WARNING: CPU: 1 PID: 5 at net/xfrm/xfrm_state.c:2337 xfrm_state_fini+0x46a/0x620 net/xfrm/xfrm_state.c:2337 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 5 Comm: kworker/u4:0 Not tainted 4.15.0-rc7-next-20180112+ #96 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:53 panic+0x1e4/0x41c kernel/panic.c:183 __warn+0x1dc/0x200 kernel/panic.c:547 report_bug+0x211/0x2d0 lib/bug.c:184 fixup_bug.part.11+0x37/0x80 arch/x86/kernel/traps.c:178 fixup_bug arch/x86/kernel/traps.c:247 [inline] do_error_trap+0x2d7/0x3e0 arch/x86/kernel/traps.c:296 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315 invalid_op+0x22/0x40 arch/x86/entry/entry_64.S:1085 RIP: 0010:xfrm_state_fini+0x46a/0x620 net/xfrm/xfrm_state.c:2337 RSP: 0018:ffff8801d9f2f150 EFLAGS: 00010293 RAX: ffff8801d9f20140 RBX: ffff8801bbda6180 RCX: ffffffff84b355ea RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff868c9138 RBP: ffff8801d9f2f2a8 R08: 1ffff1003b3e5dbd R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff1003b3e5e2c R13: ffff8801d9f2f280 R14: 1ffff1003b3e5e30 R15: ffff8801bbda74c0 xfrm_net_exit+0x25/0x70 net/xfrm/xfrm_policy.c:2978 ops_exit_list.isra.6+0xae/0x150 net/core/net_namespace.c:142 cleanup_net+0x5c7/0xb50 net/core/net_namespace.c:484 process_one_work+0xbbf/0x1af0 kernel/workqueue.c:2112 worker_thread+0x223/0x1990 kernel/workqueue.c:2246 kthread+0x33c/0x400 kernel/kthread.c:238 ret_from_fork+0x37/0x50 arch/x86/entry/entry_64.S:530 Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..