[syzbot] [hfs?] WARNING in hfs_mdb_commit

[syzbot] [hfs?] WARNING in hfs_mdb_commit

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit:    1bfaee9d3351 Merge tag 'fsverity-for-linus' of git://git.k..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=12f08726580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=7f195f6be48c12ec
dashboard link: https://syzkaller.appspot.com/bug?extid=c149ad75e9633be0c1ad
compiler:       Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-1bfaee9d.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/879fc4fe312e/vmlinux-1bfaee9d.xz
kernel image: https://storage.googleapis.com/syzbot-assets/9e35bd667fed/bzImage-1bfaee9d.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+c149ad75e9633be0c1ad@syzkaller.appspotmail.com

loop0: detected capacity change from 0 to 64
loop0: detected capacity change from 64 to 0
Buffer I/O error on dev loop0, logical block 62, lost sync page write
hfs: unable to read volume bitmap
------------[ cut here ]------------
!buffer_uptodate(bh)
WARNING: fs/buffer.c:1087 at mark_buffer_dirty+0x299/0x410 fs/buffer.c:1087, CPU#0: syz.0.0/5321
Modules linked in:
CPU: 0 UID: 0 PID: 5321 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:mark_buffer_dirty+0x299/0x410 fs/buffer.c:1087
Code: 4c 89 f7 e8 b9 5c da ff 49 8b 3e be 40 00 00 00 5b 41 5c 41 5e 41 5f 5d e9 b4 63 fb ff e8 3f 91 6d ff eb 8c e8 38 91 6d ff 90 <0f> 0b 90 e9 a5 fd ff ff e8 2a 91 6d ff 90 0f 0b 90 e9 cf fd ff ff
RSP: 0018:ffffc9000ddafba8 EFLAGS: 00010283
RAX: ffffffff82584008 RBX: ffff888046e26658 RCX: 0000000000100000
RDX: ffffc9000eefa000 RSI: 0000000000001912 RDI: 0000000000001913
RBP: 1ffff11007a3ec01 R08: ffff888046e2665f R09: 1ffff11008dc4ccb
R10: dffffc0000000000 R11: ffffed1008dc4ccc R12: dffffc0000000000
R13: ffff88803d1f6628 R14: ffff888055813c0b R15: ffff888055831492
FS:  00007f2c9e9b96c0(0000) GS:ffff88808c881000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000210 CR3: 00000000133b8000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 hfs_mdb_commit+0x84b/0x1150 fs/hfs/mdb.c:328
 hfs_sync_fs+0x1d/0x30 fs/hfs/super.c:38
 sync_filesystem+0x1cf/0x230 fs/sync.c:66
 hfs_reconfigure+0x66/0x270 fs/hfs/super.c:122
 reconfigure_super+0x227/0x8a0 fs/super.c:1080
 do_remount fs/namespace.c:3400 [inline]
 path_mount+0xdc5/0x10e0 fs/namespace.c:4146
 do_mount fs/namespace.c:4167 [inline]
 __do_sys_mount fs/namespace.c:4383 [inline]
 __se_sys_mount+0x31d/0x420 fs/namespace.c:4360
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2c9db9cdd9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2c9e9b8fe8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f2c9de15fa0 RCX: 00007f2c9db9cdd9
RDX: 0000000000000000 RSI: 00002000000002c0 RDI: 0000000000000000
RBP: 00007f2c9dc32d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000c22 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2c9de16038 R14: 00007f2c9de15fa0 R15: 00007fffa4666ff8
 </TASK>


---
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