MdeModulePkg: Fix IPv4 double free

[mirror_edk2.git] / MdeModulePkg / Universal / Network / Ip4Dxe / Ip4Config2Impl.c

diff --git a/MdeModulePkg/Universal/Network/Ip4Dxe/Ip4Config2Impl.c b/MdeModulePkg/Universal/Network/Ip4Dxe/Ip4Config2Impl.c
index 1f763b6bfe0df8a62f91ffd7bcac2c376a552a76..17e0247832200cbf3fe7504ab762544cff18b5d4 100644 (file)
--- a/MdeModulePkg/Universal/Network/Ip4Dxe/Ip4Config2Impl.c
+++ b/MdeModulePkg/Universal/Network/Ip4Dxe/Ip4Config2Impl.c
@@ -2,7 +2,7 @@
   The implementation of EFI IPv4 Configuration II Protocol.\r
 \r
   Copyright (c) 2015 - 2016, Intel Corporation. All rights reserved.<BR>\r
-  (C) Copyright 2015 Hewlett Packard Enterprise Development LP<BR>\r
+  (C) Copyright 2015-2016 Hewlett Packard Enterprise Development LP<BR>\r
 \r
   This program and the accompanying materials\r
   are licensed and made available under the terms and conditions of the BSD License\r
@@ -1194,6 +1194,7 @@ Ip4Config2SetPolicy (
       //\r
       if (Instance->Dhcp4Event != NULL) {\r
         gBS->CloseEvent (Instance->Dhcp4Event);\r
+        Instance->Dhcp4Event = NULL;\r
       }\r
     }\r
   }\r
@@ -1997,6 +1998,7 @@ Ip4Config2CleanInstance (
   //\r
   if (Instance->Dhcp4Event != NULL) {\r
     gBS->CloseEvent (Instance->Dhcp4Event);\r
+    Instance->Dhcp4Event = NULL;\r
   }\r
 \r
   for (Index = 0; Index < Ip4Config2DataTypeMaximum; Index++) {\r