From 3d2367a2a748e87220a8aa5aa006448759d11be1 Mon Sep 17 00:00:00 2001
From: sfu5 <sfu5@6f19259b-4bc3-4df7-8a09-765794883524>
Date: Tue, 14 May 2013 03:01:51 +0000
Subject: [PATCH] Fix bug in PXE driver: memory may be freed before use.
 Signed-off-by: Fu Siyuan <siyuan.fu@intel.com> Reviewed-by: Ye Ting
 <ting.ye@intel.com> Reviewed-by: Ouyang Qian <qian.ouyang@intel.com>

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@14354 6f19259b-4bc3-4df7-8a09-765794883524
---
 NetworkPkg/UefiPxeBcDxe/PxeBcDriver.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/NetworkPkg/UefiPxeBcDxe/PxeBcDriver.c b/NetworkPkg/UefiPxeBcDxe/PxeBcDriver.c
index 0b2743d127..8ee831f521 100644
--- a/NetworkPkg/UefiPxeBcDxe/PxeBcDriver.c
+++ b/NetworkPkg/UefiPxeBcDxe/PxeBcDriver.c
@@ -1353,9 +1353,6 @@ ON_ERROR:
            &gEfiCallerIdGuid,
            &Private->Id
            );
-    if (Private != NULL) {
-      FreePool (Private);
-    }
   }
 
   if (IpVersion == IP_VERSION_4) {
@@ -1364,6 +1361,10 @@ ON_ERROR:
     PxeBcDestroyIp6Children (This, Private);
   }
 
+  if (FirstStart && Private != NULL) {
+    FreePool (Private);
+  }
+
   return Status;
 }