0x30/0x40 [ 47.264660][ T50] dump_stack_lvl+0xd8/0x12c [ 47.264670][ T50] dump_stack+0x1c/0x28 [ 47.264679][ T50] sysfs_warn_dup+0x9c/0xb8 [ 47.264690][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 47.264699][ T50] kobject_add_internal+0x290/0x6f0 [ 47.264708][ T50] kobject_add_varg+0x9c/0xe8 [ 47.264715][ T50] kobject_add+0x110/0x1c8 [ 47.264722][ T50] device_add+0x394/0x9e0 [ 47.264731][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 47.264740][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 47.264749][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 47.264758][ T50] hci_le_meta_evt+0x2b0/0x46c [ 47.264767][ T50] hci_event_packet+0x4c0/0x9c8 [ 47.264776][ T50] hci_rx_work+0x2f4/0xd78 [ 47.264782][ T50] process_scheduled_works+0x788/0x10b8 [ 47.264792][ T50] worker_thread+0x798/0xbd0 [ 47.264801][ T50] kthread+0x304/0x3d4 [ 47.264808][ T50] ret_from_fork+0x10/0x20 [ 47.264821][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 47.264833][ T50] Bluetooth: hci0: failed to register connection device [ 47.267552][ T4857] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 47.278095][ T4850] veth0_macvtap: entered promiscuous mode [ 47.290419][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 47.290435][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 47.290447][ T50] Tainted: [W]=WARN [ 47.290451][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 47.290456][ T50] Workqueue: hci0 hci_rx_work [ 47.290469][ T50] Call trace: [ 47.290472][ T50] show_stack+0x2c/0x3c (C) [ 47.290488][ T50] __dump_stack+0x30/0x40 [ 47.290500][ T50] dump_stack_lvl+0xd8/0x12c [ 47.290510][ T50] dump_stack+0x1c/0x28 [ 47.290520][ T50] sysfs_warn_dup+0x9c/0xb8 [ 47.290530][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 47.290540][ T50] kobject_add_internal+0x290/0x6f0 [ 47.290549][ T50] kobject_add_varg+0x9c/0xe8 [ 47.290556][ T50] kobject_add+0x110/0x1c8 [ 47.290563][ T50] device_add+0x394/0x9e0 [ 47.290571][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 47.290581][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 47.290589][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 47.290598][ T50] hci_le_meta_evt+0x2b0/0x46c [ 47.290607][ T50] hci_event_packet+0x4c0/0x9c8 [ 47.290616][ T50] hci_rx_work+0x2f4/0xd78 [ 47.290623][ T50] process_scheduled_works+0x788/0x10b8 [ 47.290632][ T50] worker_thread+0x798/0xbd0 [ 47.290641][ T50] kthread+0x304/0x3d4 [ 47.290649][ T50] ret_from_fork+0x10/0x20 [ 47.290661][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 47.290673][ T50] Bluetooth: hci0: failed to register connection device [ 47.299370][ T4852] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 47.310130][ T4850] veth1_macvtap: entered promiscuous mode [ 47.327366][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 47.327381][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 47.327393][ T50] Tainted: [W]=WARN [ 47.327396][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 47.327400][ T50] Workqueue: hci0 hci_rx_work [ 47.327414][ T50] Call trace: [ 47.327417][ T50] show_stack+0x2c/0x3c (C) [ 47.327431][ T50] __dump_stack+0x30/0x40 [ 47.327442][ T50] dump_stack_lvl+0xd8/0x12c [ 47.327451][ T50] dump_stack+0x1c/0x28 [ 47.327461][ T50] sysfs_warn_dup+0x9c/0xb8 [ 47.327472][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 47.327481][ T50] kobject_add_internal+0x290/0x6f0 [ 47.327491][ T50] kobject_add_varg+0x9c/0xe8 [ 47.327498][ T50] kobject_add+0x110/0x1c8 [ 47.327505][ T50] device_add+0x394/0x9e0 [ 47.327513][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 47.327522][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 47.327531][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 47.327539][ T50] hci_le_meta_evt+0x2b0/0x46c [ 47.327548][ T50] hci_event_packet+0x4c0/0x9c8 [ 47.327557][ T50] hci_rx_work+0x2f4/0xd78 [ 47.327564][ T50] process_scheduled_works+0x788/0x10b8 [ 47.327573][ T50] worker_thread+0x798/0xbd0 [ 47.327582][ T50] kthread+0x304/0x3d4 [ 47.327590][ T50] ret_from_fork+0x10/0x20 [ 47.327602][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 47.327614][ T50] Bluetooth: hci0: failed to register connection device [ 47.336877][ T4850] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 47.347213][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 47.347229][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 47.347241][ T50] Tainted: [W]=WARN [ 47.347245][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 47.347250][ T50] Workqueue: hci0 hci_rx_work [ 47.347264][ T50] Call trace: [ 47.347267][ T50] show_stack+0x2c/0x3c (C) [ 47.347284][ T50] __dump_stack+0x30/0x40 [ 47.347295][ T50] dump_stack_lvl+0xd8/0x12c [ 47.347305][ T50] dump_stack+0x1c/0x28 [ 47.347314][ T50] sysfs_warn_dup+0x9c/0xb8 [ 47.347325][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 47.347335][ T50] kobject_add_internal+0x290/0x6f0 [ 47.347345][ T50] kobject_add_varg+0x9c/0xe8 [ 47.347352][ T50] kobject_add+0x110/0x1c8 [ 47.347359][ T50] device_add+0x394/0x9e0 [ 47.347367][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 47.347377][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 47.347386][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 47.347394][ T50] hci_le_meta_evt+0x2b0/0x46c [ 47.347403][ T50] hci_event_packet+0x4c0/0x9c8 [ 47.347412][ T50] hci_rx_work+0x2f4/0xd78 [ 47.347419][ T50] process_scheduled_works+0x788/0x10b8 [ 47.347429][ T50] worker_thread+0x798/0xbd0 [ 47.347438][ T50] kthread+0x304/0x3d4 [ 47.347445][ T50] ret_from_fork+0x10/0x20 [ 47.347458][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 47.347469][ T50] Bluetooth: hci0: failed to register connection device [ 47.349388][ T4850] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 47.358955][ T1914] netdevsim netdevsim2 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 47.359072][ T1914] netdevsim netdevsim2 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 47.359150][ T1914] netdevsim netdevsim2 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 47.359213][ T1914] netdevsim netdevsim2 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 47.413444][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 47.413462][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 47.413474][ T50] Tainted: [W]=WARN [ 47.413478][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 47.413483][ T50] Workqueue: hci0 hci_rx_work [ 47.413497][ T50] Call trace: [ 47.413500][ T50] show_stack+0x2c/0x3c (C) [ 47.413515][ T50] __dump_stack+0x30/0x40 [ 47.413526][ T50] dump_stack_lvl+0xd8/0x12c [ 47.413535][ T50] dump_stack+0x1c/0x28 [ 47.413545][ T50] sysfs_warn_dup+0x9c/0xb8 [ 47.413556][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 47.413566][ T50] kobject_add_internal+0x290/0x6f0 [ 47.413575][ T50] kobject_add_varg+0x9c/0xe8 [ 47.413582][ T50] kobject_add+0x110/0x1c8 [ 47.413589][ T50] device_add+0x394/0x9e0 [ 47.413597][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 47.413607][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 47.413616][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 47.413624][ T50] hci_le_meta_evt+0x2b0/0x46c [ 47.413634][ T50] hci_event_packet+0x4c0/0x9c8 [ 47.413642][ T50] hci_rx_work+0x2f4/0xd78 [ 47.413649][ T50] process_scheduled_works+0x788/0x10b8 [ 47.413659][ T50] worker_thread+0x798/0xbd0 [ 47.413667][ T50] kthread+0x304/0x3d4 [ 47.413675][ T50] ret_from_fork+0x10/0x20 [ 47.413687][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 47.413699][ T50] Bluetooth: hci0: failed to register connection device [ 47.416562][ T4852] veth0_vlan: entered promiscuous mode [ 47.444093][ T4852] veth1_vlan: entered promiscuous mode [ 47.449862][ T4852] veth0_macvtap: entered promiscuous mode [ 47.454070][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 47.454085][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 47.454098][ T50] Tainted: [W]=WARN [ 47.454102][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 47.454113][ T50] Workqueue: hci0 hci_rx_work [ 47.454129][ T50] Call trace: [ 47.454133][ T50] show_stack+0x2c/0x3c (C) [ 47.454152][ T50] __dump_stack+0x30/0x40 [ 47.454165][ T50] dump_stack_lvl+0xd8/0x12c [ 47.454175][ T50] dump_stack+0x1c/0x28 [ 47.454184][ T50] sysfs_warn_dup+0x9c/0xb8 [ 47.454196][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 47.454205][ T50] kobject_add_internal+0x290/0x6f0 [ 47.454215][ T50] kobject_add_varg+0x9c/0xe8 [ 47.454222][ T50] kobject_add+0x110/0x1c8 [ 47.454229][ T50] device_add+0x394/0x9e0 [ 47.454237][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 47.454246][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 47.454256][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 47.454264][ T50] hci_le_meta_evt+0x2b0/0x46c [ 47.454274][ T50] hci_event_packet+0x4c0/0x9c8 [ 47.454282][ T50] hci_rx_work+0x2f4/0xd78 [ 47.454289][ T50] process_scheduled_works+0x788/0x10b8 [ 47.454298][ T50] worker_thread+0x798/0xbd0 [ 47.454307][ T50] kthread+0x304/0x3d4 [ 47.454315][ T50] ret_from_fork+0x10/0x20 [ 47.454332][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 47.454343][ T50] Bluetooth: hci0: failed to register connection device [ 47.487078][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 47.487097][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 47.487115][ T50] Tainted: [W]=WARN [ 47.487119][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 47.487125][ T50] Workqueue: hci0 hci_rx_work [ 47.487141][ T50] Call trace: [ 47.487145][ T50] show_stack+0x2c/0x3c (C) [ 47.487163][ T50] __dump_stack+0x30/0x40 [ 47.487174][ T50] dump_stack_lvl+0xd8/0x12c [ 47.487184][ T50] dump_stack+0x1c/0x28 [ 47.487194][ T50] sysfs_warn_dup+0x9c/0xb8 [ 47.487204][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 47.487214][ T50] kobject_add_internal+0x290/0x6f0 [ 47.487223][ T50] kobject_add_varg+0x9c/0xe8 [ 47.487230][ T50] kobject_add+0x110/0x1c8 [ 47.487237][ T50] device_add+0x394/0x9e0 [ 47.487245][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 47.487254][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 47.487263][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 47.487271][ T50] hci_le_meta_evt+0x2b0/0x46c [ 47.487280][ T50] hci_event_packet+0x4c0/0x9c8 [ 47.487289][ T50] hci_rx_work+0x2f4/0xd78 [ 47.487295][ T50] process_scheduled_works+0x788/0x10b8 [ 47.487305][ T50] worker_thread+0x798/0xbd0 [ 47.487314][ T50] kthread+0x304/0x3d4 [ 47.487321][ T50] ret_from_fork+0x10/0x20 [ 47.487334][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 47.487347][ T50] Bluetooth: hci0: failed to register connection device [ 47.499223][ T4841] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 47.504435][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 47.504449][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 47.504463][ T50] Tainted: [W]=WARN [ 47.504467][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 47.504473][ T50] Workqueue: hci0 hci_rx_work [ 47.504487][ T50] Call trace: [ 47.504490][ T50] show_stack+0x2c/0x3c (C) [ 47.504505][ T50] __dump_stack+0x30/0x40 [ 47.504516][ T50] dump_stack_lvl+0xd8/0x12c [ 47.504525][ T50] dump_stack+0x1c/0x28 [ 47.504535][ T50] sysfs_warn_dup+0x9c/0xb8 [ 47.504546][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 47.504555][ T50] kobject_add_internal+0x290/0x6f0 [ 47.504564][ T50] kobject_add_varg+0x9c/0xe8 [ 47.504571][ T50] kobject_add+0x110/0x1c8 [ 47.504578][ T50] device_add+0x394/0x9e0 [ 47.504586][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 47.504596][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 47.504604][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 47.504613][ T50] hci_le_meta_evt+0x2b0/0x46c [ 47.504622][ T50] hci_event_packet+0x4c0/0x9c8 [ 47.504631][ T50] hci_rx_work+0x2f4/0xd78 [ 47.504638][ T50] process_scheduled_works+0x788/0x10b8 [ 47.504647][ T50] worker_thread+0x798/0xbd0 [ 47.504656][ T50] kthread+0x304/0x3d4 [ 47.504664][ T50] ret_from_fork+0x10/0x20 [ 47.504676][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 47.504688][ T50] Bluetooth: hci0: failed to register connection device [ 47.514717][ T15] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 47.514731][ T15] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 47.523796][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 47.523808][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 47.523820][ T50] Tainted: [W]=WARN [ 47.523823][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 47.523828][ T50] Workqueue: hci0 hci_rx_work [ 47.523842][ T50] Call trace: [ 47.523845][ T50] show_stack+0x2c/0x3c (C) [ 47.523859][ T50] __dump_stack+0x30/0x40 [ 47.523869][ T50] dump_stack_lvl+0xd8/0x12c [ 47.523879][ T50] dump_stack+0x1c/0x28 [ 47.523888][ T50] sysfs_warn_dup+0x9c/0xb8 [ 47.523898][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 47.523908][ T50] kobject_add_internal+0x290/0x6f0 [ 47.523917][ T50] kobject_add_varg+0x9c/0xe8 [ 47.523924][ T50] kobject_add+0x110/0x1c8 [ 47.523931][ T50] device_add+0x394/0x9e0 [ 47.523939][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 47.523948][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 47.523957][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 47.523965][ T50] hci_le_meta_evt+0x2b0/0x46c [ 47.523975][ T50] hci_event_packet+0x4c0/0x9c8 [ 47.523983][ T50] hci_rx_work+0x2f4/0xd78 [ 47.523990][ T50] process_scheduled_works+0x788/0x10b8 [ 47.524000][ T50] worker_thread+0x798/0xbd0 [ 47.524008][ T50] kthread+0x304/0x3d4 [ 47.524016][ T50] ret_from_fork+0x10/0x20 [ 47.524028][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 47.524040][ T50] Bluetooth: hci0: failed to register connection device [ 47.535485][ T4852] veth1_macvtap: entered promiscuous mode [ 47.547639][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 47.547654][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 47.547666][ T50] Tainted: [W]=WARN [ 47.547669][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 47.547674][ T50] Workqueue: hci0 hci_rx_work [ 47.547688][ T50] Call trace: [ 47.547691][ T50] show_stack+0x2c/0x3c (C) [ 47.547705][ T50] __dump_stack+0x30/0x40 [ 47.547717][ T50] dump_stack_lvl+0xd8/0x12c [ 47.547726][ T50] dump_stack+0x1c/0x28 [ 47.547736][ T50] sysfs_warn_dup+0x9c/0xb8 [ 47.547747][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 47.547756][ T50] kobject_add_internal+0x290/0x6f0 [ 47.547766][ T50] kobject_add_varg+0x9c/0xe8 [ 47.547773][ T50] kobject_add+0x110/0x1c8 [ 47.547780][ T50] device_add+0x394/0x9e0 [ 47.547787][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 47.547798][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 47.547806][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 47.547814][ T50] hci_le_meta_evt+0x2b0/0x46c [ 47.547824][ T50] hci_event_packet+0x4c0/0x9c8 [ 47.547832][ T50] hci_rx_work+0x2f4/0xd78 [ 47.547839][ T50] process_scheduled_works+0x788/0x10b8 [ 47.547849][ T50] worker_thread+0x798/0xbd0 [ 47.547857][ T50] kthread+0x304/0x3d4 [ 47.547865][ T50] ret_from_fork+0x10/0x20 [ 47.547877][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 47.547888][ T50] Bluetooth: hci0: failed to register connection device [ 47.562827][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 47.562844][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 47.562857][ T50] Tainted: [W]=WARN [ 47.562860][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 47.562866][ T50] Workqueue: hci0 hci_rx_work [ 47.562880][ T50] Call trace: [ 47.562883][ T50] show_stack+0x2c/0x3c (C) [ 47.562899][ T50] __dump_stack+0x30/0x40 [ 47.562910][ T50] dump_stack_lvl+0xd8/0x12c [ 47.562920][ T50] dump_stack+0x1c/0x28 [ 47.562930][ T50] sysfs_warn_dup+0x9c/0xb8 [ 47.562941][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 47.562951][ T50] kobject_add_internal+0x290/0x6f0 [ 47.562960][ T50] kobject_add_varg+0x9c/0xe8 [ 47.562967][ T50] kobject_add+0x110/0x1c8 [ 47.562974][ T50] device_add+0x394/0x9e0 [ 47.562982][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 47.562991][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 47.563000][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 47.563009][ T50] hci_le_meta_evt+0x2b0/0x46c [ 47.563018][ T50] hci_event_packet+0x4c0/0x9c8 [ 47.563027][ T50] hci_rx_work+0x2f4/0xd78 [ 47.563034][ T50] process_scheduled_works+0x788/0x10b8 [ 47.563044][ T50] worker_thread+0x798/0xbd0 [ 47.563052][ T50] kthread+0x304/0x3d4 [ 47.563060][ T50] ret_from_fork+0x10/0x20 [ 47.563074][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 47.563086][ T50] Bluetooth: hci0: failed to register connection device [ 47.568016][ T4852] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 47.569022][ T4852] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 47.578704][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 47.578719][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 47.578731][ T50] Tainted: [W]=WARN [ 47.578734][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 47.578740][ T50] Workqueue: hci0 hci_rx_work [ 47.578753][ T50] Call trace: [ 47.578756][ T50] show_stack+0x2c/0x3c (C) [ 47.578771][ T50] __dump_stack+0x30/0x40 [ 47.578781][ T50] dump_stack_lvl+0xd8/0x12c [ 47.578791][ T50] dump_stack+0x1c/0x28 [ 47.578801][ T50] sysfs_warn_dup+0x9c/0xb8 [ 47.578811][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 47.578821][ T50] kobject_add_internal+0x290/0x6f0 [ 47.578830][ T50] kobject_add_varg+0x9c/0xe8 [ 47.578837][ T50] kobject_add+0x110/0x1c8 [ 47.578844][ T50] device_add+0x394/0x9e0 [ 47.578852][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 47.578861][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 47.578870][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 47.578878][ T50] hci_le_meta_evt+0x2b0/0x46c [ 47.578887][ T50] hci_event_packet+0x4c0/0x9c8 [ 47.578896][ T50] hci_rx_work+0x2f4/0xd78 [ 47.578903][ T50] process_scheduled_works+0x788/0x10b8 [ 47.578913][ T50] worker_thread+0x798/0xbd0 [ 47.578922][ T50] kthread+0x304/0x3d4 [ 47.578929][ T50] ret_from_fork+0x10/0x20 [ 47.578942][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 47.578954][ T50] Bluetooth: hci0: failed to register connection device [ 47.594060][ T1914] netdevsim netdevsim3 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 47.594096][ T1914] netdevsim netdevsim3 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 47.594120][ T1914] netdevsim netdevsim3 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 47.594138][ T1914] netdevsim netdevsim3 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 47.594259][ T1914] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 47.594269][ T1914] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 47.599317][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 47.599331][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 47.599347][ T50] Tainted: [W]=WARN [ 47.599351][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 47.599357][ T50] Workqueue: hci0 hci_rx_work [ 47.599373][ T50] Call trace: [ 47.599377][ T50] show_stack+0x2c/0x3c (C) [ 47.599393][ T50] __dump_stack+0x30/0x40 [ 47.599404][ T50] dump_stack_lvl+0xd8/0x12c [ 47.599414][ T50] dump_stack+0x1c/0x28 [ 47.599424][ T50] sysfs_warn_dup+0x9c/0xb8 [ 47.599435][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 47.599444][ T50] kobject_add_internal+0x290/0x6f0 [ 47.599453][ T50] kobject_add_varg+0x9c/0xe8 [ 47.599460][ T50] kobject_add+0x110/0x1c8 [ 47.599467][ T50] device_add+0x394/0x9e0 [ 47.599475][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 47.599485][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 47.599494][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 47.599502][ T50] hci_le_meta_evt+0x2b0/0x46c [ 47.599511][ T50] hci_event_packet+0x4c0/0x9c8 [ 47.599519][ T50] hci_rx_work+0x2f4/0xd78 [ 47.599526][ T50] process_scheduled_works+0x788/0x10b8 [ 47.599536][ T50] worker_thread+0x798/0xbd0 [ 47.599544][ T50] kthread+0x304/0x3d4 [ 47.599552][ T50] ret_from_fork+0x10/0x20 [ 47.599579][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 47.599595][ T50] Bluetooth: hci0: failed to register connection device [ 47.618858][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 47.618875][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 47.618888][ T50] Tainted: [W]=WARN [ 47.618891][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 47.618897][ T50] Workqueue: hci0 hci_rx_work [ 47.618911][ T50] Call trace: [ 47.618915][ T50] show_stack+0x2c/0x3c (C) [ 47.618931][ T50] __dump_stack+0x30/0x40 [ 47.618941][ T50] dump_stack_lvl+0xd8/0x12c [ 47.618952][ T50] dump_stack+0x1c/0x28 [ 47.618961][ T50] sysfs_warn_dup+0x9c/0xb8 [ 47.618972][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 47.618982][ T50] kobject_add_internal+0x290/0x6f0 [ 47.618991][ T50] kobject_add_varg+0x9c/0xe8 [ 47.618999][ T50] kobject_add+0x110/0x1c8 [ 47.619006][ T50] device_add+0x394/0x9e0 [ 47.619013][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 47.619023][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 47.619032][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 47.619040][ T50] hci_le_meta_evt+0x2b0/0x46c [ 47.619049][ T50] hci_event_packet+0x4c0/0x9c8 [ 47.619058][ T50] hci_rx_work+0x2f4/0xd78 [ 47.619064][ T50] process_scheduled_works+0x788/0x10b8 [ 47.619074][ T50] worker_thread+0x798/0xbd0 [ 47.619083][ T50] kthread+0x304/0x3d4 [ 47.619091][ T50] ret_from_fork+0x10/0x20 [ 47.619104][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 47.619125][ T50] Bluetooth: hci0: failed to register connection device [ 47.651019][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 47.651037][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 47.651050][ T50] Tainted: [W]=WARN [ 47.651054][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 47.651060][ T50] Workqueue: hci0 hci_rx_work [ 47.651074][ T50] Call trace: [ 47.651078][ T50] show_stack+0x2c/0x3c (C) [ 47.651093][ T50] __dump_stack+0x30/0x40 [ 47.651105][ T50] dump_stack_lvl+0xd8/0x12c [ 47.651122][ T50] dump_stack+0x1c/0x28 [ 47.651132][ T50] sysfs_warn_dup+0x9c/0xb8 [ 47.651144][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 47.651154][ T50] kobject_add_internal+0x290/0x6f0 [ 47.651164][ T50] kobject_add_varg+0x9c/0xe8 [ 47.651171][ T50] kobject_add+0x110/0x1c8 [ 47.651178][ T50] device_add+0x394/0x9e0 [ 47.651186][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 47.651196][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 47.651205][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 47.651213][ T50] hci_le_meta_evt+0x2b0/0x46c [ 47.651223][ T50] hci_event_packet+0x4c0/0x9c8 [ 47.651232][ T50] hci_rx_work+0x2f4/0xd78 [ 47.651238][ T50] process_scheduled_works+0x788/0x10b8 [ 47.651248][ T50] worker_thread+0x798/0xbd0 [ 47.651257][ T50] kthread+0x304/0x3d4 [ 47.651265][ T50] ret_from_fork+0x10/0x20 [ 47.651278][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 47.651291][ T50] Bluetooth: hci0: failed to register connection device [ 47.654369][ T4841] veth0_vlan: entered promiscuous mode [ 47.664327][ T4857] veth0_vlan: entered promiscuous mode [ 47.666018][ T4857] veth1_vlan: entered promiscuous mode [ 47.675367][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 47.675381][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 47.675393][ T50] Tainted: [W]=WARN [ 47.675396][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 47.675401][ T50] Workqueue: hci0 hci_rx_work [ 47.675416][ T50] Call trace: [ 47.675418][ T50] show_stack+0x2c/0x3c (C) [ 47.675432][ T50] __dump_stack+0x30/0x40 [ 47.675443][ T50] dump_stack_lvl+0xd8/0x12c [ 47.675452][ T50] dump_stack+0x1c/0x28 [ 47.675462][ T50] sysfs_warn_dup+0x9c/0xb8 [ 47.675472][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 47.675482][ T50] kobject_add_internal+0x290/0x6f0 [ 47.675491][ T50] kobject_add_varg+0x9c/0xe8 [ 47.675498][ T50] kobject_add+0x110/0x1c8 [ 47.675505][ T50] device_add+0x394/0x9e0 [ 47.675513][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 47.675522][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 47.675531][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 47.675539][ T50] hci_le_meta_evt+0x2b0/0x46c [ 47.675549][ T50] hci_event_packet+0x4c0/0x9c8 [ 47.675557][ T50] hci_rx_work+0x2f4/0xd78 [ 47.675564][ T50] process_scheduled_works+0x788/0x10b8 [ 47.675573][ T50] worker_thread+0x798/0xbd0 [ 47.675582][ T50] kthread+0x304/0x3d4 [ 47.675590][ T50] ret_from_fork+0x10/0x20 [ 47.675602][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 47.675614][ T50] Bluetooth: hci0: failed to register connection device [ 47.716133][ T50] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 47.716151][ T50] CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G W syzkaller #0 PREEMPT [ 47.716163][ T50] Tainted: [W]=WARN [ 47.716167][ T50] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 47.716172][ T50] Workqueue: hci0 hci_rx_work [ 47.716186][ T50] Call trace: [ 47.716189][ T50] show_stack+0x2c/0x3c (C) [ 47.716203][ T50] __dump_stack+0x30/0x40 [ 47.716214][ T50] dump_stack_lvl+0xd8/0x12c [ 47.716224][ T50] dump_stack+0x1c/0x28 [ 47.716234][ T50] sysfs_warn_dup+0x9c/0xb8 [ 47.716245][ T50] sysfs_create_dir_ns+0x190/0x1f4 [ 47.716254][ T50] kobject_add_internal+0x290/0x6f0 [ 47.716263][ T50] kobject_add_varg+0x9c/0xe8 [ 47.716270][ T50] kobject_add+0x110/0x1c8 [ 47.716277][ T50] device_add+0x394/0x9e0 [ 47.716285][ T50] hci_conn_add_sysfs+0xbc/0x1e8 [ 47.716295][ T50] le_conn_complete_evt+0xc68/0x10f8 [ 47.716304][ T50] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 47.716313][ T50] hci_le_meta_evt+0x2b0/0x46c [ 47.716322][ T50] hci_event_packet+0x4c0/0x9c8 [ 47.716331][ T50] hci_rx_work+0x2f4/0xd78 [ 47.716338][ T50] process_scheduled_works+0x788/0x10b8 [ 47.716348][ T50] worker_thread+0x798/0xbd0 [ 47.716356][ T50] kthread+0x304/0x3d4 [ 47.716364][ T50] ret_from_fork+0x10/0x20 [ 47.716377][ T50] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 47.716388][ T50] Bluetooth: hci0: failed to register connection device [ 47.751598][ T4856] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 47.751613][ T4856] CPU: 1 UID: 0 PID: 4856 Comm: kworker/u9:3 Tainted: G W syzkaller #0 PREEMPT [ 47.751625][ T4856] Tainted: [W]=WARN [ 47.751629][ T4856] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 47.751634][ T4856] Workqueue: hci0 hci_rx_work [ 47.751649][ T4856] Call trace: [ 47.751652][ T4856] show_stack+0x2c/0x3c (C) [ 47.751668][ T4856] __dump_stack+0x30/0x40 [ 47.751678][ T4856] dump_stack_lvl+0xd8/0x12c [ 47.751688][ T4856] dump_stack+0x1c/0x28 [ 47.751697][ T4856] sysfs_warn_dup+0x9c/0xb8 [ 47.751708][ T4856] sysfs_create_dir_ns+0x190/0x1f4 [ 47.751718][ T4856] kobject_add_internal+0x290/0x6f0 [ 47.751727][ T4856] kobject_add_varg+0x9c/0xe8 [ 47.751735][ T4856] kobject_add+0x110/0x1c8 [ 47.751742][ T4856] device_add+0x394/0x9e0 [ 47.751750][ T4856] hci_conn_add_sysfs+0xbc/0x1e8 [ 47.751760][ T4856] le_conn_complete_evt+0xc68/0x10f8 [ 47.751768][ T4856] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 47.751777][ T4856] hci_le_meta_evt+0x2b0/0x46c [ 47.751786][ T4856] hci_event_packet+0x4c0/0x9c8 [ 47.751795][ T4856] hci_rx_work+0x2f4/0xd78 [ 47.751802][ T4856] process_scheduled_works+0x788/0x10b8 [ 47.751812][ T4856] worker_thread+0x798/0xbd0 [ 47.751821][ T4856] kthread+0x304/0x3d4 [ 47.751828][ T4856] ret_from_fork+0x10/0x20 [ 47.751841][ T4856] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 47.751852][ T4856] Bluetooth: hci0: failed to register connection device [ 47.757213][ T4857] veth0_macvtap: entered promiscuous mode [ 47.768129][ T4856] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 47.768145][ T4856] CPU: 1 UID: 0 PID: 4856 Comm: kworker/u9:3 Tainted: G W syzkaller #0 PREEMPT [ 47.768159][ T4856] Tainted: [W]=WARN [ 47.768163][ T4856] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 47.768168][ T4856] Workqueue: hci2 hci_rx_work [ 47.768181][ T4856] Call trace: [ 47.768184][ T4856] show_stack+0x2c/0x3c (C) [ 47.768199][ T4856] __dump_stack+0x30/0x40 [ 47.768210][ T4856] dump_stack_lvl+0xd8/0x12c [ 47.768220][ T4856] dump_stack+0x1c/0x28 [ 47.768230][ T4856] sysfs_warn_dup+0x9c/0xb8 [ 47.768240][ T4856] sysfs_create_dir_ns+0x190/0x1f4 [ 47.768250][ T4856] kobject_add_internal+0x290/0x6f0 [ 47.768260][ T4856] kobject_add_varg+0x9c/0xe8 [ 47.768267][ T4856] kobject_add+0x110/0x1c8 [ 47.768274][ T4856] device_add+0x394/0x9e0 [ 47.768282][ T4856] hci_conn_add_sysfs+0xbc/0x1e8 [ 47.768291][ T4856] le_conn_complete_evt+0xc68/0x10f8 [ 47.768300][ T4856] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 47.768308][ T4856] hci_le_meta_evt+0x2b0/0x46c [ 47.768318][ T4856] hci_event_packet+0x4c0/0x9c8 [ 47.768327][ T4856] hci_rx_work+0x2f4/0xd78 [ 47.768334][ T4856] process_scheduled_works+0x788/0x10b8 [ 47.768343][ T4856] worker_thread+0x798/0xbd0 [ 47.768352][ T4856] kthread+0x304/0x3d4 [ 47.768360][ T4856] ret_from_fork+0x10/0x20 [ 47.768373][ T4856] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 47.768385][ T4856] Bluetooth: hci2: failed to register connection device [ 47.788584][ T4856] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 47.788600][ T4856] CPU: 1 UID: 0 PID: 4856 Comm: kworker/u9:3 Tainted: G W syzkaller #0 PREEMPT [ 47.788612][ T4856] Tainted: [W]=WARN [ 47.788615][ T4856] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 47.788620][ T4856] Workqueue: hci0 hci_rx_work [ 47.788635][ T4856] Call trace: [ 47.788638][ T4856] show_stack+0x2c/0x3c (C) [ 47.788653][ T4856] __dump_stack+0x30/0x40 [ 47.788664][ T4856] dump_stack_lvl+0xd8/0x12c [ 47.788674][ T4856] dump_stack+0x1c/0x28 [ 47.788684][ T4856] sysfs_warn_dup+0x9c/0xb8 [ 47.788695][ T4856] sysfs_create_dir_ns+0x190/0x1f4 [ 47.788705][ T4856] kobject_add_internal+0x290/0x6f0 [ 47.788714][ T4856] kobject_add_varg+0x9c/0xe8 [ 47.788721][ T4856] kobject_add+0x110/0x1c8 [ 47.788728][ T4856] device_add+0x394/0x9e0 [ 47.788736][ T4856] hci_conn_add_sysfs+0xbc/0x1e8 [ 47.788746][ T4856] le_conn_complete_evt+0xc68/0x10f8 [ 47.788754][ T4856] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 47.788763][ T4856] hci_le_meta_evt+0x2b0/0x46c [ 47.788772][ T4856] hci_event_packet+0x4c0/0x9c8 [ 47.788781][ T4856] hci_rx_work+0x2f4/0xd78 [ 47.788788][ T4856] process_scheduled_works+0x788/0x10b8 [ 47.788798][ T4856] worker_thread+0x798/0xbd0 [ 47.788806][ T4856] kthread+0x304/0x3d4 [ 47.788814][ T4856] ret_from_fork+0x10/0x20 [ 47.788827][ T4856] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 47.788840][ T4856] Bluetooth: hci0: failed to register connection device [ 47.794438][ T4841] veth1_vlan: entered promiscuous mode [ 47.803794][ T4856] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 47.803808][ T4856] CPU: 1 UID: 0 PID: 4856 Comm: kworker/u9:3 Tainted: G W syzkaller #0 PREEMPT [ 47.803821][ T4856] Tainted: [W]=WARN [ 47.803824][ T4856] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 47.803830][ T4856] Workqueue: hci2 hci_rx_work [ 47.803843][ T4856] Call trace: [ 47.803846][ T4856] show_stack+0x2c/0x3c (C) [ 47.803861][ T4856] __dump_stack+0x30/0x40 [ 47.803871][ T4856] dump_stack_lvl+0xd8/0x12c [ 47.803881][ T4856] dump_stack+0x1c/0x28 [ 47.803891][ T4856] sysfs_warn_dup+0x9c/0xb8 [ 47.803902][ T4856] sysfs_create_dir_ns+0x190/0x1f4 [ 47.803912][ T4856] kobject_add_internal+0x290/0x6f0 [ 47.803921][ T4856] kobject_add_varg+0x9c/0xe8 [ 47.803928][ T4856] kobject_add+0x110/0x1c8 [ 47.803936][ T4856] device_add+0x394/0x9e0 [ 47.803943][ T4856] hci_conn_add_sysfs+0xbc/0x1e8 [ 47.803953][ T4856] le_conn_complete_evt+0xc68/0x10f8 [ 47.803962][ T4856] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 47.803970][ T4856] hci_le_meta_evt+0x2b0/0x46c [ 47.803979][ T4856] hci_event_packet+0x4c0/0x9c8 [ 47.803988][ T4856] hci_rx_work+0x2f4/0xd78 [ 47.803995][ T4856] process_scheduled_works+0x788/0x10b8 [ 47.804005][ T4856] worker_thread+0x798/0xbd0 [ 47.804013][ T4856] kthread+0x304/0x3d4 [ 47.804021][ T4856] ret_from_fork+0x10/0x20 [ 47.804035][ T4856] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 47.804046][ T4856] Bluetooth: hci2: failed to register connection device [ 47.817784][ T4856] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 47.817798][ T4856] CPU: 1 UID: 0 PID: 4856 Comm: kworker/u9:3 Tainted: G W syzkaller #0 PREEMPT [ 47.817809][ T4856] Tainted: [W]=WARN [ 47.817813][ T4856] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 47.817817][ T4856] Workqueue: hci0 hci_rx_work [ 47.817830][ T4856] Call trace: [ 47.817833][ T4856] show_stack+0x2c/0x3c (C) [ 47.817847][ T4856] __dump_stack+0x30/0x40 [ 47.817858][ T4856] dump_stack_lvl+0xd8/0x12c [ 47.817868][ T4856] dump_stack+0x1c/0x28 [ 47.817877][ T4856] sysfs_warn_dup+0x9c/0xb8 [ 47.817888][ T4856] sysfs_create_dir_ns+0x190/0x1f4 [ 47.817897][ T4856] kobject_add_internal+0x290/0x6f0 [ 47.817906][ T4856] kobject_add_varg+0x9c/0xe8 [ 47.817914][ T4856] kobject_add+0x110/0x1c8 [ 47.817921][ T4856] device_add+0x394/0x9e0 [ 47.817928][ T4856] hci_conn_add_sysfs+0xbc/0x1e8 [ 47.817938][ T4856] le_conn_complete_evt+0xc68/0x10f8 [ 47.817947][ T4856] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 47.817956][ T4856] hci_le_meta_evt+0x2b0/0x46c [ 47.817965][ T4856] hci_event_packet+0x4c0/0x9c8 [ 47.817973][ T4856] hci_rx_work+0x2f4/0xd78 [ 47.817980][ T4856] process_scheduled_works+0x788/0x10b8 [ 47.817990][ T4856] worker_thread+0x798/0xbd0 [ 47.817998][ T4856] kthread+0x304/0x3d4 [ 47.818006][ T4856] ret_from_fork+0x10/0x20 [ 47.818018][ T4856] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 47.818030][ T4856] Bluetooth: hci0: failed to register connection device [ 47.833696][ T4857] veth1_macvtap: entered promiscuous mode [ 47.838548][ T4856] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 47.838564][ T4856] CPU: 1 UID: 0 PID: 4856 Comm: kworker/u9:3 Tainted: G W syzkaller #0 PREEMPT [ 47.838576][ T4856] Tainted: [W]=WARN [ 47.838580][ T4856] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 47.838585][ T4856] Workqueue: hci0 hci_rx_work [ 47.838599][ T4856] Call trace: [ 47.838603][ T4856] show_stack+0x2c/0x3c (C) [ 47.838618][ T4856] __dump_stack+0x30/0x40 [ 47.838630][ T4856] dump_stack_lvl+0xd8/0x12c [ 47.838640][ T4856] dump_stack+0x1c/0x28 [ 47.838649][ T4856] sysfs_warn_dup+0x9c/0xb8 [ 47.838661][ T4856] sysfs_create_dir_ns+0x190/0x1f4 [ 47.838670][ T4856] kobject_add_internal+0x290/0x6f0 [ 47.838680][ T4856] kobject_add_varg+0x9c/0xe8 [ 47.838687][ T4856] kobject_add+0x110/0x1c8 [ 47.838694][ T4856] device_add+0x394/0x9e0 [ 47.838702][ T4856] hci_conn_add_sysfs+0xbc/0x1e8 [ 47.838712][ T4856] le_conn_complete_evt+0xc68/0x10f8 [ 47.838720][ T4856] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 47.838729][ T4856] hci_le_meta_evt+0x2b0/0x46c [ 47.838738][ T4856] hci_event_packet+0x4c0/0x9c8 [ 47.838747][ T4856] hci_rx_work+0x2f4/0xd78 [ 47.838754][ T4856] process_scheduled_works+0x788/0x10b8 [ 47.838764][ T4856] worker_thread+0x798/0xbd0 [ 47.838773][ T4856] kthread+0x304/0x3d4 [ 47.838780][ T4856] ret_from_fork+0x10/0x20 [ 47.838794][ T4856] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 47.838805][ T4856] Bluetooth: hci0: failed to register connection device [ 47.841978][ T4856] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 47.841988][ T4856] CPU: 1 UID: 0 PID: 4856 Comm: kworker/u9:3 Tainted: G W syzkaller #0 PREEMPT [ 47.841999][ T4856] Tainted: [W]=WARN [ 47.842002][ T4856] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 47.842008][ T4856] Workqueue: hci2 hci_rx_work [ 47.842018][ T4856] Call trace: [ 47.842020][ T4856] show_stack+0x2c/0x3c (C) [ 47.842032][ T4856] __dump_stack+0x30/0x40 [ 47.842043][ T4856] dump_stack_lvl+0xd8/0x12c [ 47.842053][ T4856] dump_stack+0x1c/0x28 [ 47.842062][ T4856] sysfs_warn_dup+0x9c/0xb8 [ 47.842073][ T4856] sysfs_create_dir_ns+0x190/0x1f4 [ 47.842083][ T4856] kobject_add_internal+0x290/0x6f0 [ 47.842091][ T4856] kobject_add_varg+0x9c/0xe8 [ 47.842098][ T4856] kobject_add+0x110/0x1c8 [ 47.842105][ T4856] device_add+0x394/0x9e0 [ 47.842119][ T4856] hci_conn_add_sysfs+0xbc/0x1e8 [ 47.842129][ T4856] le_conn_complete_evt+0xc68/0x10f8 [ 47.842139][ T4856] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 47.842148][ T4856] hci_le_meta_evt+0x2b0/0x46c [ 47.842159][ T4856] hci_event_packet+0x4c0/0x9c8 [ 47.842167][ T4856] hci_rx_work+0x2f4/0xd78 [ 47.842174][ T4856] process_scheduled_works+0x788/0x10b8 [ 47.842183][ T4856] worker_thread+0x798/0xbd0 [ 47.842192][ T4856] kthread+0x304/0x3d4 [ 47.842200][ T4856] ret_from_fork+0x10/0x20 [ 47.842212][ T4856] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 47.842223][ T4856] Bluetooth: hci2: failed to register connection device [ 47.856605][ T1285] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 47.856614][ T1285] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 47.882574][ T4856] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 47.882591][ T4856] CPU: 1 UID: 0 PID: 4856 Comm: kworker/u9:3 Tainted: G W syzkaller #0 PREEMPT [ 47.882603][ T4856] Tainted: [W]=WARN [ 47.882607][ T4856] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 47.882612][ T4856] Workqueue: hci2 hci_rx_work [ 47.882627][ T4856] Call trace: [ 47.882630][ T4856] show_stack+0x2c/0x3c (C) [ 47.882645][ T4856] __dump_stack+0x30/0x40 [ 47.882656][ T4856] dump_stack_lvl+0xd8/0x12c [ 47.882666][ T4856] dump_stack+0x1c/0x28 [ 47.882676][ T4856] sysfs_warn_dup+0x9c/0xb8 [ 47.882687][ T4856] sysfs_create_dir_ns+0x190/0x1f4 [ 47.882697][ T4856] kobject_add_internal+0x290/0x6f0 [ 47.882707][ T4856] kobject_add_varg+0x9c/0xe8 [ 47.882714][ T4856] kobject_add+0x110/0x1c8 [ 47.882721][ T4856] device_add+0x394/0x9e0 [ 47.882729][ T4856] hci_conn_add_sysfs+0xbc/0x1e8 [ 47.882738][ T4856] le_conn_complete_evt+0xc68/0x10f8 [ 47.882748][ T4856] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 47.882756][ T4856] hci_le_meta_evt+0x2b0/0x46c [ 47.882766][ T4856] hci_event_packet+0x4c0/0x9c8 [ 47.882774][ T4856] hci_rx_work+0x2f4/0xd78 [ 47.882781][ T4856] process_scheduled_works+0x788/0x10b8 [ 47.882791][ T4856] worker_thread+0x798/0xbd0 [ 47.882800][ T4856] kthread+0x304/0x3d4 [ 47.882807][ T4856] ret_from_fork+0x10/0x20 [ 47.882820][ T4856] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 47.882832][ T4856] Bluetooth: hci2: failed to register connection device [ 47.886158][ T4857] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 47.903372][ T4856] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 47.903389][ T4856] CPU: 1 UID: 0 PID: 4856 Comm: kworker/u9:3 Tainted: G W syzkaller #0 PREEMPT [ 47.903401][ T4856] Tainted: [W]=WARN [ 47.903404][ T4856] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 47.903409][ T4856] Workqueue: hci0 hci_rx_work [ 47.903423][ T4856] Call trace: [ 47.903426][ T4856] show_stack+0x2c/0x3c (C) [ 47.903442][ T4856] __dump_stack+0x30/0x40 [ 47.903453][ T4856] dump_stack_lvl+0xd8/0x12c [ 47.903463][ T4856] dump_stack+0x1c/0x28 [ 47.903473][ T4856] sysfs_warn_dup+0x9c/0xb8 [ 47.903484][ T4856] sysfs_create_dir_ns+0x190/0x1f4 [ 47.903494][ T4856] kobject_add_internal+0x290/0x6f0 [ 47.903503][ T4856] kobject_add_varg+0x9c/0xe8 [ 47.903510][ T4856] kobject_add+0x110/0x1c8 [ 47.903517][ T4856] device_add+0x394/0x9e0 [ 47.903525][ T4856] hci_conn_add_sysfs+0xbc/0x1e8 [ 47.903535][ T4856] le_conn_complete_evt+0xc68/0x10f8 [ 47.903544][ T4856] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 47.903552][ T4856] hci_le_meta_evt+0x2b0/0x46c [ 47.903562][ T4856] hci_event_packet+0x4c0/0x9c8 [ 47.903571][ T4856] hci_rx_work+0x2f4/0xd78 [ 47.903578][ T4856] process_scheduled_works+0x788/0x10b8 [ 47.903587][ T4856] worker_thread+0x798/0xbd0 [ 47.903596][ T4856] kthread+0x304/0x3d4 [ 47.903604][ T4856] ret_from_fork+0x10/0x20 [ 47.903616][ T4856] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 47.903627][ T4856] Bluetooth: hci0: failed to register connection device [ 47.913423][ T4857] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 47.922860][ T4856] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 47.922875][ T4856] CPU: 1 UID: 0 PID: 4856 Comm: kworker/u9:3 Tainted: G W syzkaller #0 PREEMPT [ 47.922888][ T4856] Tainted: [W]=WARN [ 47.922891][ T4856] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 47.922896][ T4856] Workqueue: hci2 hci_rx_work [ 47.922910][ T4856] Call trace: [ 47.922913][ T4856] show_stack+0x2c/0x3c (C) [ 47.922928][ T4856] __dump_stack+0x30/0x40 [ 47.922939][ T4856] dump_stack_lvl+0xd8/0x12c [ 47.922949][ T4856] dump_stack+0x1c/0x28 [ 47.922958][ T4856] sysfs_warn_dup+0x9c/0xb8 [ 47.922969][ T4856] sysfs_create_dir_ns+0x190/0x1f4 [ 47.922979][ T4856] kobject_add_internal+0x290/0x6f0 [ 47.922988][ T4856] kobject_add_varg+0x9c/0xe8 [ 47.922995][ T4856] kobject_add+0x110/0x1c8 [ 47.923002][ T4856] device_add+0x394/0x9e0 [ 47.923010][ T4856] hci_conn_add_sysfs+0xbc/0x1e8 [ 47.923019][ T4856] le_conn_complete_evt+0xc68/0x10f8 [ 47.923028][ T4856] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 47.923036][ T4856] hci_le_meta_evt+0x2b0/0x46c [ 47.923045][ T4856] hci_event_packet+0x4c0/0x9c8 [ 47.923054][ T4856] hci_rx_work+0x2f4/0xd78 [ 47.923061][ T4856] process_scheduled_works+0x788/0x10b8 [ 47.923070][ T4856] worker_thread+0x798/0xbd0 [ 47.923078][ T4856] kthread+0x304/0x3d4 [ 47.923086][ T4856] ret_from_fork+0x10/0x20 [ 47.923099][ T4856] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 47.923120][ T4856] Bluetooth: hci2: failed to register connection device [ 47.941906][ T4856] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 47.941922][ T4856] CPU: 1 UID: 0 PID: 4856 Comm: kworker/u9:3 Tainted: G W syzkaller #0 PREEMPT [ 47.941934][ T4856] Tainted: [W]=WARN [ 47.941937][ T4856] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 47.941942][ T4856] Workqueue: hci0 hci_rx_work [ 47.941956][ T4856] Call trace: [ 47.941959][ T4856] show_stack+0x2c/0x3c (C) [ 47.941975][ T4856] __dump_stack+0x30/0x40 [ 47.941986][ T4856] dump_stack_lvl+0xd8/0x12c [ 47.941996][ T4856] dump_stack+0x1c/0x28 [ 47.942006][ T4856] sysfs_warn_dup+0x9c/0xb8 [ 47.942016][ T4856] sysfs_create_dir_ns+0x190/0x1f4 [ 47.942026][ T4856] kobject_add_internal+0x290/0x6f0 [ 47.942036][ T4856] kobject_add_varg+0x9c/0xe8 [ 47.942043][ T4856] kobject_add+0x110/0x1c8 [ 47.942050][ T4856] device_add+0x394/0x9e0 [ 47.942057][ T4856] hci_conn_add_sysfs+0xbc/0x1e8 [ 47.942067][ T4856] le_conn_complete_evt+0xc68/0x10f8 [ 47.942076][ T4856] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 47.942084][ T4856] hci_le_meta_evt+0x2b0/0x46c [ 47.942093][ T4856] hci_event_packet+0x4c0/0x9c8 [ 47.942102][ T4856] hci_rx_work+0x2f4/0xd78 [ 47.942115][ T4856] process_scheduled_works+0x788/0x10b8 [ 47.942125][ T4856] worker_thread+0x798/0xbd0 [ 47.942134][ T4856] kthread+0x304/0x3d4 [ 47.942142][ T4856] ret_from_fork+0x10/0x20 [ 47.942158][ T4856] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 47.942172][ T4856] Bluetooth: hci0: failed to register connection device [ 47.952270][ T4856] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 47.952283][ T4856] CPU: 1 UID: 0 PID: 4856 Comm: kworker/u9:3 Tainted: G W syzkaller #0 PREEMPT [ 47.952294][ T4856] Tainted: [W]=WARN [ 47.952297][ T4856] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 47.952302][ T4856] Workqueue: hci2 hci_rx_work [ 47.952315][ T4856] Call trace: [ 47.952317][ T4856] show_stack+0x2c/0x3c (C) [ 47.952330][ T4856] __dump_stack+0x30/0x40 [ 47.952340][ T4856] dump_stack_lvl+0xd8/0x12c [ 47.952350][ T4856] dump_stack+0x1c/0x28 [ 47.952360][ T4856] sysfs_warn_dup+0x9c/0xb8 [ 47.952370][ T4856] sysfs_create_dir_ns+0x190/0x1f4 [ 47.952379][ T4856] kobject_add_internal+0x290/0x6f0 [ 47.952388][ T4856] kobject_add_varg+0x9c/0xe8 [ 47.952395][ T4856] kobject_add+0x110/0x1c8 [ 47.952401][ T4856] device_add+0x394/0x9e0 [ 47.952409][ T4856] hci_conn_add_sysfs+0xbc/0x1e8 [ 47.952418][ T4856] le_conn_complete_evt+0xc68/0x10f8 [ 47.952426][ T4856] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 47.952434][ T4856] hci_le_meta_evt+0x2b0/0x46c [ 47.952443][ T4856] hci_event_packet+0x4c0/0x9c8 [ 47.952452][ T4856] hci_rx_work+0x2f4/0xd78 [ 47.952459][ T4856] process_scheduled_works+0x788/0x10b8 [ 47.952468][ T4856] worker_thread+0x798/0xbd0 [ 47.952477][ T4856] kthread+0x304/0x3d4 [ 47.952484][ T4856] ret_from_fork+0x10/0x20 [ 47.952497][ T4856] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 47.952509][ T4856] Bluetooth: hci2: failed to register connection device [ 47.970825][ T1927] netdevsim netdevsim4 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 47.970865][ T1927] netdevsim netdevsim4 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 47.970883][ T1927] netdevsim netdevsim4 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 47.970900][ T1927] netdevsim netdevsim4 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 47.974052][ T4841] veth0_macvtap: entered promiscuous mode [ 47.975894][ T4856] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 47.975907][ T4856] CPU: 1 UID: 0 PID: 4856 Comm: kworker/u9:3 Tainted: G W syzkaller #0 PREEMPT [ 47.975919][ T4856] Tainted: [W]=WARN [ 47.975922][ T4856] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 47.975927][ T4856] Workqueue: hci0 hci_rx_work [ 47.975941][ T4856] Call trace: [ 47.975943][ T4856] show_stack+0x2c/0x3c (C) [ 47.975958][ T4856] __dump_stack+0x30/0x40 [ 47.975969][ T4856] dump_stack_lvl+0xd8/0x12c [ 47.975979][ T4856] dump_stack+0x1c/0x28 [ 47.975989][ T4856] sysfs_warn_dup+0x9c/0xb8 [ 47.975999][ T4856] sysfs_create_dir_ns+0x190/0x1f4 [ 47.976009][ T4856] kobject_add_internal+0x290/0x6f0 [ 47.976018][ T4856] kobject_add_varg+0x9c/0xe8 [ 47.976025][ T4856] kobject_add+0x110/0x1c8 [ 47.976032][ T4856] device_add+0x394/0x9e0 [ 47.976040][ T4856] hci_conn_add_sysfs+0xbc/0x1e8 [ 47.976050][ T4856] le_conn_complete_evt+0xc68/0x10f8 [ 47.976059][ T4856] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 47.976067][ T4856] hci_le_meta_evt+0x2b0/0x46c [ 47.976076][ T4856] hci_event_packet+0x4c0/0x9c8 [ 47.976085][ T4856] hci_rx_work+0x2f4/0xd78 [ 47.976092][ T4856] process_scheduled_works+0x788/0x10b8 [ 47.976101][ T4856] worker_thread+0x798/0xbd0 [ 47.976116][ T4856] kthread+0x304/0x3d4 [ 47.976124][ T4856] ret_from_fork+0x10/0x20 [ 47.976140][ T4856] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 47.976156][ T4856] Bluetooth: hci0: failed to register connection device [ 47.979963][ T4856] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 47.979976][ T4856] CPU: 1 UID: 0 PID: 4856 Comm: kworker/u9:3 Tainted: G W syzkaller #0 PREEMPT [ 47.979990][ T4856] Tainted: [W]=WARN [ 47.979993][ T4856] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 47.979999][ T4856] Workqueue: hci2 hci_rx_work [ 47.980010][ T4856] Call trace: [ 47.980013][ T4856] show_stack+0x2c/0x3c (C) [ 47.980027][ T4856] __dump_stack+0x30/0x40 [ 47.980039][ T4856] dump_stack_lvl+0xd8/0x12c [ 47.980048][ T4856] dump_stack+0x1c/0x28 [ 47.980058][ T4856] sysfs_warn_dup+0x9c/0xb8 [ 47.980069][ T4856] sysfs_create_dir_ns+0x190/0x1f4 [ 47.980079][ T4856] kobject_add_internal+0x290/0x6f0 [ 47.980092][ T4856] kobject_add_varg+0x9c/0xe8 [ 47.980100][ T4856] kobject_add+0x110/0x1c8 [ 47.980113][ T4856] device_add+0x394/0x9e0 [ 47.980121][ T4856] hci_conn_add_sysfs+0xbc/0x1e8 [ 47.980132][ T4856] le_conn_complete_evt+0xc68/0x10f8 [ 47.980141][ T4856] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 47.980149][ T4856] hci_le_meta_evt+0x2b0/0x46c [ 47.980159][ T4856] hci_event_packet+0x4c0/0x9c8 [ 47.980168][ T4856] hci_rx_work+0x2f4/0xd78 [ 47.980175][ T4856] process_scheduled_works+0x788/0x10b8 [ 47.980184][ T4856] worker_thread+0x798/0xbd0 [ 47.980193][ T4856] kthread+0x304/0x3d4 [ 47.980201][ T4856] ret_from_fork+0x10/0x20 [ 47.982976][ T4856] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 47.982996][ T4856] Bluetooth: hci2: failed to register connection device [ 48.018256][ T306] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 48.018268][ T306] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 48.019393][ T4856] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 48.019406][ T4856] CPU: 1 UID: 0 PID: 4856 Comm: kworker/u9:3 Tainted: G W syzkaller #0 PREEMPT [ 48.019418][ T4856] Tainted: [W]=WARN [ 48.019421][ T4856] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.019426][ T4856] Workqueue: hci0 hci_rx_work [ 48.019439][ T4856] Call trace: [ 48.019442][ T4856] show_stack+0x2c/0x3c (C) [ 48.019456][ T4856] __dump_stack+0x30/0x40 [ 48.019467][ T4856] dump_stack_lvl+0xd8/0x12c [ 48.019477][ T4856] dump_stack+0x1c/0x28 [ 48.019486][ T4856] sysfs_warn_dup+0x9c/0xb8 [ 48.019497][ T4856] sysfs_create_dir_ns+0x190/0x1f4 [ 48.019506][ T4856] kobject_add_internal+0x290/0x6f0 [ 48.019515][ T4856] kobject_add_varg+0x9c/0xe8 [ 48.019522][ T4856] kobject_add+0x110/0x1c8 [ 48.019529][ T4856] device_add+0x394/0x9e0 [ 48.019537][ T4856] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.019547][ T4856] le_conn_complete_evt+0xc68/0x10f8 [ 48.019555][ T4856] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.019563][ T4856] hci_le_meta_evt+0x2b0/0x46c [ 48.019573][ T4856] hci_event_packet+0x4c0/0x9c8 [ 48.019581][ T4856] hci_rx_work+0x2f4/0xd78 [ 48.019588][ T4856] process_scheduled_works+0x788/0x10b8 [ 48.019598][ T4856] worker_thread+0x798/0xbd0 [ 48.019606][ T4856] kthread+0x304/0x3d4 [ 48.019614][ T4856] ret_from_fork+0x10/0x20 [ 48.019626][ T4856] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.019637][ T4856] Bluetooth: hci0: failed to register connection device [ 48.020036][ T4856] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 48.020044][ T4856] CPU: 1 UID: 0 PID: 4856 Comm: kworker/u9:3 Tainted: G W syzkaller #0 PREEMPT [ 48.020056][ T4856] Tainted: [W]=WARN [ 48.020059][ T4856] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.020064][ T4856] Workqueue: hci2 hci_rx_work [ 48.020072][ T4856] Call trace: [ 48.020075][ T4856] show_stack+0x2c/0x3c (C) [ 48.020092][ T4856] __dump_stack+0x30/0x40 [ 48.020104][ T4856] dump_stack_lvl+0xd8/0x12c [ 48.020120][ T4856] dump_stack+0x1c/0x28 [ 48.020131][ T4856] sysfs_warn_dup+0x9c/0xb8 [ 48.020142][ T4856] sysfs_create_dir_ns+0x190/0x1f4 [ 48.020152][ T4856] kobject_add_internal+0x290/0x6f0 [ 48.020160][ T4856] kobject_add_varg+0x9c/0xe8 [ 48.020168][ T4856] kobject_add+0x110/0x1c8 [ 48.020175][ T4856] device_add+0x394/0x9e0 [ 48.020183][ T4856] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.020192][ T4856] le_conn_complete_evt+0xc68/0x10f8 [ 48.020201][ T4856] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.020210][ T4856] hci_le_meta_evt+0x2b0/0x46c [ 48.020219][ T4856] hci_event_packet+0x4c0/0x9c8 [ 48.020228][ T4856] hci_rx_work+0x2f4/0xd78 [ 48.020235][ T4856] process_scheduled_works+0x788/0x10b8 [ 48.020244][ T4856] worker_thread+0x798/0xbd0 [ 48.020253][ T4856] kthread+0x304/0x3d4 [ 48.020261][ T4856] ret_from_fork+0x10/0x20 [ 48.021389][ T4856] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.021407][ T4856] Bluetooth: hci2: failed to register connection device [ 48.059448][ T4856] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 48.059466][ T4856] CPU: 1 UID: 0 PID: 4856 Comm: kworker/u9:3 Tainted: G W syzkaller #0 PREEMPT [ 48.059481][ T4856] Tainted: [W]=WARN [ 48.059485][ T4856] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.059491][ T4856] Workqueue: hci0 hci_rx_work [ 48.059506][ T4856] Call trace: [ 48.059509][ T4856] show_stack+0x2c/0x3c (C) [ 48.059524][ T4856] __dump_stack+0x30/0x40 [ 48.059536][ T4856] dump_stack_lvl+0xd8/0x12c [ 48.059546][ T4856] dump_stack+0x1c/0x28 [ 48.059556][ T4856] sysfs_warn_dup+0x9c/0xb8 [ 48.059567][ T4856] sysfs_create_dir_ns+0x190/0x1f4 [ 48.059576][ T4856] kobject_add_internal+0x290/0x6f0 [ 48.059585][ T4856] kobject_add_varg+0x9c/0xe8 [ 48.059592][ T4856] kobject_add+0x110/0x1c8 [ 48.059599][ T4856] device_add+0x394/0x9e0 [ 48.059607][ T4856] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.059617][ T4856] le_conn_complete_evt+0xc68/0x10f8 [ 48.059626][ T4856] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.059634][ T4856] hci_le_meta_evt+0x2b0/0x46c [ 48.059644][ T4856] hci_event_packet+0x4c0/0x9c8 [ 48.059653][ T4856] hci_rx_work+0x2f4/0xd78 [ 48.059659][ T4856] process_scheduled_works+0x788/0x10b8 [ 48.059669][ T4856] worker_thread+0x798/0xbd0 [ 48.059678][ T4856] kthread+0x304/0x3d4 [ 48.059685][ T4856] ret_from_fork+0x10/0x20 [ 48.059698][ T4856] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.059709][ T4856] Bluetooth: hci0: failed to register connection device [ 48.062853][ T4856] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 48.062863][ T4856] CPU: 1 UID: 0 PID: 4856 Comm: kworker/u9:3 Tainted: G W syzkaller #0 PREEMPT [ 48.062876][ T4856] Tainted: [W]=WARN [ 48.062879][ T4856] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.062885][ T4856] Workqueue: hci2 hci_rx_work [ 48.062895][ T4856] Call trace: [ 48.062898][ T4856] show_stack+0x2c/0x3c (C) [ 48.062910][ T4856] __dump_stack+0x30/0x40 [ 48.062920][ T4856] dump_stack_lvl+0xd8/0x12c [ 48.062930][ T4856] dump_stack+0x1c/0x28 [ 48.062940][ T4856] sysfs_warn_dup+0x9c/0xb8 [ 48.062950][ T4856] sysfs_create_dir_ns+0x190/0x1f4 [ 48.062959][ T4856] kobject_add_internal+0x290/0x6f0 [ 48.062968][ T4856] kobject_add_varg+0x9c/0xe8 [ 48.062975][ T4856] kobject_add+0x110/0x1c8 [ 48.062982][ T4856] device_add+0x394/0x9e0 [ 48.062989][ T4856] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.062999][ T4856] le_conn_complete_evt+0xc68/0x10f8 [ 48.063008][ T4856] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.063016][ T4856] hci_le_meta_evt+0x2b0/0x46c [ 48.063025][ T4856] hci_event_packet+0x4c0/0x9c8 [ 48.063034][ T4856] hci_rx_work+0x2f4/0xd78 [ 48.063041][ T4856] process_scheduled_works+0x788/0x10b8 [ 48.063050][ T4856] worker_thread+0x798/0xbd0 [ 48.063058][ T4856] kthread+0x304/0x3d4 [ 48.063066][ T4856] ret_from_fork+0x10/0x20 [ 48.063078][ T4856] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.063089][ T4856] Bluetooth: hci2: failed to register connection device [ 48.068658][ T4841] veth1_macvtap: entered promiscuous mode [ 48.086971][ T4856] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 48.086986][ T4856] CPU: 1 UID: 0 PID: 4856 Comm: kworker/u9:3 Tainted: G W syzkaller #0 PREEMPT [ 48.087003][ T4856] Tainted: [W]=WARN [ 48.087007][ T4856] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.087012][ T4856] Workqueue: hci0 hci_rx_work [ 48.087028][ T4856] Call trace: [ 48.087032][ T4856] show_stack+0x2c/0x3c (C) [ 48.087048][ T4856] __dump_stack+0x30/0x40 [ 48.087060][ T4856] dump_stack_lvl+0xd8/0x12c [ 48.087070][ T4856] dump_stack+0x1c/0x28 [ 48.087080][ T4856] sysfs_warn_dup+0x9c/0xb8 [ 48.087091][ T4856] sysfs_create_dir_ns+0x190/0x1f4 [ 48.087100][ T4856] kobject_add_internal+0x290/0x6f0 [ 48.087115][ T4856] kobject_add_varg+0x9c/0xe8 [ 48.087123][ T4856] kobject_add+0x110/0x1c8 [ 48.087131][ T4856] device_add+0x394/0x9e0 [ 48.087139][ T4856] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.087149][ T4856] le_conn_complete_evt+0xc68/0x10f8 [ 48.087158][ T4856] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.087166][ T4856] hci_le_meta_evt+0x2b0/0x46c [ 48.087175][ T4856] hci_event_packet+0x4c0/0x9c8 [ 48.087184][ T4856] hci_rx_work+0x2f4/0xd78 [ 48.087191][ T4856] process_scheduled_works+0x788/0x10b8 [ 48.087200][ T4856] worker_thread+0x798/0xbd0 [ 48.087209][ T4856] kthread+0x304/0x3d4 [ 48.087217][ T4856] ret_from_fork+0x10/0x20 [ 48.087243][ T4856] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.087258][ T4856] Bluetooth: hci0: failed to register connection device [ 48.108424][ T4856] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 48.108440][ T4856] CPU: 1 UID: 0 PID: 4856 Comm: kworker/u9:3 Tainted: G W syzkaller #0 PREEMPT [ 48.108452][ T4856] Tainted: [W]=WARN [ 48.108455][ T4856] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.108460][ T4856] Workqueue: hci2 hci_rx_work [ 48.108474][ T4856] Call trace: [ 48.108478][ T4856] show_stack+0x2c/0x3c (C) [ 48.108492][ T4856] __dump_stack+0x30/0x40 [ 48.108503][ T4856] dump_stack_lvl+0xd8/0x12c [ 48.108513][ T4856] dump_stack+0x1c/0x28 [ 48.108522][ T4856] sysfs_warn_dup+0x9c/0xb8 [ 48.108532][ T4856] sysfs_create_dir_ns+0x190/0x1f4 [ 48.108542][ T4856] kobject_add_internal+0x290/0x6f0 [ 48.108551][ T4856] kobject_add_varg+0x9c/0xe8 [ 48.108558][ T4856] kobject_add+0x110/0x1c8 [ 48.108565][ T4856] device_add+0x394/0x9e0 [ 48.108573][ T4856] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.108583][ T4856] le_conn_complete_evt+0xc68/0x10f8 [ 48.108591][ T4856] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.108599][ T4856] hci_le_meta_evt+0x2b0/0x46c [ 48.108609][ T4856] hci_event_packet+0x4c0/0x9c8 [ 48.108617][ T4856] hci_rx_work+0x2f4/0xd78 [ 48.108624][ T4856] process_scheduled_works+0x788/0x10b8 [ 48.108634][ T4856] worker_thread+0x798/0xbd0 [ 48.108642][ T4856] kthread+0x304/0x3d4 [ 48.108650][ T4856] ret_from_fork+0x10/0x20 [ 48.108662][ T4856] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.108674][ T4856] Bluetooth: hci2: failed to register connection device [ 48.128464][ T4841] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 48.129445][ T4841] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 48.135956][ T4856] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 48.135970][ T4856] CPU: 1 UID: 0 PID: 4856 Comm: kworker/u9:3 Tainted: G W syzkaller #0 PREEMPT [ 48.135982][ T4856] Tainted: [W]=WARN [ 48.135985][ T4856] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.135990][ T4856] Workqueue: hci0 hci_rx_work [ 48.136004][ T4856] Call trace: [ 48.136007][ T4856] show_stack+0x2c/0x3c (C) [ 48.136022][ T4856] __dump_stack+0x30/0x40 [ 48.136032][ T4856] dump_stack_lvl+0xd8/0x12c [ 48.136042][ T4856] dump_stack+0x1c/0x28 [ 48.136052][ T4856] sysfs_warn_dup+0x9c/0xb8 [ 48.136062][ T4856] sysfs_create_dir_ns+0x190/0x1f4 [ 48.136072][ T4856] kobject_add_internal+0x290/0x6f0 [ 48.136081][ T4856] kobject_add_varg+0x9c/0xe8 [ 48.136088][ T4856] kobject_add+0x110/0x1c8 [ 48.136095][ T4856] device_add+0x394/0x9e0 [ 48.136102][ T4856] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.136118][ T4856] le_conn_complete_evt+0xc68/0x10f8 [ 48.136128][ T4856] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.136137][ T4856] hci_le_meta_evt+0x2b0/0x46c [ 48.136146][ T4856] hci_event_packet+0x4c0/0x9c8 [ 48.136155][ T4856] hci_rx_work+0x2f4/0xd78 [ 48.136162][ T4856] process_scheduled_works+0x788/0x10b8 [ 48.136171][ T4856] worker_thread+0x798/0xbd0 [ 48.136180][ T4856] kthread+0x304/0x3d4 [ 48.136187][ T4856] ret_from_fork+0x10/0x20 [ 48.136200][ T4856] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.136213][ T4856] Bluetooth: hci0: failed to register connection device [ 48.146651][ T4856] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 48.146666][ T4856] CPU: 1 UID: 0 PID: 4856 Comm: kworker/u9:3 Tainted: G W syzkaller #0 PREEMPT [ 48.146679][ T4856] Tainted: [W]=WARN [ 48.146682][ T4856] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.146687][ T4856] Workqueue: hci2 hci_rx_work [ 48.146701][ T4856] Call trace: [ 48.146703][ T4856] show_stack+0x2c/0x3c (C) [ 48.146719][ T4856] __dump_stack+0x30/0x40 [ 48.146730][ T4856] dump_stack_lvl+0xd8/0x12c [ 48.146740][ T4856] dump_stack+0x1c/0x28 [ 48.146749][ T4856] sysfs_warn_dup+0x9c/0xb8 [ 48.146760][ T4856] sysfs_create_dir_ns+0x190/0x1f4 [ 48.146770][ T4856] kobject_add_internal+0x290/0x6f0 [ 48.146779][ T4856] kobject_add_varg+0x9c/0xe8 [ 48.146786][ T4856] kobject_add+0x110/0x1c8 [ 48.146793][ T4856] device_add+0x394/0x9e0 [ 48.146800][ T4856] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.146810][ T4856] le_conn_complete_evt+0xc68/0x10f8 [ 48.146818][ T4856] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.146826][ T4856] hci_le_meta_evt+0x2b0/0x46c [ 48.146836][ T4856] hci_event_packet+0x4c0/0x9c8 [ 48.146844][ T4856] hci_rx_work+0x2f4/0xd78 [ 48.146851][ T4856] process_scheduled_works+0x788/0x10b8 [ 48.146861][ T4856] worker_thread+0x798/0xbd0 [ 48.146870][ T4856] kthread+0x304/0x3d4 [ 48.146877][ T4856] ret_from_fork+0x10/0x20 [ 48.146890][ T4856] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.146903][ T4856] Bluetooth: hci2: failed to register connection device [ 48.165373][ T4856] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 48.165389][ T4856] CPU: 1 UID: 0 PID: 4856 Comm: kworker/u9:3 Tainted: G W syzkaller #0 PREEMPT [ 48.165402][ T4856] Tainted: [W]=WARN [ 48.165405][ T4856] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.165410][ T4856] Workqueue: hci0 hci_rx_work [ 48.165425][ T4856] Call trace: [ 48.165428][ T4856] show_stack+0x2c/0x3c (C) [ 48.165443][ T4856] __dump_stack+0x30/0x40 [ 48.165454][ T4856] dump_stack_lvl+0xd8/0x12c [ 48.165464][ T4856] dump_stack+0x1c/0x28 [ 48.165474][ T4856] sysfs_warn_dup+0x9c/0xb8 [ 48.165485][ T4856] sysfs_create_dir_ns+0x190/0x1f4 [ 48.165495][ T4856] kobject_add_internal+0x290/0x6f0 [ 48.165504][ T4856] kobject_add_varg+0x9c/0xe8 [ 48.165511][ T4856] kobject_add+0x110/0x1c8 [ 48.165518][ T4856] device_add+0x394/0x9e0 [ 48.165526][ T4856] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.165536][ T4856] le_conn_complete_evt+0xc68/0x10f8 [ 48.165544][ T4856] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.165553][ T4856] hci_le_meta_evt+0x2b0/0x46c [ 48.165562][ T4856] hci_event_packet+0x4c0/0x9c8 [ 48.165571][ T4856] hci_rx_work+0x2f4/0xd78 [ 48.165577][ T4856] process_scheduled_works+0x788/0x10b8 [ 48.165587][ T4856] worker_thread+0x798/0xbd0 [ 48.165596][ T4856] kthread+0x304/0x3d4 [ 48.165603][ T4856] ret_from_fork+0x10/0x20 [ 48.165616][ T4856] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.165628][ T4856] Bluetooth: hci0: failed to register connection device [ 48.180495][ T1914] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 48.180508][ T1914] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 48.184216][ T4856] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 48.184231][ T4856] CPU: 1 UID: 0 PID: 4856 Comm: kworker/u9:3 Tainted: G W syzkaller #0 PREEMPT [ 48.184243][ T4856] Tainted: [W]=WARN [ 48.184247][ T4856] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.184252][ T4856] Workqueue: hci2 hci_rx_work [ 48.184266][ T4856] Call trace: [ 48.184269][ T4856] show_stack+0x2c/0x3c (C) [ 48.184284][ T4856] __dump_stack+0x30/0x40 [ 48.184295][ T4856] dump_stack_lvl+0xd8/0x12c [ 48.184304][ T4856] dump_stack+0x1c/0x28 [ 48.184314][ T4856] sysfs_warn_dup+0x9c/0xb8 [ 48.184324][ T4856] sysfs_create_dir_ns+0x190/0x1f4 [ 48.184334][ T4856] kobject_add_internal+0x290/0x6f0 [ 48.184343][ T4856] kobject_add_varg+0x9c/0xe8 [ 48.184350][ T4856] kobject_add+0x110/0x1c8 [ 48.184357][ T4856] device_add+0x394/0x9e0 [ 48.184365][ T4856] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.184374][ T4856] le_conn_complete_evt+0xc68/0x10f8 [ 48.184383][ T4856] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.184391][ T4856] hci_le_meta_evt+0x2b0/0x46c [ 48.184401][ T4856] hci_event_packet+0x4c0/0x9c8 [ 48.184409][ T4856] hci_rx_work+0x2f4/0xd78 [ 48.184416][ T4856] process_scheduled_works+0x788/0x10b8 [ 48.184426][ T4856] worker_thread+0x798/0xbd0 [ 48.184434][ T4856] kthread+0x304/0x3d4 [ 48.184442][ T4856] ret_from_fork+0x10/0x20 [ 48.184454][ T4856] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.184465][ T4856] Bluetooth: hci2: failed to register connection device [ 48.184544][ T306] netdevsim netdevsim1 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 48.184570][ T306] netdevsim netdevsim1 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 48.184587][ T306] netdevsim netdevsim1 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 48.184603][ T306] netdevsim netdevsim1 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 48.213618][ T4856] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 48.213637][ T4856] CPU: 1 UID: 0 PID: 4856 Comm: kworker/u9:3 Tainted: G W syzkaller #0 PREEMPT [ 48.213649][ T4856] Tainted: [W]=WARN [ 48.213653][ T4856] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.213658][ T4856] Workqueue: hci0 hci_rx_work [ 48.213671][ T4856] Call trace: [ 48.213674][ T4856] show_stack+0x2c/0x3c (C) [ 48.213689][ T4856] __dump_stack+0x30/0x40 [ 48.213699][ T4856] dump_stack_lvl+0xd8/0x12c [ 48.213709][ T4856] dump_stack+0x1c/0x28 [ 48.213719][ T4856] sysfs_warn_dup+0x9c/0xb8 [ 48.213729][ T4856] sysfs_create_dir_ns+0x190/0x1f4 [ 48.213739][ T4856] kobject_add_internal+0x290/0x6f0 [ 48.213748][ T4856] kobject_add_varg+0x9c/0xe8 [ 48.213755][ T4856] kobject_add+0x110/0x1c8 [ 48.213762][ T4856] device_add+0x394/0x9e0 [ 48.213770][ T4856] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.213779][ T4856] le_conn_complete_evt+0xc68/0x10f8 [ 48.213788][ T4856] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.213796][ T4856] hci_le_meta_evt+0x2b0/0x46c [ 48.213806][ T4856] hci_event_packet+0x4c0/0x9c8 [ 48.213814][ T4856] hci_rx_work+0x2f4/0xd78 [ 48.213821][ T4856] process_scheduled_works+0x788/0x10b8 [ 48.213830][ T4856] worker_thread+0x798/0xbd0 [ 48.213839][ T4856] kthread+0x304/0x3d4 [ 48.213847][ T4856] ret_from_fork+0x10/0x20 [ 48.213860][ T4856] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.213871][ T4856] Bluetooth: hci0: failed to register connection device [ 48.238318][ T4856] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 48.238335][ T4856] CPU: 1 UID: 0 PID: 4856 Comm: kworker/u9:3 Tainted: G W syzkaller #0 PREEMPT [ 48.238347][ T4856] Tainted: [W]=WARN [ 48.238350][ T4856] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.238355][ T4856] Workqueue: hci2 hci_rx_work [ 48.238370][ T4856] Call trace: [ 48.238373][ T4856] show_stack+0x2c/0x3c (C) [ 48.238388][ T4856] __dump_stack+0x30/0x40 [ 48.238399][ T4856] dump_stack_lvl+0xd8/0x12c [ 48.238409][ T4856] dump_stack+0x1c/0x28 [ 48.238418][ T4856] sysfs_warn_dup+0x9c/0xb8 [ 48.238429][ T4856] sysfs_create_dir_ns+0x190/0x1f4 [ 48.238439][ T4856] kobject_add_internal+0x290/0x6f0 [ 48.238449][ T4856] kobject_add_varg+0x9c/0xe8 [ 48.238456][ T4856] kobject_add+0x110/0x1c8 [ 48.238463][ T4856] device_add+0x394/0x9e0 [ 48.238471][ T4856] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.238480][ T4856] le_conn_complete_evt+0xc68/0x10f8 [ 48.238489][ T4856] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.238497][ T4856] hci_le_meta_evt+0x2b0/0x46c [ 48.238506][ T4856] hci_event_packet+0x4c0/0x9c8 [ 48.238515][ T4856] hci_rx_work+0x2f4/0xd78 [ 48.238522][ T4856] process_scheduled_works+0x788/0x10b8 [ 48.238531][ T4856] worker_thread+0x798/0xbd0 [ 48.238540][ T4856] kthread+0x304/0x3d4 [ 48.238547][ T4856] ret_from_fork+0x10/0x20 [ 48.238560][ T4856] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.238571][ T4856] Bluetooth: hci2: failed to register connection device [ 48.274134][ T4856] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 48.274152][ T4856] CPU: 1 UID: 0 PID: 4856 Comm: kworker/u9:3 Tainted: G W syzkaller #0 PREEMPT [ 48.274168][ T4856] Tainted: [W]=WARN [ 48.274173][ T4856] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.274178][ T4856] Workqueue: hci2 hci_rx_work [ 48.274194][ T4856] Call trace: [ 48.274198][ T4856] show_stack+0x2c/0x3c (C) [ 48.274214][ T4856] __dump_stack+0x30/0x40 [ 48.274225][ T4856] dump_stack_lvl+0xd8/0x12c [ 48.274235][ T4856] dump_stack+0x1c/0x28 [ 48.274245][ T4856] sysfs_warn_dup+0x9c/0xb8 [ 48.274256][ T4856] sysfs_create_dir_ns+0x190/0x1f4 [ 48.274266][ T4856] kobject_add_internal+0x290/0x6f0 [ 48.274275][ T4856] kobject_add_varg+0x9c/0xe8 [ 48.274282][ T4856] kobject_add+0x110/0x1c8 [ 48.274289][ T4856] device_add+0x394/0x9e0 [ 48.274297][ T4856] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.274307][ T4856] le_conn_complete_evt+0xc68/0x10f8 [ 48.274315][ T4856] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.274324][ T4856] hci_le_meta_evt+0x2b0/0x46c [ 48.274333][ T4856] hci_event_packet+0x4c0/0x9c8 [ 48.274342][ T4856] hci_rx_work+0x2f4/0xd78 [ 48.274349][ T4856] process_scheduled_works+0x788/0x10b8 [ 48.274359][ T4856] worker_thread+0x798/0xbd0 [ 48.274367][ T4856] kthread+0x304/0x3d4 [ 48.274375][ T4856] ret_from_fork+0x10/0x20 [ 48.274387][ T4856] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.274399][ T4856] Bluetooth: hci2: failed to register connection device [ 48.281620][ T4856] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 48.281632][ T4856] CPU: 1 UID: 0 PID: 4856 Comm: kworker/u9:3 Tainted: G W syzkaller #0 PREEMPT [ 48.281644][ T4856] Tainted: [W]=WARN [ 48.281647][ T4856] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.281652][ T4856] Workqueue: hci0 hci_rx_work [ 48.281663][ T4856] Call trace: [ 48.281666][ T4856] show_stack+0x2c/0x3c (C) [ 48.281680][ T4856] __dump_stack+0x30/0x40 [ 48.281691][ T4856] dump_stack_lvl+0xd8/0x12c [ 48.281701][ T4856] dump_stack+0x1c/0x28 [ 48.281710][ T4856] sysfs_warn_dup+0x9c/0xb8 [ 48.281721][ T4856] sysfs_create_dir_ns+0x190/0x1f4 [ 48.281731][ T4856] kobject_add_internal+0x290/0x6f0 [ 48.281739][ T4856] kobject_add_varg+0x9c/0xe8 [ 48.281746][ T4856] kobject_add+0x110/0x1c8 [ 48.281753][ T4856] device_add+0x394/0x9e0 [ 48.281761][ T4856] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.281770][ T4856] le_conn_complete_evt+0xc68/0x10f8 [ 48.281779][ T4856] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.281787][ T4856] hci_le_meta_evt+0x2b0/0x46c [ 48.281797][ T4856] hci_event_packet+0x4c0/0x9c8 [ 48.281805][ T4856] hci_rx_work+0x2f4/0xd78 [ 48.281812][ T4856] process_scheduled_works+0x788/0x10b8 [ 48.281821][ T4856] worker_thread+0x798/0xbd0 [ 48.281830][ T4856] kthread+0x304/0x3d4 [ 48.281838][ T4856] ret_from_fork+0x10/0x20 [ 48.281850][ T4856] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.281861][ T4856] Bluetooth: hci0: failed to register connection device [ 48.297497][ T4856] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:0' [ 48.297511][ T4856] CPU: 1 UID: 0 PID: 4856 Comm: kworker/u9:3 Tainted: G W syzkaller #0 PREEMPT [ 48.297524][ T4856] Tainted: [W]=WARN [ 48.297527][ T4856] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.297532][ T4856] Workqueue: hci3 hci_rx_work [ 48.297546][ T4856] Call trace: [ 48.297549][ T4856] show_stack+0x2c/0x3c (C) [ 48.297564][ T4856] __dump_stack+0x30/0x40 [ 48.297577][ T4856] dump_stack_lvl+0xd8/0x12c [ 48.297587][ T4856] dump_stack+0x1c/0x28 [ 48.297597][ T4856] sysfs_warn_dup+0x9c/0xb8 [ 48.297609][ T4856] sysfs_create_dir_ns+0x190/0x1f4 [ 48.297619][ T4856] kobject_add_internal+0x290/0x6f0 [ 48.297629][ T4856] kobject_add_varg+0x9c/0xe8 [ 48.297636][ T4856] kobject_add+0x110/0x1c8 [ 48.297643][ T4856] device_add+0x394/0x9e0 [ 48.297652][ T4856] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.297663][ T4856] le_conn_complete_evt+0xc68/0x10f8 [ 48.297673][ T4856] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.297682][ T4856] hci_le_meta_evt+0x2b0/0x46c [ 48.297693][ T4856] hci_event_packet+0x4c0/0x9c8 [ 48.297702][ T4856] hci_rx_work+0x2f4/0xd78 [ 48.297709][ T4856] process_scheduled_works+0x788/0x10b8 [ 48.297719][ T4856] worker_thread+0x798/0xbd0 [ 48.297727][ T4856] kthread+0x304/0x3d4 [ 48.297736][ T4856] ret_from_fork+0x10/0x20 [ 48.297748][ T4856] kobject: kobject_add_internal failed for hci3:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.297760][ T4856] Bluetooth: hci3: failed to register connection device [ 48.305818][ T306] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 48.305829][ T306] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 48.319864][ T4856] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 48.319879][ T4856] CPU: 1 UID: 0 PID: 4856 Comm: kworker/u9:3 Tainted: G W syzkaller #0 PREEMPT [ 48.319891][ T4856] Tainted: [W]=WARN [ 48.319895][ T4856] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.319900][ T4856] Workqueue: hci0 hci_rx_work [ 48.319913][ T4856] Call trace: [ 48.319916][ T4856] show_stack+0x2c/0x3c (C) [ 48.319931][ T4856] __dump_stack+0x30/0x40 [ 48.319942][ T4856] dump_stack_lvl+0xd8/0x12c [ 48.319952][ T4856] dump_stack+0x1c/0x28 [ 48.319961][ T4856] sysfs_warn_dup+0x9c/0xb8 [ 48.319972][ T4856] sysfs_create_dir_ns+0x190/0x1f4 [ 48.319982][ T4856] kobject_add_internal+0x290/0x6f0 [ 48.319991][ T4856] kobject_add_varg+0x9c/0xe8 [ 48.319998][ T4856] kobject_add+0x110/0x1c8 [ 48.320005][ T4856] device_add+0x394/0x9e0 [ 48.320013][ T4856] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.320023][ T4856] le_conn_complete_evt+0xc68/0x10f8 [ 48.320031][ T4856] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.320040][ T4856] hci_le_meta_evt+0x2b0/0x46c [ 48.320050][ T4856] hci_event_packet+0x4c0/0x9c8 [ 48.320058][ T4856] hci_rx_work+0x2f4/0xd78 [ 48.320065][ T4856] process_scheduled_works+0x788/0x10b8 [ 48.320074][ T4856] worker_thread+0x798/0xbd0 [ 48.320089][ T4856] kthread+0x304/0x3d4 [ 48.320097][ T4856] ret_from_fork+0x10/0x20 [ 48.320165][ T4856] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.320177][ T4856] Bluetooth: hci0: failed to register connection device [ 48.341566][ T4856] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 48.341585][ T4856] CPU: 1 UID: 0 PID: 4856 Comm: kworker/u9:3 Tainted: G W syzkaller #0 PREEMPT [ 48.341598][ T4856] Tainted: [W]=WARN [ 48.341602][ T4856] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.341607][ T4856] Workqueue: hci2 hci_rx_work [ 48.341621][ T4856] Call trace: [ 48.341624][ T4856] show_stack+0x2c/0x3c (C) [ 48.341639][ T4856] __dump_stack+0x30/0x40 [ 48.341650][ T4856] dump_stack_lvl+0xd8/0x12c [ 48.341660][ T4856] dump_stack+0x1c/0x28 [ 48.341669][ T4856] sysfs_warn_dup+0x9c/0xb8 [ 48.341680][ T4856] sysfs_create_dir_ns+0x190/0x1f4 [ 48.341689][ T4856] kobject_add_internal+0x290/0x6f0 [ 48.341698][ T4856] kobject_add_varg+0x9c/0xe8 [ 48.341705][ T4856] kobject_add+0x110/0x1c8 [ 48.341712][ T4856] device_add+0x394/0x9e0 [ 48.341720][ T4856] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.341730][ T4856] le_conn_complete_evt+0xc68/0x10f8 [ 48.341739][ T4856] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.341747][ T4856] hci_le_meta_evt+0x2b0/0x46c [ 48.341756][ T4856] hci_event_packet+0x4c0/0x9c8 [ 48.341764][ T4856] hci_rx_work+0x2f4/0xd78 [ 48.341771][ T4856] process_scheduled_works+0x788/0x10b8 [ 48.341781][ T4856] worker_thread+0x798/0xbd0 [ 48.341789][ T4856] kthread+0x304/0x3d4 [ 48.341797][ T4856] ret_from_fork+0x10/0x20 [ 48.341809][ T4856] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.341821][ T4856] Bluetooth: hci2: failed to register connection device [ 48.344156][ T4856] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:0' [ 48.344170][ T4856] CPU: 1 UID: 0 PID: 4856 Comm: kworker/u9:3 Tainted: G W syzkaller #0 PREEMPT [ 48.344182][ T4856] Tainted: [W]=WARN [ 48.344186][ T4856] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.344191][ T4856] Workqueue: hci3 hci_rx_work [ 48.344202][ T4856] Call trace: [ 48.344204][ T4856] show_stack+0x2c/0x3c (C) [ 48.344217][ T4856] __dump_stack+0x30/0x40 [ 48.344227][ T4856] dump_stack_lvl+0xd8/0x12c [ 48.344237][ T4856] dump_stack+0x1c/0x28 [ 48.344246][ T4856] sysfs_warn_dup+0x9c/0xb8 [ 48.344257][ T4856] sysfs_create_dir_ns+0x190/0x1f4 [ 48.344267][ T4856] kobject_add_internal+0x290/0x6f0 [ 48.344275][ T4856] kobject_add_varg+0x9c/0xe8 [ 48.344282][ T4856] kobject_add+0x110/0x1c8 [ 48.344289][ T4856] device_add+0x394/0x9e0 [ 48.344296][ T4856] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.344306][ T4856] le_conn_complete_evt+0xc68/0x10f8 [ 48.344314][ T4856] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.344322][ T4856] hci_le_meta_evt+0x2b0/0x46c [ 48.344332][ T4856] hci_event_packet+0x4c0/0x9c8 [ 48.344340][ T4856] hci_rx_work+0x2f4/0xd78 [ 48.344347][ T4856] process_scheduled_works+0x788/0x10b8 [ 48.344356][ T4856] worker_thread+0x798/0xbd0 [ 48.344364][ T4856] kthread+0x304/0x3d4 [ 48.344372][ T4856] ret_from_fork+0x10/0x20 [ 48.344384][ T4856] kobject: kobject_add_internal failed for hci3:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.344394][ T4856] Bluetooth: hci3: failed to register connection device [ 48.380310][ T4856] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 48.380323][ T4856] CPU: 1 UID: 0 PID: 4856 Comm: kworker/u9:3 Tainted: G W syzkaller #0 PREEMPT [ 48.380336][ T4856] Tainted: [W]=WARN [ 48.380339][ T4856] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.380344][ T4856] Workqueue: hci2 hci_rx_work [ 48.380358][ T4856] Call trace: [ 48.380361][ T4856] show_stack+0x2c/0x3c (C) [ 48.380377][ T4856] __dump_stack+0x30/0x40 [ 48.380387][ T4856] dump_stack_lvl+0xd8/0x12c [ 48.380397][ T4856] dump_stack+0x1c/0x28 [ 48.380407][ T4856] sysfs_warn_dup+0x9c/0xb8 [ 48.380418][ T4856] sysfs_create_dir_ns+0x190/0x1f4 [ 48.380427][ T4856] kobject_add_internal+0x290/0x6f0 [ 48.380437][ T4856] kobject_add_varg+0x9c/0xe8 [ 48.380444][ T4856] kobject_add+0x110/0x1c8 [ 48.380451][ T4856] device_add+0x394/0x9e0 [ 48.380459][ T4856] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.380469][ T4856] le_conn_complete_evt+0xc68/0x10f8 [ 48.380477][ T4856] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.380485][ T4856] hci_le_meta_evt+0x2b0/0x46c [ 48.380494][ T4856] hci_event_packet+0x4c0/0x9c8 [ 48.380503][ T4856] hci_rx_work+0x2f4/0xd78 [ 48.380510][ T4856] process_scheduled_works+0x788/0x10b8 [ 48.380519][ T4856] worker_thread+0x798/0xbd0 [ 48.380528][ T4856] kthread+0x304/0x3d4 [ 48.380536][ T4856] ret_from_fork+0x10/0x20 [ 48.380549][ T4856] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.380561][ T4856] Bluetooth: hci2: failed to register connection device [ 48.382839][ T4856] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 48.382849][ T4856] CPU: 1 UID: 0 PID: 4856 Comm: kworker/u9:3 Tainted: G W syzkaller #0 PREEMPT [ 48.382861][ T4856] Tainted: [W]=WARN [ 48.382864][ T4856] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.382869][ T4856] Workqueue: hci0 hci_rx_work [ 48.382879][ T4856] Call trace: [ 48.382882][ T4856] show_stack+0x2c/0x3c (C) [ 48.382894][ T4856] __dump_stack+0x30/0x40 [ 48.382905][ T4856] dump_stack_lvl+0xd8/0x12c [ 48.382915][ T4856] dump_stack+0x1c/0x28 [ 48.382925][ T4856] sysfs_warn_dup+0x9c/0xb8 [ 48.382935][ T4856] sysfs_create_dir_ns+0x190/0x1f4 [ 48.382945][ T4856] kobject_add_internal+0x290/0x6f0 [ 48.382953][ T4856] kobject_add_varg+0x9c/0xe8 [ 48.382960][ T4856] kobject_add+0x110/0x1c8 [ 48.382967][ T4856] device_add+0x394/0x9e0 [ 48.382974][ T4856] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.382983][ T4856] le_conn_complete_evt+0xc68/0x10f8 [ 48.382993][ T4856] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.383001][ T4856] hci_le_meta_evt+0x2b0/0x46c [ 48.383011][ T4856] hci_event_packet+0x4c0/0x9c8 [ 48.383019][ T4856] hci_rx_work+0x2f4/0xd78 [ 48.383026][ T4856] process_scheduled_works+0x788/0x10b8 [ 48.383035][ T4856] worker_thread+0x798/0xbd0 [ 48.383043][ T4856] kthread+0x304/0x3d4 [ 48.383051][ T4856] ret_from_fork+0x10/0x20 [ 48.383063][ T4856] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.383074][ T4856] Bluetooth: hci0: failed to register connection device [ 48.389279][ T4856] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:0' [ 48.389291][ T4856] CPU: 1 UID: 0 PID: 4856 Comm: kworker/u9:3 Tainted: G W syzkaller #0 PREEMPT [ 48.389302][ T4856] Tainted: [W]=WARN [ 48.389305][ T4856] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.389310][ T4856] Workqueue: hci3 hci_rx_work [ 48.389321][ T4856] Call trace: [ 48.389323][ T4856] show_stack+0x2c/0x3c (C) [ 48.389336][ T4856] __dump_stack+0x30/0x40 [ 48.389347][ T4856] dump_stack_lvl+0xd8/0x12c [ 48.389357][ T4856] dump_stack+0x1c/0x28 [ 48.389366][ T4856] sysfs_warn_dup+0x9c/0xb8 [ 48.389377][ T4856] sysfs_create_dir_ns+0x190/0x1f4 [ 48.389386][ T4856] kobject_add_internal+0x290/0x6f0 [ 48.389394][ T4856] kobject_add_varg+0x9c/0xe8 [ 48.389401][ T4856] kobject_add+0x110/0x1c8 [ 48.389408][ T4856] device_add+0x394/0x9e0 [ 48.389416][ T4856] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.389425][ T4856] le_conn_complete_evt+0xc68/0x10f8 [ 48.389434][ T4856] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.389442][ T4856] hci_le_meta_evt+0x2b0/0x46c [ 48.389452][ T4856] hci_event_packet+0x4c0/0x9c8 [ 48.389461][ T4856] hci_rx_work+0x2f4/0xd78 [ 48.389467][ T4856] process_scheduled_works+0x788/0x10b8 [ 48.389476][ T4856] worker_thread+0x798/0xbd0 [ 48.389485][ T4856] kthread+0x304/0x3d4 [ 48.389493][ T4856] ret_from_fork+0x10/0x20 [ 48.389505][ T4856] kobject: kobject_add_internal failed for hci3:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.389516][ T4856] Bluetooth: hci3: failed to register connection device [ 48.417953][ T4856] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 48.417970][ T4856] CPU: 1 UID: 0 PID: 4856 Comm: kworker/u9:3 Tainted: G W syzkaller #0 PREEMPT [ 48.417989][ T4856] Tainted: [W]=WARN [ 48.417993][ T4856] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.417999][ T4856] Workqueue: hci0 hci_rx_work [ 48.418016][ T4856] Call trace: [ 48.418020][ T4856] show_stack+0x2c/0x3c (C) [ 48.418036][ T4856] __dump_stack+0x30/0x40 [ 48.418048][ T4856] dump_stack_lvl+0xd8/0x12c [ 48.418058][ T4856] dump_stack+0x1c/0x28 [ 48.418068][ T4856] sysfs_warn_dup+0x9c/0xb8 [ 48.418079][ T4856] sysfs_create_dir_ns+0x190/0x1f4 [ 48.418088][ T4856] kobject_add_internal+0x290/0x6f0 [ 48.418098][ T4856] kobject_add_varg+0x9c/0xe8 [ 48.418105][ T4856] kobject_add+0x110/0x1c8 [ 48.418120][ T4856] device_add+0x394/0x9e0 [ 48.418130][ T4856] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.418141][ T4856] le_conn_complete_evt+0xc68/0x10f8 [ 48.418150][ T4856] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.418158][ T4856] hci_le_meta_evt+0x2b0/0x46c [ 48.418168][ T4856] hci_event_packet+0x4c0/0x9c8 [ 48.418176][ T4856] hci_rx_work+0x2f4/0xd78 [ 48.418183][ T4856] process_scheduled_works+0x788/0x10b8 [ 48.418193][ T4856] worker_thread+0x798/0xbd0 [ 48.418202][ T4856] kthread+0x304/0x3d4 [ 48.418209][ T4856] ret_from_fork+0x10/0x20 [ 48.418236][ T4856] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.418250][ T4856] Bluetooth: hci0: failed to register connection device [ 48.425297][ T4856] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 48.425309][ T4856] CPU: 1 UID: 0 PID: 4856 Comm: kworker/u9:3 Tainted: G W syzkaller #0 PREEMPT [ 48.425320][ T4856] Tainted: [W]=WARN [ 48.425324][ T4856] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.425329][ T4856] Workqueue: hci2 hci_rx_work [ 48.425339][ T4856] Call trace: [ 48.425342][ T4856] show_stack+0x2c/0x3c (C) [ 48.425355][ T4856] __dump_stack+0x30/0x40 [ 48.425365][ T4856] dump_stack_lvl+0xd8/0x12c [ 48.425375][ T4856] dump_stack+0x1c/0x28 [ 48.425384][ T4856] sysfs_warn_dup+0x9c/0xb8 [ 48.425394][ T4856] sysfs_create_dir_ns+0x190/0x1f4 [ 48.425404][ T4856] kobject_add_internal+0x290/0x6f0 [ 48.425412][ T4856] kobject_add_varg+0x9c/0xe8 [ 48.425419][ T4856] kobject_add+0x110/0x1c8 [ 48.425426][ T4856] device_add+0x394/0x9e0 [ 48.425433][ T4856] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.425443][ T4856] le_conn_complete_evt+0xc68/0x10f8 [ 48.425451][ T4856] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.425459][ T4856] hci_le_meta_evt+0x2b0/0x46c [ 48.425468][ T4856] hci_event_packet+0x4c0/0x9c8 [ 48.425477][ T4856] hci_rx_work+0x2f4/0xd78 [ 48.425484][ T4856] process_scheduled_works+0x788/0x10b8 [ 48.425493][ T4856] worker_thread+0x798/0xbd0 [ 48.425502][ T4856] kthread+0x304/0x3d4 [ 48.425509][ T4856] ret_from_fork+0x10/0x20 [ 48.425522][ T4856] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.425533][ T4856] Bluetooth: hci2: failed to register connection device [ 48.427007][ T4856] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:0' [ 48.427017][ T4856] CPU: 1 UID: 0 PID: 4856 Comm: kworker/u9:3 Tainted: G W syzkaller #0 PREEMPT [ 48.427029][ T4856] Tainted: [W]=WARN [ 48.427032][ T4856] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.427037][ T4856] Workqueue: hci3 hci_rx_work [ 48.427046][ T4856] Call trace: [ 48.427049][ T4856] show_stack+0x2c/0x3c (C) [ 48.427061][ T4856] __dump_stack+0x30/0x40 [ 48.427071][ T4856] dump_stack_lvl+0xd8/0x12c [ 48.427081][ T4856] dump_stack+0x1c/0x28 [ 48.427090][ T4856] sysfs_warn_dup+0x9c/0xb8 [ 48.427100][ T4856] sysfs_create_dir_ns+0x190/0x1f4 [ 48.427116][ T4856] kobject_add_internal+0x290/0x6f0 [ 48.427125][ T4856] kobject_add_varg+0x9c/0xe8 [ 48.427132][ T4856] kobject_add+0x110/0x1c8 [ 48.427139][ T4856] device_add+0x394/0x9e0 [ 48.427147][ T4856] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.427157][ T4856] le_conn_complete_evt+0xc68/0x10f8 [ 48.427166][ T4856] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.427174][ T4856] hci_le_meta_evt+0x2b0/0x46c [ 48.427183][ T4856] hci_event_packet+0x4c0/0x9c8 [ 48.427192][ T4856] hci_rx_work+0x2f4/0xd78 [ 48.427199][ T4856] process_scheduled_works+0x788/0x10b8 [ 48.427208][ T4856] worker_thread+0x798/0xbd0 [ 48.427217][ T4856] kthread+0x304/0x3d4 [ 48.427225][ T4856] ret_from_fork+0x10/0x20 [ 48.427237][ T4856] kobject: kobject_add_internal failed for hci3:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.427247][ T4856] Bluetooth: hci3: failed to register connection device [ 48.429848][ T39] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 48.429858][ T39] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 48.476384][ T4856] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 48.476401][ T4856] CPU: 1 UID: 0 PID: 4856 Comm: kworker/u9:3 Tainted: G W syzkaller #0 PREEMPT [ 48.476413][ T4856] Tainted: [W]=WARN [ 48.476417][ T4856] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.476422][ T4856] Workqueue: hci0 hci_rx_work [ 48.476436][ T4856] Call trace: [ 48.476439][ T4856] show_stack+0x2c/0x3c (C) [ 48.476454][ T4856] __dump_stack+0x30/0x40 [ 48.476465][ T4856] dump_stack_lvl+0xd8/0x12c [ 48.476475][ T4856] dump_stack+0x1c/0x28 [ 48.476484][ T4856] sysfs_warn_dup+0x9c/0xb8 [ 48.476495][ T4856] sysfs_create_dir_ns+0x190/0x1f4 [ 48.476505][ T4856] kobject_add_internal+0x290/0x6f0 [ 48.476514][ T4856] kobject_add_varg+0x9c/0xe8 [ 48.476522][ T4856] kobject_add+0x110/0x1c8 [ 48.476529][ T4856] device_add+0x394/0x9e0 [ 48.476536][ T4856] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.476546][ T4856] le_conn_complete_evt+0xc68/0x10f8 [ 48.476555][ T4856] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.476563][ T4856] hci_le_meta_evt+0x2b0/0x46c [ 48.476573][ T4856] hci_event_packet+0x4c0/0x9c8 [ 48.476582][ T4856] hci_rx_work+0x2f4/0xd78 [ 48.476588][ T4856] process_scheduled_works+0x788/0x10b8 [ 48.476598][ T4856] worker_thread+0x798/0xbd0 [ 48.476607][ T4856] kthread+0x304/0x3d4 [ 48.476614][ T4856] ret_from_fork+0x10/0x20 [ 48.476627][ T4856] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.476639][ T4856] Bluetooth: hci0: failed to register connection device [ 48.477351][ T4856] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:0' [ 48.477363][ T4856] CPU: 1 UID: 0 PID: 4856 Comm: kworker/u9:3 Tainted: G W syzkaller #0 PREEMPT [ 48.477376][ T4856] Tainted: [W]=WARN [ 48.477379][ T4856] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.477384][ T4856] Workqueue: hci3 hci_rx_work [ 48.477393][ T4856] Call trace: [ 48.477396][ T4856] show_stack+0x2c/0x3c (C) [ 48.477409][ T4856] __dump_stack+0x30/0x40 [ 48.477422][ T4856] dump_stack_lvl+0xd8/0x12c [ 48.477431][ T4856] dump_stack+0x1c/0x28 [ 48.477441][ T4856] sysfs_warn_dup+0x9c/0xb8 [ 48.477452][ T4856] sysfs_create_dir_ns+0x190/0x1f4 [ 48.477461][ T4856] kobject_add_internal+0x290/0x6f0 [ 48.477470][ T4856] kobject_add_varg+0x9c/0xe8 [ 48.477478][ T4856] kobject_add+0x110/0x1c8 [ 48.477485][ T4856] device_add+0x394/0x9e0 [ 48.477492][ T4856] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.477503][ T4856] le_conn_complete_evt+0xc68/0x10f8 [ 48.477513][ T4856] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.477522][ T4856] hci_le_meta_evt+0x2b0/0x46c [ 48.477532][ T4856] hci_event_packet+0x4c0/0x9c8 [ 48.477541][ T4856] hci_rx_work+0x2f4/0xd78 [ 48.477548][ T4856] process_scheduled_works+0x788/0x10b8 [ 48.477557][ T4856] worker_thread+0x798/0xbd0 [ 48.477566][ T4856] kthread+0x304/0x3d4 [ 48.477574][ T4856] ret_from_fork+0x10/0x20 [ 48.477586][ T4856] kobject: kobject_add_internal failed for hci3:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.477597][ T4856] Bluetooth: hci3: failed to register connection device [ 48.486064][ T4856] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 48.486076][ T4856] CPU: 1 UID: 0 PID: 4856 Comm: kworker/u9:3 Tainted: G W syzkaller #0 PREEMPT [ 48.486088][ T4856] Tainted: [W]=WARN [ 48.486091][ T4856] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.486096][ T4856] Workqueue: hci2 hci_rx_work [ 48.486106][ T4856] Call trace: [ 48.486113][ T4856] show_stack+0x2c/0x3c (C) [ 48.486127][ T4856] __dump_stack+0x30/0x40 [ 48.486138][ T4856] dump_stack_lvl+0xd8/0x12c [ 48.486148][ T4856] dump_stack+0x1c/0x28 [ 48.486158][ T4856] sysfs_warn_dup+0x9c/0xb8 [ 48.486168][ T4856] sysfs_create_dir_ns+0x190/0x1f4 [ 48.486177][ T4856] kobject_add_internal+0x290/0x6f0 [ 48.486186][ T4856] kobject_add_varg+0x9c/0xe8 [ 48.486193][ T4856] kobject_add+0x110/0x1c8 [ 48.486200][ T4856] device_add+0x394/0x9e0 [ 48.486208][ T4856] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.486217][ T4856] le_conn_complete_evt+0xc68/0x10f8 [ 48.486225][ T4856] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.486234][ T4856] hci_le_meta_evt+0x2b0/0x46c [ 48.486243][ T4856] hci_event_packet+0x4c0/0x9c8 [ 48.486252][ T4856] hci_rx_work+0x2f4/0xd78 [ 48.486259][ T4856] process_scheduled_works+0x788/0x10b8 [ 48.486268][ T4856] worker_thread+0x798/0xbd0 [ 48.486276][ T4856] kthread+0x304/0x3d4 [ 48.486284][ T4856] ret_from_fork+0x10/0x20 [ 48.486296][ T4856] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.486307][ T4856] Bluetooth: hci2: failed to register connection device [ 48.495712][ T1914] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 48.495727][ T1914] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 48.535714][ T4768] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:0' [ 48.535730][ T4768] CPU: 0 UID: 0 PID: 4768 Comm: kworker/u9:1 Tainted: G W syzkaller #0 PREEMPT [ 48.535742][ T4768] Tainted: [W]=WARN [ 48.535745][ T4768] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.535750][ T4768] Workqueue: hci3 hci_rx_work [ 48.535765][ T4768] Call trace: [ 48.535768][ T4768] show_stack+0x2c/0x3c (C) [ 48.535783][ T4768] __dump_stack+0x30/0x40 [ 48.535795][ T4768] dump_stack_lvl+0xd8/0x12c [ 48.535805][ T4768] dump_stack+0x1c/0x28 [ 48.535815][ T4768] sysfs_warn_dup+0x9c/0xb8 [ 48.535826][ T4768] sysfs_create_dir_ns+0x190/0x1f4 [ 48.535836][ T4768] kobject_add_internal+0x290/0x6f0 [ 48.535846][ T4768] kobject_add_varg+0x9c/0xe8 [ 48.535853][ T4768] kobject_add+0x110/0x1c8 [ 48.535860][ T4768] device_add+0x394/0x9e0 [ 48.535867][ T4768] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.535877][ T4768] le_conn_complete_evt+0xc68/0x10f8 [ 48.535886][ T4768] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.535894][ T4768] hci_le_meta_evt+0x2b0/0x46c [ 48.535903][ T4768] hci_event_packet+0x4c0/0x9c8 [ 48.535912][ T4768] hci_rx_work+0x2f4/0xd78 [ 48.535919][ T4768] process_scheduled_works+0x788/0x10b8 [ 48.535929][ T4768] worker_thread+0x798/0xbd0 [ 48.535937][ T4768] kthread+0x304/0x3d4 [ 48.535945][ T4768] ret_from_fork+0x10/0x20 [ 48.535958][ T4768] kobject: kobject_add_internal failed for hci3:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.535970][ T4768] Bluetooth: hci3: failed to register connection device [ 48.538946][ T4768] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 48.538955][ T4768] CPU: 0 UID: 0 PID: 4768 Comm: kworker/u9:1 Tainted: G W syzkaller #0 PREEMPT [ 48.538966][ T4768] Tainted: [W]=WARN [ 48.538970][ T4768] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.538974][ T4768] Workqueue: hci0 hci_rx_work [ 48.538983][ T4768] Call trace: [ 48.538986][ T4768] show_stack+0x2c/0x3c (C) [ 48.538997][ T4768] __dump_stack+0x30/0x40 [ 48.539007][ T4768] dump_stack_lvl+0xd8/0x12c [ 48.539017][ T4768] dump_stack+0x1c/0x28 [ 48.539027][ T4768] sysfs_warn_dup+0x9c/0xb8 [ 48.539037][ T4768] sysfs_create_dir_ns+0x190/0x1f4 [ 48.539046][ T4768] kobject_add_internal+0x290/0x6f0 [ 48.539054][ T4768] kobject_add_varg+0x9c/0xe8 [ 48.539061][ T4768] kobject_add+0x110/0x1c8 [ 48.539068][ T4768] device_add+0x394/0x9e0 [ 48.539075][ T4768] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.539084][ T4768] le_conn_complete_evt+0xc68/0x10f8 [ 48.539093][ T4768] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.539106][ T4768] hci_le_meta_evt+0x2b0/0x46c [ 48.539116][ T4768] hci_event_packet+0x4c0/0x9c8 [ 48.539125][ T4768] hci_rx_work+0x2f4/0xd78 [ 48.539133][ T4768] process_scheduled_works+0x788/0x10b8 [ 48.539143][ T4768] worker_thread+0x798/0xbd0 [ 48.539151][ T4768] kthread+0x304/0x3d4 [ 48.539159][ T4768] ret_from_fork+0x10/0x20 [ 48.539171][ T4768] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.539181][ T4768] Bluetooth: hci0: failed to register connection device [ 48.554841][ T4768] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 48.554851][ T4768] CPU: 0 UID: 0 PID: 4768 Comm: kworker/u9:1 Tainted: G W syzkaller #0 PREEMPT [ 48.554862][ T4768] Tainted: [W]=WARN [ 48.554865][ T4768] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.554870][ T4768] Workqueue: hci2 hci_rx_work [ 48.554879][ T4768] Call trace: [ 48.554882][ T4768] show_stack+0x2c/0x3c (C) [ 48.554893][ T4768] __dump_stack+0x30/0x40 [ 48.554903][ T4768] dump_stack_lvl+0xd8/0x12c [ 48.554912][ T4768] dump_stack+0x1c/0x28 [ 48.554922][ T4768] sysfs_warn_dup+0x9c/0xb8 [ 48.554931][ T4768] sysfs_create_dir_ns+0x190/0x1f4 [ 48.554941][ T4768] kobject_add_internal+0x290/0x6f0 [ 48.554949][ T4768] kobject_add_varg+0x9c/0xe8 [ 48.554956][ T4768] kobject_add+0x110/0x1c8 [ 48.554963][ T4768] device_add+0x394/0x9e0 [ 48.554969][ T4768] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.554979][ T4768] le_conn_complete_evt+0xc68/0x10f8 [ 48.554987][ T4768] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.554995][ T4768] hci_le_meta_evt+0x2b0/0x46c [ 48.555005][ T4768] hci_event_packet+0x4c0/0x9c8 [ 48.555014][ T4768] hci_rx_work+0x2f4/0xd78 [ 48.555020][ T4768] process_scheduled_works+0x788/0x10b8 [ 48.555030][ T4768] worker_thread+0x798/0xbd0 [ 48.555038][ T4768] kthread+0x304/0x3d4 [ 48.555046][ T4768] ret_from_fork+0x10/0x20 [ 48.555058][ T4768] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.555068][ T4768] Bluetooth: hci2: failed to register connection device [ 48.574735][ T4768] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci4/hci4:0' [ 48.574746][ T4768] CPU: 0 UID: 0 PID: 4768 Comm: kworker/u9:1 Tainted: G W syzkaller #0 PREEMPT [ 48.574758][ T4768] Tainted: [W]=WARN [ 48.574761][ T4768] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.574766][ T4768] Workqueue: hci4 hci_rx_work [ 48.574776][ T4768] Call trace: [ 48.574778][ T4768] show_stack+0x2c/0x3c (C) [ 48.574789][ T4768] __dump_stack+0x30/0x40 [ 48.574799][ T4768] dump_stack_lvl+0xd8/0x12c [ 48.574809][ T4768] dump_stack+0x1c/0x28 [ 48.574819][ T4768] sysfs_warn_dup+0x9c/0xb8 [ 48.574829][ T4768] sysfs_create_dir_ns+0x190/0x1f4 [ 48.574838][ T4768] kobject_add_internal+0x290/0x6f0 [ 48.574846][ T4768] kobject_add_varg+0x9c/0xe8 [ 48.574853][ T4768] kobject_add+0x110/0x1c8 [ 48.574860][ T4768] device_add+0x394/0x9e0 [ 48.574868][ T4768] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.574877][ T4768] le_conn_complete_evt+0xc68/0x10f8 [ 48.574886][ T4768] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.574894][ T4768] hci_le_meta_evt+0x2b0/0x46c [ 48.574903][ T4768] hci_event_packet+0x4c0/0x9c8 [ 48.574912][ T4768] hci_rx_work+0x2f4/0xd78 [ 48.574919][ T4768] process_scheduled_works+0x788/0x10b8 [ 48.574928][ T4768] worker_thread+0x798/0xbd0 [ 48.574936][ T4768] kthread+0x304/0x3d4 [ 48.574944][ T4768] ret_from_fork+0x10/0x20 [ 48.574956][ T4768] kobject: kobject_add_internal failed for hci4:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.574966][ T4768] Bluetooth: hci4: failed to register connection device [ 48.591979][ T4768] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 48.591993][ T4768] CPU: 1 UID: 0 PID: 4768 Comm: kworker/u9:1 Tainted: G W syzkaller #0 PREEMPT [ 48.592005][ T4768] Tainted: [W]=WARN [ 48.592008][ T4768] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.592014][ T4768] Workqueue: hci0 hci_rx_work [ 48.592026][ T4768] Call trace: [ 48.592029][ T4768] show_stack+0x2c/0x3c (C) [ 48.592043][ T4768] __dump_stack+0x30/0x40 [ 48.592054][ T4768] dump_stack_lvl+0xd8/0x12c [ 48.592063][ T4768] dump_stack+0x1c/0x28 [ 48.592073][ T4768] sysfs_warn_dup+0x9c/0xb8 [ 48.592083][ T4768] sysfs_create_dir_ns+0x190/0x1f4 [ 48.592093][ T4768] kobject_add_internal+0x290/0x6f0 [ 48.592102][ T4768] kobject_add_varg+0x9c/0xe8 [ 48.592114][ T4768] kobject_add+0x110/0x1c8 [ 48.592122][ T4768] device_add+0x394/0x9e0 [ 48.592131][ T4768] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.592141][ T4768] le_conn_complete_evt+0xc68/0x10f8 [ 48.592149][ T4768] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.592157][ T4768] hci_le_meta_evt+0x2b0/0x46c [ 48.592167][ T4768] hci_event_packet+0x4c0/0x9c8 [ 48.592175][ T4768] hci_rx_work+0x2f4/0xd78 [ 48.592182][ T4768] process_scheduled_works+0x788/0x10b8 [ 48.592192][ T4768] worker_thread+0x798/0xbd0 [ 48.592200][ T4768] kthread+0x304/0x3d4 [ 48.592208][ T4768] ret_from_fork+0x10/0x20 [ 48.592220][ T4768] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.592232][ T4768] Bluetooth: hci0: failed to register connection device [ 48.594077][ T4768] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:0' [ 48.594087][ T4768] CPU: 1 UID: 0 PID: 4768 Comm: kworker/u9:1 Tainted: G W syzkaller #0 PREEMPT [ 48.594098][ T4768] Tainted: [W]=WARN [ 48.594102][ T4768] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.594106][ T4768] Workqueue: hci3 hci_rx_work [ 48.594121][ T4768] Call trace: [ 48.594123][ T4768] show_stack+0x2c/0x3c (C) [ 48.594136][ T4768] __dump_stack+0x30/0x40 [ 48.594146][ T4768] dump_stack_lvl+0xd8/0x12c [ 48.594155][ T4768] dump_stack+0x1c/0x28 [ 48.594165][ T4768] sysfs_warn_dup+0x9c/0xb8 [ 48.594175][ T4768] sysfs_create_dir_ns+0x190/0x1f4 [ 48.594185][ T4768] kobject_add_internal+0x290/0x6f0 [ 48.594193][ T4768] kobject_add_varg+0x9c/0xe8 [ 48.594200][ T4768] kobject_add+0x110/0x1c8 [ 48.594207][ T4768] device_add+0x394/0x9e0 [ 48.594215][ T4768] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.594224][ T4768] le_conn_complete_evt+0xc68/0x10f8 [ 48.594233][ T4768] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.594241][ T4768] hci_le_meta_evt+0x2b0/0x46c [ 48.594251][ T4768] hci_event_packet+0x4c0/0x9c8 [ 48.594260][ T4768] hci_rx_work+0x2f4/0xd78 [ 48.594267][ T4768] process_scheduled_works+0x788/0x10b8 [ 48.594276][ T4768] worker_thread+0x798/0xbd0 [ 48.594285][ T4768] kthread+0x304/0x3d4 [ 48.594293][ T4768] ret_from_fork+0x10/0x20 [ 48.594305][ T4768] kobject: kobject_add_internal failed for hci3:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.594315][ T4768] Bluetooth: hci3: failed to register connection device [ 48.614187][ T4768] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 48.614205][ T4768] CPU: 1 UID: 0 PID: 4768 Comm: kworker/u9:1 Tainted: G W syzkaller #0 PREEMPT [ 48.614218][ T4768] Tainted: [W]=WARN [ 48.614221][ T4768] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.614226][ T4768] Workqueue: hci2 hci_rx_work [ 48.614239][ T4768] Call trace: [ 48.614242][ T4768] show_stack+0x2c/0x3c (C) [ 48.614256][ T4768] __dump_stack+0x30/0x40 [ 48.614266][ T4768] dump_stack_lvl+0xd8/0x12c [ 48.614276][ T4768] dump_stack+0x1c/0x28 [ 48.614285][ T4768] sysfs_warn_dup+0x9c/0xb8 [ 48.614295][ T4768] sysfs_create_dir_ns+0x190/0x1f4 [ 48.614305][ T4768] kobject_add_internal+0x290/0x6f0 [ 48.614314][ T4768] kobject_add_varg+0x9c/0xe8 [ 48.614321][ T4768] kobject_add+0x110/0x1c8 [ 48.614328][ T4768] device_add+0x394/0x9e0 [ 48.614335][ T4768] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.614345][ T4768] le_conn_complete_evt+0xc68/0x10f8 [ 48.614354][ T4768] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.614362][ T4768] hci_le_meta_evt+0x2b0/0x46c [ 48.614371][ T4768] hci_event_packet+0x4c0/0x9c8 [ 48.614380][ T4768] hci_rx_work+0x2f4/0xd78 [ 48.614387][ T4768] process_scheduled_works+0x788/0x10b8 [ 48.614396][ T4768] worker_thread+0x798/0xbd0 [ 48.614404][ T4768] kthread+0x304/0x3d4 [ 48.614412][ T4768] ret_from_fork+0x10/0x20 [ 48.614424][ T4768] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.614435][ T4768] Bluetooth: hci2: failed to register connection device [ 48.636180][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 48.636194][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 48.636207][ T5878] Tainted: [W]=WARN [ 48.636210][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.636215][ T5878] Workqueue: hci0 hci_rx_work [ 48.636228][ T5878] Call trace: [ 48.636231][ T5878] show_stack+0x2c/0x3c (C) [ 48.636246][ T5878] __dump_stack+0x30/0x40 [ 48.636256][ T5878] dump_stack_lvl+0xd8/0x12c [ 48.636266][ T5878] dump_stack+0x1c/0x28 [ 48.636276][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 48.636287][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 48.636297][ T5878] kobject_add_internal+0x290/0x6f0 [ 48.636306][ T5878] kobject_add_varg+0x9c/0xe8 [ 48.636313][ T5878] kobject_add+0x110/0x1c8 [ 48.636320][ T5878] device_add+0x394/0x9e0 [ 48.636328][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.636338][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 48.636347][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.636356][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 48.636365][ T5878] hci_event_packet+0x4c0/0x9c8 [ 48.636373][ T5878] hci_rx_work+0x2f4/0xd78 [ 48.636380][ T5878] process_scheduled_works+0x788/0x10b8 [ 48.636390][ T5878] worker_thread+0x798/0xbd0 [ 48.636398][ T5878] kthread+0x304/0x3d4 [ 48.636406][ T5878] ret_from_fork+0x10/0x20 [ 48.636418][ T5878] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.636430][ T5878] Bluetooth: hci0: failed to register connection device [ 48.637087][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:0' [ 48.637096][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 48.637113][ T5878] Tainted: [W]=WARN [ 48.637117][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.637122][ T5878] Workqueue: hci3 hci_rx_work [ 48.637133][ T5878] Call trace: [ 48.637136][ T5878] show_stack+0x2c/0x3c (C) [ 48.637151][ T5878] __dump_stack+0x30/0x40 [ 48.637162][ T5878] dump_stack_lvl+0xd8/0x12c [ 48.637171][ T5878] dump_stack+0x1c/0x28 [ 48.637181][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 48.637191][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 48.637201][ T5878] kobject_add_internal+0x290/0x6f0 [ 48.637208][ T5878] kobject_add_varg+0x9c/0xe8 [ 48.637216][ T5878] kobject_add+0x110/0x1c8 [ 48.637223][ T5878] device_add+0x394/0x9e0 [ 48.637230][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.637239][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 48.637247][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.637256][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 48.637265][ T5878] hci_event_packet+0x4c0/0x9c8 [ 48.637274][ T5878] hci_rx_work+0x2f4/0xd78 [ 48.637280][ T5878] process_scheduled_works+0x788/0x10b8 [ 48.637289][ T5878] worker_thread+0x798/0xbd0 [ 48.637298][ T5878] kthread+0x304/0x3d4 [ 48.637305][ T5878] ret_from_fork+0x10/0x20 [ 48.637317][ T5878] kobject: kobject_add_internal failed for hci3:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.637327][ T5878] Bluetooth: hci3: failed to register connection device [ 48.659182][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 48.659197][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 48.659208][ T5878] Tainted: [W]=WARN [ 48.659211][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.659216][ T5878] Workqueue: hci2 hci_rx_work [ 48.659230][ T5878] Call trace: [ 48.659233][ T5878] show_stack+0x2c/0x3c (C) [ 48.659246][ T5878] __dump_stack+0x30/0x40 [ 48.659257][ T5878] dump_stack_lvl+0xd8/0x12c [ 48.659267][ T5878] dump_stack+0x1c/0x28 [ 48.659276][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 48.659287][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 48.659297][ T5878] kobject_add_internal+0x290/0x6f0 [ 48.659306][ T5878] kobject_add_varg+0x9c/0xe8 [ 48.659313][ T5878] kobject_add+0x110/0x1c8 [ 48.659320][ T5878] device_add+0x394/0x9e0 [ 48.659328][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.659337][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 48.659346][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.659354][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 48.659364][ T5878] hci_event_packet+0x4c0/0x9c8 [ 48.659372][ T5878] hci_rx_work+0x2f4/0xd78 [ 48.659379][ T5878] process_scheduled_works+0x788/0x10b8 [ 48.659389][ T5878] worker_thread+0x798/0xbd0 [ 48.659398][ T5878] kthread+0x304/0x3d4 [ 48.659405][ T5878] ret_from_fork+0x10/0x20 [ 48.659418][ T5878] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.659431][ T5878] Bluetooth: hci2: failed to register connection device [ 48.681247][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci4/hci4:0' [ 48.681263][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 48.681275][ T5878] Tainted: [W]=WARN [ 48.681279][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.681284][ T5878] Workqueue: hci4 hci_rx_work [ 48.681298][ T5878] Call trace: [ 48.681301][ T5878] show_stack+0x2c/0x3c (C) [ 48.681316][ T5878] __dump_stack+0x30/0x40 [ 48.681327][ T5878] dump_stack_lvl+0xd8/0x12c [ 48.681336][ T5878] dump_stack+0x1c/0x28 [ 48.681346][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 48.681357][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 48.681367][ T5878] kobject_add_internal+0x290/0x6f0 [ 48.681376][ T5878] kobject_add_varg+0x9c/0xe8 [ 48.681383][ T5878] kobject_add+0x110/0x1c8 [ 48.681390][ T5878] device_add+0x394/0x9e0 [ 48.681398][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.681407][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 48.681416][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.681424][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 48.681433][ T5878] hci_event_packet+0x4c0/0x9c8 [ 48.681442][ T5878] hci_rx_work+0x2f4/0xd78 [ 48.681449][ T5878] process_scheduled_works+0x788/0x10b8 [ 48.681459][ T5878] worker_thread+0x798/0xbd0 [ 48.681467][ T5878] kthread+0x304/0x3d4 [ 48.681475][ T5878] ret_from_fork+0x10/0x20 [ 48.681488][ T5878] kobject: kobject_add_internal failed for hci4:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.681503][ T5878] Bluetooth: hci4: failed to register connection device [ 48.685414][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci1/hci1:0' [ 48.685425][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 48.685437][ T5878] Tainted: [W]=WARN [ 48.685440][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.685445][ T5878] Workqueue: hci1 hci_rx_work [ 48.685455][ T5878] Call trace: [ 48.685458][ T5878] show_stack+0x2c/0x3c (C) [ 48.685471][ T5878] __dump_stack+0x30/0x40 [ 48.685483][ T5878] dump_stack_lvl+0xd8/0x12c [ 48.685493][ T5878] dump_stack+0x1c/0x28 [ 48.685502][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 48.685512][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 48.685522][ T5878] kobject_add_internal+0x290/0x6f0 [ 48.685530][ T5878] kobject_add_varg+0x9c/0xe8 [ 48.685537][ T5878] kobject_add+0x110/0x1c8 [ 48.685544][ T5878] device_add+0x394/0x9e0 [ 48.685551][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.685560][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 48.685569][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.685577][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 48.685587][ T5878] hci_event_packet+0x4c0/0x9c8 [ 48.685595][ T5878] hci_rx_work+0x2f4/0xd78 [ 48.685602][ T5878] process_scheduled_works+0x788/0x10b8 [ 48.685611][ T5878] worker_thread+0x798/0xbd0 [ 48.685620][ T5878] kthread+0x304/0x3d4 [ 48.685628][ T5878] ret_from_fork+0x10/0x20 [ 48.685641][ T5878] kobject: kobject_add_internal failed for hci1:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.685652][ T5878] Bluetooth: hci1: failed to register connection device [ 48.694421][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:0' [ 48.694432][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 48.694444][ T5878] Tainted: [W]=WARN [ 48.694447][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.694452][ T5878] Workqueue: hci3 hci_rx_work [ 48.694463][ T5878] Call trace: [ 48.694466][ T5878] show_stack+0x2c/0x3c (C) [ 48.694478][ T5878] __dump_stack+0x30/0x40 [ 48.694487][ T5878] dump_stack_lvl+0xd8/0x12c [ 48.694497][ T5878] dump_stack+0x1c/0x28 [ 48.694507][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 48.694516][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 48.694526][ T5878] kobject_add_internal+0x290/0x6f0 [ 48.694534][ T5878] kobject_add_varg+0x9c/0xe8 [ 48.694541][ T5878] kobject_add+0x110/0x1c8 [ 48.694548][ T5878] device_add+0x394/0x9e0 [ 48.694556][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.694564][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 48.694573][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.694581][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 48.694590][ T5878] hci_event_packet+0x4c0/0x9c8 [ 48.694599][ T5878] hci_rx_work+0x2f4/0xd78 [ 48.694606][ T5878] process_scheduled_works+0x788/0x10b8 [ 48.694615][ T5878] worker_thread+0x798/0xbd0 [ 48.694623][ T5878] kthread+0x304/0x3d4 [ 48.694631][ T5878] ret_from_fork+0x10/0x20 [ 48.694643][ T5878] kobject: kobject_add_internal failed for hci3:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.694654][ T5878] Bluetooth: hci3: failed to register connection device [ 48.704167][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 48.704181][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 48.704192][ T5878] Tainted: [W]=WARN [ 48.704196][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.704201][ T5878] Workqueue: hci0 hci_rx_work [ 48.704211][ T5878] Call trace: [ 48.704214][ T5878] show_stack+0x2c/0x3c (C) [ 48.704227][ T5878] __dump_stack+0x30/0x40 [ 48.704237][ T5878] dump_stack_lvl+0xd8/0x12c [ 48.704246][ T5878] dump_stack+0x1c/0x28 [ 48.704256][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 48.704266][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 48.704275][ T5878] kobject_add_internal+0x290/0x6f0 [ 48.704284][ T5878] kobject_add_varg+0x9c/0xe8 [ 48.704291][ T5878] kobject_add+0x110/0x1c8 [ 48.704297][ T5878] device_add+0x394/0x9e0 [ 48.704305][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.704314][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 48.704322][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.704330][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 48.704339][ T5878] hci_event_packet+0x4c0/0x9c8 [ 48.704348][ T5878] hci_rx_work+0x2f4/0xd78 [ 48.704355][ T5878] process_scheduled_works+0x788/0x10b8 [ 48.704364][ T5878] worker_thread+0x798/0xbd0 [ 48.704372][ T5878] kthread+0x304/0x3d4 [ 48.704380][ T5878] ret_from_fork+0x10/0x20 [ 48.704392][ T5878] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.704403][ T5878] Bluetooth: hci0: failed to register connection device [ 48.738061][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci4/hci4:0' [ 48.738078][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 48.738093][ T5878] Tainted: [W]=WARN [ 48.738097][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.738102][ T5878] Workqueue: hci4 hci_rx_work [ 48.738124][ T5878] Call trace: [ 48.738127][ T5878] show_stack+0x2c/0x3c (C) [ 48.738142][ T5878] __dump_stack+0x30/0x40 [ 48.738153][ T5878] dump_stack_lvl+0xd8/0x12c [ 48.738162][ T5878] dump_stack+0x1c/0x28 [ 48.738172][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 48.738182][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 48.738192][ T5878] kobject_add_internal+0x290/0x6f0 [ 48.738201][ T5878] kobject_add_varg+0x9c/0xe8 [ 48.738208][ T5878] kobject_add+0x110/0x1c8 [ 48.738215][ T5878] device_add+0x394/0x9e0 [ 48.738223][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.738233][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 48.738241][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.738250][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 48.738259][ T5878] hci_event_packet+0x4c0/0x9c8 [ 48.738267][ T5878] hci_rx_work+0x2f4/0xd78 [ 48.738274][ T5878] process_scheduled_works+0x788/0x10b8 [ 48.738284][ T5878] worker_thread+0x798/0xbd0 [ 48.738293][ T5878] kthread+0x304/0x3d4 [ 48.738300][ T5878] ret_from_fork+0x10/0x20 [ 48.738313][ T5878] kobject: kobject_add_internal failed for hci4:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.738324][ T5878] Bluetooth: hci4: failed to register connection device [ 48.738352][ T5878] Bluetooth: hci0: command 0x041b tx timeout [ 48.738414][ T5878] Bluetooth: hci3: command tx timeout [ 48.738430][ T5878] Bluetooth: hci2: command tx timeout [ 48.738443][ T5878] Bluetooth: hci4: command tx timeout [ 48.738659][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 48.738666][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 48.738676][ T5878] Tainted: [W]=WARN [ 48.738679][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.738683][ T5878] Workqueue: hci2 hci_rx_work [ 48.738690][ T5878] Call trace: [ 48.738693][ T5878] show_stack+0x2c/0x3c (C) [ 48.738704][ T5878] __dump_stack+0x30/0x40 [ 48.738714][ T5878] dump_stack_lvl+0xd8/0x12c [ 48.738724][ T5878] dump_stack+0x1c/0x28 [ 48.738733][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 48.738743][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 48.738753][ T5878] kobject_add_internal+0x290/0x6f0 [ 48.738760][ T5878] kobject_add_varg+0x9c/0xe8 [ 48.738768][ T5878] kobject_add+0x110/0x1c8 [ 48.738775][ T5878] device_add+0x394/0x9e0 [ 48.738782][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.738791][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 48.738800][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.738808][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 48.738818][ T5878] hci_event_packet+0x4c0/0x9c8 [ 48.738826][ T5878] hci_rx_work+0x2f4/0xd78 [ 48.738833][ T5878] process_scheduled_works+0x788/0x10b8 [ 48.738843][ T5878] worker_thread+0x798/0xbd0 [ 48.738851][ T5878] kthread+0x304/0x3d4 [ 48.738859][ T5878] ret_from_fork+0x10/0x20 [ 48.738871][ T5878] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.738881][ T5878] Bluetooth: hci2: failed to register connection device [ 48.749230][ T4860] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci1/hci1:0' [ 48.749242][ T4860] CPU: 1 UID: 0 PID: 4860 Comm: kworker/u9:4 Tainted: G W syzkaller #0 PREEMPT [ 48.749254][ T4860] Tainted: [W]=WARN [ 48.749257][ T4860] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.749262][ T4860] Workqueue: hci1 hci_rx_work [ 48.749272][ T4860] Call trace: [ 48.749275][ T4860] show_stack+0x2c/0x3c (C) [ 48.749287][ T4860] __dump_stack+0x30/0x40 [ 48.749297][ T4860] dump_stack_lvl+0xd8/0x12c [ 48.749307][ T4860] dump_stack+0x1c/0x28 [ 48.749316][ T4860] sysfs_warn_dup+0x9c/0xb8 [ 48.749326][ T4860] sysfs_create_dir_ns+0x190/0x1f4 [ 48.749335][ T4860] kobject_add_internal+0x290/0x6f0 [ 48.749343][ T4860] kobject_add_varg+0x9c/0xe8 [ 48.749350][ T4860] kobject_add+0x110/0x1c8 [ 48.749357][ T4860] device_add+0x394/0x9e0 [ 48.749365][ T4860] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.749374][ T4860] le_conn_complete_evt+0xc68/0x10f8 [ 48.749382][ T4860] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.749391][ T4860] hci_le_meta_evt+0x2b0/0x46c [ 48.749400][ T4860] hci_event_packet+0x4c0/0x9c8 [ 48.749409][ T4860] hci_rx_work+0x2f4/0xd78 [ 48.749415][ T4860] process_scheduled_works+0x788/0x10b8 1970/01/01 00:00:49 executed programs: 490 [ 48.749424][ T4860] worker_thread+0x798/0xbd0 [ 48.749433][ T4860] kthread+0x304/0x3d4 [ 48.749440][ T4860] ret_from_fork+0x10/0x20 [ 48.749452][ T4860] kobject: kobject_add_internal failed for hci1:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.749463][ T4860] Bluetooth: hci1: failed to register connection device [ 48.776524][ T4860] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:0' [ 48.776541][ T4860] CPU: 1 UID: 0 PID: 4860 Comm: kworker/u9:4 Tainted: G W syzkaller #0 PREEMPT [ 48.776553][ T4860] Tainted: [W]=WARN [ 48.776557][ T4860] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.776563][ T4860] Workqueue: hci3 hci_rx_work [ 48.776577][ T4860] Call trace: [ 48.776580][ T4860] show_stack+0x2c/0x3c (C) [ 48.776596][ T4860] __dump_stack+0x30/0x40 [ 48.776606][ T4860] dump_stack_lvl+0xd8/0x12c [ 48.776616][ T4860] dump_stack+0x1c/0x28 [ 48.776626][ T4860] sysfs_warn_dup+0x9c/0xb8 [ 48.776636][ T4860] sysfs_create_dir_ns+0x190/0x1f4 [ 48.776646][ T4860] kobject_add_internal+0x290/0x6f0 [ 48.776655][ T4860] kobject_add_varg+0x9c/0xe8 [ 48.776662][ T4860] kobject_add+0x110/0x1c8 [ 48.776669][ T4860] device_add+0x394/0x9e0 [ 48.776677][ T4860] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.776687][ T4860] le_conn_complete_evt+0xc68/0x10f8 [ 48.776695][ T4860] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.776704][ T4860] hci_le_meta_evt+0x2b0/0x46c [ 48.776713][ T4860] hci_event_packet+0x4c0/0x9c8 [ 48.776722][ T4860] hci_rx_work+0x2f4/0xd78 [ 48.776728][ T4860] process_scheduled_works+0x788/0x10b8 [ 48.776738][ T4860] worker_thread+0x798/0xbd0 [ 48.776747][ T4860] kthread+0x304/0x3d4 [ 48.776754][ T4860] ret_from_fork+0x10/0x20 [ 48.776768][ T4860] kobject: kobject_add_internal failed for hci3:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.776789][ T4860] Bluetooth: hci3: failed to register connection device [ 48.777298][ T4860] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 48.777307][ T4860] CPU: 1 UID: 0 PID: 4860 Comm: kworker/u9:4 Tainted: G W syzkaller #0 PREEMPT [ 48.777318][ T4860] Tainted: [W]=WARN [ 48.777321][ T4860] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.777326][ T4860] Workqueue: hci0 hci_rx_work [ 48.777334][ T4860] Call trace: [ 48.777337][ T4860] show_stack+0x2c/0x3c (C) [ 48.777348][ T4860] __dump_stack+0x30/0x40 [ 48.777358][ T4860] dump_stack_lvl+0xd8/0x12c [ 48.777368][ T4860] dump_stack+0x1c/0x28 [ 48.777378][ T4860] sysfs_warn_dup+0x9c/0xb8 [ 48.777388][ T4860] sysfs_create_dir_ns+0x190/0x1f4 [ 48.777398][ T4860] kobject_add_internal+0x290/0x6f0 [ 48.777406][ T4860] kobject_add_varg+0x9c/0xe8 [ 48.777413][ T4860] kobject_add+0x110/0x1c8 [ 48.777420][ T4860] device_add+0x394/0x9e0 [ 48.777427][ T4860] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.777436][ T4860] le_conn_complete_evt+0xc68/0x10f8 [ 48.777444][ T4860] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.777453][ T4860] hci_le_meta_evt+0x2b0/0x46c [ 48.777462][ T4860] hci_event_packet+0x4c0/0x9c8 [ 48.777470][ T4860] hci_rx_work+0x2f4/0xd78 [ 48.777477][ T4860] process_scheduled_works+0x788/0x10b8 [ 48.777486][ T4860] worker_thread+0x798/0xbd0 [ 48.777494][ T4860] kthread+0x304/0x3d4 [ 48.777502][ T4860] ret_from_fork+0x10/0x20 [ 48.777514][ T4860] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.777524][ T4860] Bluetooth: hci0: failed to register connection device [ 48.779985][ T4860] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 48.779998][ T4860] CPU: 1 UID: 0 PID: 4860 Comm: kworker/u9:4 Tainted: G W syzkaller #0 PREEMPT [ 48.780010][ T4860] Tainted: [W]=WARN [ 48.780013][ T4860] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.780019][ T4860] Workqueue: hci2 hci_rx_work [ 48.780027][ T4860] Call trace: [ 48.780030][ T4860] show_stack+0x2c/0x3c (C) [ 48.780042][ T4860] __dump_stack+0x30/0x40 [ 48.780052][ T4860] dump_stack_lvl+0xd8/0x12c [ 48.780062][ T4860] dump_stack+0x1c/0x28 [ 48.780072][ T4860] sysfs_warn_dup+0x9c/0xb8 [ 48.780085][ T4860] sysfs_create_dir_ns+0x190/0x1f4 [ 48.780095][ T4860] kobject_add_internal+0x290/0x6f0 [ 48.780104][ T4860] kobject_add_varg+0x9c/0xe8 [ 48.780115][ T4860] kobject_add+0x110/0x1c8 [ 48.780122][ T4860] device_add+0x394/0x9e0 [ 48.780130][ T4860] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.780139][ T4860] le_conn_complete_evt+0xc68/0x10f8 [ 48.780147][ T4860] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.780156][ T4860] hci_le_meta_evt+0x2b0/0x46c [ 48.780165][ T4860] hci_event_packet+0x4c0/0x9c8 [ 48.780173][ T4860] hci_rx_work+0x2f4/0xd78 [ 48.780180][ T4860] process_scheduled_works+0x788/0x10b8 [ 48.780190][ T4860] worker_thread+0x798/0xbd0 [ 48.780198][ T4860] kthread+0x304/0x3d4 [ 48.780206][ T4860] ret_from_fork+0x10/0x20 [ 48.780303][ T4860] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.780314][ T4860] Bluetooth: hci2: failed to register connection device [ 48.800995][ T4860] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci1/hci1:0' [ 48.801010][ T4860] CPU: 1 UID: 0 PID: 4860 Comm: kworker/u9:4 Tainted: G W syzkaller #0 PREEMPT [ 48.801023][ T4860] Tainted: [W]=WARN [ 48.801026][ T4860] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.801031][ T4860] Workqueue: hci1 hci_rx_work [ 48.801045][ T4860] Call trace: [ 48.801048][ T4860] show_stack+0x2c/0x3c (C) [ 48.801063][ T4860] __dump_stack+0x30/0x40 [ 48.801074][ T4860] dump_stack_lvl+0xd8/0x12c [ 48.801084][ T4860] dump_stack+0x1c/0x28 [ 48.801093][ T4860] sysfs_warn_dup+0x9c/0xb8 [ 48.801104][ T4860] sysfs_create_dir_ns+0x190/0x1f4 [ 48.801123][ T4860] kobject_add_internal+0x290/0x6f0 [ 48.801132][ T4860] kobject_add_varg+0x9c/0xe8 [ 48.801140][ T4860] kobject_add+0x110/0x1c8 [ 48.801147][ T4860] device_add+0x394/0x9e0 [ 48.801155][ T4860] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.801165][ T4860] le_conn_complete_evt+0xc68/0x10f8 [ 48.801174][ T4860] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.801182][ T4860] hci_le_meta_evt+0x2b0/0x46c [ 48.801191][ T4860] hci_event_packet+0x4c0/0x9c8 [ 48.801200][ T4860] hci_rx_work+0x2f4/0xd78 [ 48.801206][ T4860] process_scheduled_works+0x788/0x10b8 [ 48.801216][ T4860] worker_thread+0x798/0xbd0 [ 48.801225][ T4860] kthread+0x304/0x3d4 [ 48.801232][ T4860] ret_from_fork+0x10/0x20 [ 48.801245][ T4860] kobject: kobject_add_internal failed for hci1:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.801258][ T4860] Bluetooth: hci1: failed to register connection device [ 48.807853][ T4860] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:0' [ 48.807865][ T4860] CPU: 1 UID: 0 PID: 4860 Comm: kworker/u9:4 Tainted: G W syzkaller #0 PREEMPT [ 48.807876][ T4860] Tainted: [W]=WARN [ 48.807879][ T4860] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.807884][ T4860] Workqueue: hci3 hci_rx_work [ 48.807894][ T4860] Call trace: [ 48.807897][ T4860] show_stack+0x2c/0x3c (C) [ 48.807911][ T4860] __dump_stack+0x30/0x40 [ 48.807921][ T4860] dump_stack_lvl+0xd8/0x12c [ 48.807931][ T4860] dump_stack+0x1c/0x28 [ 48.807940][ T4860] sysfs_warn_dup+0x9c/0xb8 [ 48.807950][ T4860] sysfs_create_dir_ns+0x190/0x1f4 [ 48.807960][ T4860] kobject_add_internal+0x290/0x6f0 [ 48.807968][ T4860] kobject_add_varg+0x9c/0xe8 [ 48.807975][ T4860] kobject_add+0x110/0x1c8 [ 48.807982][ T4860] device_add+0x394/0x9e0 [ 48.807989][ T4860] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.807998][ T4860] le_conn_complete_evt+0xc68/0x10f8 [ 48.808007][ T4860] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.808015][ T4860] hci_le_meta_evt+0x2b0/0x46c [ 48.808024][ T4860] hci_event_packet+0x4c0/0x9c8 [ 48.808033][ T4860] hci_rx_work+0x2f4/0xd78 [ 48.808039][ T4860] process_scheduled_works+0x788/0x10b8 [ 48.808048][ T4860] worker_thread+0x798/0xbd0 [ 48.808057][ T4860] kthread+0x304/0x3d4 [ 48.808064][ T4860] ret_from_fork+0x10/0x20 [ 48.808076][ T4860] kobject: kobject_add_internal failed for hci3:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.808087][ T4860] Bluetooth: hci3: failed to register connection device [ 48.822134][ T4860] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci4/hci4:0' [ 48.822149][ T4860] CPU: 1 UID: 0 PID: 4860 Comm: kworker/u9:4 Tainted: G W syzkaller #0 PREEMPT [ 48.822162][ T4860] Tainted: [W]=WARN [ 48.822165][ T4860] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.822170][ T4860] Workqueue: hci4 hci_rx_work [ 48.822183][ T4860] Call trace: [ 48.822186][ T4860] show_stack+0x2c/0x3c (C) [ 48.822201][ T4860] __dump_stack+0x30/0x40 [ 48.822211][ T4860] dump_stack_lvl+0xd8/0x12c [ 48.822221][ T4860] dump_stack+0x1c/0x28 [ 48.822231][ T4860] sysfs_warn_dup+0x9c/0xb8 [ 48.822242][ T4860] sysfs_create_dir_ns+0x190/0x1f4 [ 48.822251][ T4860] kobject_add_internal+0x290/0x6f0 [ 48.822260][ T4860] kobject_add_varg+0x9c/0xe8 [ 48.822267][ T4860] kobject_add+0x110/0x1c8 [ 48.822274][ T4860] device_add+0x394/0x9e0 [ 48.822281][ T4860] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.822291][ T4860] le_conn_complete_evt+0xc68/0x10f8 [ 48.822299][ T4860] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.822307][ T4860] hci_le_meta_evt+0x2b0/0x46c [ 48.822317][ T4860] hci_event_packet+0x4c0/0x9c8 [ 48.822325][ T4860] hci_rx_work+0x2f4/0xd78 [ 48.822332][ T4860] process_scheduled_works+0x788/0x10b8 [ 48.822341][ T4860] worker_thread+0x798/0xbd0 [ 48.822350][ T4860] kthread+0x304/0x3d4 [ 48.822357][ T4860] ret_from_fork+0x10/0x20 [ 48.822369][ T4860] kobject: kobject_add_internal failed for hci4:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.822381][ T4860] Bluetooth: hci4: failed to register connection device [ 48.836093][ T4860] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 48.836106][ T4860] CPU: 1 UID: 0 PID: 4860 Comm: kworker/u9:4 Tainted: G W syzkaller #0 PREEMPT [ 48.836123][ T4860] Tainted: [W]=WARN [ 48.836126][ T4860] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.836131][ T4860] Workqueue: hci0 hci_rx_work [ 48.836144][ T4860] Call trace: [ 48.836147][ T4860] show_stack+0x2c/0x3c (C) [ 48.836161][ T4860] __dump_stack+0x30/0x40 [ 48.836172][ T4860] dump_stack_lvl+0xd8/0x12c [ 48.836182][ T4860] dump_stack+0x1c/0x28 [ 48.836191][ T4860] sysfs_warn_dup+0x9c/0xb8 [ 48.836202][ T4860] sysfs_create_dir_ns+0x190/0x1f4 [ 48.836212][ T4860] kobject_add_internal+0x290/0x6f0 [ 48.836221][ T4860] kobject_add_varg+0x9c/0xe8 [ 48.836228][ T4860] kobject_add+0x110/0x1c8 [ 48.836235][ T4860] device_add+0x394/0x9e0 [ 48.836242][ T4860] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.836252][ T4860] le_conn_complete_evt+0xc68/0x10f8 [ 48.836261][ T4860] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.836269][ T4860] hci_le_meta_evt+0x2b0/0x46c [ 48.836278][ T4860] hci_event_packet+0x4c0/0x9c8 [ 48.836287][ T4860] hci_rx_work+0x2f4/0xd78 [ 48.836294][ T4860] process_scheduled_works+0x788/0x10b8 [ 48.836303][ T4860] worker_thread+0x798/0xbd0 [ 48.836312][ T4860] kthread+0x304/0x3d4 [ 48.836319][ T4860] ret_from_fork+0x10/0x20 [ 48.836332][ T4860] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.836344][ T4860] Bluetooth: hci0: failed to register connection device [ 48.859237][ T4860] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 48.859256][ T4860] CPU: 1 UID: 0 PID: 4860 Comm: kworker/u9:4 Tainted: G W syzkaller #0 PREEMPT [ 48.859269][ T4860] Tainted: [W]=WARN [ 48.859273][ T4860] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.859278][ T4860] Workqueue: hci2 hci_rx_work [ 48.859294][ T4860] Call trace: [ 48.859297][ T4860] show_stack+0x2c/0x3c (C) [ 48.859314][ T4860] __dump_stack+0x30/0x40 [ 48.859325][ T4860] dump_stack_lvl+0xd8/0x12c [ 48.859335][ T4860] dump_stack+0x1c/0x28 [ 48.859345][ T4860] sysfs_warn_dup+0x9c/0xb8 [ 48.859356][ T4860] sysfs_create_dir_ns+0x190/0x1f4 [ 48.859365][ T4860] kobject_add_internal+0x290/0x6f0 [ 48.859375][ T4860] kobject_add_varg+0x9c/0xe8 [ 48.859382][ T4860] kobject_add+0x110/0x1c8 [ 48.859389][ T4860] device_add+0x394/0x9e0 [ 48.859396][ T4860] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.859406][ T4860] le_conn_complete_evt+0xc68/0x10f8 [ 48.859414][ T4860] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.859423][ T4860] hci_le_meta_evt+0x2b0/0x46c [ 48.859432][ T4860] hci_event_packet+0x4c0/0x9c8 [ 48.859441][ T4860] hci_rx_work+0x2f4/0xd78 [ 48.859447][ T4860] process_scheduled_works+0x788/0x10b8 [ 48.859457][ T4860] worker_thread+0x798/0xbd0 [ 48.859465][ T4860] kthread+0x304/0x3d4 [ 48.859473][ T4860] ret_from_fork+0x10/0x20 [ 48.859486][ T4860] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.859500][ T4860] Bluetooth: hci2: failed to register connection device [ 48.859589][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:0' [ 48.859596][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 48.859606][ T5878] Tainted: [W]=WARN [ 48.859608][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.859613][ T5878] Workqueue: hci3 hci_rx_work [ 48.859620][ T5878] Call trace: [ 48.859622][ T5878] show_stack+0x2c/0x3c (C) [ 48.859633][ T5878] __dump_stack+0x30/0x40 [ 48.859642][ T5878] dump_stack_lvl+0xd8/0x12c [ 48.859652][ T5878] dump_stack+0x1c/0x28 [ 48.859662][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 48.859671][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 48.859681][ T5878] kobject_add_internal+0x290/0x6f0 [ 48.859689][ T5878] kobject_add_varg+0x9c/0xe8 [ 48.859696][ T5878] kobject_add+0x110/0x1c8 [ 48.859703][ T5878] device_add+0x394/0x9e0 [ 48.859710][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.859719][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 48.859727][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.859735][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 48.859744][ T5878] hci_event_packet+0x4c0/0x9c8 [ 48.859753][ T5878] hci_rx_work+0x2f4/0xd78 [ 48.859760][ T5878] process_scheduled_works+0x788/0x10b8 [ 48.859769][ T5878] worker_thread+0x798/0xbd0 [ 48.859777][ T5878] kthread+0x304/0x3d4 [ 48.859784][ T5878] ret_from_fork+0x10/0x20 [ 48.859801][ T5878] kobject: kobject_add_internal failed for hci3:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.859812][ T5878] Bluetooth: hci3: failed to register connection device [ 48.862921][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci1/hci1:0' [ 48.862931][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 48.862942][ T5878] Tainted: [W]=WARN [ 48.862945][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.862950][ T5878] Workqueue: hci1 hci_rx_work [ 48.862959][ T5878] Call trace: [ 48.862962][ T5878] show_stack+0x2c/0x3c (C) [ 48.862973][ T5878] __dump_stack+0x30/0x40 [ 48.862984][ T5878] dump_stack_lvl+0xd8/0x12c [ 48.862994][ T5878] dump_stack+0x1c/0x28 [ 48.863003][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 48.863013][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 48.863023][ T5878] kobject_add_internal+0x290/0x6f0 [ 48.863031][ T5878] kobject_add_varg+0x9c/0xe8 [ 48.863038][ T5878] kobject_add+0x110/0x1c8 [ 48.863045][ T5878] device_add+0x394/0x9e0 [ 48.863052][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.863061][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 48.863070][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.863078][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 48.863087][ T5878] hci_event_packet+0x4c0/0x9c8 [ 48.863096][ T5878] hci_rx_work+0x2f4/0xd78 [ 48.863102][ T5878] process_scheduled_works+0x788/0x10b8 [ 48.863120][ T5878] worker_thread+0x798/0xbd0 [ 48.863129][ T5878] kthread+0x304/0x3d4 [ 48.863137][ T5878] ret_from_fork+0x10/0x20 [ 48.863149][ T5878] kobject: kobject_add_internal failed for hci1:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.863161][ T5878] Bluetooth: hci1: failed to register connection device [ 48.885143][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci4/hci4:0' [ 48.885161][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 48.885175][ T5878] Tainted: [W]=WARN [ 48.885179][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.885184][ T5878] Workqueue: hci4 hci_rx_work [ 48.885198][ T5878] Call trace: [ 48.885201][ T5878] show_stack+0x2c/0x3c (C) [ 48.885216][ T5878] __dump_stack+0x30/0x40 [ 48.885227][ T5878] dump_stack_lvl+0xd8/0x12c [ 48.885237][ T5878] dump_stack+0x1c/0x28 [ 48.885246][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 48.885257][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 48.885267][ T5878] kobject_add_internal+0x290/0x6f0 [ 48.885277][ T5878] kobject_add_varg+0x9c/0xe8 [ 48.885284][ T5878] kobject_add+0x110/0x1c8 [ 48.885291][ T5878] device_add+0x394/0x9e0 [ 48.885299][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.885308][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 48.885317][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.885325][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 48.885334][ T5878] hci_event_packet+0x4c0/0x9c8 [ 48.885343][ T5878] hci_rx_work+0x2f4/0xd78 [ 48.885350][ T5878] process_scheduled_works+0x788/0x10b8 [ 48.885359][ T5878] worker_thread+0x798/0xbd0 [ 48.885368][ T5878] kthread+0x304/0x3d4 [ 48.885375][ T5878] ret_from_fork+0x10/0x20 [ 48.885388][ T5878] kobject: kobject_add_internal failed for hci4:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.885400][ T5878] Bluetooth: hci4: failed to register connection device [ 48.912840][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 48.912855][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 48.912868][ T5878] Tainted: [W]=WARN [ 48.912871][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.912876][ T5878] Workqueue: hci2 hci_rx_work [ 48.912891][ T5878] Call trace: [ 48.912894][ T5878] show_stack+0x2c/0x3c (C) [ 48.912909][ T5878] __dump_stack+0x30/0x40 [ 48.912920][ T5878] dump_stack_lvl+0xd8/0x12c [ 48.912930][ T5878] dump_stack+0x1c/0x28 [ 48.912939][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 48.912950][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 48.912960][ T5878] kobject_add_internal+0x290/0x6f0 [ 48.912969][ T5878] kobject_add_varg+0x9c/0xe8 [ 48.912976][ T5878] kobject_add+0x110/0x1c8 [ 48.912983][ T5878] device_add+0x394/0x9e0 [ 48.912991][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.913001][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 48.913010][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.913018][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 48.913027][ T5878] hci_event_packet+0x4c0/0x9c8 [ 48.913036][ T5878] hci_rx_work+0x2f4/0xd78 [ 48.913043][ T5878] process_scheduled_works+0x788/0x10b8 [ 48.913053][ T5878] worker_thread+0x798/0xbd0 [ 48.913061][ T5878] kthread+0x304/0x3d4 [ 48.913069][ T5878] ret_from_fork+0x10/0x20 [ 48.913081][ T5878] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.913093][ T5878] Bluetooth: hci2: failed to register connection device [ 48.915041][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:0' [ 48.915051][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 48.915063][ T5878] Tainted: [W]=WARN [ 48.915066][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.915071][ T5878] Workqueue: hci3 hci_rx_work [ 48.915080][ T5878] Call trace: [ 48.915082][ T5878] show_stack+0x2c/0x3c (C) [ 48.915095][ T5878] __dump_stack+0x30/0x40 [ 48.915105][ T5878] dump_stack_lvl+0xd8/0x12c [ 48.915120][ T5878] dump_stack+0x1c/0x28 [ 48.915131][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 48.915141][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 48.915151][ T5878] kobject_add_internal+0x290/0x6f0 [ 48.915159][ T5878] kobject_add_varg+0x9c/0xe8 [ 48.915166][ T5878] kobject_add+0x110/0x1c8 [ 48.915173][ T5878] device_add+0x394/0x9e0 [ 48.915180][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.915189][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 48.915198][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.915206][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 48.915215][ T5878] hci_event_packet+0x4c0/0x9c8 [ 48.915224][ T5878] hci_rx_work+0x2f4/0xd78 [ 48.915231][ T5878] process_scheduled_works+0x788/0x10b8 [ 48.915240][ T5878] worker_thread+0x798/0xbd0 [ 48.915248][ T5878] kthread+0x304/0x3d4 [ 48.915256][ T5878] ret_from_fork+0x10/0x20 [ 48.915268][ T5878] kobject: kobject_add_internal failed for hci3:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.915279][ T5878] Bluetooth: hci3: failed to register connection device [ 48.916881][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci1/hci1:0' [ 48.916891][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 48.916903][ T5878] Tainted: [W]=WARN [ 48.916906][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.916911][ T5878] Workqueue: hci1 hci_rx_work [ 48.916920][ T5878] Call trace: [ 48.916922][ T5878] show_stack+0x2c/0x3c (C) [ 48.916934][ T5878] __dump_stack+0x30/0x40 [ 48.916944][ T5878] dump_stack_lvl+0xd8/0x12c [ 48.916954][ T5878] dump_stack+0x1c/0x28 [ 48.916964][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 48.916974][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 48.916983][ T5878] kobject_add_internal+0x290/0x6f0 [ 48.916991][ T5878] kobject_add_varg+0x9c/0xe8 [ 48.916998][ T5878] kobject_add+0x110/0x1c8 [ 48.917005][ T5878] device_add+0x394/0x9e0 [ 48.917012][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.917021][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 48.917030][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.917038][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 48.917047][ T5878] hci_event_packet+0x4c0/0x9c8 [ 48.917056][ T5878] hci_rx_work+0x2f4/0xd78 [ 48.917063][ T5878] process_scheduled_works+0x788/0x10b8 [ 48.917072][ T5878] worker_thread+0x798/0xbd0 [ 48.917080][ T5878] kthread+0x304/0x3d4 [ 48.917088][ T5878] ret_from_fork+0x10/0x20 [ 48.917099][ T5878] kobject: kobject_add_internal failed for hci1:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.917116][ T5878] Bluetooth: hci1: failed to register connection device [ 48.929351][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci4/hci4:0' [ 48.929364][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 48.929376][ T5878] Tainted: [W]=WARN [ 48.929379][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.929383][ T5878] Workqueue: hci4 hci_rx_work [ 48.929396][ T5878] Call trace: [ 48.929398][ T5878] show_stack+0x2c/0x3c (C) [ 48.929412][ T5878] __dump_stack+0x30/0x40 [ 48.929422][ T5878] dump_stack_lvl+0xd8/0x12c [ 48.929432][ T5878] dump_stack+0x1c/0x28 [ 48.929441][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 48.929451][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 48.929461][ T5878] kobject_add_internal+0x290/0x6f0 [ 48.929470][ T5878] kobject_add_varg+0x9c/0xe8 [ 48.929477][ T5878] kobject_add+0x110/0x1c8 [ 48.929484][ T5878] device_add+0x394/0x9e0 [ 48.929491][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.929500][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 48.929508][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.929516][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 48.929525][ T5878] hci_event_packet+0x4c0/0x9c8 [ 48.929534][ T5878] hci_rx_work+0x2f4/0xd78 [ 48.929541][ T5878] process_scheduled_works+0x788/0x10b8 [ 48.929550][ T5878] worker_thread+0x798/0xbd0 [ 48.929558][ T5878] kthread+0x304/0x3d4 [ 48.929566][ T5878] ret_from_fork+0x10/0x20 [ 48.929578][ T5878] kobject: kobject_add_internal failed for hci4:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.929590][ T5878] Bluetooth: hci4: failed to register connection device [ 48.945754][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 48.945769][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 48.945781][ T5878] Tainted: [W]=WARN [ 48.945784][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.945789][ T5878] Workqueue: hci0 hci_rx_work [ 48.945803][ T5878] Call trace: [ 48.945805][ T5878] show_stack+0x2c/0x3c (C) [ 48.945820][ T5878] __dump_stack+0x30/0x40 [ 48.945830][ T5878] dump_stack_lvl+0xd8/0x12c [ 48.945840][ T5878] dump_stack+0x1c/0x28 [ 