From 08aa37e0157271b87e917c598260644920c4ed57 Mon Sep 17 00:00:00 2001
From: lgao4 <lgao4@6f19259b-4bc3-4df7-8a09-765794883524>
Date: Wed, 14 Mar 2007 07:42:20 +0000
Subject: Add check whether input parameter is NULL before call freepool API
 defined in MDE.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@2461 6f19259b-4bc3-4df7-8a09-765794883524
---
 .../Universal/Console/ConSplitter/Dxe/ConSplitterGraphics.c    | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

(limited to 'EdkModulePkg/Universal/Console/ConSplitter/Dxe/ConSplitterGraphics.c')

diff --git a/EdkModulePkg/Universal/Console/ConSplitter/Dxe/ConSplitterGraphics.c b/EdkModulePkg/Universal/Console/ConSplitter/Dxe/ConSplitterGraphics.c
index 9faeb56d12..2f60e11c40 100644
--- a/EdkModulePkg/Universal/Console/ConSplitter/Dxe/ConSplitterGraphics.c
+++ b/EdkModulePkg/Universal/Console/ConSplitter/Dxe/ConSplitterGraphics.c
@@ -1314,8 +1314,10 @@ DevNullTextOutSetMode (
     Private->TextOutMode.Mode = (INT32) ModeNumber;
     Private->DevNullColumns   = Column;
     Private->DevNullRows      = Row;
-
-    FreePool (Private->DevNullScreen);
+    
+    if (Private->DevNullScreen != NULL) {
+      FreePool (Private->DevNullScreen);
+    }
 
     Size                    = (Row * (Column + 1)) * sizeof (CHAR16);
     Private->DevNullScreen  = AllocateZeroPool (Size);
@@ -1323,7 +1325,9 @@ DevNullTextOutSetMode (
       return EFI_OUT_OF_RESOURCES;
     }
 
-    FreePool (Private->DevNullAttributes);
+    if (Private->DevNullAttributes != NULL) {
+      FreePool (Private->DevNullAttributes);
+    }
 
     Size                        = Row * Column * sizeof (INT32);
     Private->DevNullAttributes  = AllocateZeroPool (Size);
-- 
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