------------[ cut here ]------------ WARNING: CPU: 1 PID: 3491 at net/xfrm/xfrm_state.c:2148 xfrm_state_fini+0x297/0x330 net/xfrm/xfrm_state.c:2148() Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 3491 Comm: kworker/u4:14 Not tainted 4.4.174+ #4 Workqueue: netns cleanup_net 0000000000000000 f612ef5246db2e73 ffff8801cf66f910 ffffffff81aad1a1 0000000000000000 ffffffff82835ee0 ffffffff82a9bc00 0000000000000864 ffffffff82567fb7 ffff8801cf66f9f0 ffffffff813a48c2 0000000041b58ab3 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x120 lib/dump_stack.c:51 [] panic+0x1b9/0x37b kernel/panic.c:112 [] warn_slowpath_common kernel/panic.c:455 [inline] [] warn_slowpath_common.cold+0x20/0x20 kernel/panic.c:435 [] warn_slowpath_null+0x2a/0x30 kernel/panic.c:492 [] xfrm_state_fini+0x297/0x330 net/xfrm/xfrm_state.c:2148 [] xfrm_net_exit+0x2e/0x40 net/xfrm/xfrm_policy.c:3044 [] ops_exit_list.isra.0+0xb0/0x160 net/core/net_namespace.c:134 [] cleanup_net+0x3d6/0x860 net/core/net_namespace.c:452 [] process_one_work+0x825/0x1720 kernel/workqueue.c:2064 [] worker_thread+0x4e4/0xf50 kernel/workqueue.c:2196 [] kthread+0x273/0x310 kernel/kthread.c:211 [] ret_from_fork+0x55/0x80 arch/x86/entry/entry_64.S:537 Kernel Offset: disabled Rebooting in 86400 seconds..