loop2: detected capacity change from 0 to 2048
EXT4-fs (loop2): VFS: Can't find ext4 filesystem
EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000.
------------[ cut here ]------------
WARNING: fs/ext4/super.c:1322 at ext4_put_super+0xbe7/0xf30, CPU#1: syz-executor.0/287
Modules linked in:
CPU: 1 UID: 0 PID: 287 Comm: syz-executor.0 Tainted: G        W           6.17.0-rc3-next-20250829 #1 PREEMPT(voluntary) 
Tainted: [W]=WARN
loop2: detected capacity change from 0 to 2048
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:ext4_put_super+0xbe7/0xf30
Code: 7c ff 48 8d bd 00 02 00 00 e8 75 aa 66 00 31 ff 49 89 c4 48 89 c6 e8 08 c9 7c ff 4d 85 e4 0f 84 ff f9 ff ff e8 9a cd 7c ff 90 <0f> 0b 90 e9 f1 f9 ff ff e8 8c cd 7c ff 4c 89 ef e8 b4 09 4b ff c7
RSP: 0018:ffff88801c437d08 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff8880181d6000 RCX: ffffffff81f719d8
RDX: ffff8880173fd280 RSI: ffffffff81f719e6 RDI: 0000000000000007
RBP: ffff888013ebe000 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000002 R11: 0000000000000001 R12: 0000000000000002
EXT4-fs (loop2): VFS: Can't find ext4 filesystem
R13: 0000000000000001 R14: ffff8880181d6618 R15: 0000000000000000
FS:  000055556073a400(0000) GS:ffff8880e56dd000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d426000 CR3: 0000000046d4d000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 generic_shutdown_super+0x15a/0x4a0
 kill_block_super+0x3b/0x90
 ext4_kill_sb+0x6c/0xb0
 deactivate_locked_super+0xbf/0x1a0
 deactivate_super+0xb1/0xd0
 cleanup_mnt+0x2df/0x430
 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: 0033:0x7f1d74682f87
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:00007ffc8186f308 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 000000000000002c RCX: 00007f1d74682f87
RDX: 00007ffc8186f3da RSI: 000000000000000a RDI: 00007ffc8186f3d0
RBP: 00007ffc8186f3d0 R08: 00000000ffffffff R09: 00007ffc8186f1a0
R10: 000055556073bc7b R11: 0000000000000246 R12: 00007f1d746db105
R13: 00007ffc81870490 R14: 000055556073bc20 R15: 00007ffc818704d0
 </TASK>
irq event stamp: 210683
hardirqs last  enabled at (210693): [<ffffffff81541b18>] __up_console_sem+0x78/0x80
hardirqs last disabled at (210702): [<ffffffff81541afd>] __up_console_sem+0x5d/0x80
softirqs last  enabled at (210662): [<ffffffff813bafcc>] handle_softirqs+0x50c/0x770
softirqs last disabled at (210657): [<ffffffff813bb364>] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---