team0 (unregistering): Port device team_slave_1 removed
team0 (unregistering): Port device team_slave_0 removed
bond0 (unregistering): Releasing backup interface bond_slave_1
bond0 (unregistering): Releasing backup interface bond_slave_0
bond0 (unregistering): Released all slaves
WARNING: CPU: 0 PID: 171 at net/ipv6/xfrm6_tunnel.c:348 xfrm6_tunnel_net_exit+0x121/0x1f0 net/ipv6/xfrm6_tunnel.c:348
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 171 Comm: kworker/u4:4 Not tainted 4.19.0-rc1+ #41
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+0x14b/0x190 lib/dump_stack.c:113
 panic+0x35d/0x8cb kernel/panic.c:184
 __warn+0x40a/0x590 kernel/panic.c:536
 report_bug+0x65c/0x850 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:179 [inline]
 do_error_trap+0x1c0/0x620 arch/x86/kernel/traps.c:298
 do_invalid_op+0x46/0x50 arch/x86/kernel/traps.c:318
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1000
RIP: 0010:xfrm6_tunnel_net_exit+0x121/0x1f0 net/ipv6/xfrm6_tunnel.c:348
Code: 21 d8 74 15 48 85 db 75 1c e8 0b 16 9d f9 49 81 ff f8 07 00 00 75 c2 eb 28 8b 3a e8 a9 0c f8 f9 48 85 db 74 e4 e8 ef 15 9d f9 <0f> 0b 49 81 ff f8 07 00 00 75 a4 eb 0a 8b 7d d4 e8 8a 0c f8 f9 eb
RSP: 0018:ffff8801d44cfb90 EFLAGS: 00010293
RAX: ffffffff87c94a41 RBX: ffff880072f81200 RCX: ffff8801d4e2d880
RDX: 0000000000000000 RSI: aaaaaaaaaaaab000 RDI: ffffea000804de00
RBP: ffff8801d44cfbc8 R08: 0000000000480020 R09: 0000000000000002
R10: 0000000000000000 R11: ffffffff81355350 R12: 0000000000000000
R13: ffff8801d4e2e180 R14: ffff880156250000 R15: 00000000000007f8
 ops_exit_list net/core/net_namespace.c:153 [inline]
 cleanup_net+0xa1f/0x16c0 net/core/net_namespace.c:551
 process_one_work+0x1605/0x1f40 kernel/workqueue.c:2153
 worker_thread+0x11a2/0x2590 kernel/workqueue.c:2296
 kthread+0x465/0x4a0 kernel/kthread.c:247
 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:416
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..