[ 7.594111][ T4397] 8021q: adding VLAN 0 to HW filter on device bond0 [ 7.596912][ T4397] eql: remember to turn off Van-Jacobson compression on your slave devices Starting crond: [ 7.631873][ T54] gve 0000:00:00.0 enp0s0: Device link is up. OK Starting sshd: OK syzkaller Warning: Permanently added '10.128.0.240' (ED25519) to the list of known hosts. 1970/01/01 00:00:34 parsed 1 programs 1970/01/01 00:00:34 serving rpc on tcp://34981 syzkaller login: [ 35.755015][ T4719] cgroup: Unknown subsys name 'net' [ 35.905198][ T4719] cgroup: Unknown subsys name 'cpuset' [ 35.906583][ T4719] cgroup: Unknown subsys name 'rlimit' Setting up swapspace version 1, size = 127995904 bytes [ 36.073106][ T4719] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k SS [ 38.736985][ T4731] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1 [ 38.737348][ T4731] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9 [ 38.737516][ T4731] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9 [ 38.737851][ T4731] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4 [ 38.738062][ T4731] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2 [ 38.817158][ T4729] soft_limit_in_bytes is deprecated and will be removed. Writing any value to this file has no effect. Please report your usecase to linux-mm@kvack.org if you depend on this functionality. [ 39.906486][ T4774] bridge0: port 1(bridge_slave_0) entered blocking state [ 39.906763][ T4774] bridge0: port 1(bridge_slave_0) entered disabled state [ 39.906828][ T4774] bridge_slave_0: entered allmulticast mode [ 39.907266][ T4774] bridge_slave_0: entered promiscuous mode [ 39.908409][ T4774] bridge0: port 2(bridge_slave_1) entered blocking state [ 39.908431][ T4774] bridge0: port 2(bridge_slave_1) entered disabled state [ 39.908477][ T4774] bridge_slave_1: entered allmulticast mode [ 39.908946][ T4774] bridge_slave_1: entered promiscuous mode [ 39.916370][ T4774] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 39.917291][ T4774] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 39.923444][ T4774] team0: Port device team_slave_0 added [ 39.926851][ T4774] team0: Port device team_slave_1 added [ 39.935269][ T4774] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 39.935281][ T4774] batman_adv: batadv0: The MTU of interface batadv_slave_0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1532 would solve the problem. [ 39.935294][ T4774] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 39.936054][ T4774] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 39.936061][ T4774] batman_adv: batadv0: The MTU of interface batadv_slave_1 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1532 would solve the problem. [ 39.936074][ T4774] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 39.946740][ T4774] hsr_slave_0: entered promiscuous mode [ 39.947083][ T4774] hsr_slave_1: entered promiscuous mode [ 39.991255][ T4774] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 39.993211][ T4774] 8021q: adding VLAN 0 to HW filter on device netdevsim0 [ 39.993987][ T4774] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 39.996243][ T4774] 8021q: adding VLAN 0 to HW filter on device netdevsim1 [ 39.996676][ T4774] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 39.998249][ T4774] 8021q: adding VLAN 0 to HW filter on device netdevsim2 [ 39.998850][ T4774] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 40.001113][ T4774] 8021q: adding VLAN 0 to HW filter on device netdevsim3 [ 40.013140][ T4774] bridge0: port 2(bridge_slave_1) entered blocking state [ 40.013175][ T4774] bridge0: port 2(bridge_slave_1) entered forwarding state [ 40.013308][ T4774] bridge0: port 1(bridge_slave_0) entered blocking state [ 40.013336][ T4774] bridge0: port 1(bridge_slave_0) entered forwarding state [ 40.029209][ T4774] 8021q: adding VLAN 0 to HW filter on device bond0 [ 40.032895][ T1101] bridge0: port 1(bridge_slave_0) entered disabled state [ 40.033336][ T1101] bridge0: port 2(bridge_slave_1) entered disabled state [ 40.040119][ T4774] 8021q: adding VLAN 0 to HW filter on device team0 [ 40.042557][ T1101] bridge0: port 1(bridge_slave_0) entered blocking state [ 40.042590][ T1101] bridge0: port 1(bridge_slave_0) entered forwarding state [ 40.047037][ T40] bridge0: port 2(bridge_slave_1) entered blocking state [ 40.047064][ T40] bridge0: port 2(bridge_slave_1) entered forwarding state [ 40.058574][ T4774] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 40.058592][ T4774] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 40.146243][ T4774] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 40.165976][ T4774] veth0_vlan: entered promiscuous mode [ 40.168237][ T4774] veth1_vlan: entered promiscuous mode [ 40.175843][ T4774] veth0_macvtap: entered promiscuous mode [ 40.177412][ T4774] veth1_macvtap: entered promiscuous mode [ 40.182464][ T4774] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 40.184132][ T4774] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 40.190099][ T54] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 40.204556][ T1101] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 40.204698][ T1101] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 40.204719][ T1101] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 40.279867][ T54] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 40.331433][ T54] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 40.388314][ T54] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 40.432058][ T40] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 40.432074][ T40] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 40.441312][ T54] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 40.450177][ T1101] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 40.450191][ T1101] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 1970/01/01 00:00:40 executed