ApfelTeeSaft/reactos
1
0
Fork 0
mirror of https://github.com/ApfelTeeSaft/reactos.git synced 2026-08-29 19:26:33 +00:00
Code Issues Packages Projects Releases Wiki Activity

- Fixed list traversing in MmAlterRegion to correctly handle Length that is greater than real memory area size.

Browse Source 
svn path=/trunk/; revision=9663
This commit is contained in:
Filip Navara
2004-06-13 14:05:53 +00:00
parent 1a9133bf9b
commit 3aa5dd5be2
1 changed files with 5 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files
reactos/ntoskrnl/mm/region.c
+5 -3
View File
@@ -16,7 +16,7 @@
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* $Id: region.c,v 1.7 2004/04/10 22:35:25 gdalsnes Exp $
/* $Id: region.c,v 1.8 2004/06/13 14:05:53 navaraf Exp $
*
* PROJECT: ReactOS kernel
* FILE: ntoskrnl/mm/region.c
@@ -160,6 +160,7 @@ MmAlterRegion(PMADDRESS_SPACE AddressSpace, PVOID BaseAddress,
{
RemainingLength = 0;
}
/*
* If necessary then split the region into the affected and unaffected parts.
*/
@@ -186,7 +187,8 @@ MmAlterRegion(PMADDRESS_SPACE AddressSpace, PVOID BaseAddress,
CurrentRegion = CONTAINING_RECORD(CurrentEntry, MM_REGION,
RegionListEntry);
CurrentBaseAddress = (char*)StartAddress + NewRegion->Length;
while (RemainingLength > 0 && CurrentRegion->Length <= RemainingLength)
while (RemainingLength > 0 && CurrentRegion->Length <= RemainingLength &&
CurrentEntry != RegionListHead)
{
if (CurrentRegion->Type != NewType &&
CurrentRegion->Protect != NewProtect)
@@ -217,7 +219,7 @@ MmAlterRegion(PMADDRESS_SPACE AddressSpace, PVOID BaseAddress,
/*
* Split any final region.
*/
if (RemainingLength > 0)
if (RemainingLength > 0 && CurrentEntry != RegionListHead)
{
CurrentRegion = CONTAINING_RECORD(CurrentEntry, MM_REGION,
RegionListEntry);