IPVS: Creating netns size=2536 id=8
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1343 at net/xfrm/xfrm_state.c:2167 xfrm_state_fini+0x2a0/0x340 net/xfrm/xfrm_state.c:2167
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 1343 Comm: kworker/u4:3 Not tainted 4.9.70-g9542d2a #5
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
 ffff8801d1587938 ffffffff81d90a29 ffffffff83a46d00 ffff8801d1587a10
 ffffffff83f40600 ffffffff833d4a60 0000000000000009 ffff8801d1587a00
 ffffffff8142c451 0000000041b58ab3 ffffffff84186f20 ffffffff8142c295
Call Trace:
 [<ffffffff81d90a29>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d90a29>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8142c451>] panic+0x1bc/0x3a8 kernel/panic.c:179
 [<ffffffff8112f3d4>] __warn+0x1c4/0x1e0 kernel/panic.c:542
 [<ffffffff8112f63c>] warn_slowpath_null+0x2c/0x40 kernel/panic.c:585
 [<ffffffff833d4a60>] xfrm_state_fini+0x2a0/0x340 net/xfrm/xfrm_state.c:2167
 [<ffffffff833b3acd>] xfrm_net_exit+0x2d/0x30 net/xfrm/xfrm_policy.c:3059
 [<ffffffff82f1289e>] ops_exit_list.isra.4+0xae/0x150 net/core/net_namespace.c:136
 [<ffffffff82f156bd>] cleanup_net+0x31d/0x610 net/core/net_namespace.c:454
 [<ffffffff8118780f>] process_one_work+0x78f/0x15f0 kernel/workqueue.c:2091
 [<ffffffff81188750>] worker_thread+0xe0/0x10d0 kernel/workqueue.c:2225
 [<ffffffff811985ed>] kthread+0x26d/0x300 kernel/kthread.c:211
 [<ffffffff838aa6aa>] ret_from_fork+0x2a/0x40 arch/x86/entry/entry_64.S:433
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..