------------[ cut here ]------------ DEBUG_LOCKS_WARN_ON(1) WARNING: CPU: 0 PID: 2960 at kernel/locking/lockdep.c:203 hlock_class kernel/locking/lockdep.c:203 [inline] WARNING: CPU: 0 PID: 2960 at kernel/locking/lockdep.c:203 hlock_class kernel/locking/lockdep.c:192 [inline] WARNING: CPU: 0 PID: 2960 at kernel/locking/lockdep.c:203 check_wait_context kernel/locking/lockdep.c:4688 [inline] WARNING: CPU: 0 PID: 2960 at kernel/locking/lockdep.c:203 __lock_acquire+0x1344/0x54a0 kernel/locking/lockdep.c:4965 Modules linked in: CPU: 0 PID: 2960 Comm: kworker/0:2 Not tainted 5.14.0-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: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 e5 11 0c 85 c0 0f 85 f4 fd ff ff 48 c7 c6 e0 e6 8b 89 48 c7 c7 a0 da 8b 89 e8 05 1a 91 07 <0f> 0b 31 ed e9 b7 f0 ff ff e8 0e 19 79 02 85 c0 0f 84 12 fe ff ff RSP: 0018:ffffc90001f87910 EFLAGS: 00010086 RAX: 0000000000000000 RBX: ffff88806e1130a0 RCX: 0000000000000000 RDX: ffff88801e413880 RSI: ffffffff815d87b5 RDI: fffff520003f0f14 RBP: 0000000000001d7d R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff815d25ee R11: 0000000000000000 R12: ffff88801e414310 R13: ffff88801e413880 R14: 0000000000040000 R15: 0000000000041d7d FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000970004 CR3: 000000002a81f000 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:359 [inline] lock_sock_nested+0x40/0x120 net/core/sock.c:3184 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