bond4 (unregistering): Released all slaves
bond3 (unregistering): Released all slaves
bond2 (unregistering): Released all slaves
bond1 (unregistering): Released all slaves
bond0 (unregistering): Released all slaves
WARNING: CPU: 1 PID: 19214 at net/core/dev.c:8069 rollback_registered_many+0xeca/0x1250 net/core/dev.c:8069
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 19214 Comm: kworker/u4:3 Not tainted 4.20.0-rc5-next-20181207+ #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+0x244/0x39d lib/dump_stack.c:113
 panic+0x2ad/0x632 kernel/panic.c:214
 __warn.cold.8+0x20/0x4f kernel/panic.c:571
 report_bug+0x254/0x2d0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271
 do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:290
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:969
RIP: 0010:rollback_registered_many+0xeca/0x1250 net/core/dev.c:8069
Code: 86 19 00 00 48 c7 c6 00 6f dd 88 48 c7 c7 40 6f dd 88 c6 05 10 f5 fe 03 01 e8 72 64 14 fb 0f 0b e9 a6 f9 ff ff e8 16 3d 4b fb <0f> 0b e9 7b f9 ff ff e8 0a 3d 4b fb 0f 0b e9 ea f9 ff ff e8 fe 3c
RSP: 0018:ffff88819c757058 EFLAGS: 00010293
RAX: ffff88819b21c680 RBX: ffff8881c3b19340 RCX: ffffffff8634b413
RDX: 0000000000000000 RSI: ffffffff8634ba9a RDI: 0000000000000001
RBP: ffff88819c7572a0 R08: ffff88819b21c680 R09: fffffbfff1423178
R10: fffffbfff1423178 R11: ffffffff8a118bc7 R12: dffffc0000000000
R13: 0000000000000001 R14: ffffffff8498a270 R15: ffff88819c757138
 unregister_netdevice_many+0xfa/0x4c0 net/core/dev.c:9154
 default_device_exit_batch+0x43a/0x540 net/core/dev.c:9623
 ops_exit_list.isra.5+0x105/0x160 net/core/net_namespace.c:156
 cleanup_net+0x555/0xb10 net/core/net_namespace.c:551
 process_one_work+0xc90/0x1c40 kernel/workqueue.c:2153
 worker_thread+0x17f/0x1390 kernel/workqueue.c:2296
 kthread+0x35a/0x440 kernel/kthread.c:246
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
Kernel Offset: disabled
Rebooting in 86400 seconds..