do_syscall_64+0xfb/0x240
     entry_SYSCALL_64_after_hwframe+0x6d/0x75
------------[ cut here ]------------
WARNING: CPU: 0 PID: 2435 at lib/ref_tracker.c:179 ref_tracker_dir_exit+0x411/0x550 lib/ref_tracker.c:179
Modules linked in:
CPU: 0 PID: 2435 Comm: kworker/u8:7 Not tainted 6.8.0-syzkaller-08073-g480e035fc4c7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
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 d8 c2 9f 06 eb 1a e8 71 be b5 fc 48 8b 1c 24 48 89 df 48 8b 74 24 20 e8 c0 c2 9f 06 90 <0f> 0b 90 48 83 c3 44 48 89 df be 04 00 00 00 e8 db 0f 19 fd 48 89
RSP: 0018:ffffc90009f9f9e0 EFLAGS: 00010246
RAX: 9be244c018892b00 RBX: ffff8880220d81d8 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: ffffffff8baac1e0 RDI: 0000000000000001
RBP: ffffc90009f9fab0 R08: ffffffff92ce1617 R09: 1ffffffff259c2c2
R10: dffffc0000000000 R11: fffffbfff259c2c3 R12: 1ffff1100f663368
R13: dead000000000100 R14: ffff8880220d8228 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30224000 CR3: 000000006ef30000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 net_free net/core/net_namespace.c:462 [inline]
 cleanup_net+0xbf3/0xcc0 net/core/net_namespace.c:658
 process_one_work kernel/workqueue.c:3254 [inline]
 process_scheduled_works+0xa00/0x1770 kernel/workqueue.c:3335
 worker_thread+0x86d/0xd70 kernel/workqueue.c:3416
 kthread+0x2f0/0x390 kernel/kthread.c:388
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243
 </TASK>