overlayfs: fs on './file0' does not support file handles, falling back to index=off.
ODEBUG: assert_init not available (active state 0) object type: timer_list hint:           (null)
------------[ cut here ]------------
WARNING: CPU: 0 PID: 10807 at lib/debugobjects.c:287 debug_print_object.cold+0xa7/0xdb lib/debugobjects.c:287
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 10807 Comm: syz-executor.2 Not tainted 4.14.232-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x281 lib/dump_stack.c:58
 panic+0x1f9/0x42d kernel/panic.c:183
 __warn.cold+0x20/0x44 kernel/panic.c:547
 report_bug+0x208/0x250 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:177 [inline]
 fixup_bug arch/x86/kernel/traps.c:172 [inline]
 do_error_trap+0x195/0x2d0 arch/x86/kernel/traps.c:295
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:964
RIP: 0010:debug_print_object.cold+0xa7/0xdb lib/debugobjects.c:287
RSP: 0018:ffff888050377638 EFLAGS: 00010086
RAX: 0000000000000061 RBX: 0000000000000005 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff878bbbc0 RDI: ffffed100a06eebd
RBP: ffffffff878b6e80 R08: 0000000000000061 R09: 0000000000000005
R10: 0000000000000000 R11: ffff888050a32140 R12: 0000000000000000
R13: 0000000000000000 R14: ffff888051280db0 R15: 1ffff1100a06eed0
 debug_object_assert_init lib/debugobjects.c:656 [inline]
 debug_object_assert_init+0x1d3/0x2d0 lib/debugobjects.c:627
 debug_timer_assert_init kernel/time/timer.c:708 [inline]
 debug_assert_init kernel/time/timer.c:756 [inline]
 del_timer+0x5d/0xe0 kernel/time/timer.c:1151
 try_to_grab_pending+0x243/0x610 kernel/workqueue.c:1225
 __cancel_work+0x68/0x240 kernel/workqueue.c:3032
 l2cap_clear_timer include/net/bluetooth/l2cap.h:834 [inline]
 l2cap_chan_del+0x4b5/0x950 net/bluetooth/l2cap_core.c:641
 l2cap_conn_del+0x36e/0x690 net/bluetooth/l2cap_core.c:1729
 l2cap_disconn_cfm net/bluetooth/l2cap_core.c:7441 [inline]
 l2cap_disconn_cfm+0x7c/0xb0 net/bluetooth/l2cap_core.c:7434
 hci_disconn_cfm include/net/bluetooth/hci_core.h:1226 [inline]
 hci_conn_hash_flush+0x127/0x260 net/bluetooth/hci_conn.c:1393
 hci_dev_do_close+0x535/0xca0 net/bluetooth/hci_core.c:1622
 hci_unregister_dev+0x17f/0x8c0 net/bluetooth/hci_core.c:3193
 vhci_release+0x70/0xe0 drivers/bluetooth/hci_vhci.c:354
 __fput+0x25f/0x7a0 fs/file_table.c:210
 task_work_run+0x11f/0x190 kernel/task_work.c:113
 exit_task_work include/linux/task_work.h:22 [inline]
 do_exit+0xa44/0x2850 kernel/exit.c:868
 do_group_exit+0x100/0x2e0 kernel/exit.c:965
 get_signal+0x38d/0x1ca0 kernel/signal.c:2423
 do_signal+0x7c/0x1550 arch/x86/kernel/signal.c:792
 exit_to_usermode_loop+0x160/0x200 arch/x86/entry/common.c:160
 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
 do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x4665d9
RSP: 002b:00007ff7271ba218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 000000000056c0b8 RCX: 00000000004665d9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000056c0b8
RBP: 000000000056c0b0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c0bc
R13: 00007fff120bc7df R14: 00007ff7271ba300 R15: 0000000000022000
Kernel Offset: disabled
Rebooting in 86400 seconds..