smsusb:smsusb_init_device: smscore_start_device(...) failed ------------[ cut here ]------------ workqueue: work disable count underflowed WARNING: CPU: 0 PID: 973 at kernel/workqueue.c:4326 work_offqd_enable kernel/workqueue.c:4326 [inline] WARNING: CPU: 0 PID: 973 at kernel/workqueue.c:4326 enable_work+0x2b1/0x2c0 kernel/workqueue.c:4497 Modules linked in: CPU: 0 UID: 0 PID: 973 Comm: kworker/0:2 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 Workqueue: usb_hub_wq hub_event RIP: 0010:work_offqd_enable kernel/workqueue.c:4326 [inline] RIP: 0010:enable_work+0x2b1/0x2c0 kernel/workqueue.c:4497 Code: 41 5e 41 5f 5d e9 4a cb 85 ff cc e8 29 e1 ef 09 e8 c4 37 35 00 c6 05 0b 17 03 0e 01 90 48 c7 c7 c0 e5 89 8b e8 80 d4 f8 ff 90 <0f> 0b 90 90 e9 69 ff ff ff 66 0f 1f 44 00 00 90 90 90 90 90 90 90 RSP: 0018:ffffc900037d6a80 EFLAGS: 00010046 RAX: 1ace09447878c300 RBX: ffff88807e663428 RCX: 0000000000100000 RDX: ffffc9001c080000 RSI: 00000000000b9343 RDI: 00000000000b9344 RBP: ffffc900037d6b30 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffffbfff1bfa22c R12: 1ffff920006fad54 R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000800001 FS: 0000000000000000(0000) GS:ffff888125c12000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b33417ff8 CR3: 0000000077fb7000 CR4: 0000000000350ef0 Call Trace: __cancel_work_sync+0xf7/0x110 kernel/workqueue.c:4367 smsusb_stop_streaming drivers/media/usb/siano/smsusb.c:183 [inline] smsusb_term_device+0xe2/0x3b0 drivers/media/usb/siano/smsusb.c:345 smsusb_init_device drivers/media/usb/siano/smsusb.c:497 [inline] smsusb_probe+0x1a04/0x2060 drivers/media/usb/siano/smsusb.c:575 usb_probe_interface+0x668/0xc30 drivers/usb/core/driver.c:396 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x26d/0x9e0 drivers/base/dd.c:659 __driver_probe_device+0x18c/0x2f0 drivers/base/dd.c:801 driver_probe_device+0x4f/0x430 drivers/base/dd.c:831 __device_attach_driver+0x2ce/0x530 drivers/base/dd.c:959 bus_for_each_drv+0x251/0x2e0 drivers/base/bus.c:462 __device_attach+0x2b8/0x400 drivers/base/dd.c:1031 bus_probe_device+0x185/0x260 drivers/base/bus.c:537 device_add+0x7b6/0xb50 drivers/base/core.c:3689 usb_set_configuration+0x1a87/0x20e0 drivers/usb/core/message.c:2210 usb_generic_driver_probe+0x8d/0x150 drivers/usb/core/generic.c:250 usb_probe_device+0x1c4/0x390 drivers/usb/core/driver.c:291 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x26d/0x9e0 drivers/base/dd.c:659 __driver_probe_device+0x18c/0x2f0 drivers/base/dd.c:801 driver_probe_device+0x4f/0x430 drivers/base/dd.c:831 __device_attach_driver+0x2ce/0x530 drivers/base/dd.c:959 bus_for_each_drv+0x251/0x2e0 drivers/base/bus.c:462 __device_attach+0x2b8/0x400 drivers/base/dd.c:1031 bus_probe_device+0x185/0x260 drivers/base/bus.c:537 device_add+0x7b6/0xb50 drivers/base/core.c:3689 usb_new_device+0xa39/0x16f0 drivers/usb/core/hub.c:2694 hub_port_connect drivers/usb/core/hub.c:5566 [inline] hub_port_connect_change drivers/usb/core/hub.c:5706 [inline] port_event drivers/usb/core/hub.c:5870 [inline] hub_event+0x2958/0x4a20 drivers/usb/core/hub.c:5952 process_one_work kernel/workqueue.c:3236 [inline] process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3319 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x439/0x7d0 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245