usb 4-1: USB disconnect, device number 75
net1080 4-1:0.166 usb0: unregister 'net1080' usb-dummy_hcd.3-1, NetChip TurboCONNECT
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timer_pending(&dev->watchdog_timer)
WARNING: net/sched/sch_generic.c:1496 at dev_shutdown+0x3e1/0x440 net/sched/sch_generic.c:1496, CPU#0: kworker/0:0/9
Modules linked in:
CPU: 0 UID: 0 PID: 9 Comm: kworker/0:0 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:dev_shutdown+0x3e1/0x440 net/sched/sch_generic.c:1496
Code: c5 cc 7f f8 49 83 7d 00 00 75 19 e8 19 53 16 f8 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d e9 06 11 12 02 cc e8 00 53 16 f8 90 <0f> 0b 90 eb e1 e8 f5 52 16 f8 4c 89 e7 be 03 00 00 00 e8 58 c0 0a
RSP: 0018:ffffc900000e71e0 EFLAGS: 00010293
RAX: ffffffff89b0a020 RBX: ffff88802a7a44e8 RCX: ffff88801dae5b80
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffffc900000e7007 R09: 1ffff9200001ce00
R10: dffffc0000000000 R11: fffff5200001ce01 R12: ffffffff90041010
R13: ffff88802a7a45c8 R14: 1ffff110054f489d R15: ffffffff90041000
FS:  0000000000000000(0000) GS:ffff888124de1000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffdfcf33e8c CR3: 000000006524a000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 unregister_netdevice_many_notify+0x11a9/0x2380 net/core/dev.c:12439
 unregister_netdevice_many net/core/dev.c:12514 [inline]
 unregister_netdevice_queue net/core/dev.c:12328 [inline]
 unregister_netdevice include/linux/netdevice.h:3415 [inline]
 unregister_netdev+0x15f/0x200 net/core/dev.c:12532
 usbnet_disconnect+0xcd/0x390 drivers/net/usb/usbnet.c:1685
 usb_unbind_interface+0x26e/0x910 drivers/usb/core/driver.c:458
 device_remove drivers/base/dd.c:633 [inline]
 __device_release_driver drivers/base/dd.c:1344 [inline]
 device_release_driver_internal+0x4d9/0x870 drivers/base/dd.c:1367
 bus_remove_device+0x455/0x570 drivers/base/bus.c:657
 device_del+0x527/0x8f0 drivers/base/core.c:3881
 usb_disable_device+0x3d4/0x8d0 drivers/usb/core/message.c:1476
 usb_disconnect+0x32f/0x990 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+0x1cc9/0x4f30 drivers/usb/core/hub.c:5953
 process_one_work+0x9ab/0x1780 kernel/workqueue.c:3288
 process_scheduled_works kernel/workqueue.c:3379 [inline]
 worker_thread+0xba8/0x11e0 kernel/workqueue.c:3465
 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>