------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(1)
WARNING: CPU: 0 PID: 1473 at kernel/locking/lockdep.c:203 hlock_class kernel/locking/lockdep.c:203 [inline]
WARNING: CPU: 0 PID: 1473 at kernel/locking/lockdep.c:203 hlock_class kernel/locking/lockdep.c:192 [inline]
WARNING: CPU: 0 PID: 1473 at kernel/locking/lockdep.c:203 check_wait_context kernel/locking/lockdep.c:4575 [inline]
WARNING: CPU: 0 PID: 1473 at kernel/locking/lockdep.c:203 __lock_acquire+0x1650/0x5230 kernel/locking/lockdep.c:4852
Modules linked in:
CPU: 0 PID: 1473 Comm: kworker/0:3 Not tainted 5.13.0-rc6-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:4575 [inline]
RIP: 0010:__lock_acquire+0x1650/0x5230 kernel/locking/lockdep.c:4852
Code: 08 84 d2 0f 85 4a 2c 00 00 8b 05 73 75 6f 0c 85 c0 0f 85 d4 f9 ff ff 48 c7 c6 40 bf 6b 89 48 c7 c7 c0 b3 6b 89 e8 bb 78 7b 07 <0f> 0b e9 ba f9 ff ff c7 44 24 40 fe ff ff ff 41 bf 01 00 00 00 c7
RSP: 0000:ffffc9000361f908 EFLAGS: 00010086
RAX: 0000000000000000 RBX: ffff88801db34278 RCX: 0000000000000000
RDX: ffff88801db33880 RSI: ffffffff815ce2a5 RDI: fffff520006c3f13
RBP: ffff88801db34318 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff815c810e R11: 0000000000000000 R12: ffff88801db33880
R13: 00000000000010ad R14: ffff888022d860a0 R15: 0000000000040000
FS:  0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000528430 CR3: 000000000bc8e000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 lock_acquire kernel/locking/lockdep.c:5512 [inline]
 lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5477
 __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:3065
 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+0x1bc/0xaf0 net/bluetooth/l2cap_core.c:825
 l2cap_chan_timeout+0x17e/0x2f0 net/bluetooth/l2cap_core.c:436
 process_one_work+0x98d/0x1600 kernel/workqueue.c:2276
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2422
 kthread+0x3b1/0x4a0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294