[tfaber] 72127: [NTOS:MM] - Correctly check for overflow in PeFmtCreateSection CORE-11794

Author: tfaber
Date: Sat Aug  6 09:07:03 2016
New Revision: 72127

URL: http://svn.reactos.org/svn/reactos?rev=72127&view=rev
Log:
[NTOS:MM]
- Correctly check for overflow in PeFmtCreateSection
CORE-11794

Modified:
    trunk/reactos/ntoskrnl/mm/section.c

Modified: trunk/reactos/ntoskrnl/mm/section.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/mm/section.c?rev=7...
==============================================================================
--- trunk/reactos/ntoskrnl/mm/section.c	[iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/mm/section.c	[iso-8859-1] Sat Aug  6 09:07:03 2016
@@ -208,6 +208,7 @@
     SIZE_T nPrevVirtualEndOfSegment = 0;
     ULONG nFileSizeOfHeaders = 0;
     ULONG i;
+    ULONG AlignedLength;

ASSERT(FileHeader);
     ASSERT(FileHeaderSize > 0);
@@ -755,10 +756,11 @@
         else
             pssSegments[i].Length.QuadPart = pishSectionHeaders[i].Misc.VirtualSize;

-        pssSegments[i].Length.LowPart = ALIGN_UP_BY(pssSegments[i].Length.LowPart, nSectionAlignment);
-        /* FIXME: always false */
-        if (pssSegments[i].Length.QuadPart < pssSegments[i].Length.QuadPart)
+        AlignedLength = ALIGN_UP_BY(pssSegments[i].Length.LowPart, nSectionAlignment);
+        if(AlignedLength < pssSegments[i].Length.LowPart)
             DIE(("Cannot align the virtual size of section %u\n", i));
+
+        pssSegments[i].Length.LowPart = AlignedLength;

if(pssSegments[i].Length.QuadPart == 0)
             DIE(("Virtual size of section %u is null\n", i));