INFO: trying to register non-static key.
The code is fine but needs lockdep annotation, or maybe
you didn't initialize this object before use?
turning off the locking correctness validator.
CPU: 1 PID: 9652 Comm: kworker/1:5 Not tainted 5.12.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events l2cap_chan_timeout
Call Trace:
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x202/0x31e lib/dump_stack.c:120
 register_lock_class+0xedb/0x1490 kernel/locking/lockdep.c:936
 __lock_acquire+0x186/0x6040 kernel/locking/lockdep.c:4781
 lock_acquire+0x17f/0x720 kernel/locking/lockdep.c:5512
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0xb3/0x100 kernel/locking/spinlock.c:159
 skb_dequeue net/core/skbuff.c:3095 [inline]
 skb_queue_purge+0x2e/0x1c0 net/core/skbuff.c:3133
 l2cap_chan_timeout+0x12c/0x280 net/bluetooth/l2cap_core.c:436
 process_one_work+0x833/0x10c0 kernel/workqueue.c:2275
 worker_thread+0xac1/0x1300 kernel/workqueue.c:2421
 kthread+0x39a/0x3c0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
usb 6-1: new high-speed USB device number 8 using dummy_hcd
usb 6-1: New USB device found, idVendor=9710, idProduct=7832, bcdDevice=fe.41
usb 6-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
usb 6-1: config 0 descriptor??
usb 6-1: Cannot read MAC address
MOSCHIP usb-ethernet driver: probe of 6-1:0.0 failed with error -71
usb 6-1: USB disconnect, device number 8
usb 6-1: new high-speed USB device number 9 using dummy_hcd
usb 6-1: New USB device found, idVendor=9710, idProduct=7832, bcdDevice=fe.41
usb 6-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
usb 6-1: config 0 descriptor??
usb 6-1: Cannot set MAC address
MOSCHIP usb-ethernet driver: probe of 6-1:0.0 failed with error -71
usb 6-1: USB disconnect, device number 9
usb 6-1: new high-speed USB device number 11 using dummy_hcd
usb 6-1: New USB device found, idVendor=9710, idProduct=7832, bcdDevice=fe.41
usb 6-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
usb 6-1: config 0 descriptor??
usb 6-1: Cannot set MAC address
MOSCHIP usb-ethernet driver: probe of 6-1:0.0 failed with error -71
usb 6-1: USB disconnect, device number 11
usb 4-1: new high-speed USB device number 14 using dummy_hcd
usb 4-1: config 0 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7
usb 4-1: config 0 interface 0 altsetting 0 endpoint 0x81 has invalid wMaxPacketSize 0
usb 4-1: New USB device found, idVendor=5543, idProduct=3031, bcdDevice= 0.40
usb 4-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
usb 4-1: config 0 descriptor??
usb 4-1: language id specifier not provided by device, defaulting to English
input: HID 5543:3031 Pen as /devices/platform/dummy_hcd.3/usb4/4-1/4-1:0.0/0003:5543:3031.000C/input/input37
uclogic 0003:5543:3031.000C: input,hidraw0: USB HID v0.00 Device [HID 5543:3031] on usb-dummy_hcd.3-1/input0
usb 4-1: USB disconnect, device number 14