usb 9-1: USB disconnect, device number 5
------------[ cut here ]------------
workqueue: work disable count underflowed
WARNING: kernel/workqueue.c:4359 at work_offqd_enable kernel/workqueue.c:4359 [inline], CPU#3: kworker/3:3/6062
WARNING: kernel/workqueue.c:4359 at enable_work+0x2ca/0x310 kernel/workqueue.c:4530, CPU#3: kworker/3:3/6062
Modules linked in:
CPU: 3 UID: 0 PID: 6062 Comm: kworker/3:3 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: usb_hub_wq hub_event

RIP: 0010:work_offqd_enable kernel/workqueue.c:4359 [inline]
RIP: 0010:enable_work+0x2ca/0x310 kernel/workqueue.c:4530
Code: ff e8 fa 0d 3a 00 90 0f 0b 90 e9 b4 fe ff ff e8 ec 0d 3a 00 e8 17 29 f3 09 e9 49 ff ff ff e8 dd 0d 3a 00 48 8d 3d 36 cd 06 0f <67> 48 0f b9 3a e9 33 fe ff ff 48 89 ef e8 e4 e7 a3 00 e9 f7 fd ff
RSP: 0018:ffffc900042ff348 EFLAGS: 00010087
RAX: 000000000000aaaf RBX: 0000000000000000 RCX: ffffc9002f7ae000
RDX: 0000000000100000 RSI: ffffffff8184d8b3 RDI: ffffffff908ba5f0
RBP: ffff8880559c6738 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: ffff88802de8aff0 R12: 1ffff9200085fe6a
R13: ffffffff8fc4e7ff R14: ffff8880559c6698 R15: ffff8880559c6730
FS:  0000000000000000(0000) GS:ffff8880d6bf5000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f46f5447d58 CR3: 000000002e2dd000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 __cancel_work_sync kernel/workqueue.c:4400 [inline]
 cancel_delayed_work_sync+0x96/0xf0 kernel/workqueue.c:4471
 thermal_zone_device_unregister drivers/thermal/thermal_core.c:1719 [inline]
 thermal_zone_device_unregister+0x28e/0x4d0 drivers/thermal/thermal_core.c:1709
 psy_unregister_thermal drivers/power/supply/power_supply_core.c:1551 [inline]
 power_supply_unregister+0x10a/0x150 drivers/power/supply/power_supply_core.c:1767
 thunderstrike_destroy drivers/hid/hid-nvidia-shield.c:927 [inline]
 shield_remove+0x75/0x130 drivers/hid/hid-nvidia-shield.c:1104
 hid_device_remove+0xd1/0x260 drivers/hid/hid-core.c:2831
 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
 bus_remove_device+0x22f/0x450 drivers/base/bus.c:616
 device_del+0x396/0x9f0 drivers/base/core.c:3878
 hid_remove_device drivers/hid/hid-core.c:3008 [inline]
 hid_destroy_device+0x19c/0x240 drivers/hid/hid-core.c:3030
 usbhid_disconnect+0xa0/0xe0 drivers/hid/usbhid/hid-core.c:1462
 usb_unbind_interface+0x1dd/0x9e0 drivers/usb/core/driver.c:458
 device_remove drivers/base/dd.c:571 [inline]
 device_remove+0x125/0x170 drivers/base/dd.c:563
 __device_release_driver drivers/base/dd.c:1282 [inline]
 device_release_driver_internal+0x44b/0x620 drivers/base/dd.c:1305
 bus_remove_device+0x22f/0x450 drivers/base/bus.c:616
 device_del+0x396/0x9f0 drivers/base/core.c:3878
 usb_disable_device+0x355/0x820 drivers/usb/core/message.c:1418
 usb_disconnect+0x2e1/0x9e0 drivers/usb/core/hub.c:2345
 hub_port_connect drivers/usb/core/hub.c:5407 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5707 [inline]
 port_event drivers/usb/core/hub.c:5871 [inline]
 hub_event+0x1d84/0x52f0 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
 </TASK>
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	e8 fa 0d 3a 00       	call   0x3a0dff
   5:	90                   	nop
   6:	0f 0b                	ud2
   8:	90                   	nop
   9:	e9 b4 fe ff ff       	jmp    0xfffffec2
   e:	e8 ec 0d 3a 00       	call   0x3a0dff
  13:	e8 17 29 f3 09       	call   0x9f3292f
  18:	e9 49 ff ff ff       	jmp    0xffffff66
  1d:	e8 dd 0d 3a 00       	call   0x3a0dff
  22:	48 8d 3d 36 cd 06 0f 	lea    0xf06cd36(%rip),%rdi        # 0xf06cd5f
* 29:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2e:	e9 33 fe ff ff       	jmp    0xfffffe66
  33:	48 89 ef             	mov    %rbp,%rdi
  36:	e8 e4 e7 a3 00       	call   0xa3e81f
  3b:	e9                   	.byte 0xe9
  3c:	f7 fd                	idiv   %ebp
  3e:	ff                   	.byte 0xff