programs: 0 [ 40.677200][ T4731] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1 [ 40.677745][ T4731] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9 [ 40.678037][ T4731] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9 [ 40.678335][ T4731] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4 [ 40.678638][ T4731] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2 [ 40.816569][ T4828] bridge0: port 1(bridge_slave_0) entered blocking state [ 40.816652][ T4828] bridge0: port 1(bridge_slave_0) entered disabled state [ 40.816707][ T4828] bridge_slave_0: entered allmulticast mode [ 40.817128][ T4828] bridge_slave_0: entered promiscuous mode [ 40.822933][ T4828] bridge0: port 2(bridge_slave_1) entered blocking state [ 40.822985][ T4828] bridge0: port 2(bridge_slave_1) entered disabled state [ 40.823081][ T4828] bridge_slave_1: entered allmulticast mode [ 40.823478][ T4828] bridge_slave_1: entered promiscuous mode [ 40.831748][ T4828] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 40.832674][ T4828] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 40.841445][ T4828] team0: Port device team_slave_0 added [ 40.842159][ T4828] team0: Port device team_slave_1 added [ 40.847948][ T4828] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 40.847958][ T4828] batman_adv: batadv0: The MTU of interface batadv_slave_0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1532 would solve the problem. [ 40.847974][ T4828] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 40.848517][ T4828] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 40.848524][ T4828] batman_adv: batadv0: The MTU of interface batadv_slave_1 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1532 would solve the problem. [ 40.848538][ T4828] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 40.859412][ T4828] hsr_slave_0: entered promiscuous mode [ 40.859716][ T4828] hsr_slave_1: entered promiscuous mode [ 40.859914][ T4828] debugfs: 'hsr0' already exists in 'hsr' [ 40.859972][ T4828] Cannot create hsr debugfs directory [ 42.733914][ T50] Bluetooth: hci0: command tx timeout [ 43.588618][ T54] bridge_slave_1: left allmulticast mode [ 43.588646][ T54] bridge_slave_1: left promiscuous mode [ 43.588936][ T54] bridge0: port 2(bridge_slave_1) entered disabled state [ 43.590814][ T54] bridge_slave_0: left allmulticast mode [ 43.590828][ T54] bridge_slave_0: left promiscuous mode [ 43.590888][ T54] bridge0: port 1(bridge_slave_0) entered disabled state [ 43.645775][ T54] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 43.675518][ T54] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 43.694443][ T54] bond0 (unregistering): Released all slaves [ 43.746842][ T54] hsr_slave_0: left promiscuous mode [ 43.747236][ T54] hsr_slave_1: left promiscuous mode [ 43.747551][ T54] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 43.747565][ T54] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 43.748089][ T54] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 43.748098][ T54] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 43.751846][ T54] veth1_macvtap: left promiscuous mode [ 43.751878][ T54] veth0_macvtap: left promiscuous mode [ 43.751927][ T54] veth1_vlan: left promiscuous mode [ 43.751968][ T54] veth0_vlan: left promiscuous mode [ 43.852853][ T54] team0 (unregistering): Port device team_slave_1 removed [ 43.862532][ T54] team0 (unregistering): Port device team_slave_0 removed [ 43.907274][ T4397] 8021q: adding VLAN 0 to HW filter on device eth0 [ 44.131477][ T4828] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 44.138956][ T4828] 8021q: adding VLAN 0 to HW filter on device netdevsim0 [ 44.139351][ T4828] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 44.140978][ T4828] 8021q: adding VLAN 0 to HW filter on device netdevsim1 [ 44.228479][ T4828] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 44.229826][ T4828] 8021q: adding VLAN 0 to HW filter on device netdevsim2 [ 44.230419][ T4828] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 44.231331][ T4828] 8021q: adding VLAN 0 to HW filter on device netdevsim3 [ 44.276446][ T4828] 8021q: adding VLAN 0 to HW filter on device bond0 [ 44.282176][ T4828] 8021q: adding VLAN 0 to HW filter on device team0 [ 44.287090][ T14] bridge0: port 1(bridge_slave_0) entered blocking state [ 44.287115][ T14] bridge0: port 1(bridge_slave_0) entered forwarding state [ 44.290940][ T40] bridge0: port 2(bridge_slave_1) entered blocking state [ 44.290989][ T40] bridge0: port 2(bridge_slave_1) entered forwarding state [ 44.455610][ T4828] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 44.466631][ T4828] veth0_vlan: entered promiscuous mode [ 44.468431][ T4828] veth1_vlan: entered promiscuous mode [ 44.483100][ T4828] veth0_macvtap: entered promiscuous mode [ 44.485622][ T4828] veth1_macvtap: entered promiscuous mode [ 44.497957][ T4828] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 44.499733][ T4828] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 44.514370][ T14] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 44.514399][ T14] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 44.514416][ T14] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 44.514430][ T14] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 44.531021][ T14] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 44.531038][ T14] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 44.547129][ T14] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 44.547144][ T14] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 44.804046][ T4731] Bluetooth: hci0: command tx timeout [ 45.091401][ T4731] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 45.091416][ T4731] CPU: 0 UID: 0 PID: 4731 Comm: kworker/u9:1 Not tainted syzkaller #0 PREEMPT [ 45.091427][ T4731] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 