[pschweitzer] 62668: [NTOSKRNL] Fix overflow CID #701303

Author: pschweitzer
Date: Sun Apr  6 17:18:55 2014
New Revision: 62668

URL: http://svn.reactos.org/svn/reactos?rev=62668&view=rev
Log:
[NTOSKRNL]
Fix overflow

CID #701303

Modified:
    trunk/reactos/ntoskrnl/fstub/fstubex.c

Modified: trunk/reactos/ntoskrnl/fstub/fstubex.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/fstub/fstubex.c?r…
==============================================================================
--- trunk/reactos/ntoskrnl/fstub/fstubex.c	[iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/fstub/fstubex.c	[iso-8859-1] Sun Apr  6 17:18:55 2014
@@ -2474,7 +2474,7 @@
                     NumberOfEntries = EfiHeader->NumberOfEntries;
                     RtlCopyMemory(&DiskGuid, &EfiHeader->DiskGUID,
sizeof(GUID));
                     /* Count number of sectors needed to store partitions */
-                    SectorsForPartitions = (NumberOfEntries * PARTITION_ENTRY_SIZE) /
Disk->SectorSize;
+                    SectorsForPartitions = ((ULONGLONG)NumberOfEntries *
PARTITION_ENTRY_SIZE) / Disk->SectorSize;
                     /* Set first usable LBA: Legacy MBR + GPT header + Partitions entries
*/
                     FirstUsableLBA = SectorsForPartitions + 2;
                     /* Set last usable LBA: Last sector - GPT header - Partitions entries
*/