Re: [PATCH 3/6] fs/ntfs3: Sequential field availability check in mi_enum_attr()

[lei lu]

Hi, Konstantin,

Refer to: https://lore.kernel.org/ntfs3/20240820105342.79788-1-llfamsec@xxxxxxxxx/T/#t.

In https://github.com/Paragon-Software-Group/linux-ntfs3/blob/master/fs/ntfs3/record.c#L267.
The code did not check the 'non_res' field. If asize is just 8 bytes, it still trigger OOB.
So I added "if (asize < SIZEOF_RESIDENT)" before accessing the 'non_res'. Because
SIZEOF_RESIDENT is smaller than SIZEOF_NONRESIDENT which seems to be the minimum size of
attr. Or maybe we can use "if (off + 9 > used)" directly.

Thanks,
LL