------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(1)
WARNING: CPU: 1 PID: 12837 at kernel/locking/lockdep.c:183 hlock_class kernel/locking/lockdep.c:183 [inline]
WARNING: CPU: 1 PID: 12837 at kernel/locking/lockdep.c:183 hlock_class kernel/locking/lockdep.c:172 [inline]
WARNING: CPU: 1 PID: 12837 at kernel/locking/lockdep.c:183 check_wait_context kernel/locking/lockdep.c:4054 [inline]
WARNING: CPU: 1 PID: 12837 at kernel/locking/lockdep.c:183 __lock_acquire+0x1629/0x56e0 kernel/locking/lockdep.c:4330
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 12837 Comm: kworker/1:12 Not tainted 5.8.0-rc7-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+0x18f/0x20d lib/dump_stack.c:118
 panic+0x2e3/0x75c kernel/panic.c:231
 __warn.cold+0x20/0x45 kernel/panic.c:600
 report_bug+0x1bd/0x210 lib/bug.c:198
 handle_bug+0x38/0x90 arch/x86/kernel/traps.c:235
 exc_invalid_op+0x13/0x40 arch/x86/kernel/traps.c:255
 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:540
RIP: 0010:hlock_class kernel/locking/lockdep.c:183 [inline]
RIP: 0010:hlock_class kernel/locking/lockdep.c:172 [inline]
RIP: 0010:check_wait_context kernel/locking/lockdep.c:4054 [inline]
RIP: 0010:__lock_acquire+0x1629/0x56e0 kernel/locking/lockdep.c:4330
Code: 08 84 d2 0f 85 bd 35 00 00 8b 35 62 69 57 09 85 f6 0f 85 cc fa ff ff 48 c7 c6 e0 ae 4b 88 48 c7 c7 e0 a9 4b 88 e8 e9 51 eb ff <0f> 0b e9 b2 fa ff ff e8 3b 4f 94 06 85 c0 0f 84 ed fa ff ff 48 c7
RSP: 0018:ffffc900016d78e0 EFLAGS: 00010086
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000
RDX: ffff88809b5621c0 RSI: ffffffff815d3ff7 RDI: fffff520002daf0e
RBP: ffff88809b562b30 R08: 0000000000000000 R09: ffffffff89bc9903
R10: 0000000000000c16 R11: 0000000000000001 R12: ffff88809b5621c0
R13: 0000000000001c10 R14: ffff88808e6700a0 R15: 0000000000040000
 lock_acquire+0x1f1/0xad0 kernel/locking/lockdep.c:4959
 __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:358 [inline]
 lock_sock_nested+0x3b/0x110 net/core/sock.c:3019
 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:291
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293
Kernel Offset: disabled
Rebooting in 86400 seconds..