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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; 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 the file open failed then create the required file */
if (!NT_SUCCESS (Status)) if (!NT_SUCCESS (Status))
@ -750,7 +754,7 @@ VfatCreateFile(
} }
vfatSplitPathName(&PathNameU, NULL, &FileNameU); vfatSplitPathName(&PathNameU, NULL, &FileNameU);
Status = VfatAddEntry(DeviceExt, &FileNameU, &pFcb, ParentFcb, RequestedOptions, Status = VfatAddEntry(DeviceExt, &FileNameU, &pFcb, ParentFcb, RequestedOptions,
(UCHAR)FlagOn(Attributes, FILE_ATTRIBUTE_VALID_FLAGS), NULL); Attributes, NULL);
vfatReleaseFCB(DeviceExt, ParentFcb); vfatReleaseFCB(DeviceExt, ParentFcb);
if (NT_SUCCESS(Status)) if (NT_SUCCESS(Status))
{ {
@ -921,11 +925,11 @@ VfatCreateFile(
{ {
if (RequestedDisposition == FILE_SUPERSEDE) if (RequestedDisposition == FILE_SUPERSEDE)
{ {
*pFcb->Attributes = Attributes & ~FILE_ATTRIBUTE_NORMAL; *pFcb->Attributes = Attributes;
} }
else else
{ {
*pFcb->Attributes |= Attributes & ~FILE_ATTRIBUTE_NORMAL; *pFcb->Attributes |= Attributes;
} }
*pFcb->Attributes |= FILE_ATTRIBUTE_ARCHIVE; *pFcb->Attributes |= FILE_ATTRIBUTE_ARCHIVE;
VfatUpdateEntry(pFcb, vfatVolumeIsFatX(DeviceExt)); VfatUpdateEntry(pFcb, vfatVolumeIsFatX(DeviceExt));