------------[ cut here ]------------
WARNING: CPU: 1 PID: 12970 at fs/proc/proc_sysctl.c:1558 retire_sysctl_set+0x48/0x60 fs/proc/proc_sysctl.c:1558
Modules linked in:
CPU: 1 UID: 0 PID: 12970 Comm: kworker/u8:23 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Workqueue: netns cleanup_net
RIP: 0010:retire_sysctl_set+0x48/0x60 fs/proc/proc_sysctl.c:1558
Code: 00 fc ff df 80 3c 08 00 74 08 48 89 df e8 60 eb c6 ff 48 83 3b 00 75 0c e8 c5 6d 63 ff 5b c3 cc cc cc cc cc e8 b9 6d 63 ff 90 <0f> 0b 90 5b e9 0f 1b 21 09 cc 66 66 66 66 66 2e 0f 1f 84 00 00 00
RSP: 0018:ffffc9001aeaf8d0 EFLAGS: 00010293
RAX: ffffffff825c4107 RBX: ffff8880328d4b60 RCX: ffff888052e9bc00
RDX: 0000000000000000 RSI: ffffffff8dba9b22 RDI: ffff8880328d4b00
RBP: ffffc9001aeaf9b0 R08: ffffffff8fa3a837 R09: 1ffffffff1f47506
R10: dffffc0000000000 R11: ffffffff8b36bf30 R12: ffffffff8f837fa0
R13: 1ffff920035d5f40 R14: ffffffff8f837f80 R15: ffff8880328d4928
FS:  0000000000000000(0000) GS:ffff888125d12000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc1512d4eb8 CR3: 000000007bb22000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 ops_exit_list net/core/net_namespace.c:198 [inline]
 ops_undo_list+0x49a/0x990 net/core/net_namespace.c:251
 cleanup_net+0x4c5/0x800 net/core/net_namespace.c:682
 process_one_work kernel/workqueue.c:3236 [inline]
 process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3319
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400
 kthread+0x70e/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x439/0x7d0 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>