45.091432][ T4731] Workqueue: hci0 hci_rx_work [ 45.091451][ T4731] Call trace: [ 45.091454][ T4731] show_stack+0x2c/0x3c (C) [ 45.091469][ T4731] __dump_stack+0x30/0x40 [ 45.091482][ T4731] dump_stack_lvl+0xd8/0x12c [ 45.091491][ T4731] dump_stack+0x1c/0x28 [ 45.091500][ T4731] sysfs_warn_dup+0x9c/0xb8 [ 45.091514][ T4731] sysfs_create_dir_ns+0x190/0x1f4 [ 45.091524][ T4731] kobject_add_internal+0x290/0x6f0 [ 45.091537][ T4731] kobject_add_varg+0x9c/0xe8 [ 45.091547][ T4731] kobject_add+0x110/0x1c8 [ 45.091557][ T4731] device_add+0x394/0x9e0 [ 45.091567][ T4731] hci_conn_add_sysfs+0xbc/0x1e8 [ 45.091575][ T4731] le_conn_complete_evt+0xc84/0x122c [ 45.091586][ T4731] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 45.091596][ T4731] hci_le_meta_evt+0x2b0/0x46c [ 45.091614][ T4731] hci_event_packet+0x4c0/0x9c8 [ 45.091621][ T4731] hci_rx_work+0x2f4/0xd78 [ 45.091630][ T4731] process_scheduled_works+0x91c/0x1250 [ 45.091640][ T4731] worker_thread+0x798/0xbd0 [ 45.091648][ T4731] kthread+0x304/0x3d4 [ 45.091656][ T4731] ret_from_fork+0x10/0x20 [ 45.091801][ T4731] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 45.091821][ T4731] Bluetooth: hci0: failed to register connection device [ 45.598444][ T4731] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 45.598458][ T4731] CPU: 0 UID: 0 PID: 4731 Comm: kworker/u9:1 Not tainted syzkaller #0 PREEMPT [ 45.598468][ T4731] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 45.598473][ T4731] Workqueue: hci0 hci_rx_work [ 45.598491][ T4731] Call trace: [ 45.598494][ T4731] show_stack+0x2c/0x3c (C) [ 45.598509][ T4731] __dump_stack+0x30/0x40 [ 45.598519][ T4731] dump_stack_lvl+0xd8/0x12c [ 45.598529][ T4731] dump_stack+0x1c/0x28 [ 45.598538][ T4731] sysfs_warn_dup+0x9c/0xb8 [ 45.598549][ T4731] sysfs_create_dir_ns+0x190/0x1f4 [ 45.598559][ T4731] kobject_add_internal+0x290/0x6f0 [ 45.598570][ T4731] kobject_add_varg+0x9c/0xe8 [ 45.598580][ T4731] kobject_add+0x110/0x1c8 [ 45.598589][ T4731] device_add+0x394/0x9e0 [ 45.598598][ T4731] hci_conn_add_sysfs+0xbc/0x1e8 [ 45.598615][ T4731] le_conn_complete_evt+0xc84/0x122c [ 45.598626][ T4731] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 45.598636][ T4731] hci_le_meta_evt+0x2b0/0x46c [ 45.598645][ T4731] hci_event_packet+0x4c0/0x9c8 [ 45.598654][ T4731] hci_rx_work+0x2f4/0xd78 [ 45.598662][ T4731] process_scheduled_works+0x91c/0x1250 [ 45.598671][ T4731] worker_thread+0x798/0xbd0 [ 45.598680][ T4731] kthread+0x304/0x3d4 [ 45.598687][ T4731] ret_from_fork+0x10/0x20 [ 45.598699][ T4731] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 45.598710][ T4731] Bluetooth: hci0: failed to register connection device [ 46.105136][ T4731] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 46.105151][ T4731] CPU: 0 UID: 0 PID: 4731 Comm: kworker/u9:1 Not tainted syzkaller #0 PREEMPT [ 46.105161][ T4731] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 46.105166][ T4731] Workqueue: hci0 hci_rx_work [ 46.105185][ T4731] Call trace: [ 46.105188][ T4731] show_stack+0x2c/0x3c (C) [ 46.105204][ T4731] __dump_stack+0x30/0x40 [ 46.105214][ T4731] dump_stack_lvl+0xd8/0x12c [ 46.105223][ T4731] dump_stack+0x1c/0x28 [ 46.105232][ T4731] sysfs_warn_dup+0x9c/0xb8 [ 46.105243][ T4731] sysfs_create_dir_ns+0x190/0x1f4 [ 46.105253][ T4731] kobject_add_internal+0x290/0x6f0 [ 46.105265][ T4731] kobject_add_varg+0x9c/0xe8 [ 46.105274][ T4731] kobject_add+0x110/0x1c8 [ 46.105284][ T4731] device_add+0x394/0x9e0 [ 46.105293][ T4731] hci_conn_add_sysfs+0xbc/0x1e8 [ 46.105301][ T4731] le_conn_complete_evt+0xc84/0x122c [ 46.105312][ T4731] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 46.105322][ T4731] hci_le_meta_evt+0x2b0/0x46c [ 46.105329][ T4731] hci_event_packet+0x4c0/0x9c8 [ 46.105336][ T4731] hci_rx_work+0x2f4/0xd78 [ 46.105345][ T4731] process_scheduled_works+0x91c/0x1250 [ 46.105354][ T4731] worker_thread+0x798/0xbd0 [ 46.105363][ T4731] kthread+0x304/0x3d4 [ 46.105370][ T4731] ret_from_fork+0x10/0x20 [ 46.105382][ T4731] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 46.105393][ T4731] Bluetooth: hci0: failed to register connection device 1970/01/01 00:00:46 executed programs: 5 [ 46.613030][ T4731] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 46.613046][ T4731] CPU: 0 UID: 0 PID: 4731 Comm: kworker/u9:1 Not tainted syzkaller #0 PREEMPT [ 46.613057][ T4731] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 46.613062][ T4731] Workqueue: hci0 hci_rx_work [ 46.613080][ T4731] Call trace: [ 46.613082][ T4731] show_stack+0x2c/0x3c (C) [ 46.613099][ T4731] __dump_stack+0x30/0x40 [ 46.613111][ T4731] dump_stack_lvl+0xd8/0x12c [ 46.613120][ T4731] dump_stack+0x1c/0x28 [ 46.613129][ T4731] sysfs_warn_dup+0x9c/0xb8 [ 46.613140][ T4731] sysfs_create_dir_ns+0x190/0x1f4 [ 46.613150][ T4731] kobject_add_internal+0x290/0x6f0 [ 46.613161][ T4731] kobject_add_varg+0x9c/0xe8 [ 46.613171][ T4731] kobject_add+0x110/0x1c8 [ 46.613181][ T4731] device_add+0x394/0x9e0 [ 46.613190][ T4731] hci_conn_add_sysfs+0xbc/0x1e8 [ 46.613198][ T4731] le_conn_complete_evt+0xc84/0x122c [ 46.613208][ T4731] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 46.613218][ T4731] hci_le_meta_evt+0x2b0/0x46c [ 46.613226][ T4731] hci_event_packet+0x4c0/0x9c8 [ 46.613233][ T4731] hci_rx_work+0x2f4/0xd78 [ 46.613242][ T4731] process_scheduled_works+0x91c/0x1250 [ 46.613251][ T4731] worker_thread+0x798/0xbd0 [ 46.613259][ T4731] kthread+0x304/0x3d4 [ 46.613267][ T4731] ret_from_fork+0x10/0x20 [ 46.613280][ T4731] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 46.613291][ T4731] Bluetooth: hci0: failed to register connection device [ 46.644455][ T4731] ------------[ cut here ]------------ [ 46.644466][ T4731] WARNING: net/bluetooth/hci_conn.c:641 at hci_conn_timeout+0xfc/0x20c, CPU#1: kworker/u9:1/4731 [ 46.646921][ T4731] Modules linked in: [ 46.647522][ T4731] CPU: 1 UID: 