usb 6-1: USB disconnect, device number 55
BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 0 PID: 26508 Comm: kworker/0:9 Not tainted 5.8.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: usb_hub_wq hub_event
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x18f/0x20d lib/dump_stack.c:118
 add_chain_cache kernel/locking/lockdep.c:3063 [inline]
 lookup_chain_cache_add kernel/locking/lockdep.c:3162 [inline]
 validate_chain kernel/locking/lockdep.c:3183 [inline]
 __lock_acquire.cold+0x11/0x3f8 kernel/locking/lockdep.c:4380
 lock_acquire+0x1f1/0xad0 kernel/locking/lockdep.c:4959
 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
 _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151
 rq_lock kernel/sched/sched.h:1261 [inline]
 ttwu_queue kernel/sched/core.c:2410 [inline]
 try_to_wake_up+0x5c4/0x1360 kernel/sched/core.c:2663
 wake_up_process kernel/sched/core.c:2733 [inline]
 wake_up_q+0x96/0x100 kernel/sched/core.c:498
 __mutex_unlock_slowpath+0x2b6/0x610 kernel/locking/mutex.c:1280
 kernfs_remove_by_name_ns+0x82/0xb0 fs/kernfs/dir.c:1518
 sysfs_remove_file include/linux/sysfs.h:583 [inline]
 device_remove_file+0x25/0x30 drivers/base/core.c:2070
 usb_remove_sysfs_intf_files+0x5e/0x9a drivers/usb/core/sysfs.c:1277
 usb_bus_notify+0xf0/0x110 drivers/usb/core/usb.c:956
 notifier_call_chain+0xb5/0x200 kernel/notifier.c:83
 __blocking_notifier_call_chain kernel/notifier.c:284 [inline]
 __blocking_notifier_call_chain kernel/notifier.c:271 [inline]
 blocking_notifier_call_chain kernel/notifier.c:295 [inline]
 blocking_notifier_call_chain+0x67/0x90 kernel/notifier.c:292
 device_del+0x17e/0xd20 drivers/base/core.c:2831
 usb_disable_device+0x361/0x800 drivers/usb/core/message.c:1245
 usb_disconnect.cold+0x251/0x742 drivers/usb/core/hub.c:2217
 hub_port_connect drivers/usb/core/hub.c:5059 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5348 [inline]
 port_event drivers/usb/core/hub.c:5494 [inline]
 hub_event+0x1965/0x3e40 drivers/usb/core/hub.c:5576
 process_one_work+0x94c/0x1670 kernel/workqueue.c:2269
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415
 kthread+0x3b5/0x4a0 kernel/kthread.c:291
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293
usb 6-1: new high-speed USB device number 56 using dummy_hcd
usb 6-1: Using ep0 maxpacket: 8
usb 6-1: config 0 has an invalid descriptor of length 0, skipping remainder of the config
usb 6-1: New USB device found, idVendor=0bd3, idProduct=0555, bcdDevice=69.6a
usb 6-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
usb 6-1: config 0 descriptor??
uvcvideo: Found UVC 0.00 device <unnamed> (0bd3:0555)
uvcvideo: No valid video chain found.
usb 6-1: USB disconnect, device number 56