IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready
IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
------------[ cut here ]------------
WARNING: CPU: 0 PID: 7037 at net/xfrm/xfrm_state.c:2175 xfrm_state_fini+0x2a0/0x340 net/xfrm/xfrm_state.c:2175
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 7037 Comm: kworker/u4:13 Not tainted 4.9.101-gaef17a5 #29
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
 ffff8801be8e7950 ffffffff81eb1009 ffffffff83c484a0 00000000ffffffff
 0000000000000000 0000000000000000 000000000000087f ffff8801be8e7a10
 ffffffff8141f925 0000000041b58ab3 ffffffff843b87e8 ffffffff8141f766
Call Trace:
 [<ffffffff81eb1009>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81eb1009>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8141f925>] panic+0x1bf/0x3bc kernel/panic.c:179
 [<ffffffff8141fbf6>] ?