------------[ cut here ]------------
WARNING: CPU: 0 PID: 21266 at net/xfrm/xfrm_policy.c:3014 xfrm_policy_fini+0x1f4/0x260 net/xfrm/xfrm_policy.c:3014
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 21266 Comm: kworker/u4:26 Not tainted 4.14.113+ #61
Workqueue: netns cleanup_net
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0xb9/0x10e lib/dump_stack.c:53
 panic+0x1d9/0x3c2 kernel/panic.c:182
 __warn.cold+0x2f/0x3b kernel/panic.c:546
Kernel Offset: 0x5600000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
Rebooting in 86400 seconds..