INFO: task kworker/1:2:90 blocked for more than 149 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:2 state:D
running task
stack:22008 pid:90 tgid:90 ppid:2 task_flags:0x4208060 flags:0x00080000
Workqueue: usb_hub_wq hub_event
Call Trace:
context_switch kernel/sched/core.c:5256 [inline]
__schedule+0x1139/0x6150 kernel/sched/core.c:6863
preempt_schedule_common+0x44/0xc0 kernel/sched/core.c:7047
preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
_raw_spin_unlock_irqrestore+0x61/0x80 kernel/locking/spinlock.c:194
sock_def_readable+0x15b/0x5d0 net/core/sock.c:3611
__netlink_sendskb net/netlink/af_netlink.c:1263 [inline]
netlink_broadcast_deliver net/netlink/af_netlink.c:1399 [inline]
do_one_broadcast net/netlink/af_netlink.c:1488 [inline]
netlink_broadcast_filtered+0xaba/0xf90 net/netlink/af_netlink.c:1533
netlink_broadcast+0x39/0x50 net/netlink/af_netlink.c:1557
uevent_net_broadcast_untagged lib/kobject_uevent.c:331 [inline]
kobject_uevent_net_broadcast lib/kobject_uevent.c:410 [inline]
kobject_uevent_env+0xcbc/0x1920 lib/kobject_uevent.c:608
driver_bound+0x164/0x260 drivers/base/dd.c:422
really_probe+0x651/0xb20 drivers/base/dd.c:709
__driver_probe_device+0x1de/0x470 drivers/base/dd.c:801
driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:831
__device_attach_driver+0x1df/0x350 drivers/base/dd.c:959
bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:500
__device_attach+0x1e4/0x4e0 drivers/base/dd.c:1031
device_initial_probe+0xaa/0xc0 drivers/base/dd.c:1086
bus_probe_device+0x64/0x150 drivers/base/bus.c:574
device_add+0x116e/0x1980 drivers/base/core.c:3689
usb_new_device+0xd07/0x1a90 drivers/usb/core/hub.c:2695
hub_port_connect drivers/usb/core/hub.c:5567 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5707 [inline]
port_event drivers/usb/core/hub.c:5871 [inline]
hub_event+0x313a/0x52f0 drivers/usb/core/hub.c:5953
process_one_work+0x9ba/0x1b20 kernel/workqueue.c:3257
process_scheduled_works kernel/workqueue.c:3340 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3421
kthread+0x3c5/0x780 kernel/kthread.c:463
ret_from_fork+0x983/0xb10 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
INFO: task syz.0.2044:9794 blocked for more than 175 seconds.
Not tainted syzkaller #0
Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.2044 state:D
stack:27544 pid:9794 tgid:9794 ppid:6466 task_flags:0x40044c flags:0x00080003
Call Trace:
context_switch kernel/sched/core.c:5256 [inline]
__schedule+0x1139/0x6150 kernel/sched/core.c:6863
__schedule_loop kernel/sched/core.c:6945 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:6960
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7017
__mutex_lock_common kernel/locking/mutex.c:692 [inline]
__mutex_lock+0xc69/0x1ca0 kernel/locking/mutex.c:776
uevent_net_broadcast_untagged lib/kobject_uevent.c:317 [inline]
kobject_uevent_net_broadcast lib/kobject_uevent.c:410 [inline]
kobject_uevent_env+0xb88/0x1920 lib/kobject_uevent.c:608
device_remove+0xcb/0x170 drivers/base/dd.c:569
__device_release_driver drivers/base/dd.c:1282 [inline]
device_release_driver_internal+0x44b/0x620 drivers/base/dd.c:1305
driver_detach+0xd8/0x1b0 drivers/base/dd.c:1368
bus_remove_driver+0x13b/0x2e0 drivers/base/bus.c:784
driver_unregister+0x76/0xb0 drivers/base/driver.c:277
usb_gadget_unregister_driver+0x49/0x70 drivers/usb/gadget/udc/core.c:1751
