------------[ cut here ]------------
workqueue: work disable count underflowed
WARNING: kernel/workqueue.c:4359 at work_offqd_enable kernel/workqueue.c:4359 [inline], CPU#0: kworker/0:4/5895
WARNING: kernel/workqueue.c:4359 at enable_work+0x1b3/0x220 kernel/workqueue.c:4530, CPU#0: kworker/0:4/5895
Modules linked in:
CPU: 0 UID: 0 PID: 5895 Comm: kworker/0:4 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: usb_hub_wq hub_event
RIP: 0010:work_offqd_enable kernel/workqueue.c:4359 [inline]
RIP: 0010:enable_work+0x1b3/0x220 kernel/workqueue.c:4530
Code: d3 3e 36 00 4d 85 f6 75 48 e8 c9 3e 36 00 eb 47 e8 c2 3e 36 00 90 0f 0b 90 e9 d0 fe ff ff e8 b4 3e 36 00 48 8d 3d 3d 55 fa 0d <67> 48 0f b9 3a e9 e6 fe ff ff e8 9e 3e 36 00 90 0f 0b 90 e9 1a ff
RSP: 0018:ffffc900044fea98 EFLAGS: 00010087
RAX: ffffffff818ab6cc RBX: 0000000000000000 RCX: 0000000000100000
RDX: ffffc9001b73d000 RSI: 00000000000b5a52 RDI: ffffffff8f850c10
RBP: 0000000000000000 R08: ffff8880b863a083 R09: 1ffff110170c7410
R10: dffffc0000000000 R11: ffffed10170c7411 R12: 1ffff110284d4e3f
R13: 0000000000800001 R14: ffff8881426a71f8 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff888125e1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c25000e CR3: 000000000dd3a000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 00000000000000fb DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __cancel_work_sync+0xf7/0x110 kernel/workqueue.c:4400
 smsusb_stop_streaming drivers/media/usb/siano/smsusb.c:183 [inline]
 smsusb_term_device+0xe2/0x3e0 drivers/media/usb/siano/smsusb.c:345
 smsusb_init_device drivers/media/usb/siano/smsusb.c:497 [inline]
 smsusb_probe+0x1a20/0x21f0 drivers/media/usb/siano/smsusb.c:575
 usb_probe_interface+0x668/0xc90 drivers/usb/core/driver.c:396
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x26d/0xad0 drivers/base/dd.c:659
 __driver_probe_device+0x18c/0x320 drivers/base/dd.c:801
 driver_probe_device+0x4f/0x240 drivers/base/dd.c:831
 __device_attach_driver+0x279/0x430 drivers/base/dd.c:959
 bus_for_each_drv+0x251/0x2e0 drivers/base/bus.c:500
 __device_attach+0x2b8/0x430 drivers/base/dd.c:1031
 device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1086
 bus_probe_device+0x12a/0x220 drivers/base/bus.c:574
 device_add+0x7b6/0xb80 drivers/base/core.c:3689
 usb_set_configuration+0x1a87/0x2110 drivers/usb/core/message.c:2210
 usb_generic_driver_probe+0x8d/0x150 drivers/usb/core/generic.c:250
 usb_probe_device+0x1c4/0x3c0 drivers/usb/core/driver.c:291
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x26d/0xad0 drivers/base/dd.c:659
 __driver_probe_device+0x18c/0x320 drivers/base/dd.c:801
 driver_probe_device+0x4f/0x240 drivers/base/dd.c:831
 __device_attach_driver+0x279/0x430 drivers/base/dd.c:959
 bus_for_each_drv+0x251/0x2e0 drivers/base/bus.c:500
 __device_attach+0x2b8/0x430 drivers/base/dd.c:1031
 device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1086
 bus_probe_device+0x12a/0x220 drivers/base/bus.c:574
 device_add+0x7b6/0xb80 drivers/base/core.c:3689
 usb_new_device+0xa39/0x1720 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+0x29b1/0x4ef0 drivers/usb/core/hub.c:5953
 process_one_work kernel/workqueue.c:3257 [inline]
 process_scheduled_works+0xad1/0x1770 kernel/workqueue.c:3340
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3421
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x510/0xa50 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>
----------------
Code disassembly (best guess):
   0:	d3 3e                	sarl   %cl,(%rsi)
   2:	36 00 4d 85          	ss add %cl,-0x7b(%rbp)
   6:	f6 75 48             	divb   0x48(%rbp)
   9:	e8 c9 3e 36 00       	call   0x363ed7
   e:	eb 47                	jmp    0x57
  10:	e8 c2 3e 36 00       	call   0x363ed7
  15:	90                   	nop
  16:	0f 0b                	ud2
  18:	90                   	nop
  19:	e9 d0 fe ff ff       	jmp    0xfffffeee
  1e:	e8 b4 3e 36 00       	call   0x363ed7
  23:	48 8d 3d 3d 55 fa 0d 	lea    0xdfa553d(%rip),%rdi        # 0xdfa5567
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	e9 e6 fe ff ff       	jmp    0xffffff1a
  34:	e8 9e 3e 36 00       	call   0x363ed7
  39:	90                   	nop
  3a:	0f 0b                	ud2
  3c:	90                   	nop
  3d:	e9                   	.byte 0xe9
  3e:	1a ff                	sbb    %bh,%bh