------------[ cut here ]------------
WARNING: CPU: 0 PID: 4664 at fs/buffer.c:1081 mark_buffer_dirty+0x383/0x7a0 fs/buffer.c:1081
Modules linked in:
CPU: 0 PID: 4664 Comm: syz.0.54 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:mark_buffer_dirty+0x383/0x7a0 fs/buffer.c:1081
Code: 13 d1 e2 ff 49 8b 3f be 04 00 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d e9 bc bc fc ff e8 a7 9f 92 ff e9 43 ff ff ff e8 9d 9f 92 ff <0f> 0b e9 ba fc ff ff e8 91 9f 92 ff 0f 0b e9 00 fd ff ff e8 85 9f
RSP: 0018:ffffc90003497d70 EFLAGS: 00010287
RAX: ffffffff81ee4033 RBX: ffff888071256910 RCX: 0000000000080000
RDX: ffffc9000c919000 RSI: 000000000000a908 RDI: 000000000000a909
RBP: 1ffff1100ed8f801 R08: dffffc0000000000 R09: ffffed100e24ad23
R10: ffffed100e24ad23 R11: 1ffff1100e24ad22 R12: dffffc0000000000
R13: ffff888076c7c678 R14: ffff88804e47345b R15: ffff88804e473400
FS:  00007f695a5ba6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f68e0589000 CR3: 0000000028f4a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 hfs_mdb_commit+0x47e/0x1110 fs/hfs/mdb.c:283
 hfs_sync_fs+0x11/0x20 fs/hfs/super.c:35
 iterate_supers+0x11e/0x1d0 fs/super.c:757
 ksys_sync+0xa0/0x150 fs/sync.c:103
 __ia32_sys_sync+0xa/0x10 fs/sync.c:113
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f695978f749
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f695a5ba038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007f69599e5fa0 RCX: 00007f695978f749
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f69599e5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f69599e6038 R14: 00007f69599e5fa0 R15: 00007ffd5b93abc8
 </TASK>