raw_release+0x1ae/0x2b0 drivers/usb/gadget/legacy/raw_gadget.c:463
__fput+0x402/0xb70 fs/file_table.c:468
task_work_run+0x150/0x240 kernel/task_work.c:233
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0x87f/0x2bd0 kernel/exit.c:971
do_group_exit+0xd3/0x2a0 kernel/exit.c:1112
get_signal+0x2671/0x26d0 kernel/signal.c:3034
arch_do_signal_or_restart+0x8f/0x7e0 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:41 [inline]
exit_to_user_mode_loop+0x8c/0x540 kernel/entry/common.c:75
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
do_syscall_64+0x4ee/0xf80 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbda558f749
RSP: 002b:00007fff8462bb88 EFLAGS: 00000246
ORIG_RAX: 00000000000000ca
RAX: fffffffffffffdfc RBX: 000000000002f842 RCX: 00007fbda558f749
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fbda57e5fac
RBP: 0000000000000bea R08: 00007fbda637d000 R09: 000000018462be7f
R10: 00007fff8462bc80 R11: 0000000000000246 R12: 00007fbda57e5fac
R13: 00007fff8462bc80 R14: 000000000003042c R15: 00007fff8462bca0
INFO: task syz-executor:9815 blocked for more than 156 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D
stack:28504 pid:9815 tgid:9815 ppid:1 task_flags:0x400040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5256 [inline]
__schedule+0x1139/0x6150 kernel/sched/core.c:6863
__schedule_loop kernel/sched/core.c:6945 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:6960
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7017
__mutex_lock_common kernel/locking/mutex.c:692 [inline]
__mutex_lock+0xc69/0x1ca0 kernel/locking/mutex.c:776
uevent_net_broadcast_untagged lib/kobject_uevent.c:317 [inline]
kobject_uevent_net_broadcast lib/kobject_uevent.c:410 [inline]
kobject_uevent_env+0xb88/0x1920 lib/kobject_uevent.c:608
device_add+0x1103/0x1980 drivers/base/core.c:3670
hci_register_dev+0x328/0xce0 net/bluetooth/hci_core.c:2621
__vhci_create_device+0x357/0x880 drivers/bluetooth/hci_vhci.c:451
vhci_create_device drivers/bluetooth/hci_vhci.c:479 [inline]
vhci_get_user drivers/bluetooth/hci_vhci.c:536 [inline]
vhci_write+0x2c0/0x480 drivers/bluetooth/hci_vhci.c:616
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x7d3/0x11d0 fs/read_write.c:686
ksys_write+0x12a/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6e07b8e1c0
RSP: 002b:00007ffc29856d78 EFLAGS: 00000202
ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f6e07b8e1c0
RDX: 0000000000000002 RSI: 00007ffc29856d8a RDI: 00000000000000ca
RBP: 00007f6e07de67b8 R08: 0000000000000000 R09: 00007f6e0891d6c0
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000008
R13: 0000000000000003 R14: 00007ffc298570d8 R15: 0000000000000000
Showing all locks held in the system:
1 lock held by kworker/R-rcu_g/4:
#0: ffffffff8e27f128 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x27/0x420 kernel/workqueue.c:2672
5 locks held by kworker/0:0/9:
#0: ffff88801e2c7148 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x128d/0x1b20 kernel/workqueue.c:3232
#1:
ffffc900000e7c90
(
(work_completion)(&hub->events)
){+.+.}-{0:0}
, at: process_one_work+0x914/0x1b20 kernel/workqueue.c:3233
#2:
ffff8880296d0198
(
&dev->mutex
){....}-{4:4}
, at: device_lock include/linux/device.h:895 [inline]
, at: hub_event+0x1c0/0x52f0 drivers/usb/core/hub.c:5899
#3:
ffff888027fd0198
(
&dev->mutex
