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[FASTFAT] Calculate more accurately buffer length in VfatGetAllInformation().

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This commit is contained in:
Pierre Schweitzer
2017-12-09 10:59:37 +01:00
parent 52f0726817
commit e95751ab78
1 changed files with 2 additions and 6 deletions
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8
drivers/filesystems/fastfat/finfo.c
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@@ -1188,6 +1188,8 @@ VfatGetAllInformation(
if (*BufferLength < FIELD_OFFSET(FILE_ALL_INFORMATION, NameInformation.FileName))
return STATUS_BUFFER_OVERFLOW;
*BufferLength -= (sizeof(FILE_ACCESS_INFORMATION) + sizeof(FILE_MODE_INFORMATION) + sizeof(FILE_ALIGNMENT_INFORMATION));
/* Basic Information */
Status = VfatGetBasicInformation(FileObject, Fcb, DeviceExt, &Info->BasicInformation, BufferLength);
if (!NT_SUCCESS(Status)) return Status;
@@ -1200,15 +1202,9 @@ VfatGetAllInformation(
/* EA Information */
Status = VfatGetEaInformation(FileObject, Fcb, DeviceExt, &Info->EaInformation, BufferLength);
if (!NT_SUCCESS(Status)) return Status;
/* Access Information: The IO-Manager adds this information */
*BufferLength -= sizeof(FILE_ACCESS_INFORMATION);
/* Position Information */
Status = VfatGetPositionInformation(FileObject, Fcb, DeviceExt, &Info->PositionInformation, BufferLength);
if (!NT_SUCCESS(Status)) return Status;
/* Mode Information: The IO-Manager adds this information */
*BufferLength -= sizeof(FILE_MODE_INFORMATION);
/* Alignment Information: The IO-Manager adds this information */
*BufferLength -= sizeof(FILE_ALIGNMENT_INFORMATION);
/* Name Information */
Status = VfatGetNameInformation(FileObject, Fcb, DeviceExt, &Info->NameInformation, BufferLength);