do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:346
     entry_SYSENTER_compat_after_hwframe+0x70/0x7a
------------[ cut here ]------------
WARNING: CPU: 2 PID: 80 at lib/ref_tracker.c:179 ref_tracker_dir_exit+0x3e3/0x680 lib/ref_tracker.c:179
Modules linked in:
CPU: 2 PID: 80 Comm: kworker/u16:4 Not tainted 6.7.0-syzkaller-06082-g22d29f1112c8 #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: 0d 02 00 00 4d 39 f5 49 8b 06 4d 89 f7 0f 85 0e ff ff ff 48 8b 2c 24 e8 db 4f f0 fc 48 8b 74 24 18 48 89 ef e8 ae c5 f3 05 90 <0f> 0b 90 e8 c5 4f f0 fc 48 8d 5d 44 be 04 00 00 00 48 89 df e8 f4
RSP: 0000:ffffc90000e5fb78 EFLAGS: 00010246
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: 0000000000000001 RSI: ffffffff8b2f82c0 RDI: 0000000000000001
RBP: ffff888078583b60 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff8f3a1b97 R11: 746e652020202020 R12: ffff888078583bb0
R13: ffff888078583bb0 R14: ffff888078583bb0 R15: ffff888078583bb0
FS:  0000000000000000(0000) GS:ffff88802c800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3fb8e5e200 CR3: 000000001a0ab000 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+0x8d4/0xb20 net/core/net_namespace.c:639
 process_one_work+0x886/0x15d0 kernel/workqueue.c:2633
 process_scheduled_works kernel/workqueue.c:2706 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2787
 kthread+0x2c6/0x3a0 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
 </TASK>