){....}-{4:4}
, at: device_lock include/linux/device.h:895 [inline]
, at: __device_attach+0x7e/0x4e0 drivers/base/dd.c:1006
#4:
ffffffff906c1728
(
uevent_sock_mutex
){+.+.}-{4:4}
, at: uevent_net_broadcast_untagged lib/kobject_uevent.c:317 [inline]
, at: kobject_uevent_net_broadcast lib/kobject_uevent.c:410 [inline]
, at: kobject_uevent_env+0xb88/0x1920 lib/kobject_uevent.c:608
2 locks held by kworker/0:1/10:
1 lock held by kworker/R-mm_pe/14:
#0:
ffffffff8e27f128
(
wq_pool_attach_mutex
){+.+.}-{4:4}
, at: worker_attach_to_pool+0x27/0x420 kernel/workqueue.c:2672
1 lock held by khungtaskd/31:
#0:
ffffffff8e3c96a0
(
rcu_read_lock
){....}-{1:3}
, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
, at: rcu_read_lock include/linux/rcupdate.h:867 [inline]
, at: debug_show_all_locks+0x36/0x1c0 kernel/locking/lockdep.c:6775
3 locks held by kworker/1:2/90:
2 locks held by kworker/0:2/942:
3 locks held by kworker/u8:11/3523:
#0: ffff88813ff69948 (
(wq_completion)events_unbound#2){+.+.}-{0:0}, at: process_one_work+0x128d/0x1b20 kernel/workqueue.c:3232
#1:
ffffc9000d0e7c90
(
(work_completion)(&pool->idle_cull_work)
){+.+.}-{0:0}
, at: process_one_work+0x914/0x1b20 kernel/workqueue.c:3233
#2:
ffffffff8e27f128
(
wq_pool_attach_mutex
){+.+.}-{4:4}
, at: idle_cull_fn+0x99/0x460 kernel/workqueue.c:2954
5 locks held by kworker/u8:12/3548:
2 locks held by getty/5572:
#0:
ffff88814e9a80a0
(
&tty->ldisc_sem
){++++}-{0:0}
, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1:
ffffc9000332b2f0
(
&ldata->atomic_read_lock
){+.+.}-{4:4}
, at: n_tty_read+0x41b/0x1510 drivers/tty/n_tty.c:2211
1 lock held by kworker/0:3/6264:
#0:
ffffffff8e27f128
(
wq_pool_attach_mutex
){+.+.}-{4:4}
, at: worker_attach_to_pool+0x27/0x420 kernel/workqueue.c:2672
3 locks held by kworker/u9:2/6387:
#0:
ffff888044cd0148
(
(wq_completion)hci6
){+.+.}-{0:0}
, at: process_one_work+0x128d/0x1b20 kernel/workqueue.c:3232
#1:
ffffc90002f67c90
((work_completion)(&hdev->power_on)
){+.+.}-{0:0}
, at: process_one_work+0x914/0x1b20 kernel/workqueue.c:3233
#2:
ffff88806048cec0
(
&hdev->req_lock
){+.+.}-{4:4}
, at: hci_dev_do_open+0x22/0xb0 net/bluetooth/hci_core.c:428
2 locks held by kworker/0:4/6447:
1 lock held by syz-executor/6462:
#0:
ffffffff906c1728
(
uevent_sock_mutex
){+.+.}-{4:4}
, at: uevent_net_broadcast_untagged lib/kobject_uevent.c:317 [inline]
, at: kobject_uevent_net_broadcast lib/kobject_uevent.c:410 [inline]
, at: kobject_uevent_env+0xb88/0x1920 lib/kobject_uevent.c:608
1 lock held by syz-executor/6466:
#0:
ffffffff906c1728
(
uevent_sock_mutex
){+.+.}-{4:4}
, at: uevent_net_broadcast_untagged lib/kobject_uevent.c:317 [inline]
, at: kobject_uevent_net_broadcast lib/kobject_uevent.c:410 [inline]
, at: kobject_uevent_env+0xb88/0x1920 lib/kobject_uevent.c:608
1 lock held by syz-executor/6469:
#0:
ffffffff906c1728
(
uevent_sock_mutex
){+.+.}-{4:4}
, at: uevent_net_broadcast_untagged lib/kobject_uevent.c:317 [inline]
, at: kobject_uevent_net_broadcast lib/kobject_uevent.c:410 [inline]
, at: kobject_uevent_env+0xb88/0x1920 lib/kobject_uevent.c:608
4 locks held by udevd/6470:
3 locks held by kworker/u9:5/6476:
#0:
ffff88804e8cb948
(
(wq_completion)hci5
){+.+.}-{0:0}
, at: process_one_work+0x128d/0x1b20 kernel/workqueue.c:3232
#1:
ffffc90003b6fc90
(
(work_completion)(&hdev->power_on)
){+.+.}-{0:0}
