From 39669f1281f56c399a48af1b976696f9d86e1089 Mon Sep 17 00:00:00 2001
From: hhuan13 <hhuan13@6f19259b-4bc3-4df7-8a09-765794883524>
Date: Wed, 2 Jun 2010 07:55:14 +0000
Subject: [PATCH] Fixed tracker #203752, Dhcp4 assert issue.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10562 6f19259b-4bc3-4df7-8a09-765794883524
---
 MdeModulePkg/Universal/Network/Dhcp4Dxe/Dhcp4Io.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/MdeModulePkg/Universal/Network/Dhcp4Dxe/Dhcp4Io.c b/MdeModulePkg/Universal/Network/Dhcp4Dxe/Dhcp4Io.c
index 6030a824aa..ba7082e985 100644
--- a/MdeModulePkg/Universal/Network/Dhcp4Dxe/Dhcp4Io.c
+++ b/MdeModulePkg/Universal/Network/Dhcp4Dxe/Dhcp4Io.c
@@ -1516,8 +1516,10 @@ DhcpOnTimerTick (
       Status = DhcpChooseOffer (DhcpSb);
 
       if (EFI_ERROR(Status)) {
-        FreePool (DhcpSb->LastOffer);
-        DhcpSb->LastOffer = NULL;
+        if (DhcpSb->LastOffer != NULL) {
+          FreePool (DhcpSb->LastOffer);
+          DhcpSb->LastOffer = NULL;
+        }
       } else {
         goto ON_EXIT;
       }
-- 
2.39.5