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[NTOSKRNL] Page files don't have an init size, but a minimum size

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NFC
This commit is contained in:
Pierre Schweitzer 2018-08-16 12:42:34 +02:00
parent 315867d4ff
commit bfc6a7957c
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GPG key ID: 7545556C3D585B0B
1 changed files with 13 additions and 13 deletions
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26
ntoskrnl/mm/pagefile.c
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@ -345,7 +345,7 @@ MmAllocSwapPage(VOID)
NTSTATUS NTAPI
NtCreatePagingFile(IN PUNICODE_STRING FileName,
IN PLARGE_INTEGER InitialSize,
IN PLARGE_INTEGER MinimumSize,
IN PLARGE_INTEGER MaximumSize,
IN ULONG Reserved)
{
@ -359,14 +359,14 @@ NtCreatePagingFile(IN PUNICODE_STRING FileName,
ULONG Count;
KPROCESSOR_MODE PreviousMode;
UNICODE_STRING PageFileName;
LARGE_INTEGER SafeInitialSize, SafeMaximumSize, AllocationSize;
LARGE_INTEGER SafeMinimumSize, SafeMaximumSize, AllocationSize;
FILE_FS_DEVICE_INFORMATION FsDeviceInfo;
SECURITY_DESCRIPTOR SecurityDescriptor;
PACL Dacl;
PWSTR Buffer;
DPRINT("NtCreatePagingFile(FileName %wZ, InitialSize %I64d)\n",
FileName, InitialSize->QuadPart);
DPRINT("NtCreatePagingFile(FileName %wZ, MinimumSize %I64d)\n",
FileName, MinimumSize->QuadPart);
PAGED_CODE();
@ -386,7 +386,7 @@ NtCreatePagingFile(IN PUNICODE_STRING FileName,
_SEH2_TRY
{
SafeInitialSize = ProbeForReadLargeInteger(InitialSize);
SafeMinimumSize = ProbeForReadLargeInteger(MinimumSize);
SafeMaximumSize = ProbeForReadLargeInteger(MaximumSize);
PageFileName.Length = FileName->Length;
@ -402,7 +402,7 @@ NtCreatePagingFile(IN PUNICODE_STRING FileName,
}
else
{
SafeInitialSize = *InitialSize;
SafeMinimumSize = *MinimumSize;
SafeMaximumSize = *MaximumSize;
PageFileName.Length = FileName->Length;
@ -412,7 +412,7 @@ NtCreatePagingFile(IN PUNICODE_STRING FileName,
/* Pagefiles can't be larger than 4GB and ofcourse the minimum should be
smaller than the maximum */
if (0 != SafeInitialSize.u.HighPart)
if (0 != SafeMinimumSize.u.HighPart)
{
return STATUS_INVALID_PARAMETER_2;
}
@ -420,7 +420,7 @@ NtCreatePagingFile(IN PUNICODE_STRING FileName,
{
return STATUS_INVALID_PARAMETER_3;
}
if (SafeMaximumSize.u.LowPart < SafeInitialSize.u.LowPart)
if (SafeMaximumSize.u.LowPart < SafeMinimumSize.u.LowPart)
{
return STATUS_INVALID_PARAMETER_MIX;
}
@ -535,7 +535,7 @@ NtCreatePagingFile(IN PUNICODE_STRING FileName,
* of the paging file is cluster 3042 but cluster 3043 is NOT part of the
* paging file but of another file. We can't write a complete page (4096
* bytes) to the physical location of cluster 3042 then. */
AllocationSize.QuadPart = SafeInitialSize.QuadPart + PAGE_SIZE;
AllocationSize.QuadPart = SafeMinimumSize.QuadPart + PAGE_SIZE;
/* First, attempt to replace the page file, if existing */
Status = IoCreateFile(&FileHandle,
@ -669,10 +669,10 @@ NtCreatePagingFile(IN PUNICODE_STRING FileName,
/* DACL is no longer needed, free it */
ExFreePoolWithTag(Dacl, 'lcaD');
/* Set its end of file to initial size */
/* Set its end of file to minimal size */
Status = ZwSetInformationFile(FileHandle,
&IoStatus,
&SafeInitialSize,
&SafeMinimumSize,
sizeof(LARGE_INTEGER),
FileEndOfFileInformation);
if (!NT_SUCCESS(Status) || !NT_SUCCESS(IoStatus.Status))
@ -720,8 +720,8 @@ NtCreatePagingFile(IN PUNICODE_STRING FileName,
PagingFile->FileHandle = FileHandle;
PagingFile->FileObject = FileObject;
PagingFile->MaximumSize.QuadPart = SafeMaximumSize.QuadPart;
PagingFile->CurrentSize.QuadPart = SafeInitialSize.QuadPart;
PagingFile->FreePages = (ULONG)(SafeInitialSize.QuadPart / PAGE_SIZE);
PagingFile->CurrentSize.QuadPart = SafeMinimumSize.QuadPart;
PagingFile->FreePages = (ULONG)(SafeMinimumSize.QuadPart / PAGE_SIZE);
PagingFile->UsedPages = 0;
PagingFile->PageFileName = PageFileName;