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[FASTFAT] When dealing with attributes on IRP_MJ_CREATE, filter user input to ensure we have only attributes we can handle.

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This applies to files newly created, or for files overwritten where attributes are reset/modified.
This commit is contained in:
Pierre Schweitzer 2018-01-06 22:02:10 +01:00
parent 7bea4ec07e
commit 0eacb0b1ef
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GPG key ID: 7545556C3D585B0B
1 changed files with 8 additions and 4 deletions
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12
drivers/filesystems/fastfat/create.c
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@ -728,7 +728,11 @@ VfatCreateFile(
return Status;
}
Attributes = Stack->Parameters.Create.FileAttributes & ~FILE_ATTRIBUTE_NORMAL;
Attributes = (Stack->Parameters.Create.FileAttributes & (FILE_ATTRIBUTE_ARCHIVE |
FILE_ATTRIBUTE_SYSTEM |
FILE_ATTRIBUTE_HIDDEN |
FILE_ATTRIBUTE_DIRECTORY |
FILE_ATTRIBUTE_READONLY));
/* If the file open failed then create the required file */
if (!NT_SUCCESS (Status))
@ -750,7 +754,7 @@ VfatCreateFile(
}
vfatSplitPathName(&PathNameU, NULL, &FileNameU);
Status = VfatAddEntry(DeviceExt, &FileNameU, &pFcb, ParentFcb, RequestedOptions,
(UCHAR)FlagOn(Attributes, FILE_ATTRIBUTE_VALID_FLAGS), NULL);
Attributes, NULL);
vfatReleaseFCB(DeviceExt, ParentFcb);
if (NT_SUCCESS(Status))
{
@ -921,11 +925,11 @@ VfatCreateFile(
{
if (RequestedDisposition == FILE_SUPERSEDE)
{
*pFcb->Attributes = Attributes & ~FILE_ATTRIBUTE_NORMAL;
*pFcb->Attributes = Attributes;
}
else
{
*pFcb->Attributes |= Attributes & ~FILE_ATTRIBUTE_NORMAL;
*pFcb->Attributes |= Attributes;
}
*pFcb->Attributes |= FILE_ATTRIBUTE_ARCHIVE;
VfatUpdateEntry(pFcb, vfatVolumeIsFatX(DeviceExt));