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[NTOSKRNL] Stub page file extension support

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This commit is contained in:
Pierre Schweitzer 2018-08-16 11:58:58 +02:00
parent 11b7619a71
commit 5bd938bd24
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GPG key ID: 7545556C3D585B0B
1 changed files with 64 additions and 0 deletions
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64
ntoskrnl/mm/pagefile.c
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@ -571,9 +571,12 @@ NtCreatePagingFile(IN PUNICODE_STRING FileName,
/* If we failed, relax a bit constraints, someone may be already holding the
* the file, so share write, don't attempt to replace and don't delete on close
* (basically, don't do anything conflicting)
* This can happen if the caller attempts to extend a page file.
*/
if (!NT_SUCCESS(Status))
{
ULONG i;
Status = IoCreateFile(&FileHandle,
SYNCHRONIZE | FILE_WRITE_DATA,
&ObjectAttributes,
@ -588,6 +591,67 @@ NtCreatePagingFile(IN PUNICODE_STRING FileName,
CreateFileTypeNone,
NULL,
SL_OPEN_PAGING_FILE | IO_NO_PARAMETER_CHECKING);
if (!NT_SUCCESS(Status))
{
ExFreePoolWithTag(Dacl, 'lcaD');
ExFreePoolWithTag(Buffer, TAG_MM);
return Status;
}
/* We opened it! Check we are that "someone" ;-)
* First, get the opened file object.
*/
Status = ObReferenceObjectByHandle(FileHandle,
FILE_READ_DATA | FILE_WRITE_DATA,
IoFileObjectType,
KernelMode,
(PVOID*)&FileObject,
NULL);
if (!NT_SUCCESS(Status))
{
ZwClose(FileHandle);
ExFreePoolWithTag(Dacl, 'lcaD');
ExFreePoolWithTag(Buffer, TAG_MM);
return Status;
}
/* Find if it matches a previous page file */
PagingFile = NULL;
if (MmNumberOfPagingFiles > 0)
{
i = 0;
while (MmPagingFile[i]->FileObject->SectionObjectPointer != FileObject->SectionObjectPointer)
{
++i;
if (i >= MmNumberOfPagingFiles)
{
break;
}
}
/* This is the matching page file */
PagingFile = MmPagingFile[i];
}
/* If we didn't find the page file, fail */
if (PagingFile == NULL)
{
ObDereferenceObject(FileObject);
ZwClose(FileHandle);
ExFreePoolWithTag(Dacl, 'lcaD');
ExFreePoolWithTag(Buffer, TAG_MM);
return STATUS_NOT_FOUND;
}
/* FIXME: implement parameters checking and page file extension */
UNIMPLEMENTED;
ObDereferenceObject(FileObject);
ZwClose(FileHandle);
ExFreePoolWithTag(Dacl, 'lcaD');
ExFreePoolWithTag(Buffer, TAG_MM);
return STATUS_NOT_IMPLEMENTED;
}
if (!NT_SUCCESS(Status))