From 17efd446c00b414ddeb53ec00b85d780f2f09250 Mon Sep 17 00:00:00 2001
From: Shenglei Zhang <shenglei.zhang@intel.com>
Date: Tue, 15 Oct 2019 10:13:35 +0800
Subject: [PATCH] MdeModulePkg/Mem: Initialize the variable MapMemory

MapMemory is not initialized by FindGuardedMemoryMap
or CoreInternalAllocatePages which calls MapMemory.
So we give a 0 to it.

Cc: Dandan Bi <dandan.bi@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Signed-off-by: Shenglei Zhang <shenglei.zhang@intel.com>
Reviewed-by: Dandan Bi <dandan.bi@intel.com>
---
 MdeModulePkg/Core/Dxe/Mem/HeapGuard.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/MdeModulePkg/Core/Dxe/Mem/HeapGuard.c b/MdeModulePkg/Core/Dxe/Mem/HeapGuard.c
index 9477b94044..b4cb48843f 100644
--- a/MdeModulePkg/Core/Dxe/Mem/HeapGuard.c
+++ b/MdeModulePkg/Core/Dxe/Mem/HeapGuard.c
@@ -225,6 +225,8 @@ FindGuardedMemoryMap (
   UINTN                   BitsToUnitEnd;
   EFI_STATUS              Status;
 
+  MapMemory = 0;
+
   //
   // Adjust current map table depth according to the address to access
   //