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[NTOS] Fix a bug in the PE loader, which caused images to be loaded up to MmHighestUserAddress, thus overwriting the shared user page.

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This is now fixed by using MM_HIGHEST_VAD_ADDRESS as the margin instead.
Should fix CORE-11717
This commit is contained in:
Timo Kreuzer 2019-10-21 00:36:14 +02:00
parent 3f1265f8c1
commit 56da95671c
1 changed files with 2 additions and 2 deletions
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4
ntoskrnl/mm/section.c
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@ -4579,11 +4579,11 @@ MmMapViewOfSection(IN PVOID SectionObject,
ImageSectionObject->ImageInformation.ImageFileSize = (ULONG)ImageSize;
/* Check for an illegal base address */
if (((ImageBase + ImageSize) > (ULONG_PTR)MmHighestUserAddress) ||
if (((ImageBase + ImageSize) > (ULONG_PTR)MM_HIGHEST_VAD_ADDRESS) ||
((ImageBase + ImageSize) < ImageSize))
{
ASSERT(*BaseAddress == NULL);
ImageBase = ALIGN_DOWN_BY((ULONG_PTR)MmHighestUserAddress - ImageSize,
ImageBase = ALIGN_DOWN_BY((ULONG_PTR)MM_HIGHEST_VAD_ADDRESS - ImageSize,
MM_VIRTMEM_GRANULARITY);
NotAtBase = TRUE;
}