48.945850][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 48.945861][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 48.945870][ T5878] kobject_add_internal+0x290/0x6f0 [ 48.945880][ T5878] kobject_add_varg+0x9c/0xe8 [ 48.945887][ T5878] kobject_add+0x110/0x1c8 [ 48.945894][ T5878] device_add+0x394/0x9e0 [ 48.945901][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.945910][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 48.945919][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.945927][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 48.945937][ T5878] hci_event_packet+0x4c0/0x9c8 [ 48.945945][ T5878] hci_rx_work+0x2f4/0xd78 [ 48.945952][ T5878] process_scheduled_works+0x788/0x10b8 [ 48.945961][ T5878] worker_thread+0x798/0xbd0 [ 48.945970][ T5878] kthread+0x304/0x3d4 [ 48.945977][ T5878] ret_from_fork+0x10/0x20 [ 48.945990][ T5878] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.946003][ T5878] Bluetooth: hci0: failed to register connection device [ 48.952016][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 48.952027][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 48.952039][ T5878] Tainted: [W]=WARN [ 48.952042][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.952047][ T5878] Workqueue: hci2 hci_rx_work [ 48.952057][ T5878] Call trace: [ 48.952060][ T5878] show_stack+0x2c/0x3c (C) [ 48.952072][ T5878] __dump_stack+0x30/0x40 [ 48.952082][ T5878] dump_stack_lvl+0xd8/0x12c [ 48.952092][ T5878] dump_stack+0x1c/0x28 [ 48.952101][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 48.952116][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 48.952126][ T5878] kobject_add_internal+0x290/0x6f0 [ 48.952135][ T5878] kobject_add_varg+0x9c/0xe8 [ 48.952142][ T5878] kobject_add+0x110/0x1c8 [ 48.952149][ T5878] device_add+0x394/0x9e0 [ 48.952156][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.952165][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 48.952174][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.952182][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 48.952191][ T5878] hci_event_packet+0x4c0/0x9c8 [ 48.952199][ T5878] hci_rx_work+0x2f4/0xd78 [ 48.952206][ T5878] process_scheduled_works+0x788/0x10b8 [ 48.952215][ T5878] worker_thread+0x798/0xbd0 [ 48.952223][ T5878] kthread+0x304/0x3d4 [ 48.952231][ T5878] ret_from_fork+0x10/0x20 [ 48.952243][ T5878] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.952254][ T5878] Bluetooth: hci2: failed to register connection device [ 48.960748][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci1/hci1:0' [ 48.960760][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 48.960772][ T5878] Tainted: [W]=WARN [ 48.960775][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.960779][ T5878] Workqueue: hci1 hci_rx_work [ 48.960790][ T5878] Call trace: [ 48.960793][ T5878] show_stack+0x2c/0x3c (C) [ 48.960806][ T5878] __dump_stack+0x30/0x40 [ 48.960816][ T5878] dump_stack_lvl+0xd8/0x12c [ 48.960826][ T5878] dump_stack+0x1c/0x28 [ 48.960835][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 48.960845][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 48.960855][ T5878] kobject_add_internal+0x290/0x6f0 [ 48.960863][ T5878] kobject_add_varg+0x9c/0xe8 [ 48.960870][ T5878] kobject_add+0x110/0x1c8 [ 48.960877][ T5878] device_add+0x394/0x9e0 [ 48.960884][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.960893][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 48.960902][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.960910][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 48.960919][ T5878] hci_event_packet+0x4c0/0x9c8 [ 48.960927][ T5878] hci_rx_work+0x2f4/0xd78 [ 48.960934][ T5878] process_scheduled_works+0x788/0x10b8 [ 48.960943][ T5878] worker_thread+0x798/0xbd0 [ 48.960952][ T5878] kthread+0x304/0x3d4 [ 48.960959][ T5878] ret_from_fork+0x10/0x20 [ 48.960971][ T5878] kobject: kobject_add_internal failed for hci1:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.960982][ T5878] Bluetooth: hci1: failed to register connection device [ 48.993084][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci4/hci4:0' [ 48.993100][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 48.993118][ T5878] Tainted: [W]=WARN [ 48.993122][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.993128][ T5878] Workqueue: hci4 hci_rx_work [ 48.993144][ T5878] Call trace: [ 48.993148][ T5878] show_stack+0x2c/0x3c (C) [ 48.993164][ T5878] __dump_stack+0x30/0x40 [ 48.993175][ T5878] dump_stack_lvl+0xd8/0x12c [ 48.993185][ T5878] dump_stack+0x1c/0x28 [ 48.993195][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 48.993206][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 48.993216][ T5878] kobject_add_internal+0x290/0x6f0 [ 48.993225][ T5878] kobject_add_varg+0x9c/0xe8 [ 48.993232][ T5878] kobject_add+0x110/0x1c8 [ 48.993239][ T5878] device_add+0x394/0x9e0 [ 48.993247][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.993257][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 48.993265][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.993273][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 48.993283][ T5878] hci_event_packet+0x4c0/0x9c8 [ 48.993291][ T5878] hci_rx_work+0x2f4/0xd78 [ 48.993298][ T5878] process_scheduled_works+0x788/0x10b8 [ 48.993308][ T5878] worker_thread+0x798/0xbd0 [ 48.993317][ T5878] kthread+0x304/0x3d4 [ 48.993324][ T5878] ret_from_fork+0x10/0x20 [ 48.993337][ T5878] kobject: kobject_add_internal failed for hci4:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.993348][ T5878] Bluetooth: hci4: failed to register connection device [ 48.996838][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 48.996849][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 48.996861][ T5878] Tainted: [W]=WARN [ 48.996864][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.996869][ T5878] Workqueue: hci0 hci_rx_work [ 48.996879][ T5878] Call trace: [ 48.996882][ T5878] show_stack+0x2c/0x3c (C) [ 48.996894][ T5878] __dump_stack+0x30/0x40 [ 48.996904][ T5878] dump_stack_lvl+0xd8/0x12c [ 48.996914][ T5878] dump_stack+0x1c/0x28 [ 48.996924][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 48.996934][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 48.996943][ T5878] kobject_add_internal+0x290/0x6f0 [ 48.996952][ T5878] kobject_add_varg+0x9c/0xe8 [ 48.996959][ T5878] kobject_add+0x110/0x1c8 [ 48.996966][ T5878] device_add+0x394/0x9e0 [ 48.996973][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.996982][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 48.996991][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.996999][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 48.997008][ T5878] hci_event_packet+0x4c0/0x9c8 [ 48.997017][ T5878] hci_rx_work+0x2f4/0xd78 [ 48.997024][ T5878] process_scheduled_works+0x788/0x10b8 [ 48.997033][ T5878] worker_thread+0x798/0xbd0 [ 48.997042][ T5878] kthread+0x304/0x3d4 [ 48.997049][ T5878] ret_from_fork+0x10/0x20 [ 48.997061][ T5878] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.997071][ T5878] Bluetooth: hci0: failed to register connection device [ 49.030816][ T4860] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci1/hci1:0' [ 49.030834][ T4860] CPU: 1 UID: 0 PID: 4860 Comm: kworker/u9:4 Tainted: G W syzkaller #0 PREEMPT [ 49.030847][ T4860] Tainted: [W]=WARN [ 49.030850][ T4860] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.030856][ T4860] Workqueue: hci1 hci_rx_work [ 49.030871][ T4860] Call trace: [ 49.030874][ T4860] show_stack+0x2c/0x3c (C) [ 49.030889][ T4860] __dump_stack+0x30/0x40 [ 49.030900][ T4860] dump_stack_lvl+0xd8/0x12c [ 49.030910][ T4860] dump_stack+0x1c/0x28 [ 49.030919][ T4860] sysfs_warn_dup+0x9c/0xb8 [ 49.030930][ T4860] sysfs_create_dir_ns+0x190/0x1f4 [ 49.030940][ T4860] kobject_add_internal+0x290/0x6f0 [ 49.030949][ T4860] kobject_add_varg+0x9c/0xe8 [ 49.030956][ T4860] kobject_add+0x110/0x1c8 [ 49.030963][ T4860] device_add+0x394/0x9e0 [ 49.030971][ T4860] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.030980][ T4860] le_conn_complete_evt+0xc68/0x10f8 [ 49.030989][ T4860] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.030997][ T4860] hci_le_meta_evt+0x2b0/0x46c [ 49.031006][ T4860] hci_event_packet+0x4c0/0x9c8 [ 49.031015][ T4860] hci_rx_work+0x2f4/0xd78 [ 49.031022][ T4860] process_scheduled_works+0x788/0x10b8 [ 49.031032][ T4860] worker_thread+0x798/0xbd0 [ 49.031040][ T4860] kthread+0x304/0x3d4 [ 49.031048][ T4860] ret_from_fork+0x10/0x20 [ 49.031061][ T4860] kobject: kobject_add_internal failed for hci1:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.031082][ T4860] Bluetooth: hci1: failed to register connection device [ 49.031196][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 49.031203][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 49.031212][ T5914] Tainted: [W]=WARN [ 49.031215][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.031219][ T5914] Workqueue: hci2 hci_rx_work [ 49.031226][ T5914] Call trace: [ 49.031229][ T5914] show_stack+0x2c/0x3c (C) [ 49.031239][ T5914] __dump_stack+0x30/0x40 [ 49.031249][ T5914] dump_stack_lvl+0xd8/0x12c [ 49.031259][ T5914] dump_stack+0x1c/0x28 [ 49.031268][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 49.031278][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 49.031287][ T5914] kobject_add_internal+0x290/0x6f0 [ 49.031295][ T5914] kobject_add_varg+0x9c/0xe8 [ 49.031302][ T5914] kobject_add+0x110/0x1c8 [ 49.031309][ T5914] device_add+0x394/0x9e0 [ 49.031316][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.031325][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 49.031333][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.031342][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 49.031351][ T5914] hci_event_packet+0x4c0/0x9c8 [ 49.031359][ T5914] hci_rx_work+0x2f4/0xd78 [ 49.031366][ T5914] process_scheduled_works+0x788/0x10b8 [ 49.031375][ T5914] worker_thread+0x798/0xbd0 [ 49.031383][ T5914] kthread+0x304/0x3d4 [ 49.031391][ T5914] ret_from_fork+0x10/0x20 [ 49.031402][ T5914] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.031413][ T5914] Bluetooth: hci2: failed to register connection device [ 49.031483][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:0' [ 49.031490][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.031499][ T5878] Tainted: [W]=WARN [ 49.031502][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.031506][ T5878] Workqueue: hci3 hci_rx_work [ 49.031513][ T5878] Call trace: [ 49.031516][ T5878] show_stack+0x2c/0x3c (C) [ 49.031526][ T5878] __dump_stack+0x30/0x40 [ 49.031536][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.031545][ T5878] dump_stack+0x1c/0x28 [ 49.031555][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.031564][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.031573][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.031581][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.031588][ T5878] kobject_add+0x110/0x1c8 [ 49.031595][ T5878] device_add+0x394/0x9e0 [ 49.031602][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.031611][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.031619][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.031627][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.031636][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.031644][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.031651][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.031660][ T5878] worker_thread+0x798/0xbd0 [ 49.031668][ T5878] kthread+0x304/0x3d4 [ 49.031675][ T5878] ret_from_fork+0x10/0x20 [ 49.031687][ T5878] kobject: kobject_add_internal failed for hci3:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.031698][ T5878] Bluetooth: hci3: failed to register connection device [ 49.039903][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:0' [ 49.039916][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.039928][ T5878] Tainted: [W]=WARN [ 49.039932][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.039937][ T5878] Workqueue: hci3 hci_rx_work [ 49.039948][ T5878] Call trace: [ 49.039951][ T5878] show_stack+0x2c/0x3c (C) [ 49.039964][ T5878] __dump_stack+0x30/0x40 [ 49.039974][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.039984][ T5878] dump_stack+0x1c/0x28 [ 49.039993][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.040003][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.040013][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.040021][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.040028][ T5878] kobject_add+0x110/0x1c8 [ 49.040035][ T5878] device_add+0x394/0x9e0 [ 49.040043][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.040052][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.040060][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.040069][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.040078][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.040093][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.040101][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.040117][ T5878] worker_thread+0x798/0xbd0 [ 49.040125][ T5878] kthread+0x304/0x3d4 [ 49.040133][ T5878] ret_from_fork+0x10/0x20 [ 49.041439][ T5878] kobject: kobject_add_internal failed for hci3:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.041454][ T5878] Bluetooth: hci3: failed to register connection device [ 49.045533][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci4/hci4:0' [ 49.045543][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.045554][ T5878] Tainted: [W]=WARN [ 49.045557][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.045562][ T5878] Workqueue: hci4 hci_rx_work [ 49.045571][ T5878] Call trace: [ 49.045574][ T5878] show_stack+0x2c/0x3c (C) [ 49.045586][ T5878] __dump_stack+0x30/0x40 [ 49.045596][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.045606][ T5878] dump_stack+0x1c/0x28 [ 49.045615][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.045624][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.045634][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.045642][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.045649][ T5878] kobject_add+0x110/0x1c8 [ 49.045656][ T5878] device_add+0x394/0x9e0 [ 49.045663][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.045672][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.045681][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.045689][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.045698][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.045706][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.045713][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.045722][ T5878] worker_thread+0x798/0xbd0 [ 49.045730][ T5878] kthread+0x304/0x3d4 [ 49.045738][ T5878] ret_from_fork+0x10/0x20 [ 49.045750][ T5878] kobject: kobject_add_internal failed for hci4:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.045760][ T5878] Bluetooth: hci4: failed to register connection device [ 49.072400][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci1/hci1:0' [ 49.072415][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.072427][ T5878] Tainted: [W]=WARN [ 49.072430][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.072435][ T5878] Workqueue: hci1 hci_rx_work [ 49.072449][ T5878] Call trace: [ 49.072453][ T5878] show_stack+0x2c/0x3c (C) [ 49.072467][ T5878] __dump_stack+0x30/0x40 [ 49.072478][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.072488][ T5878] dump_stack+0x1c/0x28 [ 49.072497][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.072508][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.072517][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.072526][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.072533][ T5878] kobject_add+0x110/0x1c8 [ 49.072540][ T5878] device_add+0x394/0x9e0 [ 49.072548][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.072557][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.072566][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.072574][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.072583][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.072591][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.072598][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.072608][ T5878] worker_thread+0x798/0xbd0 [ 49.072616][ T5878] kthread+0x304/0x3d4 [ 49.072624][ T5878] ret_from_fork+0x10/0x20 [ 49.072636][ T5878] kobject: kobject_add_internal failed for hci1:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.072648][ T5878] Bluetooth: hci1: failed to register connection device [ 49.084342][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci4/hci4:0' [ 49.084356][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.084368][ T5878] Tainted: [W]=WARN [ 49.084371][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.084376][ T5878] Workqueue: hci4 hci_rx_work [ 49.084389][ T5878] Call trace: [ 49.084391][ T5878] show_stack+0x2c/0x3c (C) [ 49.084406][ T5878] __dump_stack+0x30/0x40 [ 49.084416][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.084426][ T5878] dump_stack+0x1c/0x28 [ 49.084435][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.084446][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.084456][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.084465][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.084472][ T5878] kobject_add+0x110/0x1c8 [ 49.084479][ T5878] device_add+0x394/0x9e0 [ 49.084486][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.084496][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.084504][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.084512][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.084522][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.084530][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.084537][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.084547][ T5878] worker_thread+0x798/0xbd0 [ 49.084555][ T5878] kthread+0x304/0x3d4 [ 49.084562][ T5878] ret_from_fork+0x10/0x20 [ 49.084575][ T5878] kobject: kobject_add_internal failed for hci4:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.084587][ T5878] Bluetooth: hci4: failed to register connection device [ 49.087888][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:0' [ 49.087899][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.087911][ T5878] Tainted: [W]=WARN [ 49.087915][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.087920][ T5878] Workqueue: hci3 hci_rx_work [ 49.087930][ T5878] Call trace: [ 49.087933][ T5878] show_stack+0x2c/0x3c (C) [ 49.087945][ T5878] __dump_stack+0x30/0x40 [ 49.087955][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.087965][ T5878] dump_stack+0x1c/0x28 [ 49.087975][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.087985][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.087994][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.088003][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.088010][ T5878] kobject_add+0x110/0x1c8 [ 49.088017][ T5878] device_add+0x394/0x9e0 [ 49.088024][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.088034][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.088043][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.088051][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.088060][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.088068][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.088075][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.088085][ T5878] worker_thread+0x798/0xbd0 [ 49.088093][ T5878] kthread+0x304/0x3d4 [ 49.088100][ T5878] ret_from_fork+0x10/0x20 [ 49.088120][ T5878] kobject: kobject_add_internal failed for hci3:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.088137][ T5878] Bluetooth: hci3: failed to register connection device [ 49.093099][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 49.093114][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.093128][ T5878] Tainted: [W]=WARN [ 49.093132][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.093137][ T5878] Workqueue: hci0 hci_rx_work [ 49.093148][ T5878] Call trace: [ 49.093151][ T5878] show_stack+0x2c/0x3c (C) [ 49.093164][ T5878] __dump_stack+0x30/0x40 [ 49.093175][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.093185][ T5878] dump_stack+0x1c/0x28 [ 49.093194][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.093204][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.093214][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.093222][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.093229][ T5878] kobject_add+0x110/0x1c8 [ 49.093236][ T5878] device_add+0x394/0x9e0 [ 49.093244][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.093253][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.093262][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.093270][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.093280][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.093289][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.093295][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.093305][ T5878] worker_thread+0x798/0xbd0 [ 49.093313][ T5878] kthread+0x304/0x3d4 [ 49.093321][ T5878] ret_from_fork+0x10/0x20 [ 49.093333][ T5878] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.093343][ T5878] Bluetooth: hci0: failed to register connection device [ 49.107251][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci1/hci1:0' [ 49.107268][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.107280][ T5878] Tainted: [W]=WARN [ 49.107284][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.107289][ T5878] Workqueue: hci1 hci_rx_work [ 49.107302][ T5878] Call trace: [ 49.107305][ T5878] show_stack+0x2c/0x3c (C) [ 49.107320][ T5878] __dump_stack+0x30/0x40 [ 49.107330][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.107340][ T5878] dump_stack+0x1c/0x28 [ 49.107349][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.107360][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.107370][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.107379][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.107386][ T5878] kobject_add+0x110/0x1c8 [ 49.107393][ T5878] device_add+0x394/0x9e0 [ 49.107401][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.107410][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.107419][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.107427][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.107436][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.107445][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.107452][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.107461][ T5878] worker_thread+0x798/0xbd0 [ 49.107470][ T5878] kthread+0x304/0x3d4 [ 49.107477][ T5878] ret_from_fork+0x10/0x20 [ 49.107491][ T5878] kobject: kobject_add_internal failed for hci1:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.107503][ T5878] Bluetooth: hci1: failed to register connection device [ 49.123746][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 49.123761][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.123774][ T5878] Tainted: [W]=WARN [ 49.123777][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.123782][ T5878] Workqueue: hci2 hci_rx_work [ 49.123796][ T5878] Call trace: [ 49.123799][ T5878] show_stack+0x2c/0x3c (C) [ 49.123814][ T5878] __dump_stack+0x30/0x40 [ 49.123826][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.123836][ T5878] dump_stack+0x1c/0x28 [ 49.123845][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.123857][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.123866][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.123876][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.123883][ T5878] kobject_add+0x110/0x1c8 [ 49.123890][ T5878] device_add+0x394/0x9e0 [ 49.123898][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.123908][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.123918][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.123926][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.123935][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.123944][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.123951][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.123961][ T5878] worker_thread+0x798/0xbd0 [ 49.123969][ T5878] kthread+0x304/0x3d4 [ 49.123976][ T5878] ret_from_fork+0x10/0x20 [ 49.123989][ T5878] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.124000][ T5878] Bluetooth: hci2: failed to register connection device [ 49.127274][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:0' [ 49.127285][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.127296][ T5878] Tainted: [W]=WARN [ 49.127300][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.127304][ T5878] Workqueue: hci3 hci_rx_work [ 49.127314][ T5878] Call trace: [ 49.127317][ T5878] show_stack+0x2c/0x3c (C) [ 49.127329][ T5878] __dump_stack+0x30/0x40 [ 49.127339][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.127349][ T5878] dump_stack+0x1c/0x28 [ 49.127358][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.127368][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.127377][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.127385][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.127392][ T5878] kobject_add+0x110/0x1c8 [ 49.127399][ T5878] device_add+0x394/0x9e0 [ 49.127407][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.127416][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.127424][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.127432][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.127442][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.127450][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.127457][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.127466][ T5878] worker_thread+0x798/0xbd0 [ 49.127474][ T5878] kthread+0x304/0x3d4 [ 49.127482][ T5878] ret_from_fork+0x10/0x20 [ 49.127494][ T5878] kobject: kobject_add_internal failed for hci3:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.127505][ T5878] Bluetooth: hci3: failed to register connection device [ 49.127707][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci4/hci4:0' [ 49.127716][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.127728][ T5878] Tainted: [W]=WARN [ 49.127731][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.127736][ T5878] Workqueue: hci4 hci_rx_work [ 49.127744][ T5878] Call trace: [ 49.127747][ T5878] show_stack+0x2c/0x3c (C) [ 49.127758][ T5878] __dump_stack+0x30/0x40 [ 49.127768][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.127778][ T5878] dump_stack+0x1c/0x28 [ 49.127787][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.127797][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.127806][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.127814][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.127821][ T5878] kobject_add+0x110/0x1c8 [ 49.127828][ T5878] device_add+0x394/0x9e0 [ 49.127835][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.127844][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.127853][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.127861][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.127870][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.127879][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.127885][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.127894][ T5878] worker_thread+0x798/0xbd0 [ 49.127903][ T5878] kthread+0x304/0x3d4 [ 49.127910][ T5878] ret_from_fork+0x10/0x20 [ 49.127922][ T5878] kobject: kobject_add_internal failed for hci4:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.127931][ T5878] Bluetooth: hci4: failed to register connection device [ 49.163902][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci1/hci1:0' [ 49.163917][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.163930][ T5878] Tainted: [W]=WARN [ 49.163934][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.163939][ T5878] Workqueue: hci1 hci_rx_work [ 49.163954][ T5878] Call trace: [ 49.163957][ T5878] show_stack+0x2c/0x3c (C) [ 49.163972][ T5878] __dump_stack+0x30/0x40 [ 49.163984][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.163994][ T5878] dump_stack+0x1c/0x28 [ 49.164003][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.164015][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.164024][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.164034][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.164041][ T5878] kobject_add+0x110/0x1c8 [ 49.164048][ T5878] device_add+0x394/0x9e0 [ 49.164056][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.164066][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.164075][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.164084][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.164093][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.164102][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.164114][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.164125][ T5878] worker_thread+0x798/0xbd0 [ 49.164133][ T5878] kthread+0x304/0x3d4 [ 49.164141][ T5878] ret_from_fork+0x10/0x20 [ 49.164153][ T5878] kobject: kobject_add_internal failed for hci1:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.164165][ T5878] Bluetooth: hci1: failed to register connection device [ 49.171650][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 49.171662][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.171673][ T5878] Tainted: [W]=WARN [ 49.171676][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.171681][ T5878] Workqueue: hci0 hci_rx_work [ 49.171691][ T5878] Call trace: [ 49.171694][ T5878] show_stack+0x2c/0x3c (C) [ 49.171707][ T5878] __dump_stack+0x30/0x40 [ 49.171717][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.171727][ T5878] dump_stack+0x1c/0x28 [ 49.171736][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.171746][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.171756][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.171764][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.171771][ T5878] kobject_add+0x110/0x1c8 [ 49.171778][ T5878] device_add+0x394/0x9e0 [ 49.171786][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.171795][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.171803][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.171811][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.171821][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.171829][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.171836][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.171845][ T5878] worker_thread+0x798/0xbd0 [ 49.171853][ T5878] kthread+0x304/0x3d4 [ 49.171861][ T5878] ret_from_fork+0x10/0x20 [ 49.171874][ T5878] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.171885][ T5878] Bluetooth: hci0: failed to register connection device [ 49.186422][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci4/hci4:0' [ 49.186436][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.186448][ T5878] Tainted: [W]=WARN [ 49.186452][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.186457][ T5878] Workqueue: hci4 hci_rx_work [ 49.186470][ T5878] Call trace: [ 49.186473][ T5878] show_stack+0x2c/0x3c (C) [ 49.186488][ T5878] __dump_stack+0x30/0x40 [ 49.186500][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.186510][ T5878] dump_stack+0x1c/0x28 [ 49.186519][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.186530][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.186540][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.186549][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.186556][ T5878] kobject_add+0x110/0x1c8 [ 49.186563][ T5878] device_add+0x394/0x9e0 [ 49.186571][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.186581][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.186590][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.186599][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.186609][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.186617][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.186624][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.186633][ T5878] worker_thread+0x798/0xbd0 [ 49.186642][ T5878] kthread+0x304/0x3d4 [ 49.186649][ T5878] ret_from_fork+0x10/0x20 [ 49.186662][ T5878] kobject: kobject_add_internal failed for hci4:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.186674][ T5878] Bluetooth: hci4: failed to register connection device [ 49.196204][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:0' [ 49.196219][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.196230][ T5878] Tainted: [W]=WARN [ 49.196234][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.196239][ T5878] Workqueue: hci3 hci_rx_work [ 49.196251][ T5878] Call trace: [ 49.196254][ T5878] show_stack+0x2c/0x3c (C) [ 49.196268][ T5878] __dump_stack+0x30/0x40 [ 49.196278][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.196288][ T5878] dump_stack+0x1c/0x28 [ 49.196298][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.196308][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.196318][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.196326][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.196333][ T5878] kobject_add+0x110/0x1c8 [ 49.196340][ T5878] device_add+0x394/0x9e0 [ 49.196348][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.196357][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.196366][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.196374][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.196383][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.196392][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.196398][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.196408][ T5878] worker_thread+0x798/0xbd0 [ 49.196416][ T5878] kthread+0x304/0x3d4 [ 49.196424][ T5878] ret_from_fork+0x10/0x20 [ 49.196437][ T5878] kobject: kobject_add_internal failed for hci3:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.196448][ T5878] Bluetooth: hci3: failed to register connection device [ 49.201815][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 49.201826][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.201838][ T5878] Tainted: [W]=WARN [ 49.201841][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.201846][ T5878] Workqueue: hci2 hci_rx_work [ 49.201856][ T5878] Call trace: [ 49.201859][ T5878] show_stack+0x2c/0x3c (C) [ 49.201872][ T5878] __dump_stack+0x30/0x40 [ 49.201882][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.201892][ T5878] dump_stack+0x1c/0x28 [ 49.201901][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.201912][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.201921][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.201930][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.201937][ T5878] kobject_add+0x110/0x1c8 [ 49.201944][ T5878] device_add+0x394/0x9e0 [ 49.201951][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.201961][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.201969][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.201977][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.201987][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.201995][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.202002][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.202011][ T5878] worker_thread+0x798/0xbd0 [ 49.202020][ T5878] kthread+0x304/0x3d4 [ 49.202028][ T5878] ret_from_fork+0x10/0x20 [ 49.202040][ T5878] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.202051][ T5878] Bluetooth: hci2: failed to register connection device [ 49.204035][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci1/hci1:0' [ 49.204046][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.204057][ T5878] Tainted: [W]=WARN [ 49.204060][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.204065][ T5878] Workqueue: hci1 hci_rx_work [ 49.204075][ T5878] Call trace: [ 49.204077][ T5878] show_stack+0x2c/0x3c (C) [ 49.204095][ T5878] __dump_stack+0x30/0x40 [ 49.204107][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.204123][ T5878] dump_stack+0x1c/0x28 [ 49.204134][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.204145][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.204156][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.204164][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.204172][ T5878] kobject_add+0x110/0x1c8 [ 49.204179][ T5878] device_add+0x394/0x9e0 [ 49.204186][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.204196][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.204204][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.204213][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.204222][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.204230][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.204237][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.204246][ T5878] worker_thread+0x798/0xbd0 [ 49.204255][ T5878] kthread+0x304/0x3d4 [ 49.204263][ T5878] ret_from_fork+0x10/0x20 [ 49.204288][ T5878] kobject: kobject_add_internal failed for hci1:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.204302][ T5878] Bluetooth: hci1: failed to register connection device [ 49.208733][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci4/hci4:0' [ 49.208743][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.208755][ T5878] Tainted: [W]=WARN [ 49.208758][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.208762][ T5878] Workqueue: hci4 hci_rx_work [ 49.208772][ T5878] Call trace: [ 49.208774][ T5878] show_stack+0x2c/0x3c (C) [ 49.208786][ T5878] __dump_stack+0x30/0x40 [ 49.208796][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.208806][ T5878] dump_stack+0x1c/0x28 [ 49.208815][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.208825][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.208834][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.208843][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.208850][ T5878] kobject_add+0x110/0x1c8 [ 49.208857][ T5878] device_add+0x394/0x9e0 [ 49.208864][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.208873][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.208882][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.208890][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.208899][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.208908][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.208914][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.208923][ T5878] worker_thread+0x798/0xbd0 [ 49.208932][ T5878] kthread+0x304/0x3d4 [ 49.208939][ T5878] ret_from_fork+0x10/0x20 [ 49.208965][ T5878] kobject: kobject_add_internal failed for hci4:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.208977][ T5878] Bluetooth: hci4: failed to register connection device [ 49.244299][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 49.244315][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.244327][ T5878] Tainted: [W]=WARN [ 49.244331][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.244335][ T5878] Workqueue: hci0 hci_rx_work [ 49.244350][ T5878] Call trace: [ 49.244353][ T5878] show_stack+0x2c/0x3c (C) [ 49.244368][ T5878] __dump_stack+0x30/0x40 [ 49.244380][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.244390][ T5878] dump_stack+0x1c/0x28 [ 49.244399][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.244411][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.244421][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.244431][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.244438][ T5878] kobject_add+0x110/0x1c8 [ 49.244445][ T5878] device_add+0x394/0x9e0 [ 49.244453][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.244463][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.244472][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.244481][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.244490][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.244499][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.244506][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.244515][ T5878] worker_thread+0x798/0xbd0 [ 49.244524][ T5878] kthread+0x304/0x3d4 [ 49.244532][ T5878] ret_from_fork+0x10/0x20 [ 49.244544][ T5878] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.244556][ T5878] Bluetooth: hci0: failed to register connection device [ 49.251997][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:0' [ 49.252009][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.252020][ T5878] Tainted: [W]=WARN [ 49.252023][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.252028][ T5878] Workqueue: hci3 hci_rx_work [ 49.252040][ T5878] Call trace: [ 49.252042][ T5878] show_stack+0x2c/0x3c (C) [ 49.252056][ T5878] __dump_stack+0x30/0x40 [ 49.252066][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.252076][ T5878] dump_stack+0x1c/0x28 [ 49.252085][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.252096][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.252106][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.252120][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.252127][ T5878] kobject_add+0x110/0x1c8 [ 49.252135][ T5878] device_add+0x394/0x9e0 [ 49.252142][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.252152][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.252161][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.252169][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.252178][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.252187][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.252194][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.252203][ T5878] worker_thread+0x798/0xbd0 [ 49.252212][ T5878] kthread+0x304/0x3d4 [ 49.252219][ T5878] ret_from_fork+0x10/0x20 [ 49.252232][ T5878] kobject: kobject_add_internal failed for hci3:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.252243][ T5878] Bluetooth: hci3: failed to register connection device [ 49.261984][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 49.262000][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.262012][ T5878] Tainted: [W]=WARN [ 49.262015][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.262020][ T5878] Workqueue: hci2 hci_rx_work [ 49.262033][ T5878] Call trace: [ 49.262036][ T5878] show_stack+0x2c/0x3c (C) [ 49.262051][ T5878] __dump_stack+0x30/0x40 [ 49.262064][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.262073][ T5878] dump_stack+0x1c/0x28 [ 49.262083][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.262095][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.262104][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.262119][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.262127][ T5878] kobject_add+0x110/0x1c8 [ 49.262134][ T5878] device_add+0x394/0x9e0 [ 49.262142][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.262152][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.262162][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.262170][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.262179][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.262188][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.262195][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.262204][ T5878] worker_thread+0x798/0xbd0 [ 49.262213][ T5878] kthread+0x304/0x3d4 [ 49.262220][ T5878] ret_from_fork+0x10/0x20 [ 49.262239][ T5878] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.262253][ T5878] Bluetooth: hci2: failed to register connection device [ 49.264304][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci1/hci1:0' [ 49.264314][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.264325][ T5878] Tainted: [W]=WARN [ 49.264328][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.264333][ T5878] Workqueue: hci1 hci_rx_work [ 49.264342][ T5878] Call trace: [ 49.264344][ T5878] show_stack+0x2c/0x3c (C) [ 49.264356][ T5878] __dump_stack+0x30/0x40 [ 49.264366][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.264375][ T5878] dump_stack+0x1c/0x28 [ 49.264385][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.264395][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.264404][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.264412][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.264419][ T5878] kobject_add+0x110/0x1c8 [ 49.264426][ T5878] device_add+0x394/0x9e0 [ 49.264433][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.264443][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.264451][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.264459][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.264468][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.264477][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.264484][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.264493][ T5878] worker_thread+0x798/0xbd0 [ 49.264502][ T5878] kthread+0x304/0x3d4 [ 49.264509][ T5878] ret_from_fork+0x10/0x20 [ 49.264525][ T5878] kobject: kobject_add_internal failed for hci1:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.264536][ T5878] Bluetooth: hci1: failed to register connection device [ 49.283261][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci4/hci4:0' [ 49.283279][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.283292][ T5878] Tainted: [W]=WARN [ 49.283295][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.283300][ T5878] Workqueue: hci4 hci_rx_work [ 49.283315][ T5878] Call trace: [ 49.283318][ T5878] show_stack+0x2c/0x3c (C) [ 49.283332][ T5878] __dump_stack+0x30/0x40 [ 49.283344][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.283353][ T5878] dump_stack+0x1c/0x28 [ 49.283363][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.283374][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.283383][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.283393][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.283400][ T5878] kobject_add+0x110/0x1c8 [ 49.283407][ T5878] device_add+0x394/0x9e0 [ 49.283415][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.283424][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.283434][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.283442][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.283452][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.283460][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.283467][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.283477][ T5878] worker_thread+0x798/0xbd0 [ 49.283486][ T5878] kthread+0x304/0x3d4 [ 49.283493][ T5878] ret_from_fork+0x10/0x20 [ 49.283506][ T5878] kobject: kobject_add_internal failed for hci4:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.283518][ T5878] Bluetooth: hci4: failed to register connection device [ 49.289239][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 49.289251][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.289262][ T5878] Tainted: [W]=WARN [ 49.289265][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.289270][ T5878] Workqueue: hci0 hci_rx_work [ 49.289280][ T5878] Call trace: [ 49.289283][ T5878] show_stack+0x2c/0x3c (C) [ 49.289295][ T5878] __dump_stack+0x30/0x40 [ 49.289307][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.289317][ T5878] dump_stack+0x1c/0x28 [ 49.289326][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.289337][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.289347][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.289355][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.289362][ T5878] kobject_add+0x110/0x1c8 [ 49.289369][ T5878] device_add+0x394/0x9e0 [ 49.289376][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.289385][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.289395][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.289403][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.289412][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.289421][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.289428][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.289437][ T5878] worker_thread+0x798/0xbd0 [ 49.289446][ T5878] kthread+0x304/0x3d4 [ 49.289453][ T5878] ret_from_fork+0x10/0x20 [ 49.289466][ T5878] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.289479][ T5878] Bluetooth: hci0: failed to register connection device [ 49.308577][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:0' [ 49.308592][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.308604][ T5878] Tainted: [W]=WARN [ 49.308607][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.308612][ T5878] Workqueue: hci3 hci_rx_work [ 49.308626][ T5878] Call trace: [ 49.308629][ T5878] show_stack+0x2c/0x3c (C) [ 49.308644][ T5878] __dump_stack+0x30/0x40 [ 49.308655][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.308665][ T5878] dump_stack+0x1c/0x28 [ 49.308674][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.308686][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.308695][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.308704][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.308712][ T5878] kobject_add+0x110/0x1c8 [ 49.308718][ T5878] device_add+0x394/0x9e0 [ 49.308726][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.308736][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.308745][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.308753][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.308763][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.308772][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.308778][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.308788][ T5878] worker_thread+0x798/0xbd0 [ 49.308796][ T5878] kthread+0x304/0x3d4 [ 49.308804][ T5878] ret_from_fork+0x10/0x20 [ 49.308816][ T5878] kobject: kobject_add_internal failed for hci3:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.308828][ T5878] Bluetooth: hci3: failed to register connection device [ 49.317313][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci1/hci1:0' [ 49.317325][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.317336][ T5878] Tainted: [W]=WARN [ 49.317340][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.317344][ T5878] Workqueue: hci1 hci_rx_work [ 49.317356][ T5878] Call trace: [ 49.317358][ T5878] show_stack+0x2c/0x3c (C) [ 49.317372][ T5878] __dump_stack+0x30/0x40 [ 49.317382][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.317392][ T5878] dump_stack+0x1c/0x28 [ 49.317401][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.317412][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.317421][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.317430][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.317437][ T5878] kobject_add+0x110/0x1c8 [ 49.317444][ T5878] device_add+0x394/0x9e0 [ 49.317452][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.317461][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.317469][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.317478][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.317487][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.317495][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.317502][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.317511][ T5878] worker_thread+0x798/0xbd0 [ 49.317520][ T5878] kthread+0x304/0x3d4 [ 49.317527][ T5878] ret_from_fork+0x10/0x20 [ 49.317540][ T5878] kobject: kobject_add_internal failed for hci1:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.317552][ T5878] Bluetooth: hci1: failed to register connection device [ 49.318946][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 49.318956][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.318967][ T5878] Tainted: [W]=WARN [ 49.318971][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.318976][ T5878] Workqueue: hci2 hci_rx_work [ 49.318985][ T5878] Call trace: [ 49.318988][ T5878] show_stack+0x2c/0x3c (C) [ 49.319000][ T5878] __dump_stack+0x30/0x40 [ 49.319011][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.319020][ T5878] dump_stack+0x1c/0x28 [ 49.319030][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.319040][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.319050][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.319058][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.319065][ T5878] kobject_add+0x110/0x1c8 [ 49.319072][ T5878] device_add+0x394/0x9e0 [ 49.319079][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.319088][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.319097][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.319105][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.319120][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.319129][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.319137][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.319146][ T5878] worker_thread+0x798/0xbd0 [ 49.319156][ T5878] kthread+0x304/0x3d4 [ 49.319164][ T5878] ret_from_fork+0x10/0x20 [ 49.319177][ T5878] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.319188][ T5878] Bluetooth: hci2: failed to register connection device [ 49.342055][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 49.342072][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.342086][ T5878] Tainted: [W]=WARN [ 49.342090][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.342095][ T5878] Workqueue: hci0 hci_rx_work [ 49.342114][ T5878] Call trace: [ 49.342117][ T5878] show_stack+0x2c/0x3c (C) [ 49.342133][ T5878] __dump_stack+0x30/0x40 [ 49.342146][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.342157][ T5878] dump_stack+0x1c/0x28 [ 49.342167][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.342178][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.342188][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.342197][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.342204][ T5878] kobject_add+0x110/0x1c8 [ 49.342211][ T5878] device_add+0x394/0x9e0 [ 49.342219][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.342229][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.342237][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.342246][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.342255][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.342263][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.342270][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.342280][ T5878] worker_thread+0x798/0xbd0 [ 49.342288][ T5878] kthread+0x304/0x3d4 [ 49.342296][ T5878] ret_from_fork+0x10/0x20 [ 49.342309][ T5878] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.342321][ T5878] Bluetooth: hci0: failed to register connection device [ 49.357291][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:0' [ 49.357305][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.357317][ T5878] Tainted: [W]=WARN [ 49.357320][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.357326][ T5878] Workqueue: hci3 hci_rx_work [ 49.357339][ T5878] Call trace: [ 49.357342][ T5878] show_stack+0x2c/0x3c (C) [ 49.357357][ T5878] __dump_stack+0x30/0x40 [ 49.357367][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.357377][ T5878] dump_stack+0x1c/0x28 [ 49.357387][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.357397][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.357407][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.357416][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.357423][ T5878] kobject_add+0x110/0x1c8 [ 49.357430][ T5878] device_add+0x394/0x9e0 [ 49.357438][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.357447][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.357455][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.357464][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.357473][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.357481][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.357488][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.357498][ T5878] worker_thread+0x798/0xbd0 [ 49.357506][ T5878] kthread+0x304/0x3d4 [ 49.357514][ T5878] ret_from_fork+0x10/0x20 [ 49.357527][ T5878] kobject: kobject_add_internal failed for hci3:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.357539][ T5878] Bluetooth: hci3: failed to register connection device [ 49.361704][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci4/hci4:0' [ 49.361715][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.361728][ T5878] Tainted: [W]=WARN [ 49.361731][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.361736][ T5878] Workqueue: hci4 hci_rx_work [ 49.361746][ T5878] Call trace: [ 49.361749][ T5878] show_stack+0x2c/0x3c (C) [ 49.361761][ T5878] __dump_stack+0x30/0x40 [ 49.361772][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.361782][ T5878] dump_stack+0x1c/0x28 [ 49.361791][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.361801][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.361811][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.361819][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.361826][ T5878] kobject_add+0x110/0x1c8 [ 49.361833][ T5878] device_add+0x394/0x9e0 [ 49.361840][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.361849][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.361858][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.361866][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.361876][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.361884][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.361891][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.361900][ T5878] worker_thread+0x798/0xbd0 [ 49.361908][ T5878] kthread+0x304/0x3d4 [ 49.361916][ T5878] ret_from_fork+0x10/0x20 [ 49.361928][ T5878] kobject: kobject_add_internal failed for hci4:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.361940][ T5878] Bluetooth: hci4: failed to register connection device [ 49.366199][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci1/hci1:0' [ 49.366213][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.366224][ T5878] Tainted: [W]=WARN [ 49.366228][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.366233][ T5878] Workqueue: hci1 hci_rx_work [ 49.366244][ T5878] Call trace: [ 49.366247][ T5878] show_stack+0x2c/0x3c (C) [ 49.366261][ T5878] __dump_stack+0x30/0x40 [ 49.366271][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.366281][ T5878] dump_stack+0x1c/0x28 [ 49.366291][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.366301][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.366310][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.366318][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.366325][ T5878] kobject_add+0x110/0x1c8 [ 49.366332][ T5878] device_add+0x394/0x9e0 [ 49.366340][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.366349][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.366358][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.366366][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.366375][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.366383][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.366390][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.366399][ T5878] worker_thread+0x798/0xbd0 [ 49.366408][ T5878] kthread+0x304/0x3d4 [ 49.366415][ T5878] ret_from_fork+0x10/0x20 [ 49.366428][ T5878] kobject: kobject_add_internal failed for hci1:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.366440][ T5878] Bluetooth: hci1: failed to register connection device [ 49.386970][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 49.386985][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.386997][ T5878] Tainted: [W]=WARN [ 49.387000][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.387005][ T5878] Workqueue: hci0 hci_rx_work [ 49.387019][ T5878] Call trace: [ 49.387022][ T5878] show_stack+0x2c/0x3c (C) [ 49.387036][ T5878] __dump_stack+0x30/0x40 [ 49.387047][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.387057][ T5878] dump_stack+0x1c/0x28 [ 49.387066][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.387077][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.387086][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.387095][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.387102][ T5878] kobject_add+0x110/0x1c8 [ 49.387119][ T5878] device_add+0x394/0x9e0 [ 49.387127][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.387137][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.387146][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.387155][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.387164][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.387172][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.387179][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.387189][ T5878] worker_thread+0x798/0xbd0 [ 49.387197][ T5878] kthread+0x304/0x3d4 [ 49.387205][ T5878] ret_from_fork+0x10/0x20 [ 49.387218][ T5878] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.387230][ T5878] Bluetooth: hci0: failed to register connection device [ 49.391802][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 49.391813][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.391825][ T5878] Tainted: [W]=WARN [ 49.391828][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.391833][ T5878] Workqueue: hci2 hci_rx_work [ 49.391843][ T5878] Call trace: [ 49.391846][ T5878] show_stack+0x2c/0x3c (C) [ 49.391859][ T5878] __dump_stack+0x30/0x40 [ 49.391869][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.391879][ T5878] dump_stack+0x1c/0x28 [ 49.391888][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.391898][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.391908][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.391916][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.391923][ T5878] kobject_add+0x110/0x1c8 [ 49.391930][ T5878] device_add+0x394/0x9e0 [ 49.391937][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.391946][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.391954][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.391963][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.391972][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.391980][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.391987][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.391996][ T5878] worker_thread+0x798/0xbd0 [ 49.392004][ T5878] kthread+0x304/0x3d4 [ 49.392012][ T5878] ret_from_fork+0x10/0x20 [ 49.392024][ T5878] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.392036][ T5878] Bluetooth: hci2: failed to register connection device [ 49.412574][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci4/hci4:0' [ 49.412588][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.412601][ T5878] Tainted: [W]=WARN [ 49.412604][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.412609][ T5878] Workqueue: hci4 hci_rx_work [ 49.412624][ T5878] Call trace: [ 49.412627][ T5878] show_stack+0x2c/0x3c (C) [ 49.412643][ T5878] __dump_stack+0x30/0x40 [ 49.412654][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.412664][ T5878] dump_stack+0x1c/0x28 [ 49.412673][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.412684][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.412694][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.412703][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.412710][ T5878] kobject_add+0x110/0x1c8 [ 49.412717][ T5878] device_add+0x394/0x9e0 [ 49.412725][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.412735][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.412744][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.412752][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.412761][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.412769][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.412776][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.412786][ T5878] worker_thread+0x798/0xbd0 [ 49.412794][ T5878] kthread+0x304/0x3d4 [ 49.412802][ T5878] ret_from_fork+0x10/0x20 [ 49.412815][ T5878] kobject: kobject_add_internal failed for hci4:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.412828][ T5878] Bluetooth: hci4: failed to register connection device [ 49.414248][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci1/hci1:0' [ 49.414260][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.414272][ T5878] Tainted: [W]=WARN [ 49.414275][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.414280][ T5878] Workqueue: hci1 hci_rx_work [ 49.414290][ T5878] Call trace: [ 49.414293][ T5878] show_stack+0x2c/0x3c (C) [ 49.414306][ T5878] __dump_stack+0x30/0x40 [ 49.414316][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.414326][ T5878] dump_stack+0x1c/0x28 [ 49.414335][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.414346][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.414355][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.414363][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.414371][ T5878] kobject_add+0x110/0x1c8 [ 49.414378][ T5878] device_add+0x394/0x9e0 [ 49.414385][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.414394][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.414402][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.414410][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.414420][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.414428][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.414435][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.414444][ T5878] worker_thread+0x798/0xbd0 [ 49.414453][ T5878] kthread+0x304/0x3d4 [ 49.414460][ T5878] ret_from_fork+0x10/0x20 [ 49.414472][ T5878] kobject: kobject_add_internal failed for hci1:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.414483][ T5878] Bluetooth: hci1: failed to register connection device [ 49.426064][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:0' [ 49.426080][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.426092][ T5878] Tainted: [W]=WARN [ 49.426095][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.426100][ T5878] Workqueue: hci3 hci_rx_work [ 49.426119][ T5878] Call trace: [ 49.426122][ T5878] show_stack+0x2c/0x3c (C) [ 49.426138][ T5878] __dump_stack+0x30/0x40 [ 49.426152][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.426163][ T5878] dump_stack+0x1c/0x28 [ 49.426172][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.426184][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.426193][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.426202][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.426210][ T5878] kobject_add+0x110/0x1c8 [ 49.426217][ T5878] device_add+0x394/0x9e0 [ 49.426224][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.426234][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.426243][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.426251][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.426261][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.426269][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.426276][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.426286][ T5878] worker_thread+0x798/0xbd0 [ 49.426294][ T5878] kthread+0x304/0x3d4 [ 49.426302][ T5878] ret_from_fork+0x10/0x20 [ 49.426315][ T5878] kobject: kobject_add_internal failed for hci3:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.426327][ T5878] Bluetooth: hci3: failed to register connection device [ 49.432669][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 49.432684][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.432696][ T5878] Tainted: [W]=WARN [ 49.432699][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.432705][ T5878] Workqueue: hci2 hci_rx_work [ 49.432715][ T5878] Call trace: [ 49.432718][ T5878] show_stack+0x2c/0x3c (C) [ 49.432732][ T5878] __dump_stack+0x30/0x40 [ 49.432742][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.432752][ T5878] dump_stack+0x1c/0x28 [ 49.432761][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.432771][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.432781][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.432789][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.432796][ T5878] kobject_add+0x110/0x1c8 [ 49.432804][ T5878] device_add+0x394/0x9e0 [ 49.432811][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.432820][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.432828][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.432837][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.432846][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.432854][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.432861][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.432871][ T5878] worker_thread+0x798/0xbd0 [ 49.432879][ T5878] kthread+0x304/0x3d4 [ 49.432887][ T5878] ret_from_fork+0x10/0x20 [ 49.432899][ T5878] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.432910][ T5878] Bluetooth: hci2: failed to register connection device [ 49.456946][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 49.456964][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.456978][ T5878] Tainted: [W]=WARN [ 49.456981][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.456987][ T5878] Workqueue: hci0 hci_rx_work [ 49.457001][ T5878] Call trace: [ 49.457004][ T5878] show_stack+0x2c/0x3c (C) [ 49.457019][ T5878] __dump_stack+0x30/0x40 [ 49.457030][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.457039][ T5878] dump_stack+0x1c/0x28 [ 49.457049][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.457060][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.457069][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.457079][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.457086][ T5878] kobject_add+0x110/0x1c8 [ 49.457093][ T5878] device_add+0x394/0x9e0 [ 49.457100][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.457118][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.457127][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.457136][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.457146][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.457155][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.457161][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.457171][ T5878] worker_thread+0x798/0xbd0 [ 49.457179][ T5878] kthread+0x304/0x3d4 [ 49.457187][ T5878] ret_from_fork+0x10/0x20 [ 49.457200][ T5878] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.457212][ T5878] Bluetooth: hci0: failed to register connection device [ 49.463832][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci1/hci1:0' [ 49.463843][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.463854][ T5878] Tainted: [W]=WARN [ 49.463858][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.463862][ T5878] Workqueue: hci1 hci_rx_work [ 49.463872][ T5878] Call trace: [ 49.463875][ T5878] show_stack+0x2c/0x3c (C) [ 49.463887][ T5878] __dump_stack+0x30/0x40 [ 49.463897][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.463907][ T5878] dump_stack+0x1c/0x28 [ 49.463916][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.463926][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.463936][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.463944][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.463951][ T5878] kobject_add+0x110/0x1c8 [ 49.463958][ T5878] device_add+0x394/0x9e0 [ 49.463966][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.463975][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.463983][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.463992][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.464001][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.464009][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.464016][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.464025][ T5878] worker_thread+0x798/0xbd0 [ 49.464034][ T5878] kthread+0x304/0x3d4 [ 49.464041][ T5878] ret_from_fork+0x10/0x20 [ 49.464054][ T5878] kobject: kobject_add_internal failed for hci1:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.464066][ T5878] Bluetooth: hci1: failed to register connection device [ 49.484187][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci4/hci4:0' [ 49.484206][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.484218][ T5878] Tainted: [W]=WARN [ 49.484222][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.484227][ T5878] Workqueue: hci4 hci_rx_work [ 49.484241][ T5878] Call trace: [ 49.484244][ T5878] show_stack+0x2c/0x3c (C) [ 49.484259][ T5878] __dump_stack+0x30/0x40 [ 49.484269][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.484279][ T5878] dump_stack+0x1c/0x28 [ 49.484289][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.484299][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.484309][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.484318][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.484325][ T5878] kobject_add+0x110/0x1c8 [ 49.484332][ T5878] device_add+0x394/0x9e0 [ 49.484340][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.484349][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.484358][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.484366][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.484375][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.484384][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.484391][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.484400][ T5878] worker_thread+0x798/0xbd0 [ 49.484409][ T5878] kthread+0x304/0x3d4 [ 49.484416][ T5878] ret_from_fork+0x10/0x20 [ 49.484430][ T5878] kobject: kobject_add_internal failed for hci4:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.484441][ T5878] Bluetooth: hci4: failed to register connection device [ 49.486323][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 49.486333][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.486345][ T5878] Tainted: [W]=WARN [ 49.486348][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.486353][ T5878] Workqueue: hci2 hci_rx_work [ 49.486363][ T5878] Call trace: [ 49.486365][ T5878] show_stack+0x2c/0x3c (C) [ 49.486377][ T5878] __dump_stack+0x30/0x40 [ 49.486387][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.486397][ T5878] dump_stack+0x1c/0x28 [ 49.486407][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.486416][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.486426][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.486434][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.486441][ T5878] kobject_add+0x110/0x1c8 [ 49.486449][ T5878] device_add+0x394/0x9e0 [ 49.486456][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.486465][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.486474][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.486482][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.486491][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.486500][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.486506][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.486516][ T5878] worker_thread+0x798/0xbd0 [ 49.486524][ T5878] kthread+0x304/0x3d4 [ 49.486532][ T5878] ret_from_fork+0x10/0x20 [ 49.486544][ T5878] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.486555][ T5878] Bluetooth: hci2: failed to register connection device [ 49.503449][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 49.503466][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.503480][ T5878] Tainted: [W]=WARN [ 49.503483][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.503489][ T5878] Workqueue: hci0 hci_rx_work [ 49.503503][ T5878] Call trace: [ 49.503506][ T5878] show_stack+0x2c/0x3c (C) [ 49.503521][ T5878] __dump_stack+0x30/0x40 [ 49.503533][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.503543][ T5878] dump_stack+0x1c/0x28 [ 49.503553][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.503564][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.503574][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.503584][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.503591][ T5878] kobject_add+0x110/0x1c8 [ 49.503598][ T5878] device_add+0x394/0x9e0 [ 49.503606][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.503616][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.503625][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.503633][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.503643][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.503652][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.503659][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.503669][ T5878] worker_thread+0x798/0xbd0 [ 49.503677][ T5878] kthread+0x304/0x3d4 [ 49.503685][ T5878] ret_from_fork+0x10/0x20 [ 49.503697][ T5878] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.503709][ T5878] Bluetooth: hci0: failed to register connection device [ 49.517471][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci1/hci1:0' [ 49.517484][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.517496][ T5878] Tainted: [W]=WARN [ 49.517499][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.517504][ T5878] Workqueue: hci1 hci_rx_work [ 49.517517][ T5878] Call trace: [ 49.517520][ T5878] show_stack+0x2c/0x3c (C) [ 49.517533][ T5878] __dump_stack+0x30/0x40 [ 49.517544][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.517553][ T5878] dump_stack+0x1c/0x28 [ 49.517563][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.517573][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.517583][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.517592][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.517599][ T5878] kobject_add+0x110/0x1c8 [ 49.517606][ T5878] device_add+0x394/0x9e0 [ 49.517613][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.517623][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.517631][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.517640][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.517648][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.517657][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.517664][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.517674][ T5878] worker_thread+0x798/0xbd0 [ 49.517682][ T5878] kthread+0x304/0x3d4 [ 49.517690][ T5878] ret_from_fork+0x10/0x20 [ 49.517702][ T5878] kobject: kobject_add_internal failed for hci1:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.517714][ T5878] Bluetooth: hci1: failed to register connection device [ 49.526159][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 49.526173][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.526190][ T5878] Tainted: [W]=WARN [ 49.526194][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.526200][ T5878] Workqueue: hci2 hci_rx_work [ 49.526210][ T5878] Call trace: [ 49.526213][ T5878] show_stack+0x2c/0x3c (C) [ 49.526227][ T5878] __dump_stack+0x30/0x40 [ 49.526237][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.526247][ T5878] dump_stack+0x1c/0x28 [ 49.526257][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.526267][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.526277][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.526285][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.526293][ T5878] kobject_add+0x110/0x1c8 [ 49.526299][ T5878] device_add+0x394/0x9e0 [ 49.526307][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.526316][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.526325][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.526333][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.526342][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.526351][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.526358][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.526367][ T5878] worker_thread+0x798/0xbd0 [ 49.526375][ T5878] kthread+0x304/0x3d4 [ 49.526383][ T5878] ret_from_fork+0x10/0x20 [ 49.526395][ T5878] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.526407][ T5878] Bluetooth: hci2: failed to register connection device [ 49.533825][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:0' [ 49.533837][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.533848][ T5878] Tainted: [W]=WARN [ 49.533851][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.533856][ T5878] Workqueue: hci3 hci_rx_work [ 49.533867][ T5878] Call trace: [ 49.533869][ T5878] show_stack+0x2c/0x3c (C) [ 49.533882][ T5878] __dump_stack+0x30/0x40 [ 49.533893][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.533902][ T5878] dump_stack+0x1c/0x28 [ 49.533912][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.533922][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.533932][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.533941][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.533948][ T5878] kobject_add+0x110/0x1c8 [ 49.533955][ T5878] device_add+0x394/0x9e0 [ 49.533963][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.533972][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.533980][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.533989][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.533998][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.534007][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.534013][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.534023][ T5878] worker_thread+0x798/0xbd0 [ 49.534031][ T5878] kthread+0x304/0x3d4 [ 49.534039][ T5878] ret_from_fork+0x10/0x20 [ 49.534052][ T5878] kobject: kobject_add_internal failed for hci3:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.534063][ T5878] Bluetooth: hci3: failed to register connection device [ 49.555536][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 49.555551][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.555563][ T5878] Tainted: [W]=WARN [ 49.555566][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.555571][ T5878] Workqueue: hci0 hci_rx_work [ 49.555584][ T5878] Call trace: [ 49.555587][ T5878] show_stack+0x2c/0x3c (C) [ 49.555602][ T5878] __dump_stack+0x30/0x40 [ 49.555613][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.555623][ T5878] dump_stack+0x1c/0x28 [ 49.555632][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.555644][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.555653][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.555663][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.555670][ T5878] kobject_add+0x110/0x1c8 [ 49.555677][ T5878] device_add+0x394/0x9e0 [ 49.555685][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.555695][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.555704][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.555713][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.555723][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.555731][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.555738][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.555748][ T5878] worker_thread+0x798/0xbd0 [ 49.555756][ T5878] kthread+0x304/0x3d4 [ 49.555764][ T5878] ret_from_fork+0x10/0x20 [ 49.555777][ T5878] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.555789][ T5878] Bluetooth: hci0: failed to register connection device [ 49.566922][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci1/hci1:0' [ 49.566935][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.566947][ T5878] Tainted: [W]=WARN [ 49.566950][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.566955][ T5878] Workqueue: hci1 hci_rx_work [ 49.566967][ T5878] Call trace: [ 49.566970][ T5878] show_stack+0x2c/0x3c (C) [ 49.566984][ T5878] __dump_stack+0x30/0x40 [ 49.566994][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.567004][ T5878] dump_stack+0x1c/0x28 [ 49.567013][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.567023][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.567033][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.567042][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.567049][ T5878] kobject_add+0x110/0x1c8 [ 49.567056][ T5878] device_add+0x394/0x9e0 [ 49.567064][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.567073][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.567082][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.567090][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.567100][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.567116][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.567124][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.567133][ T5878] worker_thread+0x798/0xbd0 [ 49.567142][ T5878] kthread+0x304/0x3d4 [ 49.567150][ T5878] ret_from_fork+0x10/0x20 [ 49.567164][ T5878] kobject: kobject_add_internal failed for hci1:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.567176][ T5878] Bluetooth: hci1: failed to register connection device [ 49.568994][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 49.569004][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.569015][ T5878] Tainted: [W]=WARN [ 49.569018][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.569023][ T5878] Workqueue: hci2 hci_rx_work [ 49.569032][ T5878] Call trace: [ 49.569035][ T5878] show_stack+0x2c/0x3c (C) [ 49.569047][ T5878] __dump_stack+0x30/0x40 [ 49.569057][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.569067][ T5878] dump_stack+0x1c/0x28 [ 49.569076][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.569086][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.569095][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.569103][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.569117][ T5878] kobject_add+0x110/0x1c8 [ 49.569125][ T5878] device_add+0x394/0x9e0 [ 49.569132][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.569142][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.569150][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.569159][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.569168][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.569177][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.569183][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.569192][ T5878] worker_thread+0x798/0xbd0 [ 49.569201][ T5878] kthread+0x304/0x3d4 [ 49.569209][ T5878] ret_from_fork+0x10/0x20 [ 49.569221][ T5878] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.569231][ T5878] Bluetooth: hci2: failed to register connection device [ 49.582570][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:0' [ 49.582586][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.582598][ T5878] Tainted: [W]=WARN [ 49.582602][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.582607][ T5878] Workqueue: hci3 hci_rx_work [ 49.582622][ T5878] Call trace: [ 49.582625][ T5878] show_stack+0x2c/0x3c (C) [ 49.582641][ T5878] __dump_stack+0x30/0x40 [ 49.582652][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.582662][ T5878] dump_stack+0x1c/0x28 [ 49.582672][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.582683][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.582693][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.582702][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.582709][ T5878] kobject_add+0x110/0x1c8 [ 49.582716][ T5878] device_add+0x394/0x9e0 [ 49.582724][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.582734][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.582742][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.582750][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.582759][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.582768][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.582775][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.582785][ T5878] worker_thread+0x798/0xbd0 [ 49.582793][ T5878] kthread+0x304/0x3d4 [ 49.582801][ T5878] ret_from_fork+0x10/0x20 [ 49.582814][ T5878] kobject: kobject_add_internal failed for hci3:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.582825][ T5878] Bluetooth: hci3: failed to register connection device [ 49.604141][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci4/hci4:0' [ 49.604158][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.604173][ T5878] Tainted: [W]=WARN [ 49.604177][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.604182][ T5878] Workqueue: hci4 hci_rx_work [ 49.604196][ T5878] Call trace: [ 49.604200][ T5878] show_stack+0x2c/0x3c (C) [ 49.604215][ T5878] __dump_stack+0x30/0x40 [ 49.604225][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.604235][ T5878] dump_stack+0x1c/0x28 [ 49.604245][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.604256][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.604265][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.604274][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.604282][ T5878] kobject_add+0x110/0x1c8 [ 49.604288][ T5878] device_add+0x394/0x9e0 [ 49.604296][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.604306][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.604315][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.604324][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.604333][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.604341][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.604348][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.604361][ T5878] worker_thread+0x798/0xbd0 [ 49.604370][ T5878] kthread+0x304/0x3d4 [ 49.604378][ T5878] ret_from_fork+0x10/0x20 [ 49.604406][ T5878] kobject: kobject_add_internal failed for hci4:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.604420][ T5878] Bluetooth: hci4: failed to register connection device [ 49.614894][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci1/hci1:0' [ 49.614909][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.614921][ T5878] Tainted: [W]=WARN [ 49.614924][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.614929][ T5878] Workqueue: hci1 hci_rx_work [ 49.614942][ T5878] Call trace: [ 49.614945][ T5878] show_stack+0x2c/0x3c (C) [ 49.614960][ T5878] __dump_stack+0x30/0x40 [ 49.614971][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.614981][ T5878] dump_stack+0x1c/0x28 [ 49.614990][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.615001][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.615011][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.615020][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.615027][ T5878] kobject_add+0x110/0x1c8 [ 49.615034][ T5878] device_add+0x394/0x9e0 [ 49.615042][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.615052][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.615061][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.615069][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.615079][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.615088][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.615094][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.615104][ T5878] worker_thread+0x798/0xbd0 [ 49.615121][ T5878] kthread+0x304/0x3d4 [ 49.615129][ T5878] ret_from_fork+0x10/0x20 [ 49.615144][ T5878] kobject: kobject_add_internal failed for hci1:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.615158][ T5878] Bluetooth: hci1: failed to register connection device [ 49.622328][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 49.622340][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.622351][ T5878] Tainted: [W]=WARN [ 49.622355][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.622360][ T5878] Workqueue: hci2 hci_rx_work [ 49.622370][ T5878] Call trace: [ 49.622373][ T5878] show_stack+0x2c/0x3c (C) [ 49.622385][ T5878] __dump_stack+0x30/0x40 [ 49.622395][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.622405][ T5878] dump_stack+0x1c/0x28 [ 49.622414][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.622425][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.622434][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.622443][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.622450][ T5878] kobject_add+0x110/0x1c8 [ 49.622457][ T5878] device_add+0x394/0x9e0 [ 49.622464][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.622473][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.622482][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.622490][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.622499][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.622508][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.622515][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.622524][ T5878] worker_thread+0x798/0xbd0 [ 49.622532][ T5878] kthread+0x304/0x3d4 [ 49.622540][ T5878] ret_from_fork+0x10/0x20 [ 49.622552][ T5878] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.622563][ T5878] Bluetooth: hci2: failed to register connection device [ 49.643119][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 49.643137][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.643150][ T5878] Tainted: [W]=WARN [ 49.643154][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.643160][ T5878] Workqueue: hci0 hci_rx_work [ 49.643174][ T5878] Call trace: [ 49.643177][ T5878] show_stack+0x2c/0x3c (C) [ 49.643192][ T5878] __dump_stack+0x30/0x40 [ 49.643203][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.643213][ T5878] dump_stack+0x1c/0x28 [ 49.643223][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.643234][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.643244][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.643253][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.643260][ T5878] kobject_add+0x110/0x1c8 [ 49.643267][ T5878] device_add+0x394/0x9e0 [ 49.643275][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.643285][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.643294][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.643303][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.643313][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.643321][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.643328][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.643338][ T5878] worker_thread+0x798/0xbd0 [ 49.643346][ T5878] kthread+0x304/0x3d4 [ 49.643354][ T5878] ret_from_fork+0x10/0x20 [ 49.643366][ T5878] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.643378][ T5878] Bluetooth: hci0: failed to register connection device [ 49.648069][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:0' [ 49.648080][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.648092][ T5878] Tainted: [W]=WARN [ 49.648095][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.648101][ T5878] Workqueue: hci3 hci_rx_work [ 49.648115][ T5878] Call trace: [ 49.648118][ T5878] show_stack+0x2c/0x3c (C) [ 49.648131][ T5878] __dump_stack+0x30/0x40 [ 49.648143][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.648153][ T5878] dump_stack+0x1c/0x28 [ 49.648162][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.648173][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.648182][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.648190][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.648197][ T5878] kobject_add+0x110/0x1c8 [ 49.648204][ T5878] device_add+0x394/0x9e0 [ 49.648212][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.648221][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.648229][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.648238][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.648247][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.648256][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.648262][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.648271][ T5878] worker_thread+0x798/0xbd0 [ 49.648280][ T5878] kthread+0x304/0x3d4 [ 49.648287][ T5878] ret_from_fork+0x10/0x20 [ 49.648299][ T5878] kobject: kobject_add_internal failed for hci3:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.648311][ T5878] Bluetooth: hci3: failed to register connection device [ 49.667661][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci1/hci1:0' [ 49.667676][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.667688][ T5878] Tainted: [W]=WARN [ 49.667692][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.667697][ T5878] Workqueue: hci1 hci_rx_work [ 49.667712][ T5878] Call trace: [ 49.667715][ T5878] show_stack+0x2c/0x3c (C) [ 49.667731][ T5878] __dump_stack+0x30/0x40 [ 49.667742][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.667752][ T5878] dump_stack+0x1c/0x28 [ 49.667761][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.667772][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.667782][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.667791][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.667798][ T5878] kobject_add+0x110/0x1c8 [ 49.667805][ T5878] device_add+0x394/0x9e0 [ 49.667813][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.667823][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.667831][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.667840][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.667849][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.667858][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.667865][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.667874][ T5878] worker_thread+0x798/0xbd0 [ 49.667883][ T5878] kthread+0x304/0x3d4 [ 49.667890][ T5878] ret_from_fork+0x10/0x20 [ 49.667903][ T5878] kobject: kobject_add_internal failed for hci1:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.667915][ T5878] Bluetooth: hci1: failed to register connection device [ 49.673140][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 49.673154][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.673172][ T5878] Tainted: [W]=WARN [ 49.673176][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.673181][ T5878] Workqueue: hci2 hci_rx_work [ 49.673192][ T5878] Call trace: [ 49.673196][ T5878] show_stack+0x2c/0x3c (C) [ 49.673210][ T5878] __dump_stack+0x30/0x40 [ 49.673221][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.673231][ T5878] dump_stack+0x1c/0x28 [ 49.673240][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.673250][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.673260][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.673268][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.673275][ T5878] kobject_add+0x110/0x1c8 [ 49.673283][ T5878] device_add+0x394/0x9e0 [ 49.673290][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.673299][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.673308][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.673317][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.673326][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.673335][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.673341][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.673350][ T5878] worker_thread+0x798/0xbd0 [ 49.673359][ T5878] kthread+0x304/0x3d4 [ 49.673366][ T5878] ret_from_fork+0x10/0x20 [ 49.673378][ T5878] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.673390][ T5878] Bluetooth: hci2: failed to register connection device [ 49.674949][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 49.674959][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.674970][ T5878] Tainted: [W]=WARN [ 49.674974][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.674979][ T5878] Workqueue: hci0 hci_rx_work [ 49.674988][ T5878] Call trace: [ 49.674991][ T5878] show_stack+0x2c/0x3c (C) [ 49.675003][ T5878] __dump_stack+0x30/0x40 [ 49.675014][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.675024][ T5878] dump_stack+0x1c/0x28 [ 49.675033][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.675043][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.675053][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.675062][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.675069][ T5878] kobject_add+0x110/0x1c8 [ 49.675076][ T5878] device_add+0x394/0x9e0 [ 49.675083][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.675093][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.675102][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.675117][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.675127][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.675136][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.675144][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.675153][ T5878] worker_thread+0x798/0xbd0 [ 49.675162][ T5878] kthread+0x304/0x3d4 [ 49.675170][ T5878] ret_from_fork+0x10/0x20 [ 49.675182][ T5878] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.675193][ T5878] Bluetooth: hci0: failed to register connection device [ 49.682091][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci4/hci4:0' [ 49.682102][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.682118][ T5878] Tainted: [W]=WARN [ 49.682122][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.682129][ T5878] Workqueue: hci4 hci_rx_work [ 49.682143][ T5878] Call trace: [ 49.682146][ T5878] show_stack+0x2c/0x3c (C) [ 49.682159][ T5878] __dump_stack+0x30/0x40 [ 49.682170][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.682180][ T5878] dump_stack+0x1c/0x28 [ 49.682189][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.682199][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.682209][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.682218][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.682225][ T5878] kobject_add+0x110/0x1c8 [ 49.682232][ T5878] device_add+0x394/0x9e0 [ 49.682239][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.682248][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.682257][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.682265][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.682274][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.682283][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.682290][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.682299][ T5878] worker_thread+0x798/0xbd0 [ 49.682308][ T5878] kthread+0x304/0x3d4 [ 49.682315][ T5878] ret_from_fork+0x10/0x20 [ 49.682938][ T5878] kobject: kobject_add_internal failed for hci4:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.682950][ T5878] Bluetooth: hci4: failed to register connection device [ 49.698889][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:0' [ 49.698903][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.698915][ T5878] Tainted: [W]=WARN [ 49.698918][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.698922][ T5878] Workqueue: hci3 hci_rx_work [ 49.698935][ T5878] Call trace: [ 49.698938][ T5878] show_stack+0x2c/0x3c (C) [ 49.698953][ T5878] __dump_stack+0x30/0x40 [ 49.698963][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.698973][ T5878] dump_stack+0x1c/0x28 [ 49.698982][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.698993][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.699003][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.699012][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.699019][ T5878] kobject_add+0x110/0x1c8 [ 49.699026][ T5878] device_add+0x394/0x9e0 [ 49.699034][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.699044][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.699052][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.699061][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.699070][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.699079][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.699086][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.699095][ T5878] worker_thread+0x798/0xbd0 [ 49.699104][ T5878] kthread+0x304/0x3d4 [ 49.699117][ T5878] ret_from_fork+0x10/0x20 [ 49.699133][ T5878] kobject: kobject_add_internal failed for hci3:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.699149][ T5878] Bluetooth: hci3: failed to register connection device [ 49.719380][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci1/hci1:0' [ 49.719397][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.719409][ T5878] Tainted: [W]=WARN [ 49.719413][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.719419][ T5878] Workqueue: hci1 hci_rx_work [ 49.719434][ T5878] Call trace: [ 49.719438][ T5878] show_stack+0x2c/0x3c (C) [ 49.719453][ T5878] __dump_stack+0x30/0x40 [ 49.719464][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.719474][ T5878] dump_stack+0x1c/0x28 [ 49.719484][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.719494][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.719504][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.719513][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.719520][ T5878] kobject_add+0x110/0x1c8 [ 49.719527][ T5878] device_add+0x394/0x9e0 [ 49.719534][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.719545][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.719553][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.719562][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.719571][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.719580][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.719586][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.719596][ T5878] worker_thread+0x798/0xbd0 [ 49.719604][ T5878] kthread+0x304/0x3d4 [ 49.719612][ T5878] ret_from_fork+0x10/0x20 [ 49.719624][ T5878] kobject: kobject_add_internal failed for hci1:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.719656][ T5878] Bluetooth: hci1: failed to register connection device [ 49.726745][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 49.726759][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.726771][ T5878] Tainted: [W]=WARN [ 49.726774][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.726779][ T5878] Workqueue: hci0 hci_rx_work [ 49.726791][ T5878] Call trace: [ 49.726793][ T5878] show_stack+0x2c/0x3c (C) [ 49.726808][ T5878] __dump_stack+0x30/0x40 [ 49.726818][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.726828][ T5878] dump_stack+0x1c/0x28 [ 49.726837][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.726847][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.726857][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.726865][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.726872][ T5878] kobject_add+0x110/0x1c8 [ 49.726879][ T5878] device_add+0x394/0x9e0 [ 49.726886][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.726896][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.726904][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.726913][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.726922][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.726931][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.726938][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.726947][ T5878] worker_thread+0x798/0xbd0 [ 49.726956][ T5878] kthread+0x304/0x3d4 [ 49.726963][ T5878] ret_from_fork+0x10/0x20 [ 49.726975][ T5878] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.726987][ T5878] Bluetooth: hci0: failed to register connection device [ 49.732717][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci4/hci4:0' [ 49.732728][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.732740][ T5878] Tainted: [W]=WARN [ 49.732743][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.732748][ T5878] Workqueue: hci4 hci_rx_work [ 49.732758][ T5878] Call trace: [ 49.732760][ T5878] show_stack+0x2c/0x3c (C) [ 49.732773][ T5878] __dump_stack+0x30/0x40 [ 49.732783][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.732793][ T5878] dump_stack+0x1c/0x28 [ 49.732802][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.732812][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.732822][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.732830][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.732838][ T5878] kobject_add+0x110/0x1c8 [ 49.732844][ T5878] device_add+0x394/0x9e0 [ 49.732852][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.732861][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.732870][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.732878][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.732887][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.732896][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.732903][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.732912][ T5878] worker_thread+0x798/0xbd0 [ 49.732921][ T5878] kthread+0x304/0x3d4 [ 49.732928][ T5878] ret_from_fork+0x10/0x20 [ 49.732941][ T5878] kobject: kobject_add_internal failed for hci4:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.732952][ T5878] Bluetooth: hci4: failed to register connection device [ 49.752085][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 49.752100][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.752116][ T5878] Tainted: [W]=WARN [ 49.752120][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.752125][ T5878] Workqueue: hci2 hci_rx_work [ 49.752141][ T5878] Call trace: [ 49.752145][ T5878] show_stack+0x2c/0x3c (C) [ 49.752160][ T5878] __dump_stack+0x30/0x40 [ 49.752171][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.752181][ T5878] dump_stack+0x1c/0x28 [ 49.752190][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.752201][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.752211][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.752220][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.752227][ T5878] kobject_add+0x110/0x1c8 [ 49.752234][ T5878] device_add+0x394/0x9e0 [ 49.752242][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.752252][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.752260][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.752268][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.752278][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.752286][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.752293][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.752303][ T5878] worker_thread+0x798/0xbd0 [ 49.752311][ T5878] kthread+0x304/0x3d4 [ 49.752319][ T5878] ret_from_fork+0x10/0x20 [ 49.752331][ T5878] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.752343][ T5878] Bluetooth: hci2: failed to register connection device [ 49.753938][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:0' [ 49.753948][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.753959][ T5878] Tainted: [W]=WARN [ 49.753963][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.753967][ T5878] Workqueue: hci3 hci_rx_work [ 49.753977][ T5878] Call trace: [ 49.753979][ T5878] show_stack+0x2c/0x3c (C) [ 49.753991][ T5878] __dump_stack+0x30/0x40 [ 49.754001][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.754011][ T5878] dump_stack+0x1c/0x28 [ 49.754021][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.754031][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.754041][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.754049][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.754056][ T5878] kobject_add+0x110/0x1c8 [ 49.754063][ T5878] device_add+0x394/0x9e0 [ 49.754070][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.754080][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.754088][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.754096][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.754106][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.754121][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.754128][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.754137][ T5878] worker_thread+0x798/0xbd0 [ 49.754146][ T5878] kthread+0x304/0x3d4 [ 49.754154][ T5878] ret_from_fork+0x10/0x20 [ 49.754167][ T5878] kobject: kobject_add_internal failed for hci3:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.754177][ T5878] Bluetooth: hci3: failed to register connection device [ 49.768517][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 49.768532][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 49.768543][ T5878] Tainted: [W]=WARN [ 49.768546][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.768551][ T5878] Workqueue: hci0 hci_rx_work [ 49.768564][ T5878] Call trace: [ 49.768567][ T5878] show_stack+0x2c/0x3c (C) [ 49.768581][ T5878] __dump_stack+0x30/0x40 [ 49.768591][ T5878] dump_stack_lvl+0xd8/0x12c [ 49.768601][ T5878] dump_stack+0x1c/0x28 [ 49.768611][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 49.768621][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 49.768631][ T5878] kobject_add_internal+0x290/0x6f0 [ 49.768640][ T5878] kobject_add_varg+0x9c/0xe8 [ 49.768647][ T5878] kobject_add+0x110/0x1c8 [ 49.768653][ T5878] device_add+0x394/0x9e0 [ 49.768661][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.768671][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 49.768679][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.768687][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 49.768697][ T5878] hci_event_packet+0x4c0/0x9c8 [ 49.768705][ T5878] hci_rx_work+0x2f4/0xd78 [ 49.768712][ T5878] process_scheduled_works+0x788/0x10b8 [ 49.768721][ T5878] worker_thread+0x798/0xbd0 [ 49.768730][ T5878] kthread+0x304/0x3d4 [ 49.768737][ T5878] ret_from_fork+0x10/0x20 [ 49.768750][ T5878] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.768761][ T5878] Bluetooth: hci0: failed to register connection device [ 49.771046][ T5878] ------------[ cut here ]------------ [ 49.771054][ T5878] WARNING: net/bluetooth/hci_conn.c:631 at hci_conn_timeout+0xfc/0x20c, CPU#1: kworker/u9:6/5878 [ 49.820468][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci1/hci1:0' [ 49.820504][ T5914] CPU: 0 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 49.820522][ T5914] Tainted: [W]=WARN [ 49.820526][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.820531][ T5914] Workqueue: hci1 hci_rx_work [ 49.820545][ T5914] Call trace: [ 49.820548][ T5914] show_stack+0x2c/0x3c (C) [ 49.820563][ T5914] __dump_stack+0x30/0x40 [ 49.820573][ T5914] dump_stack_lvl+0xd8/0x12c [ 49.820583][ T5914] dump_stack+0x1c/0x28 [ 49.820592][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 49.820603][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 49.820613][ T5914] kobject_add_internal+0x290/0x6f0 [ 49.820622][ T5914] kobject_add_varg+0x9c/0xe8 [ 49.820629][ T5914] kobject_add+0x110/0x1c8 [ 49.820636][ T5914] device_add+0x394/0x9e0 [ 49.820644][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.820653][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 49.820662][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.820670][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 49.820680][ T5914] hci_event_packet+0x4c0/0x9c8 [ 49.820688][ T5914] hci_rx_work+0x2f4/0xd78 [ 49.820695][ T5914] process_scheduled_works+0x788/0x10b8 [ 49.820704][ T5914] worker_thread+0x798/0xbd0 [ 49.820713][ T5914] kthread+0x304/0x3d4 [ 49.820720][ T5914] ret_from_fork+0x10/0x20 [ 49.820737][ T5914] kobject: kobject_add_internal failed for hci1:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.820753][ T5914] Bluetooth: hci1: failed to register connection device [ 49.822455][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci4/hci4:0' [ 49.822477][ T5914] CPU: 0 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 49.822491][ T5914] Tainted: [W]=WARN [ 49.822494][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.822499][ T5914] Workqueue: hci4 hci_rx_work [ 49.822509][ T5914] Call trace: [ 49.822512][ T5914] show_stack+0x2c/0x3c (C) [ 49.822524][ T5914] __dump_stack+0x30/0x40 [ 49.822535][ T5914] dump_stack_lvl+0xd8/0x12c [ 49.822544][ T5914] dump_stack+0x1c/0x28 [ 49.822554][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 49.822564][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 49.822574][ T5914] kobject_add_internal+0x290/0x6f0 [ 49.822582][ T5914] kobject_add_varg+0x9c/0xe8 [ 49.822589][ T5914] kobject_add+0x110/0x1c8 [ 49.822596][ T5914] device_add+0x394/0x9e0 [ 49.822604][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.822613][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 49.822622][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.822630][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 49.822639][ T5914] hci_event_packet+0x4c0/0x9c8 [ 49.822648][ T5914] hci_rx_work+0x2f4/0xd78 [ 49.822655][ T5914] process_scheduled_works+0x788/0x10b8 [ 49.822664][ T5914] worker_thread+0x798/0xbd0 [ 49.822672][ T5914] kthread+0x304/0x3d4 [ 49.822680][ T5914] ret_from_fork+0x10/0x20 [ 49.822695][ T5914] kobject: kobject_add_internal failed for hci4:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.822710][ T5914] Bluetooth: hci4: failed to register connection device [ 49.838904][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:0' [ 49.839255][ T5914] CPU: 0 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 49.839276][ T5914] Tainted: [W]=WARN [ 49.839280][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.839286][ T5914] Workqueue: hci3 hci_rx_work [ 49.839300][ T5914] Call trace: [ 49.839303][ T5914] show_stack+0x2c/0x3c (C) [ 49.839318][ T5914] __dump_stack+0x30/0x40 [ 49.839328][ T5914] dump_stack_lvl+0xd8/0x12c [ 49.839339][ T5914] dump_stack+0x1c/0x28 [ 49.839348][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 49.839359][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 49.839368][ T5914] kobject_add_internal+0x290/0x6f0 [ 49.839377][ T5914] kobject_add_varg+0x9c/0xe8 [ 49.839384][ T5914] kobject_add+0x110/0x1c8 [ 49.839391][ T5914] device_add+0x394/0x9e0 [ 49.839399][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.839409][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 49.839418][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.839426][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 49.839435][ T5914] hci_event_packet+0x4c0/0x9c8 [ 49.839444][ T5914] hci_rx_work+0x2f4/0xd78 [ 49.839451][ T5914] process_scheduled_works+0x788/0x10b8 [ 49.839460][ T5914] worker_thread+0x798/0xbd0 [ 49.839469][ T5914] kthread+0x304/0x3d4 [ 49.839477][ T5914] ret_from_fork+0x10/0x20 [ 49.839508][ T5914] kobject: kobject_add_internal failed for hci3:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.839534][ T5914] Bluetooth: hci3: failed to register connection device [ 49.899633][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 49.899681][ T5914] CPU: 0 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 49.899695][ T5914] Tainted: [W]=WARN [ 49.899699][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.899703][ T5914] Workqueue: hci0 hci_rx_work [ 49.899715][ T5914] Call trace: [ 49.899718][ T5914] show_stack+0x2c/0x3c (C) [ 49.899733][ T5914] __dump_stack+0x30/0x40 [ 49.899743][ T5914] dump_stack_lvl+0xd8/0x12c [ 49.899753][ T5914] dump_stack+0x1c/0x28 [ 49.899763][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 49.899774][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 49.899783][ T5914] kobject_add_internal+0x290/0x6f0 [ 49.899792][ T5914] kobject_add_varg+0x9c/0xe8 [ 49.899800][ T5914] kobject_add+0x110/0x1c8 [ 49.899806][ T5914] device_add+0x394/0x9e0 [ 49.899814][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.899824][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 49.899832][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.899841][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 49.899850][ T5914] hci_event_packet+0x4c0/0x9c8 [ 49.899859][ T5914] hci_rx_work+0x2f4/0xd78 [ 49.899866][ T5914] process_scheduled_works+0x788/0x10b8 [ 49.899875][ T5914] worker_thread+0x798/0xbd0 [ 49.899884][ T5914] kthread+0x304/0x3d4 [ 49.899892][ T5914] ret_from_fork+0x10/0x20 [ 49.899926][ T5914] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.899953][ T5914] Bluetooth: hci0: failed to register connection device [ 49.901994][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci1/hci1:0' [ 49.902335][ T5914] CPU: 0 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 49.902351][ T5914] Tainted: [W]=WARN [ 49.902354][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.902360][ T5914] Workqueue: hci1 hci_rx_work [ 49.902370][ T5914] Call trace: [ 49.902372][ T5914] show_stack+0x2c/0x3c (C) [ 49.902385][ T5914] __dump_stack+0x30/0x40 [ 49.902395][ T5914] dump_stack_lvl+0xd8/0x12c [ 49.902405][ T5914] dump_stack+0x1c/0x28 [ 49.902415][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 49.902425][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 49.902435][ T5914] kobject_add_internal+0x290/0x6f0 [ 49.902443][ T5914] kobject_add_varg+0x9c/0xe8 [ 49.902451][ T5914] kobject_add+0x110/0x1c8 [ 49.902457][ T5914] device_add+0x394/0x9e0 [ 49.902464][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.902474][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 49.902483][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.902491][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 49.902500][ T5914] hci_event_packet+0x4c0/0x9c8 [ 49.902509][ T5914] hci_rx_work+0x2f4/0xd78 [ 49.902516][ T5914] process_scheduled_works+0x788/0x10b8 [ 49.902525][ T5914] worker_thread+0x798/0xbd0 [ 49.902534][ T5914] kthread+0x304/0x3d4 [ 49.902542][ T5914] ret_from_fork+0x10/0x20 [ 49.902658][ T5914] kobject: kobject_add_internal failed for hci1:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.902686][ T5914] Bluetooth: hci1: failed to register connection device [ 49.907319][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci4/hci4:0' [ 49.907579][ T5914] CPU: 0 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 49.907596][ T5914] Tainted: [W]=WARN [ 49.907600][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.907605][ T5914] Workqueue: hci4 hci_rx_work [ 49.907616][ T5914] Call trace: [ 49.907619][ T5914] show_stack+0x2c/0x3c (C) [ 49.907634][ T5914] __dump_stack+0x30/0x40 [ 49.907645][ T5914] dump_stack_lvl+0xd8/0x12c [ 49.907655][ T5914] dump_stack+0x1c/0x28 [ 49.907665][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 49.907674][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 49.907684][ T5914] kobject_add_internal+0x290/0x6f0 [ 49.907693][ T5914] kobject_add_varg+0x9c/0xe8 [ 49.907700][ T5914] kobject_add+0x110/0x1c8 [ 49.907707][ T5914] device_add+0x394/0x9e0 [ 49.907714][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.907724][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 49.907732][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.907740][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 49.907749][ T5914] hci_event_packet+0x4c0/0x9c8 [ 49.907758][ T5914] hci_rx_work+0x2f4/0xd78 [ 49.907765][ T5914] process_scheduled_works+0x788/0x10b8 [ 49.907774][ T5914] worker_thread+0x798/0xbd0 [ 49.907783][ T5914] kthread+0x304/0x3d4 [ 49.907791][ T5914] ret_from_fork+0x10/0x20 [ 49.907899][ T5914] kobject: kobject_add_internal failed for hci4:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.907928][ T5914] Bluetooth: hci4: failed to register connection device [ 49.921835][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:0' [ 49.921879][ T5914] CPU: 0 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 49.921893][ T5914] Tainted: [W]=WARN [ 49.921897][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.921902][ T5914] Workqueue: hci3 hci_rx_work [ 49.921915][ T5914] Call trace: [ 49.921919][ T5914] show_stack+0x2c/0x3c (C) [ 49.921934][ T5914] __dump_stack+0x30/0x40 [ 49.921944][ T5914] dump_stack_lvl+0xd8/0x12c [ 49.921954][ T5914] dump_stack+0x1c/0x28 [ 49.921964][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 49.921977][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 49.921987][ T5914] kobject_add_internal+0x290/0x6f0 [ 49.921997][ T5914] kobject_add_varg+0x9c/0xe8 [ 49.922004][ T5914] kobject_add+0x110/0x1c8 [ 49.922011][ T5914] device_add+0x394/0x9e0 [ 49.922019][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.922029][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 49.922038][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.922046][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 49.922056][ T5914] hci_event_packet+0x4c0/0x9c8 [ 49.922065][ T5914] hci_rx_work+0x2f4/0xd78 [ 49.922072][ T5914] process_scheduled_works+0x788/0x10b8 [ 49.922082][ T5914] worker_thread+0x798/0xbd0 [ 49.922090][ T5914] kthread+0x304/0x3d4 [ 49.922104][ T5914] ret_from_fork+0x10/0x20 [ 49.922150][ T5914] kobject: kobject_add_internal failed for hci3:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.922175][ T5914] Bluetooth: hci3: failed to register connection device [ 52.085627][ T5878] Modules linked in: [ 52.086287][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 52.088035][ T5878] Tainted: [W]=WARN [ 52.088683][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.090378][ T5878] Workqueue: hci2 hci_conn_timeout [ 52.091270][ T5878] pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) [ 52.092650][ T5878] pc : hci_conn_timeout+0xfc/0x20c [ 52.093591][ T5878] lr : hci_conn_timeout+0xfc/0x20c [ 52.094488][ T5878] sp : ffff800096f47b20 [ 52.095176][ T5878] x29: ffff800096f47b20 x28: 1fffe0001a951090 x27: 0000000000000000 [ 52.096529][ T5878] x26: ffff0000c1b7b558 x25: ffff0000db6e4a40 x24: 1fffe0001c15a581 [ 52.097853][ T5878] x23: ffff0000d4a88000 x22: dfff800000000000 x21: 00000000ffffffff [ 52.099280][ T5878] x20: ffff0000db6e4a40 x19: ffff0000db6e4000 x18: 00000000ffffffff [ 52.100649][ T5878] x17: ffff80008a791000 x16: 0000000000000002 x15: ffff80008a31ada0 [ 52.102005][ T5878] x14: ffff80008a590e28 x13: 0000000000000001 x12: 0000000000000000 [ 52.103299][ T5878] x11: 0000000000000000 x10: ffff60001b6dc803 x9 : 0000000000000000 [ 52.104656][ T5878] x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000 [ 52.106046][ T5878] x5 : ffff80008a7af5c8 x4 : 0000000000000008 x3 : ffff800085b2ea58 [ 52.107517][ T5878] x2 : 00000000ffffffff x1 : ffff0000d4a88000 x0 : 0000000000000000 [ 52.109036][ T5878] Call trace: [ 52.109644][ T5878] hci_conn_timeout+0xfc/0x20c (P) [ 52.110512][ T5878] process_scheduled_works+0x788/0x10b8 [ 52.111376][ T5878] worker_thread+0x798/0xbd0 [ 52.112066][ T5878] kthread+0x304/0x3d4 [ 52.112751][ T5878] ret_from_fork+0x10/0x20 [ 52.113519][ T5878] irq event stamp: 22806 [ 52.114217][ T5878] hardirqs last enabled at (22805): [] _raw_spin_unlock_irq+0x30/0x80 [ 52.115956][ T5878] hardirqs last disabled at (22806): [] el1_brk64+0x20/0x54 [ 52.117480][ T5878] softirqs last enabled at (22716): [] __alloc_skb+0x1c0/0x610 [ 52.119056][ T5878] softirqs last disabled at (22714): [] __alloc_skb+0x1a8/0x610 [ 52.120738][ T5878] ---[ end trace 0000000000000000 ]--- [ 52.123625][ T5914] Bluetooth: hci1: command 0x2016 tx timeout [ 52.124873][ T5914] Bluetooth: hci0: command 0x041b tx timeout [ 52.126086][ T5914] Bluetooth: hci4: command 0x2016 tx timeout [ 52.127207][ T5914] Bluetooth: hci3: command 0x2016 tx timeout [ 52.142629][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 52.142670][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 52.142690][ T5878] Tainted: [W]=WARN [ 52.142694][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.142699][ T5878] Workqueue: hci2 hci_rx_work [ 52.142713][ T5878] Call trace: [ 52.142716][ T5878] show_stack+0x2c/0x3c (C) [ 52.142732][ T5878] __dump_stack+0x30/0x40 [ 52.142742][ T5878] dump_stack_lvl+0xd8/0x12c [ 52.142752][ T5878] dump_stack+0x1c/0x28 [ 52.142762][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 52.142772][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 52.142782][ T5878] kobject_add_internal+0x290/0x6f0 [ 52.142791][ T5878] kobject_add_varg+0x9c/0xe8 [ 52.142798][ T5878] kobject_add+0x110/0x1c8 [ 52.142805][ T5878] device_add+0x394/0x9e0 [ 52.142813][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.142822][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 52.142831][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.142839][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 52.142848][ T5878] hci_event_packet+0x4c0/0x9c8 [ 52.142857][ T5878] hci_rx_work+0x2f4/0xd78 [ 52.142864][ T5878] process_scheduled_works+0x788/0x10b8 [ 52.142873][ T5878] worker_thread+0x798/0xbd0 [ 52.142882][ T5878] kthread+0x304/0x3d4 [ 52.142889][ T5878] ret_from_fork+0x10/0x20 [ 52.142905][ T5878] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.142920][ T5878] Bluetooth: hci2: failed to register connection device [ 52.143070][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 52.143076][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 52.143086][ T5878] Tainted: [W]=WARN [ 52.143089][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.143093][ T5878] Workqueue: hci2 hci_rx_work [ 52.143100][ T5878] Call trace: [ 52.143103][ T5878] show_stack+0x2c/0x3c (C) [ 52.143120][ T5878] __dump_stack+0x30/0x40 [ 52.143131][ T5878] dump_stack_lvl+0xd8/0x12c [ 52.143141][ T5878] dump_stack+0x1c/0x28 [ 52.143150][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 52.143160][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 52.143170][ T5878] kobject_add_internal+0x290/0x6f0 [ 52.143178][ T5878] kobject_add_varg+0x9c/0xe8 [ 52.143185][ T5878] kobject_add+0x110/0x1c8 [ 52.143192][ T5878] device_add+0x394/0x9e0 [ 52.143199][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.143208][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 52.143216][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.143225][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 52.143235][ T5878] hci_event_packet+0x4c0/0x9c8 [ 52.143243][ T5878] hci_rx_work+0x2f4/0xd78 [ 52.143250][ T5878] process_scheduled_works+0x788/0x10b8 [ 52.143259][ T5878] worker_thread+0x798/0xbd0 [ 52.143267][ T5878] kthread+0x304/0x3d4 [ 52.143274][ T5878] ret_from_fork+0x10/0x20 [ 52.143286][ T5878] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.143297][ T5878] Bluetooth: hci2: failed to register connection device [ 52.143338][ T5878] Bluetooth: hci2: command 0x2016 tx timeout [ 52.147004][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 52.147014][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 52.147026][ T5878] Tainted: [W]=WARN [ 52.147029][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.147033][ T5878] Workqueue: hci0 hci_rx_work [ 52.147043][ T5878] Call trace: [ 52.147046][ T5878] show_stack+0x2c/0x3c (C) [ 52.147058][ T5878] __dump_stack+0x30/0x40 [ 52.147068][ T5878] dump_stack_lvl+0xd8/0x12c [ 52.147078][ T5878] dump_stack+0x1c/0x28 [ 52.147087][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 52.147097][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 52.147115][ T5878] kobject_add_internal+0x290/0x6f0 [ 52.147124][ T5878] kobject_add_varg+0x9c/0xe8 [ 52.147132][ T5878] kobject_add+0x110/0x1c8 [ 52.147139][ T5878] device_add+0x394/0x9e0 [ 52.147146][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.147155][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 52.147164][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.147172][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 52.147181][ T5878] hci_event_packet+0x4c0/0x9c8 [ 52.147190][ T5878] hci_rx_work+0x2f4/0xd78 [ 52.147197][ T5878] process_scheduled_works+0x788/0x10b8 [ 52.147206][ T5878] worker_thread+0x798/0xbd0 [ 52.147214][ T5878] kthread+0x304/0x3d4 [ 52.147221][ T5878] ret_from_fork+0x10/0x20 [ 52.147233][ T5878] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.147244][ T5878] Bluetooth: hci0: failed to register connection device [ 52.154055][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci1/hci1:0' [ 52.154068][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 52.154080][ T5878] Tainted: [W]=WARN [ 52.154083][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.154088][ T5878] Workqueue: hci1 hci_rx_work [ 52.154100][ T5878] Call trace: [ 52.154103][ T5878] show_stack+0x2c/0x3c (C) [ 52.154123][ T5878] __dump_stack+0x30/0x40 [ 52.154134][ T5878] dump_stack_lvl+0xd8/0x12c [ 52.154144][ T5878] dump_stack+0x1c/0x28 [ 52.154154][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 52.154164][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 52.154173][ T5878] kobject_add_internal+0x290/0x6f0 [ 52.154182][ T5878] kobject_add_varg+0x9c/0xe8 [ 52.154189][ T5878] kobject_add+0x110/0x1c8 [ 52.154196][ T5878] device_add+0x394/0x9e0 [ 52.154203][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.154213][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 52.154222][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.154230][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 52.154239][ T5878] hci_event_packet+0x4c0/0x9c8 [ 52.154248][ T5878] hci_rx_work+0x2f4/0xd78 [ 52.154255][ T5878] process_scheduled_works+0x788/0x10b8 [ 52.154264][ T5878] worker_thread+0x798/0xbd0 [ 52.154273][ T5878] kthread+0x304/0x3d4 [ 52.154280][ T5878] ret_from_fork+0x10/0x20 [ 52.154293][ T5878] kobject: kobject_add_internal failed for hci1:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.154305][ T5878] Bluetooth: hci1: failed to register connection device [ 52.194337][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci1/hci1:0' [ 52.194351][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 52.194363][ T5878] Tainted: [W]=WARN [ 52.194367][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.194372][ T5878] Workqueue: hci1 hci_rx_work [ 52.194386][ T5878] Call trace: [ 52.194389][ T5878] show_stack+0x2c/0x3c (C) [ 52.194403][ T5878] __dump_stack+0x30/0x40 [ 52.194414][ T5878] dump_stack_lvl+0xd8/0x12c [ 52.194424][ T5878] dump_stack+0x1c/0x28 [ 52.194433][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 52.194444][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 52.194453][ T5878] kobject_add_internal+0x290/0x6f0 [ 52.194462][ T5878] kobject_add_varg+0x9c/0xe8 [ 52.194469][ T5878] kobject_add+0x110/0x1c8 [ 52.194476][ T5878] device_add+0x394/0x9e0 [ 52.194484][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.194494][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 52.194503][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.194511][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 52.194520][ T5878] hci_event_packet+0x4c0/0x9c8 [ 52.194529][ T5878] hci_rx_work+0x2f4/0xd78 [ 52.194536][ T5878] process_scheduled_works+0x788/0x10b8 [ 52.194545][ T5878] worker_thread+0x798/0xbd0 [ 52.194554][ T5878] kthread+0x304/0x3d4 [ 52.194561][ T5878] ret_from_fork+0x10/0x20 [ 52.194574][ T5878] kobject: kobject_add_internal failed for hci1:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.194585][ T5878] Bluetooth: hci1: failed to register connection device [ 52.230059][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 52.230076][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 52.230093][ T5878] Tainted: [W]=WARN [ 52.230096][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.230102][ T5878] Workqueue: hci2 hci_rx_work [ 52.230123][ T5878] Call trace: [ 52.230127][ T5878] show_stack+0x2c/0x3c (C) [ 52.230143][ T5878] __dump_stack+0x30/0x40 [ 52.230154][ T5878] dump_stack_lvl+0xd8/0x12c [ 52.230164][ T5878] dump_stack+0x1c/0x28 [ 52.230174][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 52.230185][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 52.230195][ T5878] kobject_add_internal+0x290/0x6f0 [ 52.230204][ T5878] kobject_add_varg+0x9c/0xe8 [ 52.230211][ T5878] kobject_add+0x110/0x1c8 [ 52.230218][ T5878] device_add+0x394/0x9e0 [ 52.230226][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.230235][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 52.230244][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.230252][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 52.230261][ T5878] hci_event_packet+0x4c0/0x9c8 [ 52.230270][ T5878] hci_rx_work+0x2f4/0xd78 [ 52.230277][ T5878] process_scheduled_works+0x788/0x10b8 [ 52.230286][ T5878] worker_thread+0x798/0xbd0 [ 52.230294][ T5878] kthread+0x304/0x3d4 [ 52.230302][ T5878] ret_from_fork+0x10/0x20 [ 52.232706][ T4860] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci4/hci4:0' [ 52.232716][ T4860] CPU: 1 UID: 0 PID: 4860 Comm: kworker/u9:4 Tainted: G W syzkaller #0 PREEMPT [ 52.232728][ T4860] Tainted: [W]=WARN [ 52.232731][ T4860] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.232736][ T4860] Workqueue: hci4 hci_rx_work [ 52.232744][ T4860] Call trace: [ 52.232747][ T4860] show_stack+0x2c/0x3c (C) [ 52.232758][ T4860] __dump_stack+0x30/0x40 [ 52.232768][ T4860] dump_stack_lvl+0xd8/0x12c [ 52.232778][ T4860] dump_stack+0x1c/0x28 [ 52.232787][ T4860] sysfs_warn_dup+0x9c/0xb8 [ 52.232797][ T4860] sysfs_create_dir_ns+0x190/0x1f4 [ 52.232807][ T4860] kobject_add_internal+0x290/0x6f0 [ 52.232815][ T4860] kobject_add_varg+0x9c/0xe8 [ 52.232822][ T4860] kobject_add+0x110/0x1c8 [ 52.232829][ T4860] device_add+0x394/0x9e0 [ 52.232836][ T4860] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.232845][ T4860] le_conn_complete_evt+0xc68/0x10f8 [ 52.232854][ T4860] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.232862][ T4860] hci_le_meta_evt+0x2b0/0x46c [ 52.232871][ T4860] hci_event_packet+0x4c0/0x9c8 [ 52.232880][ T4860] hci_rx_work+0x2f4/0xd78 [ 52.232886][ T4860] process_scheduled_works+0x788/0x10b8 [ 52.232895][ T4860] worker_thread+0x798/0xbd0 [ 52.232904][ T4860] kthread+0x304/0x3d4 [ 52.232912][ T4860] ret_from_fork+0x10/0x20 [ 52.232924][ T4860] kobject: kobject_add_internal failed for hci4:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.232935][ T4860] Bluetooth: hci4: failed to register connection device [ 52.233076][ T4860] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:0' [ 52.233083][ T4860] CPU: 1 UID: 0 PID: 4860 Comm: kworker/u9:4 Tainted: G W syzkaller #0 PREEMPT [ 52.233092][ T4860] Tainted: [W]=WARN [ 52.233095][ T4860] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.233099][ T4860] Workqueue: hci3 hci_rx_work [ 52.233105][ T4860] Call trace: [ 52.233111][ T4860] show_stack+0x2c/0x3c (C) [ 52.233122][ T4860] __dump_stack+0x30/0x40 [ 52.233133][ T4860] dump_stack_lvl+0xd8/0x12c [ 52.233144][ T4860] dump_stack+0x1c/0x28 [ 52.233154][ T4860] sysfs_warn_dup+0x9c/0xb8 [ 52.233164][ T4860] sysfs_create_dir_ns+0x190/0x1f4 [ 52.233173][ T4860] kobject_add_internal+0x290/0x6f0 [ 52.233181][ T4860] kobject_add_varg+0x9c/0xe8 [ 52.233188][ T4860] kobject_add+0x110/0x1c8 [ 52.233195][ T4860] device_add+0x394/0x9e0 [ 52.233202][ T4860] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.233212][ T4860] le_conn_complete_evt+0xc68/0x10f8 [ 52.233220][ T4860] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.233228][ T4860] hci_le_meta_evt+0x2b0/0x46c [ 52.233237][ T4860] hci_event_packet+0x4c0/0x9c8 [ 52.233246][ T4860] hci_rx_work+0x2f4/0xd78 [ 52.233253][ T4860] process_scheduled_works+0x788/0x10b8 [ 52.233261][ T4860] worker_thread+0x798/0xbd0 [ 52.233270][ T4860] kthread+0x304/0x3d4 [ 52.233277][ T4860] ret_from_fork+0x10/0x20 [ 52.233289][ T4860] kobject: kobject_add_internal failed for hci3:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.233298][ T4860] Bluetooth: hci3: failed to register connection device [ 52.233424][ T4860] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 52.233430][ T4860] CPU: 1 UID: 0 PID: 4860 Comm: kworker/u9:4 Tainted: G W syzkaller #0 PREEMPT [ 52.233439][ T4860] Tainted: [W]=WARN [ 52.233442][ T4860] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.233446][ T4860] Workqueue: hci0 hci_rx_work [ 52.233452][ T4860] Call trace: [ 52.233454][ T4860] show_stack+0x2c/0x3c (C) [ 52.233464][ T4860] __dump_stack+0x30/0x40 [ 52.233474][ T4860] dump_stack_lvl+0xd8/0x12c [ 52.233484][ T4860] dump_stack+0x1c/0x28 [ 52.233493][ T4860] sysfs_warn_dup+0x9c/0xb8 [ 52.233503][ T4860] sysfs_create_dir_ns+0x190/0x1f4 [ 52.233512][ T4860] kobject_add_internal+0x290/0x6f0 [ 52.233520][ T4860] kobject_add_varg+0x9c/0xe8 [ 52.233527][ T4860] kobject_add+0x110/0x1c8 [ 52.233534][ T4860] device_add+0x394/0x9e0 [ 52.233541][ T4860] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.233550][ T4860] le_conn_complete_evt+0xc68/0x10f8 [ 52.233558][ T4860] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.233566][ T4860] hci_le_meta_evt+0x2b0/0x46c [ 52.233575][ T4860] hci_event_packet+0x4c0/0x9c8 [ 52.233584][ T4860] hci_rx_work+0x2f4/0xd78 [ 52.233591][ T4860] process_scheduled_works+0x788/0x10b8 [ 52.233600][ T4860] worker_thread+0x798/0xbd0 [ 52.233608][ T4860] kthread+0x304/0x3d4 [ 52.233616][ T4860] ret_from_fork+0x10/0x20 [ 52.233627][ T4860] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.233636][ T4860] Bluetooth: hci0: failed to register connection device [ 52.233744][ T5878] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.233753][ T5878] Bluetooth: hci2: failed to register connection device [ 52.240199][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 52.240212][ T5914] CPU: 0 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.240223][ T5914] Tainted: [W]=WARN [ 52.240226][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.240231][ T5914] Workqueue: hci2 hci_rx_work [ 52.240242][ T5914] Call trace: [ 52.240244][ T5914] show_stack+0x2c/0x3c (C) [ 52.240257][ T5914] __dump_stack+0x30/0x40 [ 52.240267][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.240276][ T5914] dump_stack+0x1c/0x28 [ 52.240286][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.240296][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.240305][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.240313][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.240320][ T5914] kobject_add+0x110/0x1c8 [ 52.240327][ T5914] device_add+0x394/0x9e0 [ 52.240334][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.240343][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.240352][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.240360][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.240369][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.240378][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.240385][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.240394][ T5914] worker_thread+0x798/0xbd0 [ 52.240402][ T5914] kthread+0x304/0x3d4 [ 52.240410][ T5914] ret_from_fork+0x10/0x20 [ 52.240423][ T5914] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.240434][ T5914] Bluetooth: hci2: failed to register connection device [ 52.253315][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:0' [ 52.253331][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 52.253343][ T5878] Tainted: [W]=WARN [ 52.253346][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.253351][ T5878] Workqueue: hci3 hci_rx_work [ 52.253364][ T5878] Call trace: [ 52.253366][ T5878] show_stack+0x2c/0x3c (C) [ 52.253380][ T5878] __dump_stack+0x30/0x40 [ 52.253391][ T5878] dump_stack_lvl+0xd8/0x12c [ 52.253401][ T5878] dump_stack+0x1c/0x28 [ 52.253410][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 52.253421][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 52.253431][ T5878] kobject_add_internal+0x290/0x6f0 [ 52.253440][ T5878] kobject_add_varg+0x9c/0xe8 [ 52.253447][ T5878] kobject_add+0x110/0x1c8 [ 52.253454][ T5878] device_add+0x394/0x9e0 [ 52.253462][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.253472][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 52.253481][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.253490][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 52.253499][ T5878] hci_event_packet+0x4c0/0x9c8 [ 52.253508][ T5878] hci_rx_work+0x2f4/0xd78 [ 52.253515][ T5878] process_scheduled_works+0x788/0x10b8 [ 52.253524][ T5878] worker_thread+0x798/0xbd0 [ 52.253533][ T5878] kthread+0x304/0x3d4 [ 52.253541][ T5878] ret_from_fork+0x10/0x20 [ 52.253554][ T5878] kobject: kobject_add_internal failed for hci3:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.253565][ T5878] Bluetooth: hci3: failed to register connection device [ 52.253725][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 52.253735][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.253744][ T5914] Tainted: [W]=WARN [ 52.253747][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.253751][ T5914] Workqueue: hci0 hci_rx_work [ 52.253758][ T5914] Call trace: [ 52.253760][ T5914] show_stack+0x2c/0x3c (C) [ 52.253770][ T5914] __dump_stack+0x30/0x40 [ 52.253780][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.253790][ T5914] dump_stack+0x1c/0x28 [ 52.253799][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.253809][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.253818][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.253826][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.253832][ T5914] kobject_add+0x110/0x1c8 [ 52.253839][ T5914] device_add+0x394/0x9e0 [ 52.253846][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.253855][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.253863][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.253871][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.253880][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.253889][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.253895][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.253904][ T5914] worker_thread+0x798/0xbd0 [ 52.253913][ T5914] kthread+0x304/0x3d4 [ 52.253920][ T5914] ret_from_fork+0x10/0x20 [ 52.253933][ T5914] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.253943][ T5914] Bluetooth: hci0: failed to register connection device [ 52.255954][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci4/hci4:0' [ 52.255963][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.255974][ T5914] Tainted: [W]=WARN [ 52.255978][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.255982][ T5914] Workqueue: hci4 hci_rx_work [ 52.255991][ T5914] Call trace: [ 52.255993][ T5914] show_stack+0x2c/0x3c (C) [ 52.256005][ T5914] __dump_stack+0x30/0x40 [ 52.256015][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.256024][ T5914] dump_stack+0x1c/0x28 [ 52.256034][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.256043][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.256053][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.256061][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.256068][ T5914] kobject_add+0x110/0x1c8 [ 52.256075][ T5914] device_add+0x394/0x9e0 [ 52.256082][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.256091][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.256100][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.256113][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.256123][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.256131][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.256138][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.256147][ T5914] worker_thread+0x798/0xbd0 [ 52.256155][ T5914] kthread+0x304/0x3d4 [ 52.256163][ T5914] ret_from_fork+0x10/0x20 [ 52.256175][ T5914] kobject: kobject_add_internal failed for hci4:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.256185][ T5914] Bluetooth: hci4: failed to register connection device [ 52.282365][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 52.282380][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.282392][ T5914] Tainted: [W]=WARN [ 52.282396][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.282400][ T5914] Workqueue: hci0 hci_rx_work [ 52.282414][ T5914] Call trace: [ 52.282416][ T5914] show_stack+0x2c/0x3c (C) [ 52.282431][ T5914] __dump_stack+0x30/0x40 [ 52.282441][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.282451][ T5914] dump_stack+0x1c/0x28 [ 52.282460][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.282471][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.282481][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.282490][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.282497][ T5914] kobject_add+0x110/0x1c8 [ 52.282504][ T5914] device_add+0x394/0x9e0 [ 52.282512][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.282521][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.282530][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.282538][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.282547][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.282556][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.282563][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.282572][ T5914] worker_thread+0x798/0xbd0 [ 52.282581][ T5914] kthread+0x304/0x3d4 [ 52.282588][ T5914] ret_from_fork+0x10/0x20 [ 52.282602][ T5914] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.282614][ T5914] Bluetooth: hci0: failed to register connection device [ 52.284322][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:0' [ 52.284334][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.284349][ T5914] Tainted: [W]=WARN [ 52.284353][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.284359][ T5914] Workqueue: hci3 hci_rx_work [ 52.284369][ T5914] Call trace: [ 52.284372][ T5914] show_stack+0x2c/0x3c (C) [ 52.284386][ T5914] __dump_stack+0x30/0x40 [ 52.284401][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.284411][ T5914] dump_stack+0x1c/0x28 [ 52.284420][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.284433][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.284442][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.284451][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.284459][ T5914] kobject_add+0x110/0x1c8 [ 52.284465][ T5914] device_add+0x394/0x9e0 [ 52.284473][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.284484][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.284494][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.284502][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.284513][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.284522][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.284529][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.284538][ T5914] worker_thread+0x798/0xbd0 [ 52.284548][ T5914] kthread+0x304/0x3d4 [ 52.284556][ T5914] ret_from_fork+0x10/0x20 [ 52.284569][ T5914] kobject: kobject_add_internal failed for hci3:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.284580][ T5914] Bluetooth: hci3: failed to register connection device [ 52.291496][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 52.291508][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.291521][ T5914] Tainted: [W]=WARN [ 52.291524][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.291529][ T5914] Workqueue: hci2 hci_rx_work [ 52.291541][ T5914] Call trace: [ 52.291544][ T5914] show_stack+0x2c/0x3c (C) [ 52.291558][ T5914] __dump_stack+0x30/0x40 [ 52.291568][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.291578][ T5914] dump_stack+0x1c/0x28 [ 52.291588][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.291598][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.291608][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.291616][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.291623][ T5914] kobject_add+0x110/0x1c8 [ 52.291630][ T5914] device_add+0x394/0x9e0 [ 52.291638][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.291647][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.291656][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.291664][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.291673][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.291682][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.291689][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.291698][ T5914] worker_thread+0x798/0xbd0 [ 52.291707][ T5914] kthread+0x304/0x3d4 [ 52.291714][ T5914] ret_from_fork+0x10/0x20 [ 52.291727][ T5914] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.291738][ T5914] Bluetooth: hci2: failed to register connection device [ 52.293291][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci4/hci4:0' [ 52.293302][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.293314][ T5914] Tainted: [W]=WARN [ 52.293318][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.293323][ T5914] Workqueue: hci4 hci_rx_work [ 52.293333][ T5914] Call trace: [ 52.293335][ T5914] show_stack+0x2c/0x3c (C) [ 52.293347][ T5914] __dump_stack+0x30/0x40 [ 52.293357][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.293367][ T5914] dump_stack+0x1c/0x28 [ 52.293377][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.293386][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.293396][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.293404][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.293411][ T5914] kobject_add+0x110/0x1c8 [ 52.293418][ T5914] device_add+0x394/0x9e0 [ 52.293426][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.293435][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.293443][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.293451][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.293461][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.293469][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.293476][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.293485][ T5914] worker_thread+0x798/0xbd0 [ 52.293493][ T5914] kthread+0x304/0x3d4 [ 52.293501][ T5914] ret_from_fork+0x10/0x20 [ 52.293514][ T5914] kobject: kobject_add_internal failed for hci4:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.293525][ T5914] Bluetooth: hci4: failed to register connection device [ 52.295253][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci1/hci1:0' [ 52.295263][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.295274][ T5914] Tainted: [W]=WARN [ 52.295277][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.295282][ T5914] Workqueue: hci1 hci_rx_work [ 52.295290][ T5914] Call trace: [ 52.295293][ T5914] show_stack+0x2c/0x3c (C) [ 52.295304][ T5914] __dump_stack+0x30/0x40 [ 52.295314][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.295324][ T5914] dump_stack+0x1c/0x28 [ 52.295333][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.295343][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.295353][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.295361][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.295368][ T5914] kobject_add+0x110/0x1c8 [ 52.295374][ T5914] device_add+0x394/0x9e0 [ 52.295382][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.295391][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.295399][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.295408][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.295417][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.295425][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.295432][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.295441][ T5914] worker_thread+0x798/0xbd0 [ 52.295449][ T5914] kthread+0x304/0x3d4 [ 52.295457][ T5914] ret_from_fork+0x10/0x20 [ 52.295469][ T5914] kobject: kobject_add_internal failed for hci1:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.295479][ T5914] Bluetooth: hci1: failed to register connection device [ 52.326011][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 52.326029][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.326041][ T5914] Tainted: [W]=WARN [ 52.326045][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.326050][ T5914] Workqueue: hci0 hci_rx_work [ 52.326063][ T5914] Call trace: [ 52.326067][ T5914] show_stack+0x2c/0x3c (C) [ 52.326081][ T5914] __dump_stack+0x30/0x40 [ 52.326092][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.326102][ T5914] dump_stack+0x1c/0x28 [ 52.326122][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.326133][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.326143][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.326152][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.326159][ T5914] kobject_add+0x110/0x1c8 [ 52.326167][ T5914] device_add+0x394/0x9e0 [ 52.326175][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.326185][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.326193][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.326202][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.326211][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.326220][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.326227][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.326236][ T5914] worker_thread+0x798/0xbd0 [ 52.326245][ T5914] kthread+0x304/0x3d4 [ 52.326252][ T5914] ret_from_fork+0x10/0x20 [ 52.326265][ T5914] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.326277][ T5914] Bluetooth: hci0: failed to register connection device [ 52.328071][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:0' [ 52.328083][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.328095][ T5914] Tainted: [W]=WARN [ 52.328098][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.328104][ T5914] Workqueue: hci3 hci_rx_work [ 52.328120][ T5914] Call trace: [ 52.328123][ T5914] show_stack+0x2c/0x3c (C) [ 52.328137][ T5914] __dump_stack+0x30/0x40 [ 52.328150][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.328161][ T5914] dump_stack+0x1c/0x28 [ 52.328171][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.328182][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.328191][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.328199][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.328207][ T5914] kobject_add+0x110/0x1c8 [ 52.328214][ T5914] device_add+0x394/0x9e0 [ 52.328221][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.328231][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.328239][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.328247][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.328257][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.328266][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.328272][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.328282][ T5914] worker_thread+0x798/0xbd0 [ 52.328290][ T5914] kthread+0x304/0x3d4 [ 52.328298][ T5914] ret_from_fork+0x10/0x20 [ 52.328310][ T5914] kobject: kobject_add_internal failed for hci3:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.328320][ T5914] Bluetooth: hci3: failed to register connection device [ 52.329822][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 52.329834][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.329846][ T5914] Tainted: [W]=WARN [ 52.329849][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.329854][ T5914] Workqueue: hci2 hci_rx_work [ 52.329863][ T5914] Call trace: [ 52.329866][ T5914] show_stack+0x2c/0x3c (C) [ 52.329878][ T5914] __dump_stack+0x30/0x40 [ 52.329888][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.329897][ T5914] dump_stack+0x1c/0x28 [ 52.329907][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.329917][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.329926][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.329935][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.329942][ T5914] kobject_add+0x110/0x1c8 [ 52.329949][ T5914] device_add+0x394/0x9e0 [ 52.329956][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.329965][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.329974][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.329982][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.329991][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.330000][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.330007][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.330016][ T5914] worker_thread+0x798/0xbd0 [ 52.330024][ T5914] kthread+0x304/0x3d4 [ 52.330032][ T5914] ret_from_fork+0x10/0x20 [ 52.330045][ T5914] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.330056][ T5914] Bluetooth: hci2: failed to register connection device [ 52.340478][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci4/hci4:0' [ 52.340492][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.340504][ T5914] Tainted: [W]=WARN [ 52.340508][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.340512][ T5914] Workqueue: hci4 hci_rx_work [ 52.340525][ T5914] Call trace: [ 52.340528][ T5914] show_stack+0x2c/0x3c (C) [ 52.340542][ T5914] __dump_stack+0x30/0x40 [ 52.340552][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.340562][ T5914] dump_stack+0x1c/0x28 [ 52.340572][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.340582][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.340592][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.340601][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.340608][ T5914] kobject_add+0x110/0x1c8 [ 52.340615][ T5914] device_add+0x394/0x9e0 [ 52.340622][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.340632][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.340641][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.340649][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.340659][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.340668][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.340674][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.340684][ T5914] worker_thread+0x798/0xbd0 [ 52.340692][ T5914] kthread+0x304/0x3d4 [ 52.340700][ T5914] ret_from_fork+0x10/0x20 [ 52.340713][ T5914] kobject: kobject_add_internal failed for hci4:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.340725][ T5914] Bluetooth: hci4: failed to register connection device [ 52.371942][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci1/hci1:0' [ 52.371958][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.371970][ T5914] Tainted: [W]=WARN [ 52.371974][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.371978][ T5914] Workqueue: hci1 hci_rx_work [ 52.371993][ T5914] Call trace: [ 52.371996][ T5914] show_stack+0x2c/0x3c (C) [ 52.372011][ T5914] __dump_stack+0x30/0x40 [ 52.372022][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.372032][ T5914] dump_stack+0x1c/0x28 [ 52.372042][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.372053][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.372063][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.372072][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.372080][ T5914] kobject_add+0x110/0x1c8 [ 52.372086][ T5914] device_add+0x394/0x9e0 [ 52.372094][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.372105][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.372119][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.372129][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.372139][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.372147][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.372154][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.372164][ T5914] worker_thread+0x798/0xbd0 [ 52.372173][ T5914] kthread+0x304/0x3d4 [ 52.372180][ T5914] ret_from_fork+0x10/0x20 [ 52.372194][ T5914] kobject: kobject_add_internal failed for hci1:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.372206][ T5914] Bluetooth: hci1: failed to register connection device [ 52.401939][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 52.401955][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.401968][ T5914] Tainted: [W]=WARN [ 52.401971][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.401976][ T5914] Workqueue: hci0 hci_rx_work [ 52.401991][ T5914] Call trace: [ 52.401994][ T5914] show_stack+0x2c/0x3c (C) [ 52.402010][ T5914] __dump_stack+0x30/0x40 [ 52.402020][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.402030][ T5914] dump_stack+0x1c/0x28 [ 52.402040][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.402050][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.402060][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.402069][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.402076][ T5914] kobject_add+0x110/0x1c8 [ 52.402083][ T5914] device_add+0x394/0x9e0 [ 52.402091][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.402101][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.402114][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.402123][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.402133][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.402142][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.402149][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.402159][ T5914] worker_thread+0x798/0xbd0 [ 52.402168][ T5914] kthread+0x304/0x3d4 [ 52.402176][ T5914] ret_from_fork+0x10/0x20 [ 52.402188][ T5914] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.402201][ T5914] Bluetooth: hci0: failed to register connection device [ 52.405477][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:0' [ 52.405488][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.405500][ T5914] Tainted: [W]=WARN [ 52.405503][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.405508][ T5914] Workqueue: hci3 hci_rx_work [ 52.405517][ T5914] Call trace: [ 52.405520][ T5914] show_stack+0x2c/0x3c (C) [ 52.405532][ T5914] __dump_stack+0x30/0x40 [ 52.405542][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.405552][ T5914] dump_stack+0x1c/0x28 [ 52.405562][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.405572][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.405581][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.405589][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.405596][ T5914] kobject_add+0x110/0x1c8 [ 52.405603][ T5914] device_add+0x394/0x9e0 [ 52.405610][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.405620][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.405628][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.405636][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.405645][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.405654][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.405661][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.405670][ T5914] worker_thread+0x798/0xbd0 [ 52.405679][ T5914] kthread+0x304/0x3d4 [ 52.405687][ T5914] ret_from_fork+0x10/0x20 [ 52.405699][ T5914] kobject: kobject_add_internal failed for hci3:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.405710][ T5914] Bluetooth: hci3: failed to register connection device [ 52.408123][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 52.408136][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.408148][ T5914] Tainted: [W]=WARN [ 52.408151][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.408156][ T5914] Workqueue: hci2 hci_rx_work [ 52.408166][ T5914] Call trace: [ 52.408168][ T5914] show_stack+0x2c/0x3c (C) [ 52.408180][ T5914] __dump_stack+0x30/0x40 [ 52.408191][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.408201][ T5914] dump_stack+0x1c/0x28 [ 52.408210][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.408220][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.408230][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.408238][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.408245][ T5914] kobject_add+0x110/0x1c8 [ 52.408252][ T5914] device_add+0x394/0x9e0 [ 52.408259][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.408268][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.408277][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.408285][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.408295][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.408304][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.408310][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.408320][ T5914] worker_thread+0x798/0xbd0 [ 52.408328][ T5914] kthread+0x304/0x3d4 [ 52.408336][ T5914] ret_from_fork+0x10/0x20 [ 52.408348][ T5914] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.408359][ T5914] Bluetooth: hci2: failed to register connection device [ 52.413186][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci4/hci4:0' [ 52.413200][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.413217][ T5914] Tainted: [W]=WARN [ 52.413220][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.413225][ T5914] Workqueue: hci4 hci_rx_work [ 52.413236][ T5914] Call trace: [ 52.413238][ T5914] show_stack+0x2c/0x3c (C) [ 52.413251][ T5914] __dump_stack+0x30/0x40 [ 52.413261][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.413270][ T5914] dump_stack+0x1c/0x28 [ 52.413280][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.413290][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.413299][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.413307][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.413314][ T5914] kobject_add+0x110/0x1c8 [ 52.413321][ T5914] device_add+0x394/0x9e0 [ 52.413329][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.413338][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.413346][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.413354][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.413363][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.413372][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.413378][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.413388][ T5914] worker_thread+0x798/0xbd0 [ 52.413396][ T5914] kthread+0x304/0x3d4 [ 52.413404][ T5914] ret_from_fork+0x10/0x20 [ 52.413416][ T5914] kobject: kobject_add_internal failed for hci4:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.413427][ T5914] Bluetooth: hci4: failed to register connection device [ 52.422783][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci1/hci1:0' [ 52.422796][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.422808][ T5914] Tainted: [W]=WARN [ 52.422811][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.422816][ T5914] Workqueue: hci1 hci_rx_work [ 52.422827][ T5914] Call trace: [ 52.422830][ T5914] show_stack+0x2c/0x3c (C) [ 52.422843][ T5914] __dump_stack+0x30/0x40 [ 52.422853][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.422863][ T5914] dump_stack+0x1c/0x28 [ 52.422873][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.422883][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.422893][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.422901][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.422908][ T5914] kobject_add+0x110/0x1c8 [ 52.422915][ T5914] device_add+0x394/0x9e0 [ 52.422923][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.422932][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.422940][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.422949][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.422958][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.422966][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.422973][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.422983][ T5914] worker_thread+0x798/0xbd0 [ 52.422991][ T5914] kthread+0x304/0x3d4 [ 52.422999][ T5914] ret_from_fork+0x10/0x20 [ 52.423012][ T5914] kobject: kobject_add_internal failed for hci1:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.423023][ T5914] Bluetooth: hci1: failed to register connection device [ 52.452561][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 52.452578][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.452590][ T5914] Tainted: [W]=WARN [ 52.452594][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.452599][ T5914] Workqueue: hci2 hci_rx_work [ 52.452613][ T5914] Call trace: [ 52.452616][ T5914] show_stack+0x2c/0x3c (C) [ 52.452633][ T5914] __dump_stack+0x30/0x40 [ 52.452644][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.452654][ T5914] dump_stack+0x1c/0x28 [ 52.452663][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.452674][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.452684][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.452693][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.452700][ T5914] kobject_add+0x110/0x1c8 [ 52.452708][ T5914] device_add+0x394/0x9e0 [ 52.452715][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.452725][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.452733][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.452741][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.452751][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.452759][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.452766][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.452776][ T5914] worker_thread+0x798/0xbd0 [ 52.452785][ T5914] kthread+0x304/0x3d4 [ 52.452793][ T5914] ret_from_fork+0x10/0x20 [ 52.452805][ T5914] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.452817][ T5914] Bluetooth: hci2: failed to register connection device [ 52.453412][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 52.453421][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.453432][ T5914] Tainted: [W]=WARN [ 52.453435][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.453440][ T5914] Workqueue: hci0 hci_rx_work [ 52.453449][ T5914] Call trace: [ 52.453452][ T5914] show_stack+0x2c/0x3c (C) [ 52.453463][ T5914] __dump_stack+0x30/0x40 [ 52.453473][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.453483][ T5914] dump_stack+0x1c/0x28 [ 52.453492][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.453502][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.453511][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.453519][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.453526][ T5914] kobject_add+0x110/0x1c8 [ 52.453533][ T5914] device_add+0x394/0x9e0 [ 52.453540][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.453549][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.453558][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.453566][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.453575][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.453584][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.453590][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.453599][ T5914] worker_thread+0x798/0xbd0 [ 52.453608][ T5914] kthread+0x304/0x3d4 [ 52.453615][ T5914] ret_from_fork+0x10/0x20 [ 52.453628][ T5914] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.453638][ T5914] Bluetooth: hci0: failed to register connection device [ 52.454361][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:0' [ 52.454372][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.454384][ T5914] Tainted: [W]=WARN [ 52.454388][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.454393][ T5914] Workqueue: hci3 hci_rx_work [ 52.454402][ T5914] Call trace: [ 52.454405][ T5914] show_stack+0x2c/0x3c (C) [ 52.454416][ T5914] __dump_stack+0x30/0x40 [ 52.454426][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.454436][ T5914] dump_stack+0x1c/0x28 [ 52.454445][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.454455][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.454465][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.454473][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.454480][ T5914] kobject_add+0x110/0x1c8 [ 52.454487][ T5914] device_add+0x394/0x9e0 [ 52.454494][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.454503][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.454511][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.454520][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.454529][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.454537][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.454544][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.454553][ T5914] worker_thread+0x798/0xbd0 [ 52.454562][ T5914] kthread+0x304/0x3d4 [ 52.454569][ T5914] ret_from_fork+0x10/0x20 [ 52.454581][ T5914] kobject: kobject_add_internal failed for hci3:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.454592][ T5914] Bluetooth: hci3: failed to register connection device [ 52.463228][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci4/hci4:0' [ 52.463239][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.463250][ T5914] Tainted: [W]=WARN [ 52.463254][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.463258][ T5914] Workqueue: hci4 hci_rx_work [ 52.463269][ T5914] Call trace: [ 52.463272][ T5914] show_stack+0x2c/0x3c (C) [ 52.463285][ T5914] __dump_stack+0x30/0x40 [ 52.463295][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.463305][ T5914] dump_stack+0x1c/0x28 [ 52.463314][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.463324][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.463334][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.463342][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.463349][ T5914] kobject_add+0x110/0x1c8 [ 52.463356][ T5914] device_add+0x394/0x9e0 [ 52.463364][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.463373][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.463382][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.463390][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.463399][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.463408][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.463414][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.463424][ T5914] worker_thread+0x798/0xbd0 [ 52.463432][ T5914] kthread+0x304/0x3d4 [ 52.463440][ T5914] ret_from_fork+0x10/0x20 [ 52.463452][ T5914] kobject: kobject_add_internal failed for hci4:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.463463][ T5914] Bluetooth: hci4: failed to register connection device [ 52.485287][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci1/hci1:0' [ 52.485302][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.485314][ T5914] Tainted: [W]=WARN [ 52.485318][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.485322][ T5914] Workqueue: hci1 hci_rx_work [ 52.485337][ T5914] Call trace: [ 52.485340][ T5914] show_stack+0x2c/0x3c (C) [ 52.485355][ T5914] __dump_stack+0x30/0x40 [ 52.485365][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.485375][ T5914] dump_stack+0x1c/0x28 [ 52.485385][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.485396][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.485406][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.485414][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.485421][ T5914] kobject_add+0x110/0x1c8 [ 52.485428][ T5914] device_add+0x394/0x9e0 [ 52.485436][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.485446][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.485455][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.485463][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.485472][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.485481][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.485487][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.485497][ T5914] worker_thread+0x798/0xbd0 [ 52.485505][ T5914] kthread+0x304/0x3d4 [ 52.485513][ T5914] ret_from_fork+0x10/0x20 [ 52.485526][ T5914] kobject: kobject_add_internal failed for hci1:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.485538][ T5914] Bluetooth: hci1: failed to register connection device [ 52.503559][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 52.503574][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.503586][ T5914] Tainted: [W]=WARN [ 52.503589][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.503594][ T5914] Workqueue: hci0 hci_rx_work [ 52.503608][ T5914] Call trace: [ 52.503612][ T5914] show_stack+0x2c/0x3c (C) [ 52.503627][ T5914] __dump_stack+0x30/0x40 [ 52.503638][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.503648][ T5914] dump_stack+0x1c/0x28 [ 52.503657][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.503669][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.503678][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.503688][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.503695][ T5914] kobject_add+0x110/0x1c8 [ 52.503702][ T5914] device_add+0x394/0x9e0 [ 52.503710][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.503720][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.503728][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.503736][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.503745][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.503754][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.503761][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.503770][ T5914] worker_thread+0x798/0xbd0 [ 52.503778][ T5914] kthread+0x304/0x3d4 [ 52.503786][ T5914] ret_from_fork+0x10/0x20 [ 52.503798][ T5914] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.503811][ T5914] Bluetooth: hci0: failed to register connection device [ 52.505631][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:0' [ 52.505641][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.505653][ T5914] Tainted: [W]=WARN [ 52.505656][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.505661][ T5914] Workqueue: hci3 hci_rx_work [ 52.505671][ T5914] Call trace: [ 52.505675][ T5914] show_stack+0x2c/0x3c (C) [ 52.505687][ T5914] __dump_stack+0x30/0x40 [ 52.505699][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.505708][ T5914] dump_stack+0x1c/0x28 [ 52.505718][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.505729][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.505738][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.505747][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.505754][ T5914] kobject_add+0x110/0x1c8 [ 52.505761][ T5914] device_add+0x394/0x9e0 [ 52.505768][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.505778][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.505787][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.505795][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.505805][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.505814][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.505821][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.505830][ T5914] worker_thread+0x798/0xbd0 [ 52.505838][ T5914] kthread+0x304/0x3d4 [ 52.505846][ T5914] ret_from_fork+0x10/0x20 [ 52.505858][ T5914] kobject: kobject_add_internal failed for hci3:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.505869][ T5914] Bluetooth: hci3: failed to register connection device [ 52.507444][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci4/hci4:0' [ 52.507453][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.507464][ T5914] Tainted: [W]=WARN [ 52.507468][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.507472][ T5914] Workqueue: hci4 hci_rx_work [ 52.507481][ T5914] Call trace: [ 52.507484][ T5914] show_stack+0x2c/0x3c (C) [ 52.507495][ T5914] __dump_stack+0x30/0x40 [ 52.507505][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.507515][ T5914] dump_stack+0x1c/0x28 [ 52.507525][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.507534][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.507544][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.507552][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.507559][ T5914] kobject_add+0x110/0x1c8 [ 52.507566][ T5914] device_add+0x394/0x9e0 [ 52.507573][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.507582][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.507591][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.507599][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.507608][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.507617][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.507623][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.507632][ T5914] worker_thread+0x798/0xbd0 [ 52.507641][ T5914] kthread+0x304/0x3d4 [ 52.507648][ T5914] ret_from_fork+0x10/0x20 [ 52.507660][ T5914] kobject: kobject_add_internal failed for hci4:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.507672][ T5914] Bluetooth: hci4: failed to register connection device [ 52.508246][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 52.508254][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.508265][ T5914] Tainted: [W]=WARN [ 52.508272][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.508277][ T5914] Workqueue: hci2 hci_rx_work [ 52.508287][ T5914] Call trace: [ 52.508290][ T5914] show_stack+0x2c/0x3c (C) [ 52.508308][ T5914] __dump_stack+0x30/0x40 [ 52.508319][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.508330][ T5914] dump_stack+0x1c/0x28 [ 52.508340][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.508349][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.508359][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.508367][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.508375][ T5914] kobject_add+0x110/0x1c8 [ 52.508382][ T5914] device_add+0x394/0x9e0 [ 52.508389][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.508398][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.508407][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.508415][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.508424][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.508433][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.508440][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.508449][ T5914] worker_thread+0x798/0xbd0 [ 52.508457][ T5914] kthread+0x304/0x3d4 [ 52.508465][ T5914] ret_from_fork+0x10/0x20 [ 52.508490][ T5914] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.508504][ T5914] Bluetooth: hci2: failed to register connection device [ 52.541387][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci1/hci1:0' [ 52.541401][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.541413][ T5914] Tainted: [W]=WARN [ 52.541416][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.541421][ T5914] Workqueue: hci1 hci_rx_work [ 52.541435][ T5914] Call trace: [ 52.541437][ T5914] show_stack+0x2c/0x3c (C) [ 52.541451][ T5914] __dump_stack+0x30/0x40 [ 52.541461][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.541471][ T5914] dump_stack+0x1c/0x28 [ 52.541481][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.541491][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.541501][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.541510][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.541517][ T5914] kobject_add+0x110/0x1c8 [ 52.541524][ T5914] device_add+0x394/0x9e0 [ 52.541532][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.541541][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.541550][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.541558][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.541567][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.541576][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.541582][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.541592][ T5914] worker_thread+0x798/0xbd0 [ 52.541600][ T5914] kthread+0x304/0x3d4 [ 52.541608][ T5914] ret_from_fork+0x10/0x20 [ 52.541620][ T5914] kobject: kobject_add_internal failed for hci1:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.541633][ T5914] Bluetooth: hci1: failed to register connection device [ 52.554500][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 52.554515][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.554526][ T5914] Tainted: [W]=WARN [ 52.554529][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.554534][ T5914] Workqueue: hci0 hci_rx_work [ 52.554551][ T5914] Call trace: [ 52.554554][ T5914] show_stack+0x2c/0x3c (C) [ 52.554568][ T5914] __dump_stack+0x30/0x40 [ 52.554582][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.554596][ T5914] dump_stack+0x1c/0x28 [ 52.554606][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.554616][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.554626][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.554635][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.554643][ T5914] kobject_add+0x110/0x1c8 [ 52.554649][ T5914] device_add+0x394/0x9e0 [ 52.554657][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.554667][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.554676][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.554684][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.554694][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.554702][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.554709][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.554719][ T5914] worker_thread+0x798/0xbd0 [ 52.554728][ T5914] kthread+0x304/0x3d4 [ 52.554736][ T5914] ret_from_fork+0x10/0x20 [ 52.554763][ T5914] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.554779][ T5914] Bluetooth: hci0: failed to register connection device [ 52.565477][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:0' [ 52.565490][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.565502][ T5914] Tainted: [W]=WARN [ 52.565505][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.565510][ T5914] Workqueue: hci3 hci_rx_work [ 52.565522][ T5914] Call trace: [ 52.565525][ T5914] show_stack+0x2c/0x3c (C) [ 52.565539][ T5914] __dump_stack+0x30/0x40 [ 52.565549][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.565559][ T5914] dump_stack+0x1c/0x28 [ 52.565568][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.565578][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.565588][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.565596][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.565604][ T5914] kobject_add+0x110/0x1c8 [ 52.565611][ T5914] device_add+0x394/0x9e0 [ 52.565618][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.565627][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.565636][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.565644][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.565653][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.565662][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.565668][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.565678][ T5914] worker_thread+0x798/0xbd0 [ 52.565686][ T5914] kthread+0x304/0x3d4 [ 52.565694][ T5914] ret_from_fork+0x10/0x20 [ 52.565706][ T5914] kobject: kobject_add_internal failed for hci3:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.565718][ T5914] Bluetooth: hci3: failed to register connection device [ 52.566944][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci4/hci4:0' [ 52.566954][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.566964][ T5914] Tainted: [W]=WARN [ 52.566968][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.566972][ T5914] Workqueue: hci4 hci_rx_work [ 52.566981][ T5914] Call trace: [ 52.566984][ T5914] show_stack+0x2c/0x3c (C) [ 52.566996][ T5914] __dump_stack+0x30/0x40 [ 52.567007][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.567016][ T5914] dump_stack+0x1c/0x28 [ 52.567026][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.567036][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.567046][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.567054][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.567061][ T5914] kobject_add+0x110/0x1c8 [ 52.567068][ T5914] device_add+0x394/0x9e0 [ 52.567075][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.567085][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.567093][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.567102][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.567119][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.567129][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.567136][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.567146][ T5914] worker_thread+0x798/0xbd0 [ 52.567155][ T5914] kthread+0x304/0x3d4 [ 52.567163][ T5914] ret_from_fork+0x10/0x20 [ 52.567175][ T5914] kobject: kobject_add_internal failed for hci4:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.567186][ T5914] Bluetooth: hci4: failed to register connection device [ 52.569858][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 52.569868][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.569880][ T5914] Tainted: [W]=WARN [ 52.569883][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.569888][ T5914] Workqueue: hci2 hci_rx_work [ 52.569897][ T5914] Call trace: [ 52.569900][ T5914] show_stack+0x2c/0x3c (C) [ 52.569911][ T5914] __dump_stack+0x30/0x40 [ 52.569922][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.569931][ T5914] dump_stack+0x1c/0x28 [ 52.569941][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.569951][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.569960][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.569968][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.569975][ T5914] kobject_add+0x110/0x1c8 [ 52.569983][ T5914] device_add+0x394/0x9e0 [ 52.569990][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.569999][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.570008][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.570016][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.570025][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.570034][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.570041][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.570050][ T5914] worker_thread+0x798/0xbd0 [ 52.570058][ T5914] kthread+0x304/0x3d4 [ 52.570066][ T5914] ret_from_fork+0x10/0x20 [ 52.570078][ T5914] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.573246][ T5914] Bluetooth: hci2: failed to register connection device [ 52.601668][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci1/hci1:0' [ 52.601683][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.601695][ T5914] Tainted: [W]=WARN [ 52.601698][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.601703][ T5914] Workqueue: hci1 hci_rx_work [ 52.601716][ T5914] Call trace: [ 52.601719][ T5914] show_stack+0x2c/0x3c (C) [ 52.601733][ T5914] __dump_stack+0x30/0x40 [ 52.601744][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.601753][ T5914] dump_stack+0x1c/0x28 [ 52.601763][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.601773][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.601783][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.601792][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.601799][ T5914] kobject_add+0x110/0x1c8 [ 52.601806][ T5914] device_add+0x394/0x9e0 [ 52.601814][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.601823][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.601832][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.601840][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.601849][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.601858][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.601864][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.601874][ T5914] worker_thread+0x798/0xbd0 [ 52.601883][ T5914] kthread+0x304/0x3d4 [ 52.601890][ T5914] ret_from_fork+0x10/0x20 [ 52.601903][ T5914] kobject: kobject_add_internal failed for hci1:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.601916][ T5914] Bluetooth: hci1: failed to register connection device [ 52.613533][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 52.613548][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.613560][ T5914] Tainted: [W]=WARN [ 52.613564][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.613569][ T5914] Workqueue: hci0 hci_rx_work [ 52.613582][ T5914] Call trace: [ 52.613585][ T5914] show_stack+0x2c/0x3c (C) [ 52.613598][ T5914] __dump_stack+0x30/0x40 [ 52.613609][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.613618][ T5914] dump_stack+0x1c/0x28 [ 52.613628][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.613639][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.613648][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.613657][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.613664][ T5914] kobject_add+0x110/0x1c8 [ 52.613671][ T5914] device_add+0x394/0x9e0 [ 52.613679][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.613689][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.613698][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.613706][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.613715][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.613724][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.613730][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.613740][ T5914] worker_thread+0x798/0xbd0 [ 52.613749][ T5914] kthread+0x304/0x3d4 [ 52.613756][ T5914] ret_from_fork+0x10/0x20 [ 52.613769][ T5914] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.613780][ T5914] Bluetooth: hci0: failed to register connection device [ 52.615451][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 52.615461][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.615472][ T5914] Tainted: [W]=WARN [ 52.615475][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.615480][ T5914] Workqueue: hci2 hci_rx_work [ 52.615489][ T5914] Call trace: [ 52.615492][ T5914] show_stack+0x2c/0x3c (C) [ 52.615504][ T5914] __dump_stack+0x30/0x40 [ 52.615514][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.615524][ T5914] dump_stack+0x1c/0x28 [ 52.615533][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.615543][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.615552][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.615561][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.615568][ T5914] kobject_add+0x110/0x1c8 [ 52.615575][ T5914] device_add+0x394/0x9e0 [ 52.615582][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.615591][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.615600][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.615609][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.615618][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.615627][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.615633][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.615643][ T5914] worker_thread+0x798/0xbd0 [ 52.615651][ T5914] kthread+0x304/0x3d4 [ 52.615659][ T5914] ret_from_fork+0x10/0x20 [ 52.615671][ T5914] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.615682][ T5914] Bluetooth: hci2: failed to register connection device [ 52.620535][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:0' [ 52.620548][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.620560][ T5914] Tainted: [W]=WARN [ 52.620564][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.620568][ T5914] Workqueue: hci3 hci_rx_work [ 52.620579][ T5914] Call trace: [ 52.620582][ T5914] show_stack+0x2c/0x3c (C) [ 52.620595][ T5914] __dump_stack+0x30/0x40 [ 52.620605][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.620615][ T5914] dump_stack+0x1c/0x28 [ 52.620624][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.620634][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.620644][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.620652][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.620659][ T5914] kobject_add+0x110/0x1c8 [ 52.620666][ T5914] device_add+0x394/0x9e0 [ 52.620673][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.620682][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.620691][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.620699][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.620708][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.620717][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.620724][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.620733][ T5914] worker_thread+0x798/0xbd0 [ 52.620742][ T5914] kthread+0x304/0x3d4 [ 52.620749][ T5914] ret_from_fork+0x10/0x20 [ 52.620762][ T5914] kobject: kobject_add_internal failed for hci3:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.620773][ T5914] Bluetooth: hci3: failed to register connection device [ 52.623988][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci4/hci4:0' [ 52.624000][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.624012][ T5914] Tainted: [W]=WARN [ 52.624015][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.624019][ T5914] Workqueue: hci4 hci_rx_work [ 52.624029][ T5914] Call trace: [ 52.624032][ T5914] show_stack+0x2c/0x3c (C) [ 52.624043][ T5914] __dump_stack+0x30/0x40 [ 52.624053][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.624063][ T5914] dump_stack+0x1c/0x28 [ 52.624073][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.624082][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.624092][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.624100][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.624113][ T5914] kobject_add+0x110/0x1c8 [ 52.624121][ T5914] device_add+0x394/0x9e0 [ 52.624129][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.624138][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.624146][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.624154][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.624163][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.624172][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.624179][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.624188][ T5914] worker_thread+0x798/0xbd0 [ 52.624196][ T5914] kthread+0x304/0x3d4 [ 52.624204][ T5914] ret_from_fork+0x10/0x20 [ 52.624216][ T5914] kobject: kobject_add_internal failed for hci4:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.624227][ T5914] Bluetooth: hci4: failed to register connection device [ 52.660907][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci1/hci1:0' [ 52.660922][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.660933][ T5914] Tainted: [W]=WARN [ 52.660937][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.660941][ T5914] Workqueue: hci1 hci_rx_work [ 52.660956][ T5914] Call trace: [ 52.660958][ T5914] show_stack+0x2c/0x3c (C) [ 52.660973][ T5914] __dump_stack+0x30/0x40 [ 52.660983][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.660993][ T5914] dump_stack+0x1c/0x28 [ 52.661002][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.661013][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.661022][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.661031][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.661038][ T5914] kobject_add+0x110/0x1c8 [ 52.661045][ T5914] device_add+0x394/0x9e0 [ 52.661052][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.661062][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.661070][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.661078][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.661088][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.661096][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.661103][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.661121][ T5914] worker_thread+0x798/0xbd0 [ 52.661130][ T5914] kthread+0x304/0x3d4 [ 52.661138][ T5914] ret_from_fork+0x10/0x20 [ 52.661154][ T5914] kobject: kobject_add_internal failed for hci1:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.661167][ T5914] Bluetooth: hci1: failed to register connection device [ 52.666029][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 52.666042][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.666055][ T5914] Tainted: [W]=WARN [ 52.666058][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.666063][ T5914] Workqueue: hci2 hci_rx_work [ 52.666073][ T5914] Call trace: [ 52.666076][ T5914] show_stack+0x2c/0x3c (C) [ 52.666088][ T5914] __dump_stack+0x30/0x40 [ 52.666098][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.666118][ T5914] dump_stack+0x1c/0x28 [ 52.666127][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.666137][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.666147][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.666156][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.666163][ T5914] kobject_add+0x110/0x1c8 [ 52.666170][ T5914] device_add+0x394/0x9e0 [ 52.666177][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.666186][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.666195][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.666203][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.666212][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.666221][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.666228][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.666237][ T5914] worker_thread+0x798/0xbd0 [ 52.666245][ T5914] kthread+0x304/0x3d4 [ 52.666253][ T5914] ret_from_fork+0x10/0x20 [ 52.666266][ T5914] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.666278][ T5914] Bluetooth: hci2: failed to register connection device [ 52.668651][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:0' [ 52.668661][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.668673][ T5914] Tainted: [W]=WARN [ 52.668676][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.668681][ T5914] Workqueue: hci3 hci_rx_work [ 52.668690][ T5914] Call trace: [ 52.668693][ T5914] show_stack+0x2c/0x3c (C) [ 52.668705][ T5914] __dump_stack+0x30/0x40 [ 52.668714][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.668724][ T5914] dump_stack+0x1c/0x28 [ 52.668734][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.668743][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.668753][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.668761][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.668768][ T5914] kobject_add+0x110/0x1c8 [ 52.668775][ T5914] device_add+0x394/0x9e0 [ 52.668782][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.668791][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.668800][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.668808][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.668817][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.668825][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.668832][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.668841][ T5914] worker_thread+0x798/0xbd0 [ 52.668849][ T5914] kthread+0x304/0x3d4 [ 52.668857][ T5914] ret_from_fork+0x10/0x20 [ 52.668869][ T5914] kobject: kobject_add_internal failed for hci3:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.668880][ T5914] Bluetooth: hci3: failed to register connection device [ 52.677630][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 52.677644][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.677656][ T5914] Tainted: [W]=WARN [ 52.677659][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.677664][ T5914] Workqueue: hci0 hci_rx_work [ 52.677676][ T5914] Call trace: [ 52.677679][ T5914] show_stack+0x2c/0x3c (C) [ 52.677693][ T5914] __dump_stack+0x30/0x40 [ 52.677704][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.677714][ T5914] dump_stack+0x1c/0x28 [ 52.677723][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.677734][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.677743][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.677752][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.677759][ T5914] kobject_add+0x110/0x1c8 [ 52.677766][ T5914] device_add+0x394/0x9e0 [ 52.677773][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.677783][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.677792][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.677801][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.677810][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.677819][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.677826][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.677835][ T5914] worker_thread+0x798/0xbd0 [ 52.677843][ T5914] kthread+0x304/0x3d4 [ 52.677851][ T5914] ret_from_fork+0x10/0x20 [ 52.677865][ T5914] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.677878][ T5914] Bluetooth: hci0: failed to register connection device [ 52.679993][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci4/hci4:0' [ 52.680003][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.680015][ T5914] Tainted: [W]=WARN [ 52.680018][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.680023][ T5914] Workqueue: hci4 hci_rx_work [ 52.680033][ T5914] Call trace: [ 52.680036][ T5914] show_stack+0x2c/0x3c (C) [ 52.680048][ T5914] __dump_stack+0x30/0x40 [ 52.680058][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.680068][ T5914] dump_stack+0x1c/0x28 [ 52.680077][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.680092][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.680102][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.680115][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.680123][ T5914] kobject_add+0x110/0x1c8 [ 52.680130][ T5914] device_add+0x394/0x9e0 [ 52.680137][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.680147][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.680155][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.680163][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.680172][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.680181][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.680188][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.680197][ T5914] worker_thread+0x798/0xbd0 [ 52.680206][ T5914] kthread+0x304/0x3d4 [ 52.680213][ T5914] ret_from_fork+0x10/0x20 [ 52.680307][ T5914] kobject: kobject_add_internal failed for hci4:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.680319][ T5914] Bluetooth: hci4: failed to register connection device [ 52.712529][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:0' [ 52.712544][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.712556][ T5914] Tainted: [W]=WARN [ 52.712559][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.712564][ T5914] Workqueue: hci3 hci_rx_work [ 52.712578][ T5914] Call trace: [ 52.712581][ T5914] show_stack+0x2c/0x3c (C) [ 52.712596][ T5914] __dump_stack+0x30/0x40 [ 52.712608][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.712617][ T5914] dump_stack+0x1c/0x28 [ 52.712627][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.712638][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.712648][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.712657][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.712664][ T5914] kobject_add+0x110/0x1c8 [ 52.712671][ T5914] device_add+0x394/0x9e0 [ 52.712679][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.712689][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.712697][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.712705][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.712714][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.712723][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.712730][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.712739][ T5914] worker_thread+0x798/0xbd0 [ 52.712748][ T5914] kthread+0x304/0x3d4 [ 52.712755][ T5914] ret_from_fork+0x10/0x20 [ 52.712768][ T5914] kobject: kobject_add_internal failed for hci3:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.712780][ T5914] Bluetooth: hci3: failed to register connection device [ 52.755099][ T4860] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 52.755124][ T4860] CPU: 1 UID: 0 PID: 4860 Comm: kworker/u9:4 Tainted: G W syzkaller #0 PREEMPT [ 52.755137][ T4860] Tainted: [W]=WARN [ 52.755141][ T4860] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.755148][ T4860] Workqueue: hci2 hci_rx_work [ 52.755164][ T4860] Call trace: [ 52.755169][ T4860] show_stack+0x2c/0x3c (C) [ 52.755186][ T4860] __dump_stack+0x30/0x40 [ 52.755197][ T4860] dump_stack_lvl+0xd8/0x12c [ 52.755208][ T4860] dump_stack+0x1c/0x28 [ 52.755217][ T4860] sysfs_warn_dup+0x9c/0xb8 [ 52.755228][ T4860] sysfs_create_dir_ns+0x190/0x1f4 [ 52.755238][ T4860] kobject_add_internal+0x290/0x6f0 [ 52.755248][ T4860] kobject_add_varg+0x9c/0xe8 [ 52.755255][ T4860] kobject_add+0x110/0x1c8 [ 52.755262][ T4860] device_add+0x394/0x9e0 [ 52.755270][ T4860] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.755279][ T4860] le_conn_complete_evt+0xc68/0x10f8 [ 52.755288][ T4860] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.755296][ T4860] hci_le_meta_evt+0x2b0/0x46c [ 52.755306][ T4860] hci_event_packet+0x4c0/0x9c8 [ 52.755314][ T4860] hci_rx_work+0x2f4/0xd78 [ 52.755322][ T4860] process_scheduled_works+0x788/0x10b8 [ 52.755331][ T4860] worker_thread+0x798/0xbd0 [ 52.755340][ T4860] kthread+0x304/0x3d4 [ 52.755347][ T4860] ret_from_fork+0x10/0x20 [ 52.755362][ T4860] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.755383][ T4860] Bluetooth: hci2: failed to register connection device [ 52.755494][ T5878] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci1/hci1:0' [ 52.755501][ T5878] CPU: 1 UID: 0 PID: 5878 Comm: kworker/u9:6 Tainted: G W syzkaller #0 PREEMPT [ 52.755511][ T5878] Tainted: [W]=WARN [ 52.755514][ T5878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.755519][ T5878] Workqueue: hci1 hci_rx_work [ 52.755526][ T5878] Call trace: [ 52.755528][ T5878] show_stack+0x2c/0x3c (C) [ 52.755539][ T5878] __dump_stack+0x30/0x40 [ 52.755549][ T5878] dump_stack_lvl+0xd8/0x12c [ 52.755559][ T5878] dump_stack+0x1c/0x28 [ 52.755568][ T5878] sysfs_warn_dup+0x9c/0xb8 [ 52.755577][ T5878] sysfs_create_dir_ns+0x190/0x1f4 [ 52.755587][ T5878] kobject_add_internal+0x290/0x6f0 [ 52.755595][ T5878] kobject_add_varg+0x9c/0xe8 [ 52.755602][ T5878] kobject_add+0x110/0x1c8 [ 52.755609][ T5878] device_add+0x394/0x9e0 [ 52.755615][ T5878] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.755624][ T5878] le_conn_complete_evt+0xc68/0x10f8 [ 52.755632][ T5878] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.755641][ T5878] hci_le_meta_evt+0x2b0/0x46c [ 52.755650][ T5878] hci_event_packet+0x4c0/0x9c8 [ 52.755658][ T5878] hci_rx_work+0x2f4/0xd78 [ 52.755665][ T5878] process_scheduled_works+0x788/0x10b8 [ 52.755674][ T5878] worker_thread+0x798/0xbd0 [ 52.755682][ T5878] kthread+0x304/0x3d4 [ 52.755689][ T5878] ret_from_fork+0x10/0x20 [ 52.755702][ T5878] kobject: kobject_add_internal failed for hci1:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.755712][ T5878] Bluetooth: hci1: failed to register connection device [ 52.755798][ T5941] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci4/hci4:0' [ 52.755805][ T5941] CPU: 1 UID: 0 PID: 5941 Comm: kworker/u9:8 Tainted: G W syzkaller #0 PREEMPT [ 52.755814][ T5941] Tainted: [W]=WARN [ 52.755817][ T5941] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.755822][ T5941] Workqueue: hci4 hci_rx_work [ 52.755828][ T5941] Call trace: [ 52.755831][ T5941] show_stack+0x2c/0x3c (C) [ 52.755841][ T5941] __dump_stack+0x30/0x40 [ 52.755851][ T5941] dump_stack_lvl+0xd8/0x12c [ 52.755860][ T5941] dump_stack+0x1c/0x28 [ 52.755870][ T5941] sysfs_warn_dup+0x9c/0xb8 [ 52.755879][ T5941] sysfs_create_dir_ns+0x190/0x1f4 [ 52.755888][ T5941] kobject_add_internal+0x290/0x6f0 [ 52.755896][ T5941] kobject_add_varg+0x9c/0xe8 [ 52.755903][ T5941] kobject_add+0x110/0x1c8 [ 52.755910][ T5941] device_add+0x394/0x9e0 [ 52.755917][ T5941] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.755926][ T5941] le_conn_complete_evt+0xc68/0x10f8 [ 52.755934][ T5941] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.755942][ T5941] hci_le_meta_evt+0x2b0/0x46c [ 52.755951][ T5941] hci_event_packet+0x4c0/0x9c8 [ 52.755960][ T5941] hci_rx_work+0x2f4/0xd78 [ 52.755967][ T5941] process_scheduled_works+0x788/0x10b8 [ 52.755975][ T5941] worker_thread+0x798/0xbd0 [ 52.755984][ T5941] kthread+0x304/0x3d4 [ 52.755991][ T5941] ret_from_fork+0x10/0x20 [ 52.756003][ T5941] kobject: kobject_add_internal failed for hci4:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.756013][ T5941] Bluetooth: hci4: failed to register connection device [ 52.756080][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 52.756702][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.756712][ T5914] Tainted: [W]=WARN [ 52.756715][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.756720][ T5914] Workqueue: hci0 hci_rx_work [ 52.756727][ T5914] Call trace: [ 52.756729][ T5914] show_stack+0x2c/0x3c (C) [ 52.756740][ T5914] __dump_stack+0x30/0x40 [ 52.756749][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.756759][ T5914] dump_stack+0x1c/0x28 [ 52.756768][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.756777][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.756787][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.756794][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.756801][ T5914] kobject_add+0x110/0x1c8 [ 52.756808][ T5914] device_add+0x394/0x9e0 [ 52.756815][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.756824][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.756832][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.756840][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.756849][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.756858][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.756865][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.756873][ T5914] worker_thread+0x798/0xbd0 [ 52.756882][ T5914] kthread+0x304/0x3d4 [ 52.756889][ T5914] ret_from_fork+0x10/0x20 [ 52.756901][ T5914] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.756911][ T5914] Bluetooth: hci0: failed to register connection device [ 52.762438][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:0' [ 52.762448][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.762459][ T5914] Tainted: [W]=WARN [ 52.762462][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.762467][ T5914] Workqueue: hci3 hci_rx_work [ 52.762477][ T5914] Call trace: [ 52.762479][ T5914] show_stack+0x2c/0x3c (C) [ 52.762496][ T5914] __dump_stack+0x30/0x40 [ 52.762507][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.762518][ T5914] dump_stack+0x1c/0x28 [ 52.762529][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.762539][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.762548][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.762557][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.762564][ T5914] kobject_add+0x110/0x1c8 [ 52.762571][ T5914] device_add+0x394/0x9e0 [ 52.762578][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.762587][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.762595][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.762604][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.762613][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.762621][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.762628][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.762637][ T5914] worker_thread+0x798/0xbd0 [ 52.762645][ T5914] kthread+0x304/0x3d4 [ 52.762653][ T5914] ret_from_fork+0x10/0x20 [ 52.762680][ T5914] kobject: kobject_add_internal failed for hci3:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.762694][ T5914] Bluetooth: hci3: failed to register connection device [ 52.764685][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 52.764696][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.764707][ T5914] Tainted: [W]=WARN [ 52.764710][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.764715][ T5914] Workqueue: hci0 hci_rx_work [ 52.764724][ T5914] Call trace: [ 52.764727][ T5914] show_stack+0x2c/0x3c (C) [ 52.764739][ T5914] __dump_stack+0x30/0x40 [ 52.764749][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.764759][ T5914] dump_stack+0x1c/0x28 [ 52.764769][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.764779][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.764789][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.764797][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.764804][ T5914] kobject_add+0x110/0x1c8 [ 52.764811][ T5914] device_add+0x394/0x9e0 [ 52.764818][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.764827][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.764836][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.764844][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.764854][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.764862][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.764869][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.764878][ T5914] worker_thread+0x798/0xbd0 [ 52.764886][ T5914] kthread+0x304/0x3d4 [ 52.764893][ T5914] ret_from_fork+0x10/0x20 [ 52.764905][ T5914] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.764916][ T5914] Bluetooth: hci0: failed to register connection device [ 52.768106][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci4/hci4:0' [ 52.768125][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.768139][ T5914] Tainted: [W]=WARN [ 52.768142][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.768149][ T5914] Workqueue: hci4 hci_rx_work [ 52.768160][ T5914] Call trace: [ 52.768163][ T5914] show_stack+0x2c/0x3c (C) [ 52.768175][ T5914] __dump_stack+0x30/0x40 [ 52.768185][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.768195][ T5914] dump_stack+0x1c/0x28 [ 52.768204][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.768214][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.768224][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.768232][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.768239][ T5914] kobject_add+0x110/0x1c8 [ 52.768246][ T5914] device_add+0x394/0x9e0 [ 52.768253][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.768263][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.768271][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.768279][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.768288][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.768297][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.768304][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.768313][ T5914] worker_thread+0x798/0xbd0 [ 52.768321][ T5914] kthread+0x304/0x3d4 [ 52.768329][ T5914] ret_from_fork+0x10/0x20 [ 52.768341][ T5914] kobject: kobject_add_internal failed for hci4:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.768352][ T5914] Bluetooth: hci4: failed to register connection device [ 52.788817][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci1/hci1:0' [ 52.788832][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.788844][ T5914] Tainted: [W]=WARN [ 52.788847][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.788853][ T5914] Workqueue: hci1 hci_rx_work [ 52.788868][ T5914] Call trace: [ 52.788872][ T5914] show_stack+0x2c/0x3c (C) [ 52.788888][ T5914] __dump_stack+0x30/0x40 [ 52.788899][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.788909][ T5914] dump_stack+0x1c/0x28 [ 52.788918][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.788929][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.788939][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.788948][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.788956][ T5914] kobject_add+0x110/0x1c8 [ 52.788963][ T5914] device_add+0x394/0x9e0 [ 52.788970][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.788980][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.788989][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.788997][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.789006][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.789015][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.789022][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.789032][ T5914] worker_thread+0x798/0xbd0 [ 52.789040][ T5914] kthread+0x304/0x3d4 [ 52.789048][ T5914] ret_from_fork+0x10/0x20 [ 52.789062][ T5914] kobject: kobject_add_internal failed for hci1:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.789082][ T5914] Bluetooth: hci1: failed to register connection device [ 52.811973][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:0' [ 52.811989][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.812002][ T5914] Tainted: [W]=WARN [ 52.812006][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.812012][ T5914] Workqueue: hci3 hci_rx_work [ 52.812026][ T5914] Call trace: [ 52.812030][ T5914] show_stack+0x2c/0x3c (C) [ 52.812044][ T5914] __dump_stack+0x30/0x40 [ 52.812055][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.812065][ T5914] dump_stack+0x1c/0x28 [ 52.812074][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.812085][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.812095][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.812104][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.812118][ T5914] kobject_add+0x110/0x1c8 [ 52.812125][ T5914] device_add+0x394/0x9e0 [ 52.812134][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.812144][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.812153][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.812162][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.812171][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.812180][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.812187][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.812196][ T5914] worker_thread+0x798/0xbd0 [ 52.812205][ T5914] kthread+0x304/0x3d4 [ 52.812213][ T5914] ret_from_fork+0x10/0x20 [ 52.812227][ T5914] kobject: kobject_add_internal failed for hci3:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.812240][ T5914] Bluetooth: hci3: failed to register connection device [ 52.814169][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci2/hci2:0' [ 52.814180][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.814191][ T5914] Tainted: [W]=WARN [ 52.814194][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.814199][ T5914] Workqueue: hci2 hci_rx_work [ 52.814209][ T5914] Call trace: [ 52.814211][ T5914] show_stack+0x2c/0x3c (C) [ 52.814224][ T5914] __dump_stack+0x30/0x40 [ 52.814234][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.814244][ T5914] dump_stack+0x1c/0x28 [ 52.814253][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.814263][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.814273][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.814281][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.814288][ T5914] kobject_add+0x110/0x1c8 [ 52.814295][ T5914] device_add+0x394/0x9e0 [ 52.814302][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.814312][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.814321][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.814329][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.814338][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.814347][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.814354][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.814363][ T5914] worker_thread+0x798/0xbd0 [ 52.814371][ T5914] kthread+0x304/0x3d4 [ 52.814379][ T5914] ret_from_fork+0x10/0x20 [ 52.814391][ T5914] kobject: kobject_add_internal failed for hci2:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.814401][ T5914] Bluetooth: hci2: failed to register connection device [ 52.822342][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci4/hci4:0' [ 52.822357][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.822371][ T5914] Tainted: [W]=WARN [ 52.822375][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.822381][ T5914] Workqueue: hci4 hci_rx_work [ 52.822392][ T5914] Call trace: [ 52.822395][ T5914] show_stack+0x2c/0x3c (C) [ 52.822409][ T5914] __dump_stack+0x30/0x40 [ 52.822420][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.822430][ T5914] dump_stack+0x1c/0x28 [ 52.822439][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.822451][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.822460][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.822469][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.822476][ T5914] kobject_add+0x110/0x1c8 [ 52.822483][ T5914] device_add+0x394/0x9e0 [ 52.822490][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.822500][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.822509][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.822517][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.822527][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.822535][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.822542][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.822552][ T5914] worker_thread+0x798/0xbd0 [ 52.822560][ T5914] kthread+0x304/0x3d4 [ 52.822568][ T5914] ret_from_fork+0x10/0x20 [ 52.822580][ T5914] kobject: kobject_add_internal failed for hci4:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.822591][ T5914] Bluetooth: hci4: failed to register connection device [ 52.833549][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci1/hci1:0' [ 52.833564][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.833576][ T5914] Tainted: [W]=WARN [ 52.833579][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.833585][ T5914] Workqueue: hci1 hci_rx_work [ 52.833598][ T5914] Call trace: [ 52.833601][ T5914] show_stack+0x2c/0x3c (C) [ 52.833615][ T5914] __dump_stack+0x30/0x40 [ 52.833626][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.833636][ T5914] dump_stack+0x1c/0x28 [ 52.833645][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.833656][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.833665][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.833675][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.833682][ T5914] kobject_add+0x110/0x1c8 [ 52.833689][ T5914] device_add+0x394/0x9e0 [ 52.833696][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.833706][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.833715][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.833724][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.833733][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.833741][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.833748][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.833758][ T5914] worker_thread+0x798/0xbd0 [ 52.833766][ T5914] kthread+0x304/0x3d4 [ 52.833774][ T5914] ret_from_fork+0x10/0x20 [ 52.833788][ T5914] kobject: kobject_add_internal failed for hci1:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.833800][ T5914] Bluetooth: hci1: failed to register connection device [ 52.836476][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 52.836486][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.836497][ T5914] Tainted: [W]=WARN [ 52.836500][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.836505][ T5914] Workqueue: hci0 hci_rx_work [ 52.836514][ T5914] Call trace: [ 52.836517][ T5914] show_stack+0x2c/0x3c (C) [ 52.836529][ T5914] __dump_stack+0x30/0x40 [ 52.836540][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.836550][ T5914] dump_stack+0x1c/0x28 [ 52.836559][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.836570][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.836579][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.836587][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.836594][ T5914] kobject_add+0x110/0x1c8 [ 52.836601][ T5914] device_add+0x394/0x9e0 [ 52.836608][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.836618][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.836627][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.836635][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.836645][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.836654][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.836660][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.836669][ T5914] worker_thread+0x798/0xbd0 [ 52.836678][ T5914] kthread+0x304/0x3d4 [ 52.836685][ T5914] ret_from_fork+0x10/0x20 [ 52.836697][ T5914] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.836708][ T5914] Bluetooth: hci0: failed to register connection device [ 52.869416][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci4/hci4:0' [ 52.869432][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.869445][ T5914] Tainted: [W]=WARN [ 52.869449][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.869454][ T5914] Workqueue: hci4 hci_rx_work [ 52.869468][ T5914] Call trace: [ 52.869471][ T5914] show_stack+0x2c/0x3c (C) [ 52.869486][ T5914] __dump_stack+0x30/0x40 [ 52.869497][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.869507][ T5914] dump_stack+0x1c/0x28 [ 52.869517][ T5914] sysfs_warn_dup+0x9c/0xb8 [ 52.869528][ T5914] sysfs_create_dir_ns+0x190/0x1f4 [ 52.869537][ T5914] kobject_add_internal+0x290/0x6f0 [ 52.869546][ T5914] kobject_add_varg+0x9c/0xe8 [ 52.869553][ T5914] kobject_add+0x110/0x1c8 [ 52.869561][ T5914] device_add+0x394/0x9e0 [ 52.869569][ T5914] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.869578][ T5914] le_conn_complete_evt+0xc68/0x10f8 [ 52.869587][ T5914] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.869596][ T5914] hci_le_meta_evt+0x2b0/0x46c [ 52.869605][ T5914] hci_event_packet+0x4c0/0x9c8 [ 52.869614][ T5914] hci_rx_work+0x2f4/0xd78 [ 52.869621][ T5914] process_scheduled_works+0x788/0x10b8 [ 52.869630][ T5914] worker_thread+0x798/0xbd0 [ 52.869639][ T5914] kthread+0x304/0x3d4 [ 52.869647][ T5914] ret_from_fork+0x10/0x20 [ 52.869660][ T5914] kobject: kobject_add_internal failed for hci4:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.869673][ T5914] Bluetooth: hci4: failed to register connection device [ 52.872899][ T5914] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci3/hci3:0' [ 52.872909][ T5914] CPU: 1 UID: 0 PID: 5914 Comm: kworker/u9:7 Tainted: G W syzkaller #0 PREEMPT [ 52.872920][ T5914] Tainted: [W]=WARN [ 52.872923][ T5914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.872928][ T5914] Workqueue: hci3 hci_rx_work [ 52.872938][ T5914] Call trace: [ 52.872941][ T5914] show_stack+0x2c/0x3c (C) [ 52.872953][ T5914] __dump_stack+0x30/0x40 [ 52.872963][ T5914] dump_stack_lvl+0xd8/0x12c [ 52.872973][