syz.0.17: attempt to access beyond end of device
loop0: rw=8912896, sector=102, nr_sectors = 1 limit=63
syz.0.17: attempt to access beyond end of device
loop0: rw=8912896, sector=103, nr_sectors = 1 limit=63
syz.0.17: attempt to access beyond end of device
loop0: rw=8390657, sector=98, nr_sectors = 1 limit=63
Buffer I/O error on dev loop0, logical block 98, lost sync page write
------------[ cut here ]------------
!buffer_uptodate(bh)
WARNING: fs/buffer.c:991 at mark_buffer_dirty+0x299/0x410 fs/buffer.c:991, CPU#1: syz.0.17/6048
Modules linked in:
CPU: 1 UID: 0 PID: 6048 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2026
RIP: 0010:mark_buffer_dirty+0x299/0x410 fs/buffer.c:991
Code: 4c 89 f7 e8 a9 01 d8 ff 49 8b 3e be 40 00 00 00 5b 41 5c 41 5e 41 5f 5d e9 74 52 fb ff e8 7f 01 68 ff eb 8c e8 78 01 68 ff 90 <0f> 0b 90 e9 a5 fd ff ff e8 6a 01 68 ff 90 0f 0b 90 e9 cf fd ff ff
RSP: 0018:ffffc90003a8f858 EFLAGS: 00010293
RAX: ffffffff825fc938 RBX: ffff88806f888c40 RCX: ffff8880256b1f40
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002
RBP: dffffc0000000001 R08: ffff88806f888c47 R09: 1ffff1100df11188
R10: dffffc0000000000 R11: ffffed100df11189 R12: ffff888066eed434
R13: 0000000000000000 R14: ffff888053093a60 R15: ffff88806fab1428
FS:  00007f7b5fba76c0(0000) GS:ffff888124dd2000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4219754000 CR3: 000000007eb3d000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 mmb_mark_buffer_dirty+0x2c/0x1f0 fs/buffer.c:624
 vfat_update_dotdot_de+0x90/0x1c0 fs/fat/namei_vfat.c:917
 vfat_rename_exchange fs/fat/namei_vfat.c:1140 [inline]
 vfat_rename2+0xe3e/0x1c90 fs/fat/namei_vfat.c:1171
 vfs_rename+0xbd9/0xef0 fs/namei.c:6208
 filename_renameat2+0x533/0x9a0 fs/namei.c:6326
 __do_sys_renameat2 fs/namei.c:6355 [inline]
 __se_sys_renameat2+0x5a/0x2c0 fs/namei.c:6350
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7b5ed9e159
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:00007f7b5fba7028 EFLAGS: 00000246 ORIG_RAX: 000000000000013c
RAX: ffffffffffffffda RBX: 00007f7b5f026090 RCX: 00007f7b5ed9e159
RDX: ffffffffffffff9c RSI: 0000200000000480 RDI: ffffffffffffff9c
RBP: 00007f7b5ee3503b R08: 0000000000000002 R09: 0000000000000000
R10: 00002000000004c0 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7b5f026128 R14: 00007f7b5f026090 R15: 00007ffd87042948
 </TASK>