usb 2-1: USB disconnect, device number 72
------------[ cut here ]------------
!work->func
WARNING: kernel/workqueue.c:4335 at __flush_work+0xa5d/0xcb0 kernel/workqueue.c:4335, CPU#0: kworker/0:2/813
Modules linked in:
CPU: 0 UID: 0 PID: 813 Comm: kworker/0:2 Not tainted syzkaller #0 PREEMPT(lazy) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Workqueue: usb_hub_wq hub_event
RIP: 0010:__flush_work+0xa5d/0xcb0 kernel/workqueue.c:4335
Code: 35 00 00 00 00 e8 e3 2e 12 00 e8 3e 90 1b 00 c6 44 24 0f 00 e9 91 fd ff ff e8 5f 04 36 00 90 0f 0b 90 eb eb e8 54 04 36 00 90 <0f> 0b 90 eb e0 e8 49 04 36 00 e8 44 04 36 00 48 8b 3c 24 e8 7b 38
RSP: 0018:ffffc9000271f228 EFLAGS: 00010283
RAX: 0000000000007004 RBX: dffffc0000000000 RCX: ffffc9001158f000
RDX: 0000000000100000 RSI: ffffffff817df46c RDI: ffff88810a3dbc00
RBP: ffff8881321614d8 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 000000000000594b R12: 0000000000000000
R13: ffff8881321614f0 R14: 0000000000000001 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff888268642000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6049f02e9c CR3: 00000001366c4000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 __cancel_work_sync kernel/workqueue.c:4494 [inline]
 cancel_work_sync+0xd1/0xf0 kernel/workqueue.c:4531
 asus_remove+0x182/0x1f0 drivers/hid/hid-asus.c:1360
 hid_device_remove+0xd1/0x270 drivers/hid/hid-core.c:2878
 device_remove+0xcb/0x180 drivers/base/dd.c:616
 __device_release_driver drivers/base/dd.c:1349 [inline]
 device_release_driver_internal+0x44e/0x620 drivers/base/dd.c:1372
 bus_remove_device+0x2bc/0x560 drivers/base/bus.c:664
 device_del+0x376/0x9b0 drivers/base/core.c:3961
 hid_remove_device drivers/hid/hid-core.c:3064 [inline]
 hid_destroy_device+0x19c/0x240 drivers/hid/hid-core.c:3086
 usbhid_disconnect+0xa0/0xe0 drivers/hid/usbhid/hid-core.c:1479
 usb_unbind_interface+0x1dd/0x9e0 drivers/usb/core/driver.c:458
 device_remove drivers/base/dd.c:618 [inline]
 device_remove+0x12a/0x180 drivers/base/dd.c:610
 __device_release_driver drivers/base/dd.c:1349 [inline]
 device_release_driver_internal+0x44e/0x620 drivers/base/dd.c:1372
 bus_remove_device+0x2bc/0x560 drivers/base/bus.c:664
 device_del+0x376/0x9b0 drivers/base/core.c:3961
 usb_disable_device+0x367/0x810 drivers/usb/core/message.c:1478
 usb_disconnect+0x2e2/0x9a0 drivers/usb/core/hub.c:2345
 hub_port_connect drivers/usb/core/hub.c:5407 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5707 [inline]
 port_event drivers/usb/core/hub.c:5871 [inline]
 hub_event+0x1d0c/0x4af0 drivers/usb/core/hub.c:5953
 process_one_work+0xa23/0x1940 kernel/workqueue.c:3322
 process_scheduled_works kernel/workqueue.c:3405 [inline]
 worker_thread+0x5ef/0xe50 kernel/workqueue.c:3486
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x69a/0xc80 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>