0 PID: 4731 Comm: kworker/u9:1 Not tainted syzkaller #0 PREEMPT [ 46.648887][ T4731] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 46.650475][ T4731] Workqueue: hci0 hci_conn_timeout [ 46.651311][ T4731] pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) [ 46.652518][ T4731] pc : hci_conn_timeout+0xfc/0x20c [ 46.653305][ T4731] lr : hci_conn_timeout+0xfc/0x20c [ 46.654162][ T4731] sp : ffff8000985b7b40 [ 46.654938][ T4731] x29: ffff8000985b7b40 x28: ffff0000ebc49800 x27: ffff0000d208ca50 [ 46.656399][ T4731] x26: dfff800000000000 x25: ffff0000da780000 x24: ffff0000ebc49808 [ 46.657822][ T4731] x23: ffff0000cdf7f968 x22: dfff800000000000 x21: 00000000ffffffff [ 46.659255][ T4731] x20: ffff0000d208ca50 x19: ffff0000d208c000 x18: 00000000ffffffff [ 46.660704][ T4731] x17: 0000000000000003 x16: ffff800088b97000 x15: ffff80008a849000 [ 46.662141][ T4731] x14: ffff80008b0812b0 x13: 0000000000000001 x12: 0000000000000000 [ 46.663549][ T4731] x11: 0000000000000000 x10: ffff60001a411803 x9 : 0000000000000000 [ 46.665010][ T4731] x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000 [ 46.666397][ T4731] x5 : ffff80008a8682f8 x4 : 0000000000000008 x3 : ffff800085bd1094 [ 46.667753][ T4731] x2 : 00000000ffffffff x1 : ffff0000da780000 x0 : 0000000000000000 [ 46.669180][ T4731] Call trace: [ 46.669732][ T4731] hci_conn_timeout+0xfc/0x20c (P) [ 46.670607][ T4731] process_scheduled_works+0x91c/0x1250 [ 46.671572][ T4731] worker_thread+0x798/0xbd0 [ 46.672360][ T4731] kthread+0x304/0x3d4 [ 46.673067][ T4731] ret_from_fork+0x10/0x20 [ 46.673811][ T4731] irq event stamp: 2090 [ 46.674490][ T4731] hardirqs last enabled at (2089): [] _raw_spin_unlock_irq+0x30/0x80 [ 46.676144][ T4731] hardirqs last disabled at (2090): [] el1_brk64+0x20/0x54 [ 46.677613][ T4731] softirqs last enabled at (2008): [] __alloc_skb+0x1c0/0x610 [ 46.679164][ T4731] softirqs last disabled at (2006): [] __alloc_skb+0x1a8/0x610 [ 46.680689][ T4731] ---[ end trace 0000000000000000 ]--- [ 46.883514][ T4731] Bluetooth: hci0: command 0x040f tx timeout [ 47.120436][ T4731] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 47.120453][ T4731] CPU: 1 UID: 0 PID: 4731 Comm: kworker/u9:1 Tainted: G W syzkaller #0 PREEMPT [ 47.120465][ T4731] Tainted: [W]=WARN [ 47.120468][ T4731] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 47.120472][ T4731] Workqueue: hci0 hci_rx_work [ 47.120489][ T4731] Call trace: [ 47.120491][ T4731] show_stack+0x2c/0x3c (C) [ 47.120505][ T4731] __dump_stack+0x30/0x40 [ 47.120514][ T4731] dump_stack_lvl+0xd8/0x12c [ 47.120524][ T4731] dump_stack+0x1c/0x28 [ 47.120533][ T4731] sysfs_warn_dup+0x9c/0xb8 [ 47.120544][ T4731] sysfs_create_dir_ns+0x190/0x1f4 [ 47.120554][ T4731] kobject_add_internal+0x290/0x6f0 [ 47.120565][ T4731] kobject_add_varg+0x9c/0xe8 [ 47.120575][ T4731] kobject_add+0x110/0x1c8 [ 47.120584][ T4731] device_add+0x394/0x9e0 [ 47.120593][ T4731] hci_conn_add_sysfs+0xbc/0x1e8 [ 47.120601][ T4731] le_conn_complete_evt+0xc84/0x122c [ 47.120611][ T4731] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 47.120629][ T4731] hci_le_meta_evt+0x2b0/0x46c [ 47.120637][ T4731] hci_event_packet+0x4c0/0x9c8 [ 47.120645][ T4731] hci_rx_work+0x2f4/0xd78 [ 47.120654][ T4731] process_scheduled_works+0x91c/0x1250 [ 47.120664][ T4731] worker_thread+0x798/0xbd0 [ 47.120672][ T4731] kthread+0x304/0x3d4 [ 47.120680][ T4731] ret_from_fork+0x10/0x20 [ 47.120691][ T4731] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 47.120703][ T4731] Bluetooth: hci0: failed to register connection device [ 47.627862][ T4731] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 47.627878][ T4731] CPU: 1 UID: 0 PID: 4731 Comm: kworker/u9:1 Tainted: G W syzkaller #0 PREEMPT [ 47.627890][ T4731] Tainted: [W]=WARN [ 47.627893][ T4731] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 47.627898][ T4731] Workqueue: hci0 hci_rx_work [ 47.627917][ T4731] Call trace: [ 47.627920][ T4731] show_stack+0x2c/0x3c (C) [ 47.627934][ T4731] __dump_stack+0x30/0x40 [ 47.627943][ T4731] dump_stack_lvl+0xd8/0x12c [ 47.627953][ T4731] dump_stack+0x1c/0x28 [ 47.627962][ T4731] sysfs_warn_dup+0x9c/0xb8 [ 47.627973][ T4731] sysfs_create_dir_ns+0x190/0x1f4 [ 47.627983][ T4731] kobject_add_internal+0x290/0x6f0 [ 47.627994][ T4731] kobject_add_varg+0x9c/0xe8 [ 47.628004][ T4731] kobject_add+0x110/0x1c8 [ 47.628013][ T4731] device_add+0x394/0x9e0 [ 47.628021][ T4731] hci_conn_add_sysfs+0xbc/0x1e8 [ 47.628030][ T4731] le_conn_complete_evt+0xc84/0x122c [ 47.628040][ T4731] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 47.628050][ T4731] hci_le_meta_evt+0x2b0/0x46c [ 47.628058][ T4731] hci_event_packet+0x4c0/0x9c8 [ 47.628065][ T4731] hci_rx_work+0x2f4/0xd78 [ 47.628073][ T4731] process_scheduled_works+0x91c/0x1250 [ 47.628083][ T4731] worker_thread+0x798/0xbd0 [ 47.628091][ T4731] kthread+0x304/0x3d4 [ 47.628098][ T4731] ret_from_fork+0x10/0x20 [ 47.628111][ T4731] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 47.628124][ T4731] Bluetooth: hci0: failed to register connection device [ 48.134440][ T4731] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 48.134458][ T4731] CPU: 1 UID: 0 PID: 4731 Comm: kworker/u9:1 Tainted: G W syzkaller #0 PREEMPT [ 48.134471][ T4731] Tainted: [W]=WARN [ 48.134475][ T4731] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 48.134480][ T4731] Workqueue: hci0 hci_rx_work [ 48.134495][ T4731] Call trace: [ 48.134498][ T4731] show_stack+0x2c/0x3c (C) [ 48.134512][ T4731] __dump_stack+0x30/0x40 [ 48.134522][ T4731] dump_stack_lvl+0xd8/0x12c [ 48.134531][ T4731] dump_stack+0x1c/0x28 [ 48.134540][ T4731] sysfs_warn_dup+0x9c/0xb8 [ 48.134551][ T4731] sysfs_create_dir_ns+0x190/0x1f4 [ 48.134561][ T4731] kobject_add_internal+0x290/0x6f0 [ 48.134573][ T4731] kobject_add_varg+0x9c/0xe8 [ 48.134582][ T4731] kobject_add+0x110/0x1c8 [ 48.134591][ T4731] device_add+0x394/0x9e0 [ 48.134600][ T4731] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.134608][ T4731] le_conn_complete_evt+0xc84/0x122c [ 48.134626][ T4731] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.134637][ T4731] hci_le_meta_evt+0x2b0/0x46c [ 48.134645][ T4731] hci_event_packet+0x4c0/0x9c8 [ 48.134652][ T4731] hci_rx_work+0x2f4/0xd78 [ 48.134661][ T4731] process_scheduled_works+0x91c/0x1250 [ 48.134671][ T4731] worker_thread+0x798/0xbd0 [ 48.134679][ T4731] kthread+0x304/0x3d4 [ 48.134687][ T4731] ret_from_fork+0x10/0x20 [ 48.134699][ T4731] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.134710][ T4731] Bluetooth: hci0: failed to register connection device [ 48.642271][ T4731] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 48.642288][ T4731] CPU: 1 UID: 0 PID: 4731 Comm: kworker/u9:1 Tainted: G W syzkaller #0 PREEMPT [ 48.642300][ T4731] Tainted: [W]=WARN [ 48.642303][ T4731] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 48.642307][ T4731] Workqueue: hci0 hci_rx_work [ 48.642323][ T4731] Call trace: [ 48.642326][ T4731] show_stack+0x2c/0x3c (C) [ 48.642340][ T4731] __dump_stack+0x30/0x40 [ 48.642349][ T4731] dump_stack_lvl+0xd8/0x12c [ 48.642359][ T4731] dump_stack+0x1c/0x28 [ 48.642368][ T4731] sysfs_warn_dup+0x9c/0xb8 [ 48.642379][ T4731] sysfs_create_dir_ns+0x190/0x1f4 [ 48.642389][ T4731] kobject_add_internal+0x290/0x6f0 [ 48.642400][ T4731] kobject_add_varg+0x9c/0xe8 [ 48.642410][ T4731] kobject_add+0x110/0x1c8 [ 48.642420][ T4731] device_add+0x394/0x9e0 [ 48.642428][ T4731] hci_conn_add_sysfs+0xbc/0x1e8 [ 48.642436][ T4731] le_conn_complete_evt+0xc84/0x122c [ 48.642447][ T4731] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 48.642457][ T4731] hci_le_meta_evt+0x2b0/0x46c [ 48.642464][ T4731] hci_event_packet+0x4c0/0x9c8 [ 48.642471][ T4731] hci_rx_work+0x2f4/0xd78 [ 48.642480][ T4731] process_scheduled_works+0x91c/0x1250 [ 48.642489][ T4731] worker_thread+0x798/0xbd0 [ 48.642498][ T4731] kthread+0x304/0x3d4 [ 48.642505][ T4731] ret_from_fork+0x10/0x20 [ 48.642517][ T4731] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 48.642529][ T4731] Bluetooth: hci0: failed to register connection device [ 48.963533][ T4731] Bluetooth: hci0: command 0x040f tx timeout [ 49.148937][ T4731] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 49.148956][ T4731] CPU: 0 UID: 0 PID: 4731 Comm: kworker/u9:1 Tainted: G W syzkaller #0 PREEMPT [ 49.148968][ T4731] Tainted: [W]=WARN [ 49.148971][ T4731] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 49.148975][ T4731] Workqueue: hci0 hci_rx_work [ 49.148994][ T4731] Call trace: [ 49.148996][ T4731] show_stack+0x2c/0x3c (C) [ 49.149011][ T4731] __dump_stack+0x30/0x40 [ 49.149021][ T4731] dump_stack_lvl+0xd8/0x12c [ 49.149030][ T4731] dump_stack+0x1c/0x28 [ 49.149039][ T4731] sysfs_warn_dup+0x9c/0xb8 [ 49.149050][ T4731] sysfs_create_dir_ns+0x190/0x1f4 [ 49.149060][ T4731] kobject_add_internal+0x290/0x6f0 [ 49.149072][ T4731] kobject_add_varg+0x9c/0xe8 [ 49.149081][ T4731] kobject_add+0x110/0x1c8 [ 49.149091][ T4731] device_add+0x394/0x9e0 [ 49.149100][ T4731] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.149108][ T4731] le_conn_complete_evt+0xc84/0x122c [ 49.149119][ T4731] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.149128][ T4731] hci_le_meta_evt+0x2b0/0x46c [ 49.149136][ T4731] hci_event_packet+0x4c0/0x9c8 [ 49.149143][ T4731] hci_rx_work+0x2f4/0xd78 [ 49.149152][ T4731] process_scheduled_works+0x91c/0x1250 [ 49.149161][ T4731] worker_thread+0x798/0xbd0 [ 49.149170][ T4731] kthread+0x304/0x3d4 [ 49.149177][ T4731] ret_from_fork+0x10/0x20 [ 49.149189][ T4731] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.149199][ T4731] Bluetooth: hci0: failed to register connection device [ 49.655520][ T4731] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 49.655538][ T4731] CPU: 0 UID: 0 PID: 4731 Comm: kworker/u9:1 Tainted: G W syzkaller #0 PREEMPT [ 49.655549][ T4731] Tainted: [W]=WARN [ 49.655552][ T4731] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 49.655557][ T4731] Workqueue: hci0 hci_rx_work [ 49.655573][ T4731] Call trace: [ 49.655575][ T4731] show_stack+0x2c/0x3c (C) [ 49.655590][ T4731] __dump_stack+0x30/0x40 [ 49.655600][ T4731] dump_stack_lvl+0xd8/0x12c [ 49.655616][ T4731] dump_stack+0x1c/0x28 [ 49.655626][ T4731] sysfs_warn_dup+0x9c/0xb8 [ 49.655637][ T4731] sysfs_create_dir_ns+0x190/0x1f4 [ 49.655648][ T4731] kobject_add_internal+0x290/0x6f0 [ 49.655659][ T4731] kobject_add_varg+0x9c/0xe8 [ 49.655669][ T4731] kobject_add+0x110/0x1c8 [ 49.655679][ T4731] device_add+0x394/0x9e0 [ 49.655688][ T4731] hci_conn_add_sysfs+0xbc/0x1e8 [ 49.655696][ T4731] le_conn_complete_evt+0xc84/0x122c [ 49.655706][ T4731] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 49.655716][ T4731] hci_le_meta_evt+0x2b0/0x46c [ 49.655724][ T4731] hci_event_packet+0x4c0/0x9c8 [ 49.655731][ T4731] hci_rx_work+0x2f4/0xd78 [ 49.655740][ T4731] process_scheduled_works+0x91c/0x1250 [ 49.655749][ T4731] worker_thread+0x798/0xbd0 [ 49.655757][ T4731] kthread+0x304/0x3d4 [ 49.655765][ T4731] ret_from_fork+0x10/0x20 [ 49.655776][ T4731] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 49.655789][ T4731] Bluetooth: hci0: failed to register connection device [ 50.164855][ T4731] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 50.164872][ T4731] CPU: 0 UID: 0 PID: 4731 Comm: kworker/u9:1 Tainted: G W syzkaller #0 PREEMPT [ 50.164886][ T4731] Tainted: [W]=WARN [ 50.164889][ T4731] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 50.164894][ T4731] Workqueue: hci0 hci_rx_work [ 50.164913][ T4731] Call trace: [ 50.164916][ T4731] show_stack+0x2c/0x3c (C) [ 50.164930][ T4731] __dump_stack+0x30/0x40 [ 50.164940][ T4731] dump_stack_lvl+0xd8/0x12c [ 50.164949][ T4731] dump_stack+0x1c/0x28 [ 50.164958][ T4731] sysfs_warn_dup+0x9c/0xb8 [ 50.164969][ T4731] sysfs_create_dir_ns+0x190/0x1f4 [ 50.164979][ T4731] kobject_add_internal+0x290/0x6f0 [ 50.164990][ T4731] kobject_add_varg+0x9c/0xe8 [ 50.165000][ T4731] kobject_add+0x110/0x1c8 [ 50.165010][ T4731] device_add+0x394/0x9e0 [ 50.165018][ T4731] hci_conn_add_sysfs+0xbc/0x1e8 [ 50.165026][ T4731] le_conn_complete_evt+0xc84/0x122c [ 50.165037][ T4731] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 50.165047][ T4731] hci_le_meta_evt+0x2b0/0x46c [ 50.165054][ T4731] hci_event_packet+0x4c0/0x9c8 [ 50.165061][ T4731] hci_rx_work+0x2f4/0xd78 [ 50.165070][ T4731] process_scheduled_works+0x91c/0x1250 [ 50.165079][ T4731] worker_thread+0x798/0xbd0 [ 50.165088][ T4731] kthread+0x304/0x3d4 [ 50.165095][ T4731] ret_from_fork+0x10/0x20 [ 50.165107][ T4731] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 50.165119][ T4731] Bluetooth: hci0: failed to register connection device [ 50.671382][ T4731] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 50.671399][ T4731] CPU: 0 UID: 0 PID: 4731 Comm: kworker/u9:1 Tainted: G W syzkaller #0 PREEMPT [ 50.671410][ T4731] Tainted: [W]=WARN [ 50.671413][ T4731] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 50.671418][ T4731] Workqueue: hci0 hci_rx_work [ 50.671433][ T4731] Call trace: [ 50.671436][ T4731] show_stack+0x2c/0x3c (C) [ 50.671449][ T4731] __dump_stack+0x30/0x40 [ 50.671458][ T4731] dump_stack_lvl+0xd8/0x12c [ 50.671468][ T4731] dump_stack+0x1c/0x28 [ 50.671476][ T4731] sysfs_warn_dup+0x9c/0xb8 [ 50.671487][ T4731] sysfs_create_dir_ns+0x190/0x1f4 [ 50.671497][ T4731] kobject_add_internal+0x290/0x6f0 [ 50.671509][ T4731] kobject_add_varg+0x9c/0xe8 [ 50.671518][ T4731] kobject_add+0x110/0x1c8 [ 50.671528][ T4731] device_add+0x394/0x9e0 [ 50.671536][ T4731] hci_conn_add_sysfs+0xbc/0x1e8 [ 50.671544][ T4731] le_conn_complete_evt+0xc84/0x122c [ 50.671555][ T4731] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 50.671565][ T4731] hci_le_meta_evt+0x2b0/0x46c [ 50.671572][ T4731] hci_event_packet+0x4c0/0x9c8 [ 50.671579][ T4731] hci_rx_work+0x2f4/0xd78 [ 50.671588][ T4731] process_scheduled_works+0x91c/0x1250 [ 50.671597][ T4731] worker_thread+0x798/0xbd0 [ 50.671612][ T4731] kthread+0x304/0x3d4 [ 50.671620][ T4731] ret_from_fork+0x10/0x20 [ 50.671635][ T4731] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 50.671651][ T4731] Bluetooth: hci0: failed to register connection device [ 51.045350][ T4731] Bluetooth: hci0: command 0x040f tx timeout [ 51.180166][ T4731] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 51.180184][ T4731] CPU: 1 UID: 0 PID: 4731 Comm: kworker/u9:1 Tainted: G W syzkaller #0 PREEMPT [ 51.180196][ T4731] Tainted: [W]=WARN [ 51.180199][ T4731] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 51.180204][ T4731] Workqueue: hci0 hci_rx_work [ 51.180223][ T4731] Call trace: [ 51.180226][ T4731] show_stack+0x2c/0x3c (C) [ 51.180239][ T4731] __dump_stack+0x30/0x40 [ 51.180249][ T4731] dump_stack_lvl+0xd8/0x12c [ 51.180259][ T4731] dump_stack+0x1c/0x28 [ 51.180268][ T4731] sysfs_warn_dup+0x9c/0xb8 [ 51.180279][ T4731] sysfs_create_dir_ns+0x190/0x1f4 [ 51.180288][ T4731] kobject_add_internal+0x290/0x6f0 [ 51.180300][ T4731] kobject_add_varg+0x9c/0xe8 [ 51.180310][ T4731] kobject_add+0x110/0x1c8 [ 51.180319][ T4731] device_add+0x394/0x9e0 [ 51.180328][ T4731] hci_conn_add_sysfs+0xbc/0x1e8 [ 51.180336][ T4731] le_conn_complete_evt+0xc84/0x122c [ 51.180347][ T4731] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 51.180357][ T4731] hci_le_meta_evt+0x2b0/0x46c [ 51.180364][ T4731] hci_event_packet+0x4c0/0x9c8 [ 51.180372][ T4731] hci_rx_work+0x2f4/0xd78 [ 51.180380][ T4731] process_scheduled_works+0x91c/0x1250 [ 51.180390][ T4731] worker_thread+0x798/0xbd0 [ 51.180398][ T4731] kthread+0x304/0x3d4 [ 51.180406][ T4731] ret_from_fork+0x10/0x20 [ 51.180417][ T4731] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 51.180429][ T4731] Bluetooth: hci0: failed to register connection device 1970/01/01 00:00:51 executed programs: 15 [ 51.686405][ T4731] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 51.686422][ T4731] CPU: 1 UID: 0 PID: 4731 Comm: kworker/u9:1 Tainted: G W syzkaller #0 PREEMPT [ 51.686434][ T4731] Tainted: [W]=WARN [ 51.686437][ T4731] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 51.686441][ T4731] Workqueue: hci0 hci_rx_work [ 51.686459][ T4731] Call trace: [ 51.686462][ T4731] show_stack+0x2c/0x3c (C) [ 51.686477][ T4731] __dump_stack+0x30/0x40 [ 51.686486][ T4731] dump_stack_lvl+0xd8/0x12c [ 51.686496][ T4731] dump_stack+0x1c/0x28 [ 51.686505][ T4731] sysfs_warn_dup+0x9c/0xb8 [ 51.686515][ T4731] sysfs_create_dir_ns+0x190/0x1f4 [ 51.686525][ T4731] kobject_add_internal+0x290/0x6f0 [ 51.686537][ T4731] kobject_add_varg+0x9c/0xe8 [ 51.686546][ T4731] kobject_add+0x110/0x1c8 [ 51.686556][ T4731] device_add+0x394/0x9e0 [ 51.686564][ T4731] hci_conn_add_sysfs+0xbc/0x1e8 [ 51.686572][ T4731] le_conn_complete_evt+0xc84/0x122c [ 51.686583][ T4731] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 51.686593][ T4731] hci_le_meta_evt+0x2b0/0x46c [ 51.686600][ T4731] hci_event_packet+0x4c0/0x9c8 [ 51.686608][ T4731] hci_rx_work+0x2f4/0xd78 [ 51.686624][ T4731] process_scheduled_works+0x91c/0x1250 [ 51.686634][ T4731] worker_thread+0x798/0xbd0 [ 51.686642][ T4731] kthread+0x304/0x3d4 [ 51.686650][ T4731] ret_from_fork+0x10/0x20 [ 51.686665][ T4731] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 51.686677][ T4731] Bluetooth: hci0: failed to register connection device [ 52.194850][ T4731] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 52.194866][ T4731] CPU: 1 UID: 0 PID: 4731 Comm: kworker/u9:1 Tainted: G W syzkaller #0 PREEMPT [ 52.194879][ T4731] Tainted: [W]=WARN [ 52.194882][ T4731] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 52.194886][ T4731] Workqueue: hci0 hci_rx_work [ 52.194904][ T4731] Call trace: [ 52.194907][ T4731] show_stack+0x2c/0x3c (C) [ 52.194922][ T4731] __dump_stack+0x30/0x40 [ 52.194932][ T4731] dump_stack_lvl+0xd8/0x12c [ 52.194942][ T4731] dump_stack+0x1c/0x28 [ 52.194950][ T4731] sysfs_warn_dup+0x9c/0xb8 [ 52.194961][ T4731] sysfs_create_dir_ns+0x190/0x1f4 [ 52.194971][ T4731] kobject_add_internal+0x290/0x6f0 [ 52.194983][ T4731] kobject_add_varg+0x9c/0xe8 [ 52.194992][ T4731] kobject_add+0x110/0x1c8 [ 52.195002][ T4731] device_add+0x394/0x9e0 [ 52.195010][ T4731] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.195019][ T4731] le_conn_complete_evt+0xc84/0x122c [ 52.195029][ T4731] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.195039][ T4731] hci_le_meta_evt+0x2b0/0x46c [ 52.195047][ T4731] hci_event_packet+0x4c0/0x9c8 [ 52.195054][ T4731] hci_rx_work+0x2f4/0xd78 [ 52.195063][ T4731] process_scheduled_works+0x91c/0x1250 [ 52.195072][ T4731] worker_thread+0x798/0xbd0 [ 52.195080][ T4731] kthread+0x304/0x3d4 [ 52.195088][ T4731] ret_from_fork+0x10/0x20 [ 52.195100][ T4731] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.195112][ T4731] Bluetooth: hci0: failed to register connection device [ 52.701006][ T4731] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 52.701022][ T4731] CPU: 1 UID: 0 PID: 4731 Comm: kworker/u9:1 Tainted: G W syzkaller #0 PREEMPT [ 52.701034][ T4731] Tainted: [W]=WARN [ 52.701037][ T4731] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 52.701041][ T4731] Workqueue: hci0 hci_rx_work [ 52.701058][ T4731] Call trace: [ 52.701061][ T4731] show_stack+0x2c/0x3c (C) [ 52.701075][ T4731] __dump_stack+0x30/0x40 [ 52.701085][ T4731] dump_stack_lvl+0xd8/0x12c [ 52.701094][ T4731] dump_stack+0x1c/0x28 [ 52.701103][ T4731] sysfs_warn_dup+0x9c/0xb8 [ 52.701115][ T4731] sysfs_create_dir_ns+0x190/0x1f4 [ 52.701125][ T4731] kobject_add_internal+0x290/0x6f0 [ 52.701138][ T4731] kobject_add_varg+0x9c/0xe8 [ 52.701147][ T4731] kobject_add+0x110/0x1c8 [ 52.701157][ T4731] device_add+0x394/0x9e0 [ 52.701166][ T4731] hci_conn_add_sysfs+0xbc/0x1e8 [ 52.701175][ T4731] le_conn_complete_evt+0xc84/0x122c [ 52.701186][ T4731] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 52.701196][ T4731] hci_le_meta_evt+0x2b0/0x46c [ 52.701203][ T4731] hci_event_packet+0x4c0/0x9c8 [ 52.701210][ T4731] hci_rx_work+0x2f4/0xd78 [ 52.701219][ T4731] process_scheduled_works+0x91c/0x1250 [ 52.701228][ T4731] worker_thread+0x798/0xbd0 [ 52.701236][ T4731] kthread+0x304/0x3d4 [ 52.701244][ T4731] ret_from_fork+0x10/0x20 [ 52.701255][ T4731] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 52.701266][ T4731] Bluetooth: hci0: failed to register connection device [ 53.123557][ T4731] Bluetooth: hci0: command 0x040f tx timeout [ 53.714260][ T4731] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 53.714276][ T4731] CPU: 1 UID: 0 PID: 4731 Comm: kworker/u9:1 Tainted: G W syzkaller #0 PREEMPT [ 53.714288][ T4731] Tainted: [W]=WARN [ 53.714291][ T4731] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 53.714295][ T4731] Workqueue: hci0 hci_rx_work [ 53.714311][ T4731] Call trace: [ 53.714314][ T4731] show_stack+0x2c/0x3c (C) [ 53.714327][ T4731] __dump_stack+0x30/0x40 [ 53.714337][ T4731] dump_stack_lvl+0xd8/0x12c [ 53.714346][ T4731] dump_stack+0x1c/0x28 [ 53.714355][ T4731] sysfs_warn_dup+0x9c/0xb8 [ 53.714366][ T4731] sysfs_create_dir_ns+0x190/0x1f4 [ 53.714376][ T4731] kobject_add_internal+0x290/0x6f0 [ 53.714387][ T4731] kobject_add_varg+0x9c/0xe8 [ 53.714397][ T4731] kobject_add+0x110/0x1c8 [ 53.714406][ T4731] device_add+0x394/0x9e0 [ 53.714415][ T4731] hci_conn_add_sysfs+0xbc/0x1e8 [ 53.714423][ T4731] le_conn_complete_evt+0xc84/0x122c [ 53.714433][ T4731] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 53.714443][ T4731] hci_le_meta_evt+0x2b0/0x46c [ 53.714451][ T4731] hci_event_packet+0x4c0/0x9c8 [ 53.714458][ T4731] hci_rx_work+0x2f4/0xd78 [ 53.714466][ T4731] process_scheduled_works+0x91c/0x1250 [ 53.714475][ T4731] worker_thread+0x798/0xbd0 [ 53.714484][ T4731] kthread+0x304/0x3d4 [ 53.714491][ T4731] ret_from_fork+0x10/0x20 [ 53.714503][ T4731] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 53.714514][ T4731] Bluetooth: hci0: failed to register connection device [ 54.221302][ T4731] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 54.221320][ T4731] CPU: 1 UID: 0 PID: 4731 Comm: kworker/u9:1 Tainted: G W syzkaller #0 PREEMPT [ 54.221334][ T4731] Tainted: [W]=WARN [ 54.221337][ T4731] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 54.221342][ T4731] Workqueue: hci0 hci_rx_work [ 54.221358][ T4731] Call trace: [ 54.221361][ T4731] show_stack+0x2c/0x3c (C) [ 54.221375][ T4731] __dump_stack+0x30/0x40 [ 54.221385][ T4731] dump_stack_lvl+0xd8/0x12c [ 54.221395][ T4731] dump_stack+0x1c/0x28 [ 54.221404][ T4731] sysfs_warn_dup+0x9c/0xb8 [ 54.221415][ T4731] sysfs_create_dir_ns+0x190/0x1f4 [ 54.221425][ T4731] kobject_add_internal+0x290/0x6f0 [ 54.221437][ T4731] kobject_add_varg+0x9c/0xe8 [ 54.221447][ T4731] kobject_add+0x110/0x1c8 [ 54.221456][ T4731] device_add+0x394/0x9e0 [ 54.221466][ T4731] hci_conn_add_sysfs+0xbc/0x1e8 [ 54.221474][ T4731] le_conn_complete_evt+0xc84/0x122c [ 54.221485][ T4731] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 54.221495][ T4731] hci_le_meta_evt+0x2b0/0x46c [ 54.221502][ T4731] hci_event_packet+0x4c0/0x9c8 [ 54.221509][ T4731] hci_rx_work+0x2f4/0xd78 [ 54.221518][ T4731] process_scheduled_works+0x91c/0x1250 [ 54.221527][ T4731] worker_thread+0x798/0xbd0 [ 54.221536][ T4731] kthread+0x304/0x3d4 [ 54.221543][ T4731] ret_from_fork+0x10/0x20 [ 54.221555][ T4731] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 54.221565][ T4731] Bluetooth: hci0: failed to register connection device [ 54.729473][ T4731] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 54.729490][ T4731] CPU: 1 UID: 0 PID: 4731 Comm: kworker/u9:1 Tainted: G W syzkaller #0 PREEMPT [ 54.729502][ T4731] Tainted: [W]=WARN [ 