[patch 3/4] MdeModulePkg: Clear the buffer after using it

[Dandan Bi <dandan.bi@intel.com>]

Cc: Liming Gao <liming.gao@intel.com>
Cc: Eric Dong <eric.dong@intel.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Dandan Bi <dandan.bi@intel.com>
---
 MdeModulePkg/Universal/DisplayEngineDxe/ProcessOptions.c | 3 ++-
 MdeModulePkg/Universal/SetupBrowserDxe/Presentation.c    | 1 +
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/MdeModulePkg/Universal/DisplayEngineDxe/ProcessOptions.c b/MdeModulePkg/Universal/DisplayEngineDxe/ProcessOptions.c
index 95bd5f0..557e8ec 100644
--- a/MdeModulePkg/Universal/DisplayEngineDxe/ProcessOptions.c
+++ b/MdeModulePkg/Universal/DisplayEngineDxe/ProcessOptions.c
@@ -905,11 +905,12 @@ PasswordProcess (
       CreateDialog (&Key, gEmptyString, gConfirmError, gPressEnter, gEmptyString, NULL);
     } while (Key.UnicodeChar != CHAR_CARRIAGE_RETURN);
 
     Status = EFI_INVALID_PARAMETER;
   }
-  
+  ZeroMem (TempString, (Maximum + 1) * sizeof (CHAR16));
+  ZeroMem (StringPtr, (Maximum + 1) * sizeof (CHAR16));
   FreePool (TempString);
   FreePool (StringPtr);
 
   return Status;
 }
diff --git a/MdeModulePkg/Universal/SetupBrowserDxe/Presentation.c b/MdeModulePkg/Universal/SetupBrowserDxe/Presentation.c
index 0c5d1b4..aa0bd22 100644
--- a/MdeModulePkg/Universal/SetupBrowserDxe/Presentation.c
+++ b/MdeModulePkg/Universal/SetupBrowserDxe/Presentation.c
@@ -1614,10 +1614,11 @@ ProcessUserInput (
         }
 
         DeleteString(Statement->HiiValue.Value.string, gCurrentSelection->FormSet->HiiHandle);
         Statement->HiiValue.Value.string = UserInput->InputValue.Value.string;
         CopyMem (Statement->BufferValue, UserInput->InputValue.Buffer, (UINTN) UserInput->InputValue.BufferLen);
+        ZeroMem (UserInput->InputValue.Buffer, (UINTN) UserInput->InputValue.BufferLen);
         FreePool (UserInput->InputValue.Buffer);
         //
         // Two password match, send it to Configuration Driver
         //
         if ((Statement->QuestionFlags & EFI_IFR_FLAG_CALLBACK) != 0) {
-- 
1.9.5.msysgit.1