From f0a3b1a221ad8a678de18fb8ad9e2a6ba8112093 Mon Sep 17 00:00:00 2001
From: klu2 <klu2@6f19259b-4bc3-4df7-8a09-765794883524>
Date: Tue, 23 Jun 2009 08:42:38 +0000
Subject: [PATCH] Add more checking to avoid the buffer overflow.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@8626 6f19259b-4bc3-4df7-8a09-765794883524
---
 IntelFrameworkModulePkg/Library/GenericBdsLib/BdsConsole.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/IntelFrameworkModulePkg/Library/GenericBdsLib/BdsConsole.c b/IntelFrameworkModulePkg/Library/GenericBdsLib/BdsConsole.c
index bc8de582f6..0eadec9fe7 100644
--- a/IntelFrameworkModulePkg/Library/GenericBdsLib/BdsConsole.c
+++ b/IntelFrameworkModulePkg/Library/GenericBdsLib/BdsConsole.c
@@ -41,6 +41,10 @@ IsNvNeed (
     Ptr++;
   }
 
+  if ((((UINTN)Ptr - (UINTN)ConVarName) / sizeof (CHAR16)) <= 3) {
+    return TRUE;
+  }
+  
   if ((*(Ptr - 3) == 'D') && (*(Ptr - 2) == 'e') && (*(Ptr - 1) == 'v')) {
     return FALSE;
   } else {