INFO: trying to register non-static key.
the code is fine but needs lockdep annotation.
turning off the locking correctness validator.
CPU: 1 PID: 7364 Comm: kworker/1:5 Not tainted 5.12.0-rc2-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+0x10c/0x14b lib/dump_stack.c:120
 assign_lock_key kernel/locking/lockdep.c:935 [inline]
 register_lock_class+0x111e/0x11f0 kernel/locking/lockdep.c:1247
 __lock_acquire+0xfc/0x5050 kernel/locking/lockdep.c:4779
 lock_acquire kernel/locking/lockdep.c:5510 [inline]
 lock_acquire+0x212/0x850 kernel/locking/lockdep.c:5475
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline]
 _raw_spin_lock_bh+0x2f/0x40 kernel/locking/spinlock.c:175
 spin_lock_bh include/linux/spinlock.h:359 [inline]
 lock_sock_nested+0x39/0xf0 net/core/sock.c:3063
 l2cap_sock_teardown_cb+0x83/0x3a0 net/bluetooth/l2cap_sock.c:1520
 l2cap_chan_del+0x96/0x1010 net/bluetooth/l2cap_core.c:618
 l2cap_chan_close+0xe2/0x9d0 net/bluetooth/l2cap_core.c:823
 l2cap_chan_timeout+0x122/0x3a0 net/bluetooth/l2cap_core.c:436
 process_one_work+0x84c/0x13b0 kernel/workqueue.c:2275
 worker_thread+0x598/0xf80 kernel/workqueue.c:2421
 kthread+0x36f/0x450 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294