syzbot

IPVS: ftp: loaded support on port[0] = 21
Bluetooth: hci0 command 0x0401 tx timeout
------------[ cut here ]------------
WARNING: CPU: 0 PID: 3 at kernel/workqueue.c:1386 __queue_work+0xaaa/0xf70 kernel/workqueue.c:1386
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 3 Comm: kworker/0:0 Not tainted 4.14.222-syzkaller #0
IPVS: set_ctl: invalid protocol: 46 172.20.20.11:20000
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events hci_cmd_timeout
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
IPVS: sync thread started: state = BACKUP, mcast_ifn = gre0, syncid = 0, id = 0
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:964
RIP: 0010:__queue_work+0xaaa/0xf70 kernel/workqueue.c:1386
RSP: 0018:ffff8880b5fe7cc0 EFLAGS: 00010097
RAX: ffff8880b5fdc0c0 RBX: ffff8880ba42e000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8880ba42e008
RBP: 0000000000000008 R08: ffffffff8c051008 R09: 0000000000000002
R10: 0000000000000000 R11: ffff8880b5fdc0c0 R12: ffff888055166880
R13: ffff888055166880 R14: 0000000000000000 R15: ffff88809d04eac0
 queue_work_on+0x159/0x1d0 kernel/workqueue.c:1490
 process_one_work+0x793/0x14a0 kernel/workqueue.c:2116
 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2250
 kthread+0x30d/0x420 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Kernel Offset: disabled
Rebooting in 86400 seconds..