do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
     __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386
     do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
     entry_SYSENTER_compat_after_hwframe+0x84/0x8e
------------[ cut here ]------------
WARNING: CPU: 2 PID: 7488 at lib/ref_tracker.c:179 ref_tracker_dir_exit+0x3e3/0x680 lib/ref_tracker.c:179
Modules linked in:
CPU: 2 UID: 0 PID: 7488 Comm: kworker/u32:11 Not tainted 6.13.0-rc4-syzkaller-00012-g9b2ffa6148b1 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+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 4b 33 d1 fc 48 8b 74 24 18 48 89 ef e8 3e 99 54 06 90 <0f> 0b 90 e8 35 33 d1 fc 48 8d 5d 44 be 04 00 00 00 48 89 df e8 94
RSP: 0018:ffffc90007e3fb38 EFLAGS: 00010246
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: 0000000000000001 RSI: ffffffff8b4cd280 RDI: 0000000000000001
RBP: ffff88804c125ca0 R08: 0000000000000001 R09: fffffbfff2d36dc1
R10: ffffffff969b6e0f R11: 0000000000000003 R12: ffff88804c125cf0
R13: ffff88804c125cf0 R14: ffff88804c125cf0 R15: ffff88804c125cf0
FS:  0000000000000000(0000) GS:ffff88802b600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055f8b7104680 CR3: 000000000db7e000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 net_free net/core/net_namespace.c:473 [inline]
 net_free net/core/net_namespace.c:467 [inline]
 cleanup_net+0x990/0xbd0 net/core/net_namespace.c:671
 process_one_work+0x958/0x1b30 kernel/workqueue.c:3229
 process_scheduled_works kernel/workqueue.c:3310 [inline]
 worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>