device bridge_slave_1 entered promiscuous mode
IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready
IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready
bond0: Enslaving bond_slave_0 as an active interface with an up link
bond0: Enslaving bond_slave_1 as an active interface with an up link
WARNING: CPU: 1 PID: 257 at net/xfrm/xfrm_state.c:2377 xfrm_state_fini+0x30c/0x440 net/xfrm/xfrm_state.c:2377
Kernel panic - not syncing: panic_on_warn set ...

IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready
CPU: 1 PID: 257 Comm: kworker/u4:5 Not tainted 4.19.0-rc1+ #40
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready
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:xfrm_state_fini+0x30c/0x440 net/xfrm/xfrm_state.c:2377
Code: 8b 7d d4 e8 d6 35 1f fa e9 bf fd ff ff 44 89 ef 48 85 c0 74 02 8b 3a e8 c2 35 1f fa 49 39 df 0f 84 e0 fd ff ff e8 04 3f c4 f9 <0f> 0b e9 d9 fd ff ff 44 89 ef e8 a5 35 1f fa e9 e0 fd ff ff 48 89
RSP: 0018:ffff8801d4e5fb38 EFLAGS: 00010293
RAX: ffffffff87a2212c RBX: ffff8801186940a8 RCX: ffff8801d4f63b00
RDX: 0000000000000000 RSI: aaaaaaaaaaaab000 RDI: ffffea00077feb60
RBP: ffff8801d4e5fb98 R08: 0000000000000000 R09: 0000000000000002
R10: 0000000000000000 R11: 000000008040002f R12: ffff8801d4f64400
R13: 00000000958000fc R14: ffff88013ffc8000 R15: ffff88013ffc9440
 xfrm_net_exit+0x5b/0xb0 net/xfrm/xfrm_policy.c:2939
 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..