, at: process_one_work+0x914/0x1b20 kernel/workqueue.c:3233
#2:
ffff88807859cec0
(
&hdev->req_lock
){+.+.}-{4:4}
, at: hci_dev_do_open+0x22/0xb0 net/bluetooth/hci_core.c:428
1 lock held by kworker/R-wg-cr/6495:
#0:
ffffffff8e27f128
(
wq_pool_attach_mutex
){+.+.}-{4:4}
, at: worker_attach_to_pool+0x27/0x420 kernel/workqueue.c:2672
1 lock held by kworker/R-wg-cr/6496:
#0: ffffffff8e27f128 (
wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x27/0x420 kernel/workqueue.c:2672
1 lock held by kworker/R-wg-cr/6497:
#0:
ffffffff8e27f128
(
wq_pool_attach_mutex
){+.+.}-{4:4}
, at: worker_attach_to_pool+0x27/0x420 kernel/workqueue.c:2672
1 lock held by kworker/R-wg-cr/6499:
#0:
ffff8880b843ac98
(
&rq->__lock
){-.-.}-{2:2}
, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:639
1 lock held by kworker/R-wg-cr/6505:
#0:
ffffffff8e27f128
(
wq_pool_attach_mutex
){+.+.}-{4:4}
, at: worker_detach_from_pool kernel/workqueue.c:2730 [inline]
, at: rescuer_thread+0x69f/0xf10 kernel/workqueue.c:3560
1 lock held by kworker/1:5/6508:
4 locks held by kworker/0:7/6638:
#0: ffff88801e2c7148
(
(wq_completion)usb_hub_wq
){+.+.}-{0:0}
, at: process_one_work+0x128d/0x1b20 kernel/workqueue.c:3232
#1:
ffffc900033d7c90
(
(work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x914/0x1b20 kernel/workqueue.c:3233
#2:
ffff8880296a8198 (&dev->mutex
){....}-{4:4}, at: device_lock include/linux/device.h:895 [inline]
){....}-{4:4}, at: hub_event+0x1c0/0x52f0 drivers/usb/core/hub.c:5899
#3:
ffff88806186f878
(
kn->active
#31
){++++}-{0:0}
, at: __kernfs_remove+0x2b0/0x920 fs/kernfs/dir.c:1513
4 locks held by udevd/6685:
#0:
ffff88805fa3b1c8
(
&p->lock
){+.+.}-{4:4}
, at: seq_read_iter+0xe1/0x12d0 fs/seq_file.c:182
#1:
ffff88802aa18888
(
&of->mutex
#2){+.+.}-{4:4}
, at: kernfs_seq_start+0x4f/0x2a0 fs/kernfs/file.c:172
#2:
ffff88814e3f2d28
(
kn->active#31
){++++}-{0:0}
, at: kernfs_get_active_of fs/kernfs/file.c:80 [inline]
, at: kernfs_seq_start+0xbc/0x2a0 fs/kernfs/file.c:173
#3:
ffff888027fd0198 (&dev->mutex){....}-{4:4}, at: device_lock_interruptible include/linux/device.h:900 [inline]
ffff888027fd0198 (&dev->mutex){....}-{4:4}, at: manufacturer_show+0x26/0xa0 drivers/usb/core/sysfs.c:142
6 locks held by kworker/0:8/6825:
#0: ffff88801e2c7148 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x128d/0x1b20 kernel/workqueue.c:3232
#1: ffffc90003d7fc90 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x914/0x1b20 kernel/workqueue.c:3233
#2: ffff888144356198 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:895 [inline]
#2: ffff888144356198 (&dev->mutex){....}-{4:4}, at: hub_event+0x1c0/0x52f0 drivers/usb/core/hub.c:5899
#3: ffff8881443e3518 (&port_dev->status_lock){+.+.}-{4:4}, at: usb_lock_port drivers/usb/core/hub.c:3252 [inline]
#3: ffff8881443e3518 (&port_dev->status_lock){+.+.}-{4:4}, at: hub_port_connect drivers/usb/core/hub.c:5464 [inline]
#3: ffff8881443e3518 (&port_dev->status_lock){+.+.}-{4:4}, at: hub_port_connect_change drivers/usb/core/hub.c:5707 [inline]
#3: ffff8881443e3518 (&port_dev->status_lock){+.+.}-{4:4}, at: port_event drivers/usb/core/hub.c:5871 [inline]
#3: ffff8881443e3518 (&port_dev->status_lock){+.+.}-{4:4}, at: hub_event+0x2b87/0x52f0 drivers/usb/core/hub.c:5953
#4: ffff8881423f4a68 (hcd->address0_mutex
){+.+.}-{4:4}
, at: hub_port_connect drivers/usb/core/hub.c:5465 [inline]
