------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(1)
WARNING: CPU: 0 PID: 7 at kernel/locking/lockdep.c:203 hlock_class kernel/locking/lockdep.c:203 [inline]
WARNING: CPU: 0 PID: 7 at kernel/locking/lockdep.c:203 hlock_class kernel/locking/lockdep.c:192 [inline]
WARNING: CPU: 0 PID: 7 at kernel/locking/lockdep.c:203 check_wait_context kernel/locking/lockdep.c:4688 [inline]
WARNING: CPU: 0 PID: 7 at kernel/locking/lockdep.c:203 __lock_acquire+0x1344/0x54a0 kernel/locking/lockdep.c:4965
Modules linked in:
CPU: 0 PID: 7 Comm: kworker/0:1 Not tainted 5.14.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events l2cap_chan_timeout
RIP: 0010:hlock_class kernel/locking/lockdep.c:203 [inline]
RIP: 0010:hlock_class kernel/locking/lockdep.c:192 [inline]
RIP: 0010:check_wait_context kernel/locking/lockdep.c:4688 [inline]
RIP: 0010:__lock_acquire+0x1344/0x54a0 kernel/locking/lockdep.c:4965
Code: 08 84 d2 0f 85 f1 3d 00 00 8b 05 6f 7a 12 0c 85 c0 0f 85 f4 fd ff ff 48 c7 c6 e0 cf 8b 89 48 c7 c7 a0 c3 8b 89 e8 70 53 8e 07 <0f> 0b 31 ed e9 b7 f0 ff ff e8 fe 78 79 02 85 c0 0f 84 12 fe ff ff
RSP: 0018:ffffc90000edf910 EFLAGS: 00010086
RAX: 0000000000000000 RBX: ffff8880163610a0 RCX: 0000000000000000
RDX: ffff888011e2a1c0 RSI: ffffffff815cb9a5 RDI: fffff520001dbf14
RBP: 0000000000001b33 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff815c57ae R11: 0000000000000000 R12: ffff888011e2ac50
R13: ffff888011e2a1c0 R14: 0000000000040000 R15: 0000000000041b33
FS:  0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc78babd37 CR3: 0000000022015000 CR4: 00000000001506f0
Call Trace:
 lock_acquire kernel/locking/lockdep.c:5625 [inline]
 lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5590
 __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+0x40/0x120 net/core/sock.c:3162
 l2cap_sock_teardown_cb+0xa1/0x660 net/bluetooth/l2cap_sock.c:1528
 l2cap_chan_del+0xbc/0xa80 net/bluetooth/l2cap_core.c:622
 l2cap_chan_close+0x1b9/0xaf0 net/bluetooth/l2cap_core.c:825
 l2cap_chan_timeout+0x17e/0x2f0 net/bluetooth/l2cap_core.c:436
 process_one_work+0x98d/0x1630 kernel/workqueue.c:2276
 worker_thread+0x658/0x11f0 kernel/workqueue.c:2422
 kthread+0x3e5/0x4d0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
----------------
Code disassembly (best guess):
   0:	08 84 d2 0f 85 f1 3d 	or     %al,0x3df1850f(%rdx,%rdx,8)
   7:	00 00                	add    %al,(%rax)
   9:	8b 05 6f 7a 12 0c    	mov    0xc127a6f(%rip),%eax        # 0xc127a7e
   f:	85 c0                	test   %eax,%eax
  11:	0f 85 f4 fd ff ff    	jne    0xfffffe0b
  17:	48 c7 c6 e0 cf 8b 89 	mov    $0xffffffff898bcfe0,%rsi
  1e:	48 c7 c7 a0 c3 8b 89 	mov    $0xffffffff898bc3a0,%rdi
  25:	e8 70 53 8e 07       	callq  0x78e539a
  2a:	0f 0b                	ud2     <-- trapping instruction
  2c:	31 ed                	xor    %ebp,%ebp
  2e:	e9 b7 f0 ff ff       	jmpq   0xfffff0ea
  33:	e8 fe 78 79 02       	callq  0x2797936
  38:	85 c0                	test   %eax,%eax
  3a:	0f 84 12 fe ff ff    	je     0xfffffe52