From b954a4fe01f3477d28eaf575dd36a9015e315aca Mon Sep 17 00:00:00 2001
From: Dandan Bi <dandan.bi@intel.com>
Date: Wed, 6 Jan 2016 00:57:23 +0000
Subject: [PATCH] MdeModulePkg:Fix the potential memory leak issue in Display
 Engine

The MenuOption insert to gMenuOption allocate memory everytime,but not free.
Now add the code to free it.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Dandan Bi <dandan.bi@intel.com>
Reviewed-by: Eric Dong <eric.dong@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@19593 6f19259b-4bc3-4df7-8a09-765794883524
---
 .../Universal/DisplayEngineDxe/FormDisplay.c  | 34 +++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/MdeModulePkg/Universal/DisplayEngineDxe/FormDisplay.c b/MdeModulePkg/Universal/DisplayEngineDxe/FormDisplay.c
index a391442d16..66f7dffc53 100644
--- a/MdeModulePkg/Universal/DisplayEngineDxe/FormDisplay.c
+++ b/MdeModulePkg/Universal/DisplayEngineDxe/FormDisplay.c
@@ -3729,6 +3729,35 @@ UiDisplayMenu (
   }
 }
 
+/**
+  Free the UI Menu Option structure data.
+
+  @param   MenuOptionList         Point to the menu option list which need to be free.
+
+**/
+
+VOID
+FreeMenuOptionData(
+  LIST_ENTRY           *MenuOptionList
+  )
+{
+  LIST_ENTRY           *Link;
+  UI_MENU_OPTION       *Option;
+
+  //
+  // Free menu option list
+  //
+  while (!IsListEmpty (MenuOptionList)) {
+    Link = GetFirstNode (MenuOptionList);
+    Option = MENU_OPTION_FROM_LINK (Link);
+    if (Option->Description != NULL){
+      FreePool(Option->Description);
+    }
+    RemoveEntryList (&Option->Link);
+    FreePool (Option);
+  }
+}
+
 /**
 
   Base on the browser status info to show an pop up message.
@@ -4001,6 +4030,11 @@ FormDisplay (
   CopyGuid (&gOldFormEntry.FormSetGuid, &FormData->FormSetGuid);
   gOldFormEntry.FormId    = FormData->FormId;
 
+  //
+  //Free the Ui menu option list.
+  //
+  FreeMenuOptionData(&gMenuOption);
+
   return Status;
 }