INFO: task kworker/0:4:6691 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:4     state:D stack:23000 pid:6691  tgid:6691  ppid:2      task_flags:0x4288060 flags:0x00080000
Workqueue: usb_hub_wq hub_event
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5325 [inline]
 __schedule+0x1798/0x4cc0 kernel/sched/core.c:6929
 __schedule_loop kernel/sched/core.c:7011 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:7026
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7083
 __mutex_lock_common kernel/locking/mutex.c:676 [inline]
 __mutex_lock+0x7e6/0x1350 kernel/locking/mutex.c:760
 class_mutex_constructor include/linux/mutex.h:228 [inline]
 __input_unregister_device+0x328/0x640 drivers/input/input.c:2187
 input_unregister_device+0x9b/0x100 drivers/input/input.c:2418
 usb_cleanup+0x7c/0x1e0 drivers/input/misc/yealink.c:793
 usb_disconnect+0x42/0x70 drivers/input/misc/yealink.c:811
 usb_unbind_interface+0x26e/0x910 drivers/usb/core/driver.c:458
 device_remove drivers/base/dd.c:571 [inline]
 __device_release_driver drivers/base/dd.c:1274 [inline]
 device_release_driver_internal+0x4d9/0x800 drivers/base/dd.c:1297
 bus_remove_device+0x34d/0x410 drivers/base/bus.c:579
 device_del+0x511/0x8e0 drivers/base/core.c:3878
 usb_disable_device+0x3e9/0x8a0 drivers/usb/core/message.c:1418
 usb_disconnect+0x330/0x950 drivers/usb/core/hub.c:2344
 hub_port_connect drivers/usb/core/hub.c:5406 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5706 [inline]
 port_event drivers/usb/core/hub.c:5870 [inline]
 hub_event+0x1cf5/0x4a20 drivers/usb/core/hub.c:5952
 process_one_work kernel/workqueue.c:3263 [inline]
 process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3346
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>

Showing all locks held in the system:
6 locks held by kworker/0:0/9:
 #0: 
ffff888021a89548 (
(wq_completion)usb_hub_wq
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3238 [inline]
, at: process_scheduled_works+0x9b4/0x17b0 kernel/workqueue.c:3346
 #1: ffffc900000e7ba0
 ((work_completion)(&hub->events)
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3239 [inline]
, at: process_scheduled_works+0x9ef/0x17b0 kernel/workqueue.c:3346
 #2: 
ffff888028118198
 (
&dev->mutex
){....}-{4:4}
, at: device_lock include/linux/device.h:914 [inline]
, at: hub_event+0x184/0x4a20 drivers/usb/core/hub.c:5898
 #3: 
ffff888078293198
 (
&dev->mutex
){....}-{4:4}
, at: device_lock include/linux/device.h:914 [inline]
, at: __device_attach+0x88/0x400 drivers/base/dd.c:1006
 #4: 
ffff8880314ff160
 (
&dev->mutex
){....}-{4:4}
, at: device_lock include/linux/device.h:914 [inline]
, at: __device_attach+0x88/0x400 drivers/base/dd.c:1006
 #5: 
ffffffff8ed594a8
 (
input_mutex
){+.+.}-{4:4}
, at: class_mutex_intr_constructor include/linux/mutex.h:230 [inline]
, at: input_register_device+0xa76/0x1140 drivers/input/input.c:2374
6 locks held by kworker/0:1/10:
 #0: 
ffff888021a89548
 (
(wq_completion)usb_hub_wq
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3238 [inline]
, at: process_scheduled_works+0x9b4/0x17b0 kernel/workqueue.c:3346
 #1: 
ffffc900000f7ba0
 (
(work_completion)(&hub->events)
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3239 [inline]
, at: process_scheduled_works+0x9ef/0x17b0 kernel/workqueue.c:3346
 #2: 
ffff888144fa8198
 (
