FAT-fs (loop1): bogus number of directory entries (114)
------------[ cut here ]------------
FAT-fs (loop1): Can't find a valid FAT filesystem
WARNING: fs/namespace.c:1434 at mntput_no_expire+0x78e/0xbe0, CPU#1: syz-executor.5/4679
Modules linked in:
CPU: 1 UID: 0 PID: 4679 Comm: syz-executor.5 Tainted: G        W           6.17.0-rc4-next-20250901 #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 d6 30 81 04 01 e8 71 df 91 ff e9 41 fc ff ff e8 27 47 b4 ff 31 ff 44 89 ee e8 4d 42 b4 ff 45 85 ed 79 09 e8 13 47 b4 ff 90 <0f> 0b 90 e8 0a 47 b4 ff e8 b5 2d fc 02 31 ff 89 c5 89 c6 e8 2a 42
RSP: 0018:ffff888046477c30 EFLAGS: 00010212
RAX: 0000000000003b02 RBX: 1ffff11008c8ef8b RCX: ffffc90001fd1000
RDX: 0000000000040000 RSI: ffffffff81bfaf9d RDI: 0000000000000005
RBP: ffff88801e991c00 R08: 0000000000000001 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000001 R12: ffff888046477c98
R13: 00000000ffffffff R14: dead000000000100 R15: ffff88801e991c00
FS:  00007f78a4d5e700(0000) GS:ffff8880e56d8000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d026000 CR3: 000000000de74000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 namespace_unlock+0x7f1/0x810
 put_mnt_ns+0xf5/0x120
 free_nsproxy+0x3a/0x400
 switch_task_namespaces+0xe2/0x100
 ksys_unshare+0x520/0xa10
 __x64_sys_unshare+0x31/0x40
 do_syscall_64+0xbf/0x360
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f78a77e8b19
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f78a4d5e188 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 00007f78a78fbf60 RCX: 00007f78a77e8b19
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000006020400
RBP: 00007f78a7842f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffeb16e854f R14: 00007f78a4d5e300 R15: 0000000000022000
 </TASK>
irq event stamp: 6631
hardirqs last  enabled at (6639): [<ffffffff81541b18>] __up_console_sem+0x78/0x80
hardirqs last disabled at (6648): [<ffffffff81541afd>] __up_console_sem+0x5d/0x80
softirqs last  enabled at (6666): [<ffffffff813bafcc>] handle_softirqs+0x50c/0x770
softirqs last disabled at (6657): [<ffffffff813bb364>] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
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WARNING: fs/namespace.c:1434 at mntput_no_expire+0x78e/0xbe0, CPU#0: syz-executor.5/4679
Modules linked in:
CPU: 0 UID: 0 PID: 4679 Comm: syz-executor.5 Tainted: G        W           6.17.0-rc4-next-20250901 #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 d6 30 81 04 01 e8 71 df 91 ff e9 41 fc ff ff e8 27 47 b4 ff 31 ff 44 89 ee e8 4d 42 b4 ff 45 85 ed 79 09 e8 13 47 b4 ff 90 <0f> 0b 90 e8 0a 47 b4 ff e8 b5 2d fc 02 31 ff 89 c5 89 c6 e8 2a 42
RSP: 0018:ffff8880464779c0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 1ffff11008c8ef3d RCX: ffffffff81bfaf93
RDX: ffff8880462c0000 RSI: ffffffff81bfaf9d RDI: 0000000000000005
RBP: ffff88801c2cba40 R08: 0000000000000001 R09: 0000000000000000
R10: 00000000fffffffe R11: 0000000000000001 R12: ffff888046477a28
R13: 00000000fffffffe R14: dead000000000100 R15: ffff88801c2cba40
FS:  0000000000000000(0000) GS:ffff8880e55d8000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002099d000 CR3: 0000000045922000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 namespace_unlock+0x7f1/0x810
 put_mnt_ns+0xf5/0x120
 free_nsproxy+0x3a/0x400
 switch_task_namespaces+0xe2/0x100
 do_exit+0x841/0x2970
 do_group_exit+0xd3/0x2a0
 get_signal+0x2315/0x2340
 arch_do_signal_or_restart+0x80/0x790
 exit_to_user_mode_loop+0x8b/0x110
 do_syscall_64+0x2f7/0x360
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f78a77e8b19
Code: Unable to access opcode bytes at 0x7f78a77e8aef.
RSP: 002b:00007f78a4d5e188 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
RAX: 0000000000000000 RBX: 00007f78a78fbf60 RCX: 00007f78a77e8b19
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000006020400
RBP: 00007f78a7842f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffeb16e854f R14: 00007f78a4d5e300 R15: 0000000000022000
 </TASK>
irq event stamp: 7607
hardirqs last  enabled at (7615): [<ffffffff81541b18>] __up_console_sem+0x78/0x80
hardirqs last disabled at (7624): [<ffffffff81541afd>] __up_console_sem+0x5d/0x80
softirqs last  enabled at (7112): [<ffffffff813bafcc>] handle_softirqs+0x50c/0x770
softirqs last disabled at (7641): [<ffffffff813bb364>] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
loop2: detected capacity change from 0 to 32767
FAT-fs (loop1): bogus number of directory entries (114)
FAT-fs (loop1): Can't find a valid FAT filesystem
FAT-fs (loop1): bogus number of directory entries (114)
FAT-fs (loop1): Can't find a valid FAT filesystem