BUG: MAX_STACK_TRACE_ENTRIES too low!
turning off the locking correctness validator.
CPU: 0 PID: 14515 Comm: syz-executor824 Not tainted 5.0.0+ #20
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+0x172/0x1f0 lib/dump_stack.c:113
 save_trace kernel/locking/lockdep.c:467 [inline]
 save_trace.cold+0x14/0x19 kernel/locking/lockdep.c:437
 mark_lock+0x2fb/0x1380 kernel/locking/lockdep.c:3410
 mark_irqflags kernel/locking/lockdep.c:3317 [inline]
 __lock_acquire+0x1317/0x3fb0 kernel/locking/lockdep.c:3653
 lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:4211
 flush_workqueue+0x126/0x14c0 kernel/workqueue.c:2774
 drain_workqueue+0x1b4/0x470 kernel/workqueue.c:2939
 destroy_workqueue+0x21/0x700 kernel/workqueue.c:4319
 hci_unregister_dev+0x3b3/0x820 net/bluetooth/hci_core.c:3408
 vhci_release+0x76/0xf0 drivers/bluetooth/hci_vhci.c:354
 __fput+0x2e5/0x8d0 fs/file_table.c:278
 ____fput+0x16/0x20 fs/file_table.c:309
 task_work_run+0x14a/0x1c0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop+0x273/0x2c0 arch/x86/entry/common.c:166
 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
 do_syscall_64+0x52d/0x610 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x400f30
Code: 01 f0 ff ff 0f 83 20 0c 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 83 3d 9d 17 2d 00 00 75 14 b8 03 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 f4 0b 00 00 c3 48 83 ec 08 e8 5a 01 00 00
RSP: 002b:00007ffc57884588 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000400f30
RDX: 0000000000000002 RSI: 00000000200000c0 RDI: 0000000000000003
RBP: 000000000002f9c1 R08: 00000000004002c8 R09: 00000000004002c8
R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000401fb0
R13: 0000000000402040 R14: 0000000000000000 R15: 0000000000000000
kobject: 'hci0' (00000000b1d8b6fa): kobject_cleanup, parent           (null)
kobject: 'hci0' (00000000b1d8b6fa): calling ktype release
kobject: 'hci0': free name