__do_sys_unshare kernel/fork.c:3413 [inline]
     __se_sys_unshare kernel/fork.c:3411 [inline]
     __x64_sys_unshare+0x38/0x40 kernel/fork.c:3411
     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: 8637 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: 8637 Comm: kworker/u8:13 Not tainted 6.14.0-rc3-syzkaller-00607-g5d6ba5ab8582 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
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 58 92 dd 06 eb 1a e8 c1 28 94 fc 48 8b 1c 24 48 89 df 48 8b 74 24 20 e8 40 92 dd 06 90 <0f> 0b 90 48 83 c3 44 48 89 df be 04 00 00 00 e8 1b 68 fb fc 48 89
RSP: 0018:ffffc90003b4f940 EFLAGS: 00010246
RAX: 767fe9abed4a2f00 RBX: ffff88807da52020 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: ffffffff8c2aa440 RDI: 0000000000000001
RBP: ffffc90003b4fa10 R08: ffffffff9454998f R09: 1ffffffff28a9331
R10: dffffc0000000000 R11: fffffbfff28a9332 R12: 1ffff1100525d820
R13: dead000000000100 R14: ffff88807da52070 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055555d2e8808 CR3: 0000000060134000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 net_passive_dec net/core/net_namespace.c:473 [inline]
 cleanup_net+0xc82/0xd60 net/core/net_namespace.c:675
 process_one_work kernel/workqueue.c:3236 [inline]
 process_scheduled_works+0xabe/0x18e0 kernel/workqueue.c:3317
 worker_thread+0x870/0xd30 kernel/workqueue.c:3398
 kthread+0x7a9/0x920 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>