------------[ cut here ]------------ WARNING: CPU: 0 PID: 19185 at net/xfrm/xfrm_policy.c:3057 xfrm_policy_fini+0x26f/0x2f0 net/xfrm/xfrm_policy.c:3057 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 19185 Comm: kworker/u4:3 Not tainted 4.9.143+ #76 Workqueue: netns cleanup_net ffff880155d87928 ffffffff81b43899 ffffffff82a39060 00000000ffffffff ffffffff82cbba00 0000000000000000 0000000000000009 ffff880155d879e8 ffffffff813f7285 0000000041b58ab3 ffffffff82e2e83b ffffffff813f70c6 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] panic+0x1bf/0x39f kernel/panic.c:179 [] __warn.cold.8+0x2f/0x2f kernel/panic.c:542 [] warn_slowpath_null+0x2c/0x40 kernel/panic.c:585 [] xfrm_policy_fini+0x26f/0x2f0 net/xfrm/xfrm_policy.c:3057 [] xfrm_net_exit+0x25/0x30 net/xfrm/xfrm_policy.c:3118 [] ops_exit_list.isra.0+0xb0/0x160 net/core/net_namespace.c:136 [] cleanup_net+0x3f2/0x8b0 net/core/net_namespace.c:473 [] process_one_work+0x831/0x15f0 kernel/workqueue.c:2092 [] worker_thread+0xd6/0x1140 kernel/workqueue.c:2226 [] kthread+0x26d/0x300 kernel/kthread.c:211 [] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373 Kernel Offset: disabled Rebooting in 86400 seconds..