, at: hub_port_connect_change drivers/usb/core/hub.c:5707 [inline]
, at: port_event drivers/usb/core/hub.c:5871 [inline]
, at: hub_event+0x2bb0/0x52f0 drivers/usb/core/hub.c:5953
#5: ffffffff8f6fe870 (ehci_cf_port_reset_rwsem){.+.+}-{4:4}, at: hub_port_reset+0x1a1/0x1d50 drivers/usb/core/hub.c:3067
2 locks held by syz.2.2015/9737:
#0: ffff88814435cdc0 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:895 [inline]
#0: ffff88814435cdc0 (&dev->mutex){....}-{4:4}, at: __device_driver_lock drivers/base/dd.c:1104 [inline]
#0: ffff88814435cdc0 (&dev->mutex){....}-{4:4}, at: device_release_driver_internal+0xa4/0x620 drivers/base/dd.c:1302
#1: ffffffff906c1728 (uevent_sock_mutex){+.+.}-{4:4}, at: uevent_net_broadcast_untagged lib/kobject_uevent.c:317 [inline]
#1: ffffffff906c1728 (uevent_sock_mutex){+.+.}-{4:4}, at: kobject_uevent_net_broadcast lib/kobject_uevent.c:410 [inline]
#1: ffffffff906c1728 (uevent_sock_mutex){+.+.}-{4:4}, at: kobject_uevent_env+0xb88/0x1920 lib/kobject_uevent.c:608
2 locks held by syz.4.2049/9805:
#0: ffffffff9012b650 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x333/0x7c0 net/core/net_namespace.c:577
#1: ffffffff906c1728 (uevent_sock_mutex){+.+.}-{4:4}, at: uevent_net_init+0x210/0x350 lib/kobject_uevent.c:794
1 lock held by syz-executor/9811:
2 locks held by syz-executor/9814:
2 locks held by syz-executor/9815:
#0: ffff888046ea0918 (&data->open_mutex){+.+.}-{4:4}, at: vhci_create_device drivers/bluetooth/hci_vhci.c:478 [inline]
#0: ffff888046ea0918 (&data->open_mutex){+.+.}-{4:4}, at: vhci_get_user drivers/bluetooth/hci_vhci.c:536 [inline]
#0: ffff888046ea0918 (&data->open_mutex){+.+.}-{4:4}, at: vhci_write+0x2b4/0x480 drivers/bluetooth/hci_vhci.c:616
#1: ffffffff906c1728 (uevent_sock_mutex){+.+.}-{4:4}, at: uevent_net_broadcast_untagged lib/kobject_uevent.c:317 [inline]
#1: ffffffff906c1728 (uevent_sock_mutex){+.+.}-{4:4}, at: kobject_uevent_net_broadcast lib/kobject_uevent.c:410 [inline]
#1: ffffffff906c1728 (uevent_sock_mutex){+.+.}-{4:4}, at: kobject_uevent_env+0xb88/0x1920 lib/kobject_uevent.c:608
2 locks held by syz-executor/9825:
#0: ffff888050631118 (&data->open_mutex){+.+.}-{4:4}, at: vhci_create_device drivers/bluetooth/hci_vhci.c:478 [inline]
#0: ffff888050631118 (&data->open_mutex){+.+.}-{4:4}, at: vhci_get_user drivers/bluetooth/hci_vhci.c:536 [inline]
#0: ffff888050631118 (&data->open_mutex){+.+.}-{4:4}, at: vhci_write+0x2b4/0x480 drivers/bluetooth/hci_vhci.c:616
#1: ffffffff906c1728 (uevent_sock_mutex){+.+.}-{4:4}, at: uevent_net_broadcast_untagged lib/kobject_uevent.c:317 [inline]
#1: ffffffff906c1728 (uevent_sock_mutex){+.+.}-{4:4}, at: kobject_uevent_net_broadcast lib/kobject_uevent.c:410 [inline]
#1: ffffffff906c1728 (uevent_sock_mutex){+.+.}-{4:4}, at: kobject_uevent_env+0xb88/0x1920 lib/kobject_uevent.c:608
2 locks held by syz-executor/9827:
#0: ffff888046580918 (&data->open_mutex){+.+.}-{4:4}, at: vhci_create_device drivers/bluetooth/hci_vhci.c:478 [inline]
#0: ffff888046580918 (&data->open_mutex){+.+.}-{4:4}, at: vhci_get_user drivers/bluetooth/hci_vhci.c:536 [inline]
#0: ffff888046580918 (&data->open_mutex){+.+.}-{4:4}, at: vhci_write+0x2b4/0x480 drivers/bluetooth/hci_vhci.c:616
#1:
ffffffff906c1728
(
uevent_sock_mutex
){+.+.}-{4:4}
, at: uevent_net_broadcast_untagged lib/kobject_uevent.c:317 [inline]
