WARNING: CPU: 1 PID: 95 at net/xfrm/xfrm_state.c:2345 xfrm_state_fini+0x218/0x280 net/xfrm/xfrm_state.c:2345
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 95 Comm: kworker/u4:2 Not tainted 5.1.0-rc6+ #163
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:77 [inline]
 dump_stack+0x172/0x1f0 lib/dump_stack.c:113
 panic+0x2cb/0x65c kernel/panic.c:214
 __warn.cold+0x20/0x45 kernel/panic.c:571
 report_bug+0x263/0x2b0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:179 [inline]
 fixup_bug arch/x86/kernel/traps.c:174 [inline]
 do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:272
 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:291
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:973
RIP: 0010:xfrm_state_fini+0x218/0x280 net/xfrm/xfrm_state.c:2345
Code: 41 5e 5d c3 e8 89 07 62 fb 0f 0b e9 09 ff ff ff e8 7d 07 62 fb 0f 0b e9 68 ff ff ff e8 71 07 62 fb 0f 0b eb c6 e8 68 07 62 fb <0f> 0b e9 52 fe ff ff e8 dc 94 9a fb e9 75 fe ff ff e8 f2 94 9a fb
RSP: 0018:ffff8880a9b4fbd0 EFLAGS: 00010293
RAX: ffff8880a9b42280 RBX: ffff8880867680c0 RCX: ffffffff860d2a89
RDX: 0000000000000000 RSI: ffffffff860e85b8 RDI: 0000000000000005
RBP: ffff8880a9b4fbf0 R08: ffff8880a9b42280 R09: ffff8880a9b42b70
R10: 0000000000000000 R11: 0000000000000000 R12: ffff888086769b80
R13: ffff8880a9b4fcc8 R14: ffffffff893f1f38 R15: dffffc0000000000
 xfrm_net_exit+0x25/0x70 net/xfrm/xfrm_policy.c:4140
 ops_exit_list.isra.0+0xb0/0x160 net/core/net_namespace.c:153
 cleanup_net+0x3fb/0x960 net/core/net_namespace.c:552
 process_one_work+0x98e/0x1790 kernel/workqueue.c:2269
 worker_thread+0x98/0xe40 kernel/workqueue.c:2415
 kthread+0x357/0x430 kernel/kthread.c:253
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
Kernel Offset: disabled
Rebooting in 86400 seconds..