path_mount+0x1637/0x1dd0
 __x64_sys_mount+0x27b/0x300
 do_syscall_64+0xbf/0x360
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
------------[ cut here ]------------
WARNING: fs/namespace.c:1434 at mntput_no_expire+0x78e/0xbe0, CPU#1: syz-executor.2/285
Modules linked in:
CPU: 1 UID: 0 PID: 285 Comm: syz-executor.2 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:mntput_no_expire+0x78e/0xbe0
Code: 05 16 42 81 04 01 e8 31 f8 91 ff e9 41 fc ff ff e8 b7 50 b4 ff 31 ff 44 89 ee e8 dd 4b b4 ff 45 85 ed 79 09 e8 a3 50 b4 ff 90 <0f> 0b 90 e8 9a 50 b4 ff e8 75 f6 fb 02 31 ff 89 c5 89 c6 e8 ba 4b
RSP: 0018:ffff88801769fce0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 1ffff11002ed3fa1 RCX: ffffffff81bf96d3
RDX: ffff888017a1b700 RSI: ffffffff81bf96dd RDI: 0000000000000005
RBP: ffff88801fb0b340 R08: 0000000000000001 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000001 R12: ffff88801769fd48
R13: 00000000ffffffff R14: ffff88801fb0b340 R15: ffff88801fb0b428
FS:  0000555571d13400(0000) GS:ffff8880e56dd000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7c9c3e0fe8 CR3: 000000003bdb3000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 path_umount+0x6e0/0x1100
 __x64_sys_umount+0x15c/0x190
 do_syscall_64+0xbf/0x360
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1009891f87
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:00007ffc075673c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: ffffffffffffffda RBX: 00000000000004db RCX: 00007f1009891f87
RDX: 00007ffc0756749b RSI: 000000000000000a RDI: 00007ffc07567490
RBP: 00007ffc07567490 R08: 00000000ffffffff R09: 00007ffc07567260
R10: 0000555571d14c7b R11: 0000000000000246 R12: 00007f10098ea105
R13: 00007ffc07568550 R14: 0000555571d14c20 R15: 00007ffc07568590
 </TASK>
irq event stamp: 2948661
hardirqs last  enabled at (2948669): [<ffffffff81541b18>] __up_console_sem+0x78/0x80
hardirqs last disabled at (2948678): [<ffffffff81541afd>] __up_console_sem+0x5d/0x80
softirqs last  enabled at (2948530): [<ffffffff813bafcc>] handle_softirqs+0x50c/0x770
softirqs last disabled at (2948499): [<ffffffff813bb364>] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
FAT-fs (loop0): unable to read boot sector
FAT-fs (loop6): unable to read boot sector
FAT-fs (loop1): unable to read boot sector
FAT-fs (loop2): unable to read boot sector
blk_print_req_error: 9 callbacks suppressed
I/O error, dev loop2, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
I/O error, dev loop0, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
FAT-fs (loop2): unable to read boot sector
FAT-fs (loop0): unable to read boot sector
I/O error, dev loop1, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
FAT-fs (loop1): unable to read boot sector
I/O error, dev loop7, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
I/O error, dev loop5, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
I/O error, dev loop6, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
FAT-fs (loop7): unable to read boot sector
FAT-fs (loop6): unable to read boot sector
FAT-fs (loop5): unable to read boot sector
I/O error, dev loop3, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
FAT-fs (loop3): unable to read boot sector