From: xgu3 <xgu3@6f19259b-4bc3-4df7-8a09-765794883524>
Date: Mon, 11 Dec 2006 02:06:19 +0000 (+0000)
Subject: Fix the bug that could make gMemoryTypeInformation unavailable when gMemoryTypeInform... 
X-Git-Tag: edk2-stable201903~23797
X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=commitdiff_plain;h=4629ca40b7d22356337ba5811e9220f0dd1e14ce

Fix the bug that could make gMemoryTypeInformation unavailable when gMemoryTypeInformation is filled to EfiMaxMemoryType.


git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@2080 6f19259b-4bc3-4df7-8a09-765794883524
---

diff --git a/EdkModulePkg/Core/Dxe/Gcd/gcd.c b/EdkModulePkg/Core/Dxe/Gcd/gcd.c
index 208c05a015..0735bf00b9 100644
--- a/EdkModulePkg/Core/Dxe/Gcd/gcd.c
+++ b/EdkModulePkg/Core/Dxe/Gcd/gcd.c
@@ -2089,7 +2089,7 @@ Returns:
   if (GuidHob != NULL) {
     EfiMemoryTypeInformation = GET_GUID_HOB_DATA (GuidHob);
     DataSize                 = GET_GUID_HOB_DATA_SIZE (GuidHob);
-    if (EfiMemoryTypeInformation != NULL && DataSize > 0 && DataSize < EfiMaxMemoryType * sizeof (EFI_MEMORY_TYPE_INFORMATION)) {
+    if (EfiMemoryTypeInformation != NULL && DataSize > 0 && DataSize <= (EfiMaxMemoryType + 1) * sizeof (EFI_MEMORY_TYPE_INFORMATION)) {
       CopyMem (&gMemoryTypeInformation, EfiMemoryTypeInformation, DataSize);
     }
   }