, at: kobject_uevent_net_broadcast lib/kobject_uevent.c:410 [inline]
, at: kobject_uevent_env+0xb88/0x1920 lib/kobject_uevent.c:608
2 locks held by syz-executor/9829:
#0:
ffff888078f84118
(
&data->open_mutex
){+.+.}-{4:4}
, at: vhci_create_device drivers/bluetooth/hci_vhci.c:478 [inline]
, at: vhci_get_user drivers/bluetooth/hci_vhci.c:536 [inline]
, at: vhci_write+0x2b4/0x480 drivers/bluetooth/hci_vhci.c:616
#1:
ffffffff906c1728
(
uevent_sock_mutex
){+.+.}-{4:4}
, at: uevent_net_broadcast_untagged lib/kobject_uevent.c:317 [inline]
, at: kobject_uevent_net_broadcast lib/kobject_uevent.c:410 [inline]
, at: kobject_uevent_env+0xb88/0x1920 lib/kobject_uevent.c:608
2 locks held by syz-executor/9831:
#0:
ffff8880737a3118
(
&data->open_mutex
){+.+.}-{4:4}
, at: vhci_create_device drivers/bluetooth/hci_vhci.c:478 [inline]
, at: vhci_get_user drivers/bluetooth/hci_vhci.c:536 [inline]
, at: vhci_write+0x2b4/0x480 drivers/bluetooth/hci_vhci.c:616
#1:
ffffffff906c1728
(
uevent_sock_mutex
){+.+.}-{4:4}
, at: uevent_net_broadcast_untagged lib/kobject_uevent.c:317 [inline]
, at: kobject_uevent_net_broadcast lib/kobject_uevent.c:410 [inline]
, at: kobject_uevent_env+0xb88/0x1920 lib/kobject_uevent.c:608
2 locks held by syz-executor/9833:
#0:
ffff888050e07918
(
&data->open_mutex
){+.+.}-{4:4}
, at: vhci_create_device drivers/bluetooth/hci_vhci.c:478 [inline]
, at: vhci_get_user drivers/bluetooth/hci_vhci.c:536 [inline]
, at: vhci_write+0x2b4/0x480 drivers/bluetooth/hci_vhci.c:616
#1:
ffffffff906c1728 (uevent_sock_mutex){+.+.}-{4:4}, at: uevent_net_broadcast_untagged lib/kobject_uevent.c:317 [inline]
ffffffff906c1728 (uevent_sock_mutex){+.+.}-{4:4}, at: kobject_uevent_net_broadcast lib/kobject_uevent.c:410 [inline]
ffffffff906c1728 (uevent_sock_mutex){+.+.}-{4:4}, at: kobject_uevent_env+0xb88/0x1920 lib/kobject_uevent.c:608
2 locks held by dhcpcd/9834:
#0: ffff88807dad1908 (&sb->s_type->i_mutex_key#12){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1027 [inline]
#0: ffff88807dad1908 (&sb->s_type->i_mutex_key#12){+.+.}-{4:4}, at: __sock_release+0x86/0x270 net/socket.c:661
#1: ffffffff8e3d4df8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock+0x1a3/0x3c0 kernel/rcu/tree_exp.h:343
2 locks held by dhcpcd/9835:
#0: ffff88807dad2488 (&sb->s_type->i_mutex_key#12){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1027 [inline]
#0: ffff88807dad2488 (&sb->s_type->i_mutex_key#12){+.+.}-{4:4}, at: __sock_release+0x86/0x270 net/socket.c:661
#1: ffffffff8e3d4df8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock+0x1a3/0x3c0 kernel/rcu/tree_exp.h:343
1 lock held by dhcpcd/9836:
#0: ffff88807dad1ec8 (&sb->s_type->i_mutex_key#12){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1027 [inline]
#0: ffff88807dad1ec8 (&sb->s_type->i_mutex_key#12){+.+.}-{4:4}, at: __sock_release+0x86/0x270 net/socket.c:661
1 lock held by dhcpcd/9837:
#0: ffff88807dad63c8 (&sb->s_type->i_mutex_key#12){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1027 [inline]
#0: ffff88807dad63c8 (&sb->s_type->i_mutex_key#12){+.+.}-{4:4}, at: __sock_release+0x86/0x270 net/socket.c:661
1 lock held by dhcpcd/9838:
#0: ffff88807dad0208 (&sb->s_type->i_mutex_key#12){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1027 [inline]
#0: ffff88807dad0208 (&sb->s_type->i_mutex_key#12){+.+.}-{4:4}, at: __sock_release+0x86/0x270 net/socket.c:661
