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Fixed the access to the region list in MmAlterRegion.

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svn path=/trunk/; revision=3922
This commit is contained in:
Hartmut Birr 2003-01-02 16:41:56 +00:00
parent 4af2b6bcb7
commit efc518af7b
1 changed files with 6 additions and 4 deletions
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10
reactos/ntoskrnl/mm/region.c
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@ -16,7 +16,7 @@
* along with this program; if not, write to the Free Software * along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/ */
/* $Id: region.c,v 1.4 2002/09/15 10:45:03 guido Exp $ /* $Id: region.c,v 1.5 2003/01/02 16:41:56 hbirr Exp $
* *
* PROJECT: ReactOS kernel * PROJECT: ReactOS kernel
* FILE: ntoskrnl/mm/region.c * FILE: ntoskrnl/mm/region.c
@ -183,12 +183,11 @@ MmAlterRegion(PMADDRESS_SPACE AddressSpace, PVOID BaseAddress,
* and call the helper function to actually do the changes. * and call the helper function to actually do the changes.
*/ */
CurrentEntry = NewRegion->RegionListEntry.Flink; CurrentEntry = NewRegion->RegionListEntry.Flink;
CurrentRegion = CONTAINING_RECORD(CurrentEntry, MM_REGION,
RegionListEntry);
CurrentBaseAddress = StartAddress + NewRegion->Length; CurrentBaseAddress = StartAddress + NewRegion->Length;
while (RemainingLength > 0 && CurrentRegion->Length <= RemainingLength) while (RemainingLength > 0 && CurrentRegion->Length <= RemainingLength)
{ {
CurrentRegion = CONTAINING_RECORD(CurrentEntry, MM_REGION,
RegionListEntry);
CurrentEntry = CurrentEntry->Flink;
if (CurrentRegion->Type != NewType && if (CurrentRegion->Type != NewType &&
CurrentRegion->Protect != NewProtect) CurrentRegion->Protect != NewProtect)
{ {
@ -199,8 +198,11 @@ MmAlterRegion(PMADDRESS_SPACE AddressSpace, PVOID BaseAddress,
CurrentBaseAddress += CurrentRegion->Length; CurrentBaseAddress += CurrentRegion->Length;
NewRegion->Length += CurrentRegion->Length; NewRegion->Length += CurrentRegion->Length;
RemainingLength -= CurrentRegion->Length; RemainingLength -= CurrentRegion->Length;
CurrentEntry = CurrentEntry->Flink;
RemoveEntryList(&CurrentRegion->RegionListEntry); RemoveEntryList(&CurrentRegion->RegionListEntry);
ExFreePool(CurrentRegion); ExFreePool(CurrentRegion);
CurrentRegion = CONTAINING_RECORD(CurrentEntry, MM_REGION,
RegionListEntry);
} }
/* /*