unshare_nsproxy_namespaces+0x124/0x180 kernel/nsproxy.c:228
     ksys_unshare+0x619/0xc10 kernel/fork.c:3328
     __do_sys_unshare kernel/fork.c:3399 [inline]
     __se_sys_unshare kernel/fork.c:3397 [inline]
     __x64_sys_unshare+0x38/0x40 kernel/fork.c:3397
     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: 0 PID: 12 at lib/ref_tracker.c:179 ref_tracker_dir_exit+0x411/0x550 lib/ref_tracker.c:179
Modules linked in:
CPU: 0 UID: 0 PID: 12 Comm: kworker/u8:1 Not tainted 6.11.0-rc4-syzkaller-00232-g7c5f7b16fe1b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
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 18 6f d7 06 eb 1a e8 d1 f2 a7 fc 48 8b 1c 24 48 89 df 48 8b 74 24 20 e8 00 6f d7 06 90 <0f> 0b 90 48 83 c3 44 48 89 df be 04 00 00 00 e8 4b 86 0f fd 48 89
RSP: 0018:ffffc900001179e0 EFLAGS: 00010246
RAX: 7055fad3d5e70e00 RBX: ffff88806633bd58 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: ffffffff8c0ad560 RDI: 0000000000000001
RBP: ffffc90000117ab0 R08: ffffffff93742917 R09: 1ffffffff26e8522
R10: dffffc0000000000 R11: fffffbfff26e8523 R12: 1ffff1100ca68788
R13: dead000000000100 R14: ffff88806633bda8 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8251d406a8 CR3: 000000005cf26000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 net_free net/core/net_namespace.c:465 [inline]
 cleanup_net+0xbf6/0xcc0 net/core/net_namespace.c:661
 process_one_work kernel/workqueue.c:3231 [inline]
 process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312
 worker_thread+0x86d/0xd40 kernel/workqueue.c:3390
 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>