1 lock held by dhcpcd/9839:
#0: ffff888068a7f508 (&sb->s_type->i_mutex_key#12){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1027 [inline]
#0: ffff888068a7f508 (&sb->s_type->i_mutex_key#12){+.+.}-{4:4}, at: __sock_release+0x86/0x270 net/socket.c:661
2 locks held by syz-executor/9841:
#0: ffff88802ece7918 (&data->open_mutex){+.+.}-{4:4}, at: vhci_create_device drivers/bluetooth/hci_vhci.c:478 [inline]
#0: ffff88802ece7918 (&data->open_mutex){+.+.}-{4:4}, at: vhci_get_user drivers/bluetooth/hci_vhci.c:536 [inline]
#0: ffff88802ece7918 (&data->open_mutex){+.+.}-{4:4}, at: vhci_write+0x2b4/0x480 drivers/bluetooth/hci_vhci.c:616
#1: ffffffff906c1728 (uevent_sock_mutex){+.+.}-{4:4}
, at: uevent_net_broadcast_untagged lib/kobject_uevent.c:317 [inline]
, at: kobject_uevent_net_broadcast lib/kobject_uevent.c:410 [inline]
, at: kobject_uevent_env+0xb88/0x1920 lib/kobject_uevent.c:608
2 locks held by syz-executor/9843:
#0: ffff888077301118
(
&data->open_mutex
){+.+.}-{4:4}
, at: vhci_create_device drivers/bluetooth/hci_vhci.c:478 [inline]
, at: vhci_get_user drivers/bluetooth/hci_vhci.c:536 [inline]
, at: vhci_write+0x2b4/0x480 drivers/bluetooth/hci_vhci.c:616
#1:
ffffffff906c1728
(
uevent_sock_mutex
){+.+.}-{4:4}
, at: uevent_net_broadcast_untagged lib/kobject_uevent.c:317 [inline]
, at: kobject_uevent_net_broadcast lib/kobject_uevent.c:410 [inline]
, at: kobject_uevent_env+0xb88/0x1920 lib/kobject_uevent.c:608
2 locks held by syz-executor/9845:
#0:
ffff888028dbf118
(
&data->open_mutex){+.+.}-{4:4}
, at: vhci_create_device drivers/bluetooth/hci_vhci.c:478 [inline]
, at: vhci_get_user drivers/bluetooth/hci_vhci.c:536 [inline]
, at: vhci_write+0x2b4/0x480 drivers/bluetooth/hci_vhci.c:616
#1: ffffffff906c1728 (uevent_sock_mutex){+.+.}-{4:4}, at: uevent_net_broadcast_untagged lib/kobject_uevent.c:317 [inline]
#1: ffffffff906c1728 (uevent_sock_mutex){+.+.}-{4:4}, at: kobject_uevent_net_broadcast lib/kobject_uevent.c:410 [inline]
#1: ffffffff906c1728 (uevent_sock_mutex){+.+.}-{4:4}, at: kobject_uevent_env+0xb88/0x1920 lib/kobject_uevent.c:608
2 locks held by syz-executor/9847:
#0: ffff88807507c118 (&data->open_mutex){+.+.}-{4:4}, at: vhci_create_device drivers/bluetooth/hci_vhci.c:478 [inline]
#0: ffff88807507c118 (&data->open_mutex){+.+.}-{4:4}, at: vhci_get_user drivers/bluetooth/hci_vhci.c:536 [inline]
#0: ffff88807507c118 (&data->open_mutex){+.+.}-{4:4}, at: vhci_write+0x2b4/0x480 drivers/bluetooth/hci_vhci.c:616
#1: ffffffff906c1728 (uevent_sock_mutex){+.+.}-{4:4}, at: uevent_net_broadcast_untagged lib/kobject_uevent.c:317 [inline]
#1: ffffffff906c1728 (uevent_sock_mutex){+.+.}-{4:4}, at: kobject_uevent_net_broadcast lib/kobject_uevent.c:410 [inline]
#1: ffffffff906c1728 (uevent_sock_mutex){+.+.}-{4:4}, at: kobject_uevent_env+0xb88/0x1920 lib/kobject_uevent.c:608
2 locks held by syz-executor/9849:
#0: ffff888050fb6918 (&data->open_mutex){+.+.}-{4:4}, at: vhci_create_device drivers/bluetooth/hci_vhci.c:478 [inline]
#0: ffff888050fb6918 (&data->open_mutex){+.+.}-{4:4}, at: vhci_get_user drivers/bluetooth/hci_vhci.c:536 [inline]
#0: ffff888050fb6918 (&data->open_mutex){+.+.}-{4:4}, at: vhci_write+0x2b4/0x480 drivers/bluetooth/hci_vhci.c:616
#1: ffffffff906c1728 (uevent_sock_mutex){+.+.}-{4:4}, at: uevent_net_broadcast_untagged lib/kobject_uevent.c:317 [inline]
