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Fix an issue in the PCD service to prevent potential out of bound array access

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that can cause an exception. mPeiExMapppingTableSize is the table size, but the 
code needs to check the entry number.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Samer El-Haj-Mahmoud <elhaj@hp.com>
Reviewed-by: Star Zeng <star.zeng@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16448 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Samer El-Haj-Mahmoud 2014-11-26 07:17:31 +00:00 committed by lzeng14
parent 42645c3dcf
commit 8cc87d32c6
1 changed files with 3 additions and 2 deletions

5
MdeModulePkg/Universal/PCD/Dxe/Service.c

@ -1,6 +1,7 @@
/** @file
Help functions used by PCD DXE driver.
Copyright (c) 2014, Hewlett-Packard Development Company, L.P.<BR>
Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
@ -1508,7 +1509,7 @@ GetExPcdTokenNumber (
MatchGuidIdx = MatchGuid - GuidTable;
for (Index = 0; Index < mPeiExMapppingTableSize; Index++) {
for (Index = 0; Index < mPcdDatabase.PeiDb->ExTokenCount; Index++) {
if ((ExTokenNumber == ExMap[Index].ExTokenNumber) &&
(MatchGuidIdx == ExMap[Index].ExGuidIndex)) {
return ExMap[Index].TokenNumber;
@ -1529,7 +1530,7 @@ GetExPcdTokenNumber (
MatchGuidIdx = MatchGuid - GuidTable;
for (Index = 0; Index < mDxeExMapppingTableSize; Index++) {
for (Index = 0; Index < mPcdDatabase.DxeDb->ExTokenCount; Index++) {
if ((ExTokenNumber == ExMap[Index].ExTokenNumber) &&
(MatchGuidIdx == ExMap[Index].ExGuidIndex)) {
return ExMap[Index].TokenNumber;