------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(1)
WARNING: CPU: 1 PID: 8530 at kernel/locking/lockdep.c:168 hlock_class kernel/locking/lockdep.c:168 [inline]
WARNING: CPU: 1 PID: 8530 at kernel/locking/lockdep.c:168 hlock_class kernel/locking/lockdep.c:157 [inline]
WARNING: CPU: 1 PID: 8530 at kernel/locking/lockdep.c:168 mark_lock+0x225/0x1220 kernel/locking/lockdep.c:3878
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 8530 Comm: syz-executor.4 Not tainted 5.6.0-rc3-next-20200228-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x188/0x20d lib/dump_stack.c:118
 panic+0x2e3/0x75c kernel/panic.c:221
 __warn.cold+0x2f/0x35 kernel/panic.c:582
 report_bug+0x27b/0x2f0 lib/bug.c:195
 fixup_bug arch/x86/kernel/traps.c:175 [inline]
 fixup_bug arch/x86/kernel/traps.c:170 [inline]
 do_error_trap+0x12b/0x220 arch/x86/kernel/traps.c:267
 do_invalid_op+0x32/0x40 arch/x86/kernel/traps.c:286
 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027
RIP: 0010:hlock_class kernel/locking/lockdep.c:168 [inline]
RIP: 0010:hlock_class kernel/locking/lockdep.c:157 [inline]
RIP: 0010:mark_lock+0x225/0x1220 kernel/locking/lockdep.c:3878
Code: d0 7c 08 84 d2 0f 85 ab 0e 00 00 44 8b 1d e3 d4 2d 09 45 85 db 75 b6 48 c7 c6 c0 7d 2b 88 48 c7 c7 00 7e 2b 88 e8 73 d7 eb ff <0f> 0b 31 db e9 aa fe ff ff 48 c7 c7 40 1f 60 8c e8 76 2c 57 00 e9
RSP: 0018:ffffc900018a7968 EFLAGS: 00010086
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff815c4e91 RDI: fffff52000314f1f
RBP: ffff88808f256340 R08: ffff88808f256340 R09: fffffbfff13345a5
R10: fffffbfff13345a4 R11: ffffffff899a2d23 R12: 0000000000000002
R13: ffff88808f256c2a R14: ffff88808f256c08 R15: 0000000000040a52
 mark_usage kernel/locking/lockdep.c:3814 [inline]
 __lock_acquire+0x15c2/0x5270 kernel/locking/lockdep.c:4144
 lock_acquire+0x197/0x420 kernel/locking/lockdep.c:4720
 flush_workqueue+0x126/0x14c0 kernel/workqueue.c:2777
 hci_dev_open+0xd9/0x260 net/bluetooth/hci_core.c:1626
 hci_sock_bind+0x427/0x1100 net/bluetooth/hci_sock.c:1200
 __sys_bind+0x20e/0x250 net/socket.c:1662
 __do_sys_bind net/socket.c:1673 [inline]
 __se_sys_bind net/socket.c:1671 [inline]
 __x64_sys_bind+0x6f/0xb0 net/socket.c:1671
 do_syscall_64+0xf6/0x790 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45c849
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ff94a86bc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000031
RAX: ffffffffffffffda RBX: 00007ff94a86c6d4 RCX: 000000000045c849
RDX: 0000000000000006 RSI: 0000000020000080 RDI: 0000000000000006
RBP: 000000000076bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 000000000000002c R14: 00000000004c2ce6 R15: 000000000076bfac
Kernel Offset: disabled
Rebooting in 86400 seconds..