------------[ cut here ]------------
workqueue: work disable count underflowed
WARNING: kernel/workqueue.c:4409 at work_offqd_enable kernel/workqueue.c:4409 [inline], CPU#1: kworker/1:2/718
WARNING: kernel/workqueue.c:4409 at enable_work+0x2d1/0x320 kernel/workqueue.c:4580, CPU#1: kworker/1:2/718
Modules linked in:
CPU: 1 UID: 0 PID: 718 Comm: kworker/1:2 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Workqueue: usb_hub_wq hub_event
RIP: 0010:work_offqd_enable kernel/workqueue.c:4409 [inline]
RIP: 0010:enable_work+0x2d1/0x320 kernel/workqueue.c:4580
Code: ff e8 a3 e4 33 00 e8 ae 94 ea 05 e9 61 ff ff ff e8 94 e4 33 00 90 0f 0b 90 e9 17 fe ff ff e8 86 e4 33 00 48 8d 3d 2f 13 73 09 <67> 48 0f b9 3a 45 31 f6 e9 36 fe ff ff 48 89 ef e8 3a b5 97 00 e9
RSP: 0018:ffffc900024decd0 EFLAGS: 00010083
RAX: 0000000000059e31 RBX: 0000000000000000 RCX: ffffc90011d24000
RDX: 0000000000100000 RSI: ffffffff817dd21a RDI: ffffffff8af0e550
RBP: ffff888109f59118 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 1ffff9200049bd9b R14: ffff888109f59000 R15: 0000000000000006
FS:  0000000000000000(0000) GS:ffff8882687d3000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2f4b3b CR3: 0000000120c12000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 __cancel_work_sync kernel/workqueue.c:4450 [inline]
 cancel_work_sync+0x96/0xf0 kernel/workqueue.c:4484
 smsusb_stop_streaming+0xaa/0x210 drivers/media/usb/siano/smsusb.c:183
 smsusb_term_device+0x8f/0x200 drivers/media/usb/siano/smsusb.c:345
 smsusb_init_device+0xb4e/0xbb0 drivers/media/usb/siano/smsusb.c:497
 smsusb_probe+0xd7f/0xe1f drivers/media/usb/siano/smsusb.c:575
 usb_probe_interface+0x303/0x8f0 drivers/usb/core/driver.c:396
 call_driver_probe drivers/base/dd.c:583 [inline]
 really_probe+0x241/0xa60 drivers/base/dd.c:661
 __driver_probe_device+0x1de/0x400 drivers/base/dd.c:803
 driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:833
 __device_attach_driver+0x1ff/0x3e0 drivers/base/dd.c:961
 bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:500
 __device_attach+0x1e4/0x4d0 drivers/base/dd.c:1033
 device_initial_probe+0xaf/0xd0 drivers/base/dd.c:1088
 bus_probe_device+0x64/0x160 drivers/base/bus.c:574
 device_add+0x11d9/0x1950 drivers/base/core.c:3689
 usb_set_configuration+0xd97/0x1c60 drivers/usb/core/message.c:2210
 usb_generic_driver_probe+0xa1/0xe0 drivers/usb/core/generic.c:250
 usb_probe_device+0xef/0x400 drivers/usb/core/driver.c:291
 call_driver_probe drivers/base/dd.c:583 [inline]
 really_probe+0x241/0xa60 drivers/base/dd.c:661
 __driver_probe_device+0x1de/0x400 drivers/base/dd.c:803
 driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:833
 __device_attach_driver+0x1ff/0x3e0 drivers/base/dd.c:961
 bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:500
 __device_attach+0x1e4/0x4d0 drivers/base/dd.c:1033
 device_initial_probe+0xaf/0xd0 drivers/base/dd.c:1088
 bus_probe_device+0x64/0x160 drivers/base/bus.c:574
 device_add+0x11d9/0x1950 drivers/base/core.c:3689
 usb_new_device.cold+0x685/0x115c 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+0x314d/0x4af0 drivers/usb/core/hub.c:5953
 process_one_work+0x9d7/0x1920 kernel/workqueue.c:3275
 process_scheduled_works kernel/workqueue.c:3358 [inline]
 worker_thread+0x5da/0xe40 kernel/workqueue.c:3439
 kthread+0x370/0x450 kernel/kthread.c:467
 ret_from_fork+0x6c3/0xcb0 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
----------------
Code disassembly (best guess):
   0:	ff                   	ljmp   (bad)
   1:	e8 a3 e4 33 00       	call   0x33e4a9
   6:	e8 ae 94 ea 05       	call   0x5ea94b9
   b:	e9 61 ff ff ff       	jmp    0xffffff71
  10:	e8 94 e4 33 00       	call   0x33e4a9
  15:	90                   	nop
  16:	0f 0b                	ud2
  18:	90                   	nop
  19:	e9 17 fe ff ff       	jmp    0xfffffe35
  1e:	e8 86 e4 33 00       	call   0x33e4a9
  23:	48 8d 3d 2f 13 73 09 	lea    0x973132f(%rip),%rdi        # 0x9731359
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	45 31 f6             	xor    %r14d,%r14d
  32:	e9 36 fe ff ff       	jmp    0xfffffe6d
  37:	48 89 ef             	mov    %rbp,%rdi
  3a:	e8 3a b5 97 00       	call   0x97b579
  3f:	e9                   	.byte 0xe9