------------[ cut here ]------------ WARNING: CPU: 1 PID: 82 at net/xfrm/xfrm_policy.c:2976 xfrm_policy_fini+0x280/0x310 net/xfrm/xfrm_policy.c:2976() Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 82 Comm: kworker/u4:2 Not tainted 4.4.147-ga5fc665 #80 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net 0000000000000000 fbde8308ad814290 ffff8800bb98f940 ffffffff81e12a4d ffffffff83a44d40 ffff8800bb980000 ffffffff83f25c20 0000000000000009 0000000000000ba0 ffff8800bb98fa00 ffffffff8140c6a4 0000000041b58ab3 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x124 lib/dump_stack.c:51 [] panic+0x19e/0x38d kernel/panic.c:112 [] warn_slowpath_common.cold.6+0x20/0x20 kernel/panic.c:455 [] warn_slowpath_null+0x29/0x30 kernel/panic.c:492 [] xfrm_policy_fini+0x280/0x310 net/xfrm/xfrm_policy.c:2976 [] xfrm_net_exit+0x25/0x30 net/xfrm/xfrm_policy.c:3037 [] ops_exit_list.isra.6+0xb0/0x160 net/core/net_namespace.c:134 [] cleanup_net+0x321/0x600 net/core/net_namespace.c:452 [] process_one_work+0x7df/0x1600 kernel/workqueue.c:2064 [] worker_thread+0xd9/0xfc0 kernel/workqueue.c:2196 [] kthread+0x268/0x300 kernel/kthread.c:211 [] ret_from_fork+0x55/0x80 arch/x86/entry/entry_64.S:510 Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..