WARNING: ODEBUG bug in dentry

IPVS: set_ctl: invalid protocol: 59 224.0.0.2:20000 lc
------------[ cut here ]------------
IPVS: length: 103 != 24
ODEBUG: free active (active state 1) object type: rcu_head hint:           (null)
WARNING: CPU: 1 PID: 4352 at lib/debugobjects.c:291 debug_print_object+0x166/0x220 lib/debugobjects.c:288
IPVS: length: 103 != 24
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 4352 Comm: syz-executor2 Not tainted 4.16.0-rc6+ #286
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+0x194/0x24d lib/dump_stack.c:53
 panic+0x1e4/0x41c kernel/panic.c:183
 __warn+0x1dc/0x200 kernel/panic.c:547
 report_bug+0x1f4/0x2b0 lib/bug.c:186
 fixup_bug.part.11+0x37/0x80 arch/x86/kernel/traps.c:178
 fixup_bug arch/x86/kernel/traps.c:247 [inline]
 do_error_trap+0x2d7/0x3e0 arch/x86/kernel/traps.c:296
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:986
RIP: 0010:debug_print_object+0x166/0x220 lib/debugobjects.c:288
RSP: 0018:ffff8801b0f8f778 EFLAGS: 00010082
RAX: dffffc0000000008 RBX: 0000000000000003 RCX: ffffffff815b7f7e
RDX: 0000000000000000 RSI: 1ffff100361f1e9f RDI: 0000000000000000
RBP: ffff8801b0f8f7b8 R08: 0000000000000000 R09: 1ffff100361f1e75
R10: ffffed00361f1f1e R11: ffffffff87b3b438 R12: 0000000000000001
R13: ffffffff87b44760 R14: ffffffff86e59540 R15: 0000000000000000
 __debug_check_no_obj_freed lib/debugobjects.c:745 [inline]
 debug_check_no_obj_freed+0x662/0xf1f lib/debugobjects.c:774
 kmem_cache_free+0x24c/0x2a0 mm/slab.c:3742
 __d_free fs/dcache.c:266 [inline]
 dentry_free+0xcd/0x130 fs/dcache.c:342
 __dentry_kill+0x4fe/0x700 fs/dcache.c:589
 dentry_kill fs/dcache.c:616 [inline]
 dput.part.20+0x6fb/0x830 fs/dcache.c:831
 dput+0x1f/0x30 fs/dcache.c:795
 __fput+0x51c/0x7e0 fs/file_table.c:227
 ____fput+0x15/0x20 fs/file_table.c:243
 task_work_run+0x199/0x270 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:191 [inline]
 exit_to_usermode_loop+0x275/0x2f0 arch/x86/entry/common.c:166
 prepare_exit_to_usermode arch/x86/entry/common.c:196 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:265 [inline]
 do_syscall_64+0x6ec/0x940 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x40e9f0
RSP: 002b:0000000000a3e368 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000a3e390 RCX: 000000000040e9f0
RDX: 00000000000000e0 RSI: 0000000000a3e730 RDI: 0000000000000013
RBP: 0000000000702000 R08: 0000000000006000 R09: 0000000000004000
R10: 0000000000a3e490 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000013 R14: 0000000000000000 R15: 0000000000702000
Shutting down cpus with NMI
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..