__do_sys_sendfile64 fs/read_write.c:1424 [inline]
     __se_sys_sendfile64 fs/read_write.c:1410 [inline]
     __x64_sys_sendfile64+0x1da/0x220 fs/read_write.c:1410
     do_syscall_x64 arch/x86/entry/common.c:52 [inline]
     do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
     entry_SYSCALL_64_after_hwframe+0x77/0x7f
------------[ cut here ]------------
WARNING: CPU: 1 PID: 11772 at lib/ref_tracker.c:179 ref_tracker_dir_exit+0x3e3/0x680 lib/ref_tracker.c:179
Modules linked in:
CPU: 1 UID: 0 PID: 11772 Comm: kworker/u8:30 Not tainted 6.14.0-rc3-syzkaller-00060-g6537cfb395f3 #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+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 5b 16 c8 fc 48 8b 74 24 18 48 89 ef e8 6e bd 65 06 90 <0f> 0b 90 e8 45 16 c8 fc 48 8d 5d 44 be 04 00 00 00 48 89 df e8 c4
RSP: 0018:ffffc900051e7ac8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: 0000000000000001 RSI: ffffffff8b6ceca0 RDI: 0000000000000001
RBP: ffff8880612601e0 R08: 0000000000000001 R09: fffffbfff2dd79ba
R10: ffffffff96ebcdd7 R11: 0000000000002ba2 R12: ffff888061260230
R13: ffff888061260230 R14: ffff888061260230 R15: ffff888061260230
FS:  0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30110ff8 CR3: 000000007da02000 CR4: 00000000003526f0
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+0x99f/0xbf0 net/core/net_namespace.c:675
 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3236
 process_scheduled_works kernel/workqueue.c:3317 [inline]
 worker_thread+0x6c8/0xf00 kernel/workqueue.c:3398
 kthread+0x3af/0x750 kernel/kthread.c:464
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>