------------[ cut here ]------------ WARNING: CPU: 1 PID: 6 at net/xfrm/xfrm_state.c:2139 xfrm_state_fini+0x297/0x330 net/xfrm/xfrm_state.c:2139() Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 6 Comm: kworker/u4:0 Not tainted 4.4.148-gf057ff9 #81 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net 0000000000000000 0a2f072abdd1482d ffff8801d9a17958 ffffffff81e1448d ffffffff83a44e40 ffff8801d9a08000 ffffffff83f26620 0000000000000009 000000000000085b ffff8801d9a17a18 ffffffff8140ce24 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_state_fini+0x297/0x330 net/xfrm/xfrm_state.c:2139 [] xfrm_net_exit+0x2d/0x30 net/xfrm/xfrm_policy.c:3038 [] 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..