bond0 (unregistering): (slave bond4): Releasing backup interface
bond4 (unregistering): Released all slaves
bond3 (unregistering): Released all slaves
------------[ cut here ]------------
WARNING: CPU: 1 PID: 978 at net/core/dev.c:11103 unregister_netdevice_many+0x14f1/0x19e0 net/core/dev.c:11103
Modules linked in:
CPU: 1 PID: 978 Comm: kworker/u4:4 Not tainted 5.16.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
RIP: 0010:unregister_netdevice_many+0x14f1/0x19e0 net/core/dev.c:11103
Code: 74 08 48 89 df e8 ff 19 ad f9 48 8b 1b 48 89 5c 24 38 4c 39 fb 0f 84 0c 01 00 00 e8 49 46 61 f9 e9 34 f6 ff ff e8 3f 46 61 f9 <0f> 0b e9 2a ff ff ff e8 33 46 61 f9 0f 0b e9 7a ff ff ff e8 27 46
RSP: 0018:ffffc900048278c0 EFLAGS: 00010293
RAX: ffffffff88235331 RBX: ffff888036f240a0 RCX: ffff88801c508000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90004827a50 R08: ffffffff88235215 R09: fffffbfff1b70385
R10: fffffbfff1b70385 R11: 0000000000000000 R12: 0000000000000002
R13: dffffc0000000000 R14: ffff888023693000 R15: ffffc90004827af0
FS:  0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe400a5f5b0 CR3: 0000000019d7c000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 default_device_exit_batch+0x44b/0x4b0 net/core/dev.c:11610
 ops_exit_list net/core/net_namespace.c:171 [inline]
 cleanup_net+0x7ec/0xc50 net/core/net_namespace.c:593
 process_one_work+0x853/0x1140 kernel/workqueue.c:2298
 worker_thread+0xac1/0x1320 kernel/workqueue.c:2445
 kthread+0x468/0x490 kernel/kthread.c:327
 ret_from_fork+0x1f/0x30
 </TASK>