ndisc_net_init+0xa7/0x2b0 net/ipv6/ndisc.c:2001
     ops_init+0x31e/0x590 net/core/net_namespace.c:138
     setup_net+0x287/0x9e0 net/core/net_namespace.c:362
     copy_net_ns+0x33f/0x570 net/core/net_namespace.c:516
     create_new_namespaces+0x425/0x7b0 kernel/nsproxy.c:110
     unshare_nsproxy_namespaces+0x124/0x180 kernel/nsproxy.c:228
     ksys_unshare+0x57d/0xa70 kernel/fork.c:3334
     __do_sys_unshare kernel/fork.c:3405 [inline]
     __se_sys_unshare kernel/fork.c:3403 [inline]
     __x64_sys_unshare+0x38/0x40 kernel/fork.c:3403
     do_syscall_x64 arch/x86/entry/common.c:52 [inline]
     do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
     entry_SYSCALL_64_after_hwframe+0x77/0x7f
------------[ cut here ]------------
WARNING: CPU: 1 PID: 12 at lib/ref_tracker.c:179 ref_tracker_dir_exit+0x411/0x550 lib/ref_tracker.c:179
Modules linked in:
CPU: 1 UID: 0 PID: 12 Comm: kworker/u8:1 Not tainted 6.13.0-rc2-syzkaller-00390-g9bc5c9515b48 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024
Workqueue: netns cleanup_net
RIP: 0010:ref_tracker_dir_exit+0x411/0x550 lib/ref_tracker.c:179
Code: 48 8b 1c 24 48 89 df 48 8b 74 24 20 e8 f8 c5 d2 06 eb 1a e8 01 1a a5 fc 48 8b 1c 24 48 89 df 48 8b 74 24 20 e8 e0 c5 d2 06 90 <0f> 0b 90 48 83 c3 44 48 89 df be 04 00 00 00 e8 ab 7d 0b fd 48 89
RSP: 0018:ffffc900001179e0 EFLAGS: 00010246
RAX: 1d1b486c6cbc9c00 RBX: ffff888033c65ca0 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: ffffffff8c0a9760 RDI: 0000000000000001
RBP: ffffc90000117ab0 R08: ffffffff942b3967 R09: 1ffffffff285672c
R10: dffffc0000000000 R11: fffffbfff285672d R12: 1ffff110065807a8
R13: dead000000000100 R14: ffff888033c65cf0 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f58baabd378 CR3: 000000000e736000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 net_free net/core/net_namespace.c:473 [inline]
 cleanup_net+0xc72/0xd50 net/core/net_namespace.c:671
 process_one_work kernel/workqueue.c:3229 [inline]
 process_scheduled_works+0xa66/0x1840 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>