------------[ cut here ]------------
workqueue: work disable count underflowed
WARNING: kernel/workqueue.c:4413 at work_offqd_enable kernel/workqueue.c:4413 [inline], CPU#1: kworker/1:2/929
WARNING: kernel/workqueue.c:4413 at enable_work+0x1c7/0x230 kernel/workqueue.c:4584, CPU#1: kworker/1:2/929
Modules linked in:
CPU: 1 UID: 0 PID: 929 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:4413 [inline]
RIP: 0010:enable_work+0x1c7/0x230 kernel/workqueue.c:4584
Code: bf e4 37 00 4d 85 f6 75 48 e8 b5 e4 37 00 eb 47 e8 ae e4 37 00 90 0f 0b 90 e9 bc fe ff ff e8 a0 e4 37 00 48 8d 3d c9 d4 a8 0e <67> 48 0f b9 3a e9 d2 fe ff ff e8 8a e4 37 00 90 0f 0b 90 e9 1d ff
RSP: 0018:ffffc900049b6b58 EFLAGS: 00010083
RAX: ffffffff818e11b0 RBX: 0000000000000000 RCX: 0000000000100000
RDX: ffffc90016cff000 RSI: 00000000000251b8 RDI: ffffffff9036e680
RBP: 0000000000000000 R08: ffff8880b853a483 R09: 1ffff110170a7490
R10: dffffc0000000000 R11: ffffed10170a7491 R12: 1ffff1100525d677
R13: 0000000001800001 R14: ffff8880292eb3b8 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff888125102000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000563bb4dc0010 CR3: 0000000063efc000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 __cancel_work_sync+0xf7/0x110 kernel/workqueue.c:4454
 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+0x1aba/0x2280 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+0x267/0xaf0 drivers/base/dd.c:661
 __driver_probe_device+0x18c/0x320 drivers/base/dd.c:803
 driver_probe_device+0x4f/0x240 drivers/base/dd.c:833
 __device_attach_driver+0x2d4/0x4c0 drivers/base/dd.c:961
 bus_for_each_drv+0x258/0x2f0 drivers/base/bus.c:500
 __device_attach+0x2c5/0x450 drivers/base/dd.c:1033
 device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1088
 bus_probe_device+0x12a/0x220 drivers/base/bus.c:574
 device_add+0x7b6/0xb70 drivers/base/core.c:3689
 usb_set_configuration+0x1a87/0x2110 drivers/usb/core/message.c:2208
 usb_generic_driver_probe+0x8d/0x150 drivers/usb/core/generic.c:250
 usb_probe_device+0x1c4/0x3b0 drivers/usb/core/driver.c:291
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x267/0xaf0 drivers/base/dd.c:661
 __driver_probe_device+0x18c/0x320 drivers/base/dd.c:803
 driver_probe_device+0x4f/0x240 drivers/base/dd.c:833
 __device_attach_driver+0x2d4/0x4c0 drivers/base/dd.c:961
 bus_for_each_drv+0x258/0x2f0 drivers/base/bus.c:500
 __device_attach+0x2c5/0x450 drivers/base/dd.c:1033
 device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1088
 bus_probe_device+0x12a/0x220 drivers/base/bus.c:574
 device_add+0x7b6/0xb70 drivers/base/core.c:3689
 usb_new_device+0xa08/0x16f0 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+0x2a1c/0x4f30 drivers/usb/core/hub.c:5953
 process_one_work+0x949/0x1650 kernel/workqueue.c:3279
 process_scheduled_works kernel/workqueue.c:3362 [inline]
 worker_thread+0xb46/0x1140 kernel/workqueue.c:3443
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x51e/0xb90 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:	bf e4 37 00 4d       	mov    $0x4d0037e4,%edi
   5:	85 f6                	test   %esi,%esi
   7:	75 48                	jne    0x51
   9:	e8 b5 e4 37 00       	call   0x37e4c3
   e:	eb 47                	jmp    0x57
  10:	e8 ae e4 37 00       	call   0x37e4c3
  15:	90                   	nop
  16:	0f 0b                	ud2
  18:	90                   	nop
  19:	e9 bc fe ff ff       	jmp    0xfffffeda
  1e:	e8 a0 e4 37 00       	call   0x37e4c3
  23:	48 8d 3d c9 d4 a8 0e 	lea    0xea8d4c9(%rip),%rdi        # 0xea8d4f3
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	e9 d2 fe ff ff       	jmp    0xffffff06
  34:	e8 8a e4 37 00       	call   0x37e4c3
  39:	90                   	nop
  3a:	0f 0b                	ud2
  3c:	90                   	nop
  3d:	e9                   	.byte 0xe9
  3e:	1d                   	.byte 0x1d
  3f:	ff                   	.byte 0xff