54.729505][ T4731] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 54.729509][ T4731] Workqueue: hci0 hci_rx_work [ 54.729528][ T4731] Call trace: [ 54.729531][ T4731] show_stack+0x2c/0x3c (C) [ 54.729547][ T4731] __dump_stack+0x30/0x40 [ 54.729557][ T4731] dump_stack_lvl+0xd8/0x12c [ 54.729566][ T4731] dump_stack+0x1c/0x28 [ 54.729575][ T4731] sysfs_warn_dup+0x9c/0xb8 [ 54.729586][ T4731] sysfs_create_dir_ns+0x190/0x1f4 [ 54.729596][ T4731] kobject_add_internal+0x290/0x6f0 [ 54.729608][ T4731] kobject_add_varg+0x9c/0xe8 [ 54.729626][ T4731] kobject_add+0x110/0x1c8 [ 54.729636][ T4731] device_add+0x394/0x9e0 [ 54.729646][ T4731] hci_conn_add_sysfs+0xbc/0x1e8 [ 54.729654][ T4731] le_conn_complete_evt+0xc84/0x122c [ 54.729665][ T4731] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 54.729675][ T4731] hci_le_meta_evt+0x2b0/0x46c [ 54.729682][ T4731] hci_event_packet+0x4c0/0x9c8 [ 54.729690][ T4731] hci_rx_work+0x2f4/0xd78 [ 54.729698][ T4731] process_scheduled_works+0x91c/0x1250 [ 54.729708][ T4731] worker_thread+0x798/0xbd0 [ 54.729716][ T4731] kthread+0x304/0x3d4 [ 54.729724][ T4731] ret_from_fork+0x10/0x20 [ 54.729736][ T4731] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 54.729747][ T4731] Bluetooth: hci0: failed to register connection device [ 55.203518][ T4731] Bluetooth: hci0: command 0x040f tx timeout [ 55.244240][ T4731] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 55.244256][ T4731] CPU: 0 UID: 0 PID: 4731 Comm: kworker/u9:1 Tainted: G W syzkaller #0 PREEMPT [ 55.244268][ T4731] Tainted: [W]=WARN [ 55.244271][ T4731] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 55.244276][ T4731] Workqueue: hci0 hci_rx_work [ 55.244295][ T4731] Call trace: [ 55.244298][ T4731] show_stack+0x2c/0x3c (C) [ 55.244314][ T4731] __dump_stack+0x30/0x40 [ 55.244326][ T4731] dump_stack_lvl+0xd8/0x12c [ 55.244336][ T4731] dump_stack+0x1c/0x28 [ 55.244344][ T4731] sysfs_warn_dup+0x9c/0xb8 [ 55.244357][ T4731] sysfs_create_dir_ns+0x190/0x1f4 [ 55.244367][ T4731] kobject_add_internal+0x290/0x6f0 [ 55.244380][ T4731] kobject_add_varg+0x9c/0xe8 [ 55.244389][ T4731] kobject_add+0x110/0x1c8 [ 55.244399][ T4731] device_add+0x394/0x9e0 [ 55.244407][ T4731] hci_conn_add_sysfs+0xbc/0x1e8 [ 55.244415][ T4731] le_conn_complete_evt+0xc84/0x122c [ 55.244426][ T4731] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 55.244436][ T4731] hci_le_meta_evt+0x2b0/0x46c [ 55.244443][ T4731] hci_event_packet+0x4c0/0x9c8 [ 55.244450][ T4731] hci_rx_work+0x2f4/0xd78 [ 55.244459][ T4731] process_scheduled_works+0x91c/0x1250 [ 55.244468][ T4731] worker_thread+0x798/0xbd0 [ 55.244477][ T4731] kthread+0x304/0x3d4 [ 55.244484][ T4731] ret_from_fork+0x10/0x20 [ 55.244496][ T4731] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 55.244507][ T4731] Bluetooth: hci0: failed to register connection device [ 55.742395][ T4731] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 55.742410][ T4731] CPU: 0 UID: 0 PID: 4731 Comm: kworker/u9:1 Tainted: G W syzkaller #0 PREEMPT [ 55.742421][ T4731] Tainted: [W]=WARN [ 55.742424][ T4731] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 55.742429][ T4731] Workqueue: hci0 hci_rx_work [ 55.742445][ T4731] Call trace: [ 55.742448][ T4731] show_stack+0x2c/0x3c (C) [ 55.742461][ T4731] __dump_stack+0x30/0x40 [ 55.742472][ T4731] dump_stack_lvl+0xd8/0x12c [ 55.742481][ T4731] dump_stack+0x1c/0x28 [ 55.742490][ T4731] sysfs_warn_dup+0x9c/0xb8 [ 55.742501][ T4731] sysfs_create_dir_ns+0x190/0x1f4 [ 55.742511][ T4731] kobject_add_internal+0x290/0x6f0 [ 55.742524][ T4731] kobject_add_varg+0x9c/0xe8 [ 55.742534][ T4731] kobject_add+0x110/0x1c8 [ 55.742543][ T4731] device_add+0x394/0x9e0 [ 55.742552][ T4731] hci_conn_add_sysfs+0xbc/0x1e8 [ 55.742560][ T4731] le_conn_complete_evt+0xc84/0x122c [ 55.742571][ T4731] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 55.742581][ T4731] hci_le_meta_evt+0x2b0/0x46c [ 55.742589][ T4731] hci_event_packet+0x4c0/0x9c8 [ 55.742596][ T4731] hci_rx_work+0x2f4/0xd78 [ 55.742609][ T4731] process_scheduled_works+0x91c/0x1250 [ 55.742619][ T4731] worker_thread+0x798/0xbd0 [ 55.742627][ T4731] kthread+0x304/0x3d4 [ 55.742636][ T4731] ret_from_fork+0x10/0x20 [ 55.742650][ T4731] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 55.742665][ T4731] Bluetooth: hci0: failed to register connection device [ 56.248839][ T4731] sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0' [ 56.248855][ T4731] CPU: 0 UID: 0 PID: 4731 Comm: kworker/u9:1 Tainted: G W syzkaller #0 PREEMPT [ 56.248866][ T4731] Tainted: [W]=WARN [ 56.248869][ T4731] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 [ 56.248874][ T4731] Workqueue: hci0 hci_rx_work [ 56.248889][ T4731] Call trace: [ 56.248892][ T4731] show_stack+0x2c/0x3c (C) [ 56.248905][ T4731] __dump_stack+0x30/0x40 [ 56.248915][ T4731] dump_stack_lvl+0xd8/0x12c [ 56.248924][ T4731] dump_stack+0x1c/0x28 [ 56.248933][ T4731] sysfs_warn_dup+0x9c/0xb8 [ 56.248944][ T4731] sysfs_create_dir_ns+0x190/0x1f4 [ 56.248954][ T4731] kobject_add_internal+0x290/0x6f0 [ 56.248966][ T4731] kobject_add_varg+0x9c/0xe8 [ 56.248975][ T4731] kobject_add+0x110/0x1c8 [ 56.248985][ T4731] device_add+0x394/0x9e0 [ 56.248994][ T4731] hci_conn_add_sysfs+0xbc/0x1e8 [ 56.249002][ T4731] le_conn_complete_evt+0xc84/0x122c [ 56.249012][ T4731] hci_le_enh_conn_complete_evt+0x114/0x3d8 [ 56.249022][ T4731] hci_le_meta_evt+0x2b0/0x46c [ 56.249030][ T4731] hci_event_packet+0x4c0/0x9c8 [ 56.249037][ T4731] hci_rx_work+0x2f4/0xd78 [ 56.249045][ T4731] process_scheduled_works+0x91c/0x1250 [ 56.249054][ T4731] worker_thread+0x798/0xbd0 [ 56.249063][ T4731] kthread+0x304/0x3d4 [ 56.249070][ T4731] ret_from_fork+0x10/0x20 [ 56.249082][ T4731] kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 56.249092][ T4731] Bluetooth: hci0: failed to register connection device 1970/01/01 00:00:56 executed programs: 25