bond2 (unregistering): Released all slaves
------------[ cut here ]------------
WARNING: CPU: 1 PID: 383 at net/core/dev.c:9518 rollback_registered_many+0x10f3/0x14c0 net/core/dev.c:9518
Modules linked in:
CPU: 1 PID: 383 Comm: kworker/u4:8 Not tainted 5.11.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
RIP: 0010:rollback_registered_many+0x10f3/0x14c0 net/core/dev.c:9518
Code: 96 1b 00 00 48 c7 c6 e0 44 43 8a 48 c7 c7 20 45 43 8a c6 05 b5 47 e8 05 01 e8 c0 e0 bf 01 0f 0b e9 b3 fb ff ff e8 9d 8a 7f fa <0f> 0b e9 8a fb ff ff e8 21 1e c2 fa e9 bd f0 ff ff 4c 89 ef e8 44
RSP: 0018:ffffc900017df9e8 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000056257601 RCX: 0000000000000000
RDX: ffff888012100000 RSI: ffffffff86f2e9f3 RDI: 0000000000000003
RBP: ffff88802080d580 R08: 0000000000000000 R09: 0000000056257601
R10: ffffffff86f2e57c R11: 0000000000000000 R12: 0000000000000000
R13: ffff888059358000 R14: dffffc0000000000 R15: ffff88802080d580
FS:  0000000000000000(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c00020a070 CR3: 000000001ba42000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 unregister_netdevice_many.part.0+0x1a/0x2f0 net/core/dev.c:10719
 unregister_netdevice_many net/core/dev.c:10718 [inline]
 default_device_exit_batch+0x30c/0x3d0 net/core/dev.c:11202
 ops_exit_list+0x10d/0x160 net/core/net_namespace.c:190
 cleanup_net+0x4ea/0xb10 net/core/net_namespace.c:604
 process_one_work+0x98d/0x15f0 kernel/workqueue.c:2275
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2421
 kthread+0x3b1/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296