------------[ cut here ]------------
WARNING: CPU: 0 PID: 5037 at net/l2tp/l2tp_core.c:1881 l2tp_exit_net+0x165/0x170 net/l2tp/l2tp_core.c:1881
Modules linked in:
CPU: 0 UID: 0 PID: 5037 Comm: kworker/u8:8 Not tainted 6.12.0-syzkaller-05480-gfcc79e1714e8 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: netns cleanup_net
RIP: 0010:l2tp_exit_net+0x165/0x170 net/l2tp/l2tp_core.c:1881
Code: 0f 0b 90 e9 3b ff ff ff e8 38 79 94 f6 eb 05 e8 31 79 94 f6 90 0f 0b 90 e9 7a ff ff ff e8 23 79 94 f6 eb 05 e8 1c 79 94 f6 90 <0f> 0b 90 eb b5 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc900100f7a98 EFLAGS: 00010293
RAX: ffffffff8b0089bd RBX: ffff88814e017888 RCX: ffff888034ffda00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002
RBP: ffffc900100f7bb0 R08: ffffffff8bd23c06 R09: 1ffffffff207e70e
R10: dffffc0000000000 R11: fffffbfff207e70f R12: dffffc0000000000
R13: 1ffffffff201f638 R14: ffff88814e017930 R15: ffff88814e017840
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000200001c0 CR3: 0000000063a62000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ops_exit_list net/core/net_namespace.c:172 [inline]
 cleanup_net+0x802/0xcc0 net/core/net_namespace.c:632
 process_one_work kernel/workqueue.c:3229 [inline]
 process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310
 worker_thread+0x870/0xd30 kernel/workqueue.c:3391
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>