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[FASTFAT] On file overwrite, deny it if file as HIDDEN/SYSTEM flag and caller doesn't set them.

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CORE-14158
This commit is contained in:
Pierre Schweitzer 2018-01-01 12:12:08 +01:00
parent c4d6c2c3f1
commit f3fecf92c1
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GPG key ID: 7545556C3D585B0B
1 changed files with 11 additions and 2 deletions
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13
drivers/filesystems/fastfat/create.c
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@ -728,6 +728,8 @@ VfatCreateFile(
return Status; return Status;
} }
Attributes = Stack->Parameters.Create.FileAttributes & ~FILE_ATTRIBUTE_NORMAL;
/* If the file open failed then create the required file */ /* If the file open failed then create the required file */
if (!NT_SUCCESS (Status)) if (!NT_SUCCESS (Status))
{ {
@ -736,7 +738,6 @@ VfatCreateFile(
RequestedDisposition == FILE_OVERWRITE_IF || RequestedDisposition == FILE_OVERWRITE_IF ||
RequestedDisposition == FILE_SUPERSEDE) RequestedDisposition == FILE_SUPERSEDE)
{ {
Attributes = Stack->Parameters.Create.FileAttributes & ~FILE_ATTRIBUTE_NORMAL;
if (!BooleanFlagOn(RequestedOptions, FILE_DIRECTORY_FILE)) if (!BooleanFlagOn(RequestedOptions, FILE_DIRECTORY_FILE))
{ {
if (TrailingBackslash) if (TrailingBackslash)
@ -908,9 +909,17 @@ VfatCreateFile(
RequestedDisposition == FILE_OVERWRITE_IF || RequestedDisposition == FILE_OVERWRITE_IF ||
RequestedDisposition == FILE_SUPERSEDE) RequestedDisposition == FILE_SUPERSEDE)
{ {
if ((BooleanFlagOn(*pFcb->Attributes, FILE_ATTRIBUTE_HIDDEN) && !BooleanFlagOn(Attributes, FILE_ATTRIBUTE_HIDDEN)) ||
(BooleanFlagOn(*pFcb->Attributes, FILE_ATTRIBUTE_SYSTEM) && !BooleanFlagOn(Attributes, FILE_ATTRIBUTE_SYSTEM)))
{
VfatCloseFile(DeviceExt, FileObject);
vfatAddToStat(DeviceExt, Fat.FailedCreates, 1);
return STATUS_ACCESS_DENIED;
}
if (!vfatFCBIsDirectory(pFcb)) if (!vfatFCBIsDirectory(pFcb))
{ {
*pFcb->Attributes = Stack->Parameters.Create.FileAttributes & ~FILE_ATTRIBUTE_NORMAL; *pFcb->Attributes = Attributes & ~FILE_ATTRIBUTE_NORMAL;
*pFcb->Attributes |= FILE_ATTRIBUTE_ARCHIVE; *pFcb->Attributes |= FILE_ATTRIBUTE_ARCHIVE;
VfatUpdateEntry(pFcb, vfatVolumeIsFatX(DeviceExt)); VfatUpdateEntry(pFcb, vfatVolumeIsFatX(DeviceExt));
} }