------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(1)
WARNING: CPU: 1 PID: 8301 at kernel/locking/lockdep.c:203 hlock_class kernel/locking/lockdep.c:203 [inline]
WARNING: CPU: 1 PID: 8301 at kernel/locking/lockdep.c:203 hlock_class kernel/locking/lockdep.c:192 [inline]
WARNING: CPU: 1 PID: 8301 at kernel/locking/lockdep.c:203 check_wait_context kernel/locking/lockdep.c:4575 [inline]
WARNING: CPU: 1 PID: 8301 at kernel/locking/lockdep.c:203 __lock_acquire+0x1650/0x5230 kernel/locking/lockdep.c:4852
Modules linked in:
CPU: 1 PID: 8301 Comm: syz-executor.2 Not tainted 5.13.0-rc2-next-20210518-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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 d3 e4 8e 0c 85 c0 0f 85 d4 f9 ff ff 48 c7 c6 a0 c2 8b 89 48 c7 c7 20 b7 8b 89 e8 fb ac 80 07 <0f> 0b e9 ba f9 ff ff c7 44 24 40 fe ff ff ff 41 bf 01 00 00 00 c7
RSP: 0018:ffffc90002c0f538 EFLAGS: 00010086
RAX: 0000000000000000 RBX: ffff88806683c328 RCX: 0000000000000000
RDX: ffff88806683b900 RSI: ffffffff815dbea5 RDI: fffff52000581e99
RBP: ffff88806683c3f0 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff815d5cee R11: 0000000000000000 R12: ffff88806683b900
R13: 000000000000155d R14: ffff88802bc040a0 R15: 0000000000040000
FS:  0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000018af848 CR3: 000000002eb1f000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
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:364 [inline]
 lock_sock_nested+0x40/0x120 net/core/sock.c:3057
 l2cap_sock_teardown_cb+0xa1/0x660 net/bluetooth/l2cap_sock.c:1528
 l2cap_chan_del+0xbc/0xa80 net/bluetooth/l2cap_core.c:622
 l2cap_conn_del+0x3c0/0x7b0 net/bluetooth/l2cap_core.c:1898
 l2cap_disconn_cfm net/bluetooth/l2cap_core.c:8177 [inline]
 l2cap_disconn_cfm+0x95/0xd0 net/bluetooth/l2cap_core.c:8170
 hci_disconn_cfm include/net/bluetooth/hci_core.h:1500 [inline]
 hci_conn_hash_flush+0x127/0x260 net/bluetooth/hci_conn.c:1608
 hci_dev_do_close+0x528/0x1120 net/bluetooth/hci_core.c:1773
 hci_unregister_dev+0x263/0x1130 net/bluetooth/hci_core.c:4014
 vhci_release+0x70/0xe0 drivers/bluetooth/hci_vhci.c:340
 __fput+0x288/0x920 fs/file_table.c:280
 task_work_run+0xdd/0x1a0 kernel/task_work.c:164
 exit_task_work include/linux/task_work.h:32 [inline]
 do_exit+0xbfc/0x2a70 kernel/exit.c:826
 do_group_exit+0x125/0x310 kernel/exit.c:923
 get_signal+0x47f/0x2150 kernel/signal.c:2856
 arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:789
 handle_signal_work kernel/entry/common.c:147 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
 exit_to_user_mode_prepare+0x16e/0x280 kernel/entry/common.c:208
 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
 syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:301
 do_syscall_64+0x3e/0xb0 arch/x86/entry/common.c:57
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665d9
Code: Unable to access opcode bytes at RIP 0x4665af.
RSP: 002b:00007f11bcc68218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 000000000056bf88 RCX: 00000000004665d9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000056bf88
RBP: 000000000056bf80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf8c
R13: 00007ffd6cbf10cf R14: 00007f11bcc68300 R15: 0000000000022000