EXT4-fs (loop5): failed to parse options in superblock: ~¤ü-‹\J;–p·:¸A5âN g£}Î('¾›|ÁG¥<d…Ôsø ŸûÁÛ�~º‚g<¥Ä²‚¯3Ójä¬i
EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none.
------------[ cut here ]------------
WARNING: fs/namespace.c:1434 at mntput_no_expire+0x78e/0xbe0, CPU#1: syz-executor.0/4062
Modules linked in:
CPU: 1 UID: 0 PID: 4062 Comm: syz-executor.0 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:ffff88801d977c30 EFLAGS: 00010216
RAX: 0000000000004413 RBX: 1ffff11003b2ef8b RCX: ffffc90000805000
RDX: 0000000000040000 RSI: ffffffff81bfaf9d RDI: 0000000000000005
RBP: ffff88801f0ce540 R08: 0000000000000001 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000001 R12: ffff88801d977c98
R13: 00000000ffffffff R14: dead000000000100 R15: ffff88801f0ce540
FS:  00007f3c53a82700(0000) GS:ffff8880e56d8000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3c53a40718 CR3: 000000001fa80000 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: 0033:0x7f3c5650cb19
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:00007f3c53a82188 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 00007f3c5661ff60 RCX: 00007f3c5650cb19
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000008020080
RBP: 00007f3c56566f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe71f7aaaf R14: 00007f3c53a82300 R15: 0000000000022000
 </TASK>
irq event stamp: 3673
hardirqs last  enabled at (3683): [<ffffffff81541b18>] __up_console_sem+0x78/0x80
hardirqs last disabled at (3692): [<ffffffff81541afd>] __up_console_sem+0x5d/0x80
softirqs last  enabled at (3566): [<ffffffff813bafcc>] handle_softirqs+0x50c/0x770
softirqs last disabled at (3559): [<ffffffff813bb364>] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000.