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[NTOSKRNL]

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Fix a serious bug, where NtAllocateVirtualMemory could allocate memory user mode memory above MmHighestUserAddress up to MmSystemRangeStart - 1, which is a no-access area.

svn path=/trunk/; revision=50917
This commit is contained in:
Timo Kreuzer
2011-02-27 15:16:00 +00:00
parent d3b52209a4
commit 3a61fab955
1 changed files with 1 additions and 1 deletions
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reactos/ntoskrnl/mm/marea.c
+1 -1
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@@ -458,7 +458,7 @@ MmFindGapBottomUp(
{
PVOID LowestAddress = MmGetAddressSpaceOwner(AddressSpace) ? MM_LOWEST_USER_ADDRESS : MmSystemRangeStart;
PVOID HighestAddress = MmGetAddressSpaceOwner(AddressSpace) ?
(PVOID)((ULONG_PTR)MmSystemRangeStart - 1) : (PVOID)MAXULONG_PTR;
MmHighestUserAddress : (PVOID)MAXULONG_PTR;
PVOID AlignedAddress;
PMEMORY_AREA Node;
PMEMORY_AREA FirstNode;