#1: ffffffff906c1728 (uevent_sock_mutex){+.+.}-{4:4}, at: kobject_uevent_net_broadcast lib/kobject_uevent.c:410 [inline]
#1: ffffffff906c1728 (uevent_sock_mutex){+.+.}-{4:4}, at: kobject_uevent_env+0xb88/0x1920 lib/kobject_uevent.c:608
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
__sys_info lib/sys_info.c:157 [inline]
sys_info+0x133/0x180 lib/sys_info.c:165
check_hung_uninterruptible_tasks kernel/hung_task.c:346 [inline]
watchdog+0xe66/0x1180 kernel/hung_task.c:515
kthread+0x3c5/0x780 kernel/kthread.c:463
ret_from_fork+0x983/0xb10 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
Sending NMI from CPU 1 to CPUs 0:
yealink 4-1:36.0: urb_ctl_callback - urb status -71
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 15 Comm: ksoftirqd/0 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:io_serial_in+0x87/0xb0 drivers/tty/serial/8250/8250_port.c:401
Code: 75 8c fc 48 8d 7d 40 44 89 e1 48 b8 00 00 00 00 00 fc ff df 48 89 fa d3 e3 48 c1 ea 03 80 3c 02 00 75 1a 66 03 5d 40 89 da ec <5b> 0f b6 c0 5d 41 5c e9 3d d0 48 06 e8 38 4a f6 fc eb a2 e8 c1 4a
RSP: 0018:ffffc90000147258 EFLAGS: 00000002
RAX: dffffc0000000000 RBX: 00000000000003fd RCX: 0000000000000000
RDX: 00000000000003fd RSI: ffffffff85327330 RDI: ffffffff9aeedc40
RBP: ffffffff9aeedc00 R08: 0000000000000001 R09: 000000000000001f
R10: 0000000000000000 R11: ffff88801d6e54b0 R12: 0000000000000000
R13: 0000000000000020 R14: fffffbfff35ddbda R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8881248f5000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f882ebf6d00 CR3: 00000000487f5000 CR4: 00000000003526f0
Call Trace:
serial_in drivers/tty/serial/8250/8250.h:128 [inline]
serial_lsr_in drivers/tty/serial/8250/8250.h:150 [inline]
wait_for_lsr+0x13a/0x210 drivers/tty/serial/8250/8250_port.c:1961
fifo_wait_for_lsr drivers/tty/serial/8250/8250_port.c:3234 [inline]
serial8250_console_fifo_write drivers/tty/serial/8250/8250_port.c:3257 [inline]
serial8250_console_write+0xf81/0x1890 drivers/tty/serial/8250/8250_port.c:3342
console_emit_next_record kernel/printk/printk.c:3129 [inline]
console_flush_one_record+0x796/0xc60 kernel/printk/printk.c:3215
console_flush_all kernel/printk/printk.c:3289 [inline]
__console_flush_and_unlock kernel/printk/printk.c:3319 [inline]
console_unlock+0xef/0x240 kernel/printk/printk.c:3359
vprintk_emit+0x407/0x6b0 kernel/printk/printk.c:2426
dev_vprintk_emit drivers/base/core.c:4914 [inline]
dev_printk_emit+0xfa/0x140 drivers/base/core.c:4925
__dev_printk+0xf5/0x270 drivers/base/core.c:4937
_dev_err+0xe4/0x120 drivers/base/core.c:4980
urb_ctl_callback+0x1eb/0x2f0 drivers/input/misc/yealink.c:456
__usb_hcd_giveback_urb+0x38b/0x610 drivers/usb/core/hcd.c:1661
usb_hcd_giveback_urb+0x39b/0x450 drivers/usb/core/hcd.c:1745
dummy_timer+0x1809/0x3ad0 drivers/usb/gadget/udc/dummy_hcd.c:1995
__run_hrtimer kernel/time/hrtimer.c:1777 [inline]
__hrtimer_run_queues+0x202/0xc40 kernel/time/hrtimer.c:1841
hrtimer_run_softirq+0x17d/0x350 kernel/time/hrtimer.c:1858
handle_softirqs+0x219/0x950 kernel/softirq.c:622
run_ksoftirqd kernel/softirq.c:1063 [inline]
run_ksoftirqd+0x3a/0x60 kernel/softirq.c:1055
smpboot_thread_fn+0x3f7/0xae0 kernel/smpboot.c:160
kthread+0x3c5/0x780 kernel/kthread.c:463
ret_from_fork+0x983/0xb10 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246