------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(1)
WARNING: CPU: 0 PID: 2957 at kernel/locking/lockdep.c:203 hlock_class kernel/locking/lockdep.c:203 [inline]
WARNING: CPU: 0 PID: 2957 at kernel/locking/lockdep.c:203 hlock_class kernel/locking/lockdep.c:192 [inline]
WARNING: CPU: 0 PID: 2957 at kernel/locking/lockdep.c:203 check_wait_context kernel/locking/lockdep.c:4688 [inline]
WARNING: CPU: 0 PID: 2957 at kernel/locking/lockdep.c:203 __lock_acquire+0x1344/0x54a0 kernel/locking/lockdep.c:4965
Modules linked in:
CPU: 0 PID: 2957 Comm: kworker/0:2 Not tainted 5.13.0-next-20210706-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 8f d3 11 0c 85 c0 0f 85 f4 fd ff ff 48 c7 c6 a0 e9 8b 89 48 c7 c7 60 dd 8b 89 e8 f3 4a 8c 07 <0f> 0b 31 ed e9 b7 f0 ff ff e8 9e 36 78 02 85 c0 0f 84 12 fe ff ff
RSP: 0018:ffffc90002747910 EFLAGS: 00010086
RAX: 0000000000000000 RBX: ffff888165f850a0 RCX: 0000000000000000
RDX: ffff88801f249c80 RSI: ffffffff815d7735 RDI: fffff520004e8f14
RBP: 000000000000112f R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff815d156e R11: 0000000000000000 R12: ffff88801f24a718
R13: ffff88801f249c80 R14: 0000000000040000 R15: 000000000004112f
FS:  0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d821000 CR3: 0000000158927000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
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:364 [inline]
 lock_sock_nested+0x40/0x120 net/core/sock.c:3160
 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