------------[ cut here ]------------
refcount_t: decrement hit 0; leaking memory.
WARNING: CPU: 1 PID: 12926 at lib/refcount.c:31 refcount_warn_saturate+0x17c/0x1a0 lib/refcount.c:31
Modules linked in:
CPU: 1 PID: 12926 Comm: kworker/u4:13 Not tainted 5.16.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
RIP: 0010:refcount_warn_saturate+0x17c/0x1a0 lib/refcount.c:31
Code: f4 8a 31 c0 e8 d5 46 38 fd 0f 0b e9 64 ff ff ff e8 29 6b 6e fd c6 05 a6 40 f5 09 01 48 c7 c7 80 fe f4 8a 31 c0 e8 b4 46 38 fd <0f> 0b e9 43 ff ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c a2 fe ff
RSP: 0018:ffffc90014917908 EFLAGS: 00010246
RAX: 37f096f24d3c3e00 RBX: 0000000000000004 RCX: ffff888022b58000
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 0000000000000004 R08: ffffffff8169fb82 R09: ffffed10173667b1
R10: ffffed10173667b1 R11: 0000000000000000 R12: dffffc0000000000
R13: ffffc900149179c0 R14: ffff88808af2a5b0 R15: ffff88808af2a5a0
FS:  0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3375667000 CR3: 000000001d7df000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 netdev_run_todo+0xaa0/0xcf0 net/core/dev.c:10627
 default_device_exit_batch+0x450/0x4b0 net/core/dev.c:11608
 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>