&dev->mutex
){....}-{4:4}
, at: device_lock include/linux/device.h:914 [inline]
, at: hub_event+0x184/0x4a20 drivers/usb/core/hub.c:5898
 #3: 
ffff88807afea198
 (
&dev->mutex
){....}-{4:4}
, at: device_lock include/linux/device.h:914 [inline]
, at: __device_attach+0x88/0x400 drivers/base/dd.c:1006
 #4: 
ffff8880227af160
 (
&dev->mutex
){....}-{4:4}
, at: device_lock include/linux/device.h:914 [inline]
, at: __device_attach+0x88/0x400 drivers/base/dd.c:1006
 #5: 
ffffffff8ed594a8 (
input_mutex){+.+.}-{4:4}
, at: class_mutex_intr_constructor include/linux/mutex.h:230 [inline]
, at: input_register_device+0xa76/0x1140 drivers/input/input.c:2374
5 locks held by kworker/u8:1/13:
4 locks held by kworker/1:0/24:
1 lock held by khungtaskd/31:
 #0: ffffffff8df3d6a0
 (
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+0x2e/0x180 kernel/locking/lockdep.c:6775
6 locks held by kworker/0:3/1222:
 #0: 
ffff888021a89548
 (
(wq_completion)usb_hub_wq
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3238 [inline]
, at: process_scheduled_works+0x9b4/0x17b0 kernel/workqueue.c:3346
 #1: 
ffffc9000411fba0
 (
(work_completion)(&hub->events)
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3239 [inline]
, at: process_scheduled_works+0x9ef/0x17b0 kernel/workqueue.c:3346
 #2: 
ffff888027ff0198
 (
&dev->mutex
){....}-{4:4}
, at: device_lock include/linux/device.h:914 [inline]
, at: hub_event+0x184/0x4a20 drivers/usb/core/hub.c:5898
 #3: 
ffff888030d8a198
 (
&dev->mutex
){....}-{4:4}
, at: device_lock include/linux/device.h:914 [inline]
, at: __device_attach+0x88/0x400 drivers/base/dd.c:1006
 #4: 
ffff888030dab160
 (
&dev->mutex
){....}-{4:4}
, at: device_lock include/linux/device.h:914 [inline]
, at: __device_attach+0x88/0x400 drivers/base/dd.c:1006
 #5: 
ffffffff8ed594a8
 (input_mutex
){+.+.}-{4:4}
, at: class_mutex_intr_constructor include/linux/mutex.h:230 [inline]
, at: input_register_device+0xa76/0x1140 drivers/input/input.c:2374
2 locks held by getty/5588:
 #0: 
ffff8880334fd0a0
 (
&tty->ldisc_sem
){++++}-{0:0}
, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: 
ffffc9000332b2f0
 (
&ldata->atomic_read_lock
){+.+.}-{4:4}
, at: n_tty_read+0x43e/0x1400 drivers/tty/n_tty.c:2222
4 locks held by udevd/6293:
 #0: ffff888030c82668
 (
&p->lock
){+.+.}-{4:4}
, at: seq_read_iter+0xb7/0xe20 fs/seq_file.c:182
 #1: ffff888065b76488
 (&of->mutex
#2
){+.+.}-{4:4}
, at: kernfs_seq_start+0x5c/0x420 fs/kernfs/file.c:172
 #2: 
ffff888032b46e18
 (
kn->active
#31
){.+.+}-{0:0}
, at: kernfs_get_active_of fs/kernfs/file.c:80 [inline]
, at: kernfs_seq_start+0xb2/0x420 fs/kernfs/file.c:173
 #3: 
ffff888078293198
 (
&dev->mutex
){....}-{4:4}
, at: device_lock_interruptible include/linux/device.h:919 [inline]
, at: manufacturer_show+0x26/0xa0 drivers/usb/core/sysfs.c:142
4 locks held by udevd/6419:
 #0: 
ffff8880304c7b08
 (
&p->lock
){+.+.}-{4:4}
, at: seq_read_iter+0xb7/0xe20 fs/seq_file.c:182
 #1: 
ffff8880673db888
 (
&of->mutex
#2
){+.+.}-{4:4}
, at: kernfs_seq_start+0x5c/0x420 fs/kernfs/file.c:172
 #2: 
ffff8880315b7d28
 (kn->active
#31
){.+.+}-{0:0}
, at: kernfs_get_active_of fs/kernfs/file.c:80 [inline]
, at: kernfs_seq_start+0xb2/0x420 fs/kernfs/file.c:173
 #3: 
ffff888032d8d198
 (
&dev->mutex
){....}-{4:4}
, at: device_lock_interruptible include/linux/device.h:919 [inline]
