------------[ cut here ]------------
workqueue: work disable count underflowed
WARNING: kernel/workqueue.c:4530 at work_offqd_enable kernel/workqueue.c:4530 [inline], CPU#1: kworker/1:0/31
WARNING: kernel/workqueue.c:4530 at enable_work+0x1c7/0x230 kernel/workqueue.c:4701, CPU#1: kworker/1:0/31
Modules linked in:
CPU: 1 UID: 0 PID: 31 Comm: kworker/1:0 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
Workqueue: usb_hub_wq hub_event
RIP: 0010:work_offqd_enable kernel/workqueue.c:4530 [inline]
RIP: 0010:enable_work+0x1c7/0x230 kernel/workqueue.c:4701
Code: cf 19 38 00 4d 85 f6 75 48 e8 c5 19 38 00 eb 47 e8 be 19 38 00 90 0f 0b 90 e9 bc fe ff ff e8 b0 19 38 00 48 8d 3d 99 1c 26 0e <67> 48 0f b9 3a e9 d2 fe ff ff e8 9a 19 38 00 90 0f 0b 90 e9 1d ff
RSP: 0018:ffffc90000a5eae0 EFLAGS: 00010093
RAX: ffffffff818ebc00 RBX: 0000000000000000 RCX: ffff88801d2c0000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8fb4d8a0
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed10170e7719 R12: 1ffff11006c07c5b
R13: 0000000001800001 R14: ffff88803603e2d8 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff888125cc2000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055cbac78e1a8 CR3: 000000003f5e0000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 __cancel_work_sync+0xf8/0x110 kernel/workqueue.c:4571
 smsusb_stop_streaming drivers/media/usb/siano/smsusb.c:183 [inline]
 smsusb_term_device+0xdd/0x260 drivers/media/usb/siano/smsusb.c:345
 smsusb_init_device drivers/media/usb/siano/smsusb.c:499 [inline]
 smsusb_probe+0x1aba/0x2280 drivers/media/usb/siano/smsusb.c:577
 usb_probe_interface+0x788/0xe50 drivers/usb/core/driver.c:399
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x254/0xae0 drivers/base/dd.c:706
 __driver_probe_device+0x1e8/0x360 drivers/base/dd.c:868
 driver_probe_device+0x4f/0x240 drivers/base/dd.c:898
 __device_attach_driver+0x270/0x410 drivers/base/dd.c:1026
 bus_for_each_drv+0x25b/0x2f0 drivers/base/bus.c:500
 __device_attach+0x2c7/0x450 drivers/base/dd.c:1098
 device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1153
 bus_probe_device+0x12d/0x220 drivers/base/bus.c:620
 device_add+0x7d7/0xb80 drivers/base/core.c:3776
 usb_set_configuration+0x1bb5/0x2260 drivers/usb/core/message.c:2274
 usb_generic_driver_probe+0x8d/0x150 drivers/usb/core/generic.c:250
 usb_probe_device+0x1c3/0x3b0 drivers/usb/core/driver.c:293
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x254/0xae0 drivers/base/dd.c:706
 __driver_probe_device+0x1e8/0x360 drivers/base/dd.c:868
 driver_probe_device+0x4f/0x240 drivers/base/dd.c:898
 __device_attach_driver+0x270/0x410 drivers/base/dd.c:1026
 bus_for_each_drv+0x25b/0x2f0 drivers/base/bus.c:500
 __device_attach+0x2c7/0x450 drivers/base/dd.c:1098
 device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1153
 bus_probe_device+0x12d/0x220 drivers/base/bus.c:620
 device_add+0x7d7/0xb80 drivers/base/core.c:3776
 usb_new_device+0x99a/0x1680 drivers/usb/core/hub.c:2713
 hub_port_connect drivers/usb/core/hub.c:5585 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5725 [inline]
 port_event drivers/usb/core/hub.c:5889 [inline]
 hub_event+0x28cf/0x4cf0 drivers/usb/core/hub.c:5971
 process_one_work kernel/workqueue.c:3396 [inline]
 process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3479
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3560
 kthread+0x38b/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 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:	cf                   	iret
   1:	19 38                	sbb    %edi,(%rax)
   3:	00 4d 85             	add    %cl,-0x7b(%rbp)
   6:	f6 75 48             	divb   0x48(%rbp)
   9:	e8 c5 19 38 00       	call   0x3819d3
   e:	eb 47                	jmp    0x57
  10:	e8 be 19 38 00       	call   0x3819d3
  15:	90                   	nop
  16:	0f 0b                	ud2
  18:	90                   	nop
  19:	e9 bc fe ff ff       	jmp    0xfffffeda
  1e:	e8 b0 19 38 00       	call   0x3819d3
  23:	48 8d 3d 99 1c 26 0e 	lea    0xe261c99(%rip),%rdi        # 0xe261cc3
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	e9 d2 fe ff ff       	jmp    0xffffff06
  34:	e8 9a 19 38 00       	call   0x3819d3
  39:	90                   	nop
  3a:	0f 0b                	ud2
  3c:	90                   	nop
  3d:	e9                   	.byte 0xe9
  3e:	1d                   	.byte 0x1d
  3f:	ff                   	.byte 0xff