usb 5-1: new high-speed USB device number 2 using dummy_hcd
usb 5-1: config 0 interface 0 altsetting 0 endpoint 0x7 has invalid wMaxPacketSize 0
usb 5-1: config 0 interface 0 altsetting 0 bulk endpoint 0x7 has invalid maxpacket 0
usb 5-1: config 0 interface 0 altsetting 0 bulk endpoint 0x89 has invalid maxpacket 202
usb 5-1: New USB device found, idVendor=2040, idProduct=2000, bcdDevice=65.72
usb 5-1: New USB device strings: Mfr=151, Product=0, SerialNumber=0
usb 5-1: Manufacturer: syz
usb 5-1: config 0 descriptor??
smsusb:smsusb_probe: board id=9, interface number 0
smsusb:siano_media_device_register: media controller created
smsmdtv:smscore_sendrequest_and_wait: sendrequest returned error -22
smsmdtv:smscore_set_device_mode: mode detect failed -22
smsmdtv:smscore_start_device: set device mode failed , rc -22
smsusb:smsusb_init_device: smscore_start_device(...) failed
------------[ cut here ]------------
workqueue: work disable count underflowed
WARNING: CPU: 0 PID: 10 at kernel/workqueue.c:4355 work_offqd_enable kernel/workqueue.c:4355 [inline]
WARNING: CPU: 0 PID: 10 at kernel/workqueue.c:4355 enable_work+0x2b1/0x2c0 kernel/workqueue.c:4526
Modules linked in:
CPU: 0 UID: 0 PID: 10 Comm: kworker/0:1 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: usb_hub_wq hub_event
RIP: 0010:work_offqd_enable kernel/workqueue.c:4355 [inline]
RIP: 0010:enable_work+0x2b1/0x2c0 kernel/workqueue.c:4526
Code: 41 5e 41 5f 5d c3 cc cc cc cc cc e8 e9 2d be 09 e8 64 c0 35 00 c6 05 04 c6 dc 0d 01 90 48 c7 c7 c0 ef 69 8b e8 a0 cc 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:ffffc900001c6a60 EFLAGS: 00010046
RAX: beacb79721956b00 RBX: ffff888035e583b8 RCX: ffff88801ab18000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002
RBP: ffffc900001c6b10 R08: ffff88801fe24293 R09: 1ffff11003fc4852
R10: dffffc0000000000 R11: ffffed1003fc4853 R12: 1ffff92000038d50
R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000800001
FS:  0000000000000000(0000) GS:ffff88808d730000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055851fa5fec8 CR3: 000000001154d000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 __cancel_work_sync+0xf7/0x110 kernel/workqueue.c:4396
 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:3263 [inline]
 process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3346
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>