, at: manufacturer_show+0x26/0xa0 drivers/usb/core/sysfs.c:142
4 locks held by udevd/6420:
 #0: ffff8880631578b8
 (
&p->lock
){+.+.}-{4:4}
, at: seq_read_iter+0xb7/0xe20 fs/seq_file.c:182
 #1: 
ffff8880614a2488
 (
&of->mutex
#2
){+.+.}-{4:4}
, at: kernfs_seq_start+0x5c/0x420 fs/kernfs/file.c:172
 #2: 
ffff8880322434b8
 (
kn->active
#31
){.+.+}-{0:0}
, at: kernfs_get_active_of fs/kernfs/file.c:80 [inline]
, at: kernfs_seq_start+0xb2/0x420 fs/kernfs/file.c:173
 #3: 
ffff88807afea198
 (
&dev->mutex
){....}-{4:4}
, at: device_lock_interruptible include/linux/device.h:919 [inline]
, at: manufacturer_show+0x26/0xa0 drivers/usb/core/sysfs.c:142
4 locks held by udevd/6473:
 #0: 
ffff888074cb6c30
 (
&p->lock
){+.+.}-{4:4}
, at: seq_read_iter+0xb7/0xe20 fs/seq_file.c:182
 #1: ffff88807b82b488
 (
&of->mutex
#2
){+.+.}-{4:4}
, at: kernfs_seq_start+0x5c/0x420 fs/kernfs/file.c:172
 #2: 
ffff8880684f7878
 (
kn->active
#31
){.+.+}-{0:0}
, at: kernfs_get_active_of fs/kernfs/file.c:80 [inline]
, at: kernfs_seq_start+0xb2/0x420 fs/kernfs/file.c:173
 #3: 
ffff888023886198
 (
&dev->mutex
){....}-{4:4}
, at: device_lock_interruptible include/linux/device.h:919 [inline]
, at: manufacturer_show+0x26/0xa0 drivers/usb/core/sysfs.c:142
7 locks held by kworker/1:6/6659:
6 locks held by kworker/0:4/6691:
 #0: 
ffff888021a89548
 (
(wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3238 [inline]
(wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0 kernel/workqueue.c:3346
 #1: ffffc90003d5fba0 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3239 [inline]
 #1: ffffc90003d5fba0 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0 kernel/workqueue.c:3346
 #2: ffff888144fc0198 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:914 [inline]
 #2: ffff888144fc0198 (&dev->mutex){....}-{4:4}, at: hub_event+0x184/0x4a20 drivers/usb/core/hub.c:5898
 #3: 
ffff888023886198
 (&dev->mutex
){....}-{4:4}
, at: device_lock include/linux/device.h:914 [inline]
, at: usb_disconnect+0xf8/0x950 drivers/usb/core/hub.c:2335
 #4: 
ffff888029fd2160
 (
&dev->mutex
){....}-{4:4}
, at: device_lock include/linux/device.h:914 [inline]
, at: __device_driver_lock drivers/base/dd.c:1096 [inline]
, at: device_release_driver_internal+0xb6/0x800 drivers/base/dd.c:1294
 #5: 
ffffffff8ed594a8
 (
input_mutex
){+.+.}-{4:4}
, at: class_mutex_constructor include/linux/mutex.h:228 [inline]
, at: __input_unregister_device+0x328/0x640 drivers/input/input.c:2187
5 locks held by kworker/1:7/6703:
4 locks held by udevd/6763:
 #0: 
ffff88807c389668
 (&p->lock
){+.+.}-{4:4}
, at: seq_read_iter+0xb7/0xe20 fs/seq_file.c:182
 #1: 
ffff8880658fd088 (&of->mutex#2){+.+.}-{4:4}
, at: kernfs_seq_start+0x5c/0x420 fs/kernfs/file.c:172
 #2: ffff888031a79b48
 (
kn->active
#31
){.+.+}-{0:0}
, at: kernfs_get_active_of fs/kernfs/file.c:80 [inline]
, at: kernfs_seq_start+0xb2/0x420 fs/kernfs/file.c:173
 #3: 
ffff888030d8a198
 (
&dev->mutex
){....}-{4:4}
, at: device_lock_interruptible include/linux/device.h:919 [inline]
, at: manufacturer_show+0x26/0xa0 drivers/usb/core/sysfs.c:142
4 locks held by udevd/6795:
 #0: 
ffff888062d7c1c8
 (
&p->lock
){+.+.}-{4:4}
, at: seq_read_iter+0xb7/0xe20 fs/seq_file.c:182
 #1: 
ffff8880675ed888
 (
&of->mutex
#2
){+.+.}-{4:4}
, at: kernfs_seq_start+0x5c/0x420 fs/kernfs/file.c:172
 #2: ffff888063141e18
 (