------------[ cut here ]------------
WARNING: fs/namespace.c:1375 at cleanup_mnt+0x33f/0x430, CPU#1: syz-executor.7/297
Modules linked in:
CPU: 1 UID: 0 PID: 297 Comm: syz-executor.7 Tainted: G        W           6.17.0-rc3-next-20250829 #1 PREEMPT(voluntary) 
Tainted: [W]=WARN
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:cleanup_mnt+0x33f/0x430
Code: c7 a0 45 d1 85 e8 01 7c fa 02 49 8d 7d 40 5b 48 c7 c6 10 e2 be 81 5d 41 5c 41 5d 41 5e 41 5f e9 57 b3 9c ff e8 82 46 b4 ff 90 <0f> 0b 90 e9 e6 fc ff ff e8 74 46 b4 ff 4c 89 ef e8 6c d7 06 00 e9
RSP: 0018:ffff88801bddfe20 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000002 RCX: ffffffff81bf9de5
RDX: ffff888017808000 RSI: ffffffff81bfa0fe RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000002 R11: 0000000000000001 R12: ffff8880178088d8
R13: ffff888015ca6fc0 R14: 0000000000000001 R15: ffff888015ca7000
FS:  000055558915a400(0000) GS:ffff8880e56dd000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555589163c58 CR3: 00000000461ee000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 task_work_run+0x172/0x280
 exit_to_user_mode_loop+0xef/0x110
 do_syscall_64+0x2f7/0x360
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3364925f87
Code: ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fffb493a818 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000017 RCX: 00007f3364925f87
RDX: 00007fffb493a8e9 RSI: 000000000000000a RDI: 00007fffb493a8e0
RBP: 00007fffb493a8e0 R08: 00000000ffffffff R09: 00007fffb493a6b0
R10: 000055558915bc7b R11: 0000000000000246 R12: 00007f336497e105
R13: 00007fffb493b9a0 R14: 000055558915bc20 R15: 00007fffb493b9e0
 </TASK>
irq event stamp: 195899
hardirqs last  enabled at (195907): [<ffffffff81541b18>] __up_console_sem+0x78/0x80
hardirqs last disabled at (195916): [<ffffffff81541afd>] __up_console_sem+0x5d/0x80
softirqs last  enabled at (195674): [<ffffffff813bafcc>] handle_softirqs+0x50c/0x770
softirqs last disabled at (195643): [<ffffffff813bb364>] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
loop6: detected capacity change from 0 to 16