From 1cf2410047f573a81daed28ed425eef54f18bf64 Mon Sep 17 00:00:00 2001
From: Star Zeng <star.zeng@intel.com>
Date: Wed, 13 Dec 2017 11:26:23 +0800
Subject: MdeModulePkg PiSmmCore: Ensure SxDispatch not NULL before
 dereferenced

Cc: Hao Wu <hao.a.wu@intel.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Hao Wu <hao.a.wu@intel.com>
---
 MdeModulePkg/Core/PiSmmCore/PiSmmCore.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'MdeModulePkg')

diff --git a/MdeModulePkg/Core/PiSmmCore/PiSmmCore.c b/MdeModulePkg/Core/PiSmmCore/PiSmmCore.c
index 1ccb9c7787..f136b5d569 100644
--- a/MdeModulePkg/Core/PiSmmCore/PiSmmCore.c
+++ b/MdeModulePkg/Core/PiSmmCore/PiSmmCore.c
@@ -321,7 +321,7 @@ SmmReadyToBootHandler (
              NULL,
              (VOID **)&SxDispatch
              );
-  if (!EFI_ERROR (Status)) {
+  if (!EFI_ERROR (Status) && (SxDispatch != NULL)) {
     //
     // Register a S3 entry callback function to
     // determine if it will be during S3 resume.
-- 
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