------------[ cut here ]------------
WARNING: CPU: 2 PID: 622 at lib/ref_tracker.c:179 ref_tracker_dir_exit+0x3e3/0x680 lib/ref_tracker.c:179
Modules linked in:
CPU: 2 PID: 622 Comm: kworker/u32:5 Not tainted 6.8.0-syzkaller-01185-g855684c7d938 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Workqueue: netns cleanup_net
RIP: 0010:ref_tracker_dir_exit+0x3e3/0x680 lib/ref_tracker.c:179
Code: 11 02 00 00 4d 39 f5 49 8b 06 4d 89 f7 0f 85 0e ff ff ff 48 8b 2c 24 e8 bb d8 e5 fc 48 8b 74 24 18 48 89 ef e8 7e 01 25 06 90 <0f> 0b 90 e8 a5 d8 e5 fc 48 8d 5d 44 be 04 00 00 00 48 89 df e8 d4
RSP: 0018:ffffc90003db7b58 EFLAGS: 00010246
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: 0000000000000001 RSI: ffffffff8b0cc200 RDI: 0000000000000001
RBP: ffff888108623b60 R08: 0000000000000001 R09: fffffbfff27ae04c
R10: ffffffff93d70267 R11: 0000000000000003 R12: ffff888108623bb0
R13: ffff888108623bb0 R14: ffff888108623bb0 R15: ffff888108623bb0
FS:  0000000000000000(0000) GS:ffff88806b400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000056477da3b300 CR3: 0000000041cce000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 net_free net/core/net_namespace.c:452 [inline]
 net_free net/core/net_namespace.c:446 [inline]
 cleanup_net+0x8d7/0xb20 net/core/net_namespace.c:639
 process_one_work+0x9a2/0x1a50 kernel/workqueue.c:3254
 process_scheduled_works kernel/workqueue.c:3335 [inline]
 worker_thread+0x6c8/0xf70 kernel/workqueue.c:3416
 kthread+0x2c1/0x3a0 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243
 </TASK>