------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(!test_bit(class_idx, lock_classes_in_use))
WARNING: CPU: 0 PID: 25487 at kernel/locking/lockdep.c:4411 __lock_acquire+0x100c/0x5780 kernel/locking/lockdep.c:4411
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 25487 Comm: kworker/0:16 Not tainted 5.9.0-rc6-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:77 [inline]
 dump_stack+0x198/0x1fd lib/dump_stack.c:118
 panic+0x382/0x7fb kernel/panic.c:231
 __warn.cold+0x20/0x4b kernel/panic.c:600
 report_bug+0x1bd/0x210 lib/bug.c:198
 handle_bug+0x38/0x90 arch/x86/kernel/traps.c:234
 exc_invalid_op+0x14/0x40 arch/x86/kernel/traps.c:254
 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:536
RIP: 0010:__lock_acquire+0x100c/0x5780 kernel/locking/lockdep.c:4411
Code: d2 0f 85 79 3e 00 00 44 8b 3d 38 ed fd 09 45 85 ff 0f 85 ae fd ff ff 48 c7 c6 c0 00 8c 88 48 c7 c7 80 d5 8b 88 e8 26 d1 ea ff <0f> 0b e9 97 fd ff ff bf 02 00 00 00 e9 f1 f5 ff ff 48 c7 c2 60 e1
RSP: 0018:ffffc9000f1c78e8 EFLAGS: 00010082
RAX: 0000000000000000 RBX: ffffffffe9b404ee RCX: 0000000000000000
RDX: ffff88804fb00440 RSI: ffffffff815f5985 RDI: fffff52001e38f0f
RBP: ffff88804fb00440 R08: 0000000000000000 R09: ffffffff8a05adc3
R10: 0000000000001213 R11: 0000000000000001 R12: ffff88804fb00dc8
R13: ffff88804fb00dea R14: 0000000000000000 R15: 0000000000000000
 lock_acquire+0x1f3/0xaf0 kernel/locking/lockdep.c:5029
 __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+0x3b/0x110 net/core/sock.c:3048
 l2cap_sock_teardown_cb+0x88/0x400 net/bluetooth/l2cap_sock.c:1520
 l2cap_chan_del+0xad/0x1300 net/bluetooth/l2cap_core.c:618
 l2cap_chan_close+0x118/0xb10 net/bluetooth/l2cap_core.c:823
 l2cap_chan_timeout+0x173/0x450 net/bluetooth/l2cap_core.c:436
 process_one_work+0x94c/0x1670 kernel/workqueue.c:2269
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415
 kthread+0x3b5/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
Kernel Offset: disabled
Rebooting in 86400 seconds..