From a89b923ea90ed178f74df42ae344cc0a3b24380b Mon Sep 17 00:00:00 2001
From: Star Zeng <star.zeng@intel.com>
Date: Mon, 20 Nov 2017 15:30:22 +0800
Subject: [PATCH] MdeModulePkg EhciPei: Also check Buf against NULL to return
 error

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/Bus/Pci/EhciPei/EhciSched.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/MdeModulePkg/Bus/Pci/EhciPei/EhciSched.c b/MdeModulePkg/Bus/Pci/EhciPei/EhciSched.c
index 606a53db1d..6b19362699 100644
--- a/MdeModulePkg/Bus/Pci/EhciPei/EhciSched.c
+++ b/MdeModulePkg/Bus/Pci/EhciPei/EhciSched.c
@@ -134,7 +134,7 @@ EhcInitSched (
              &Map
              );
 
-  if (EFI_ERROR (Status)) {
+  if (EFI_ERROR (Status) || (Buf == NULL)) {
     return EFI_OUT_OF_RESOURCES;
   }