From a687f448f938f0660356f3c07e393f93ef7166c4 Mon Sep 17 00:00:00 2001
From: Zhang Lubo <lubo.zhang@intel.com>
Date: Fri, 11 Sep 2015 00:52:51 +0000
Subject: NetworkPkg: PXE Driver's LoadFile protocol should check FilePath

PXE driver's LoadFile protocol should check the input parameter
FilePath to see whether it's a supported device path.If not,
it should return invalid parameter, do not continue PXE boot.

(Sync patch r18436 from main trunk.)

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Zhang Lubo <lubo.zhang@intel.com>
Reviewed-by: Fu Siyuan <siyuan.fu@intel.com>
Reviewed-by: Ye Ting <ting.ye@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/branches/UDK2015@18441 6f19259b-4bc3-4df7-8a09-765794883524
---
 NetworkPkg/UefiPxeBcDxe/PxeBcImpl.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/NetworkPkg/UefiPxeBcDxe/PxeBcImpl.c b/NetworkPkg/UefiPxeBcDxe/PxeBcImpl.c
index cdcf2f0d3e..367a1356ab 100644
--- a/NetworkPkg/UefiPxeBcDxe/PxeBcImpl.c
+++ b/NetworkPkg/UefiPxeBcDxe/PxeBcImpl.c
@@ -2328,6 +2328,10 @@ EfiPxeLoadFile (
   EFI_STATUS                  Status;
   BOOLEAN                     MediaPresent;
 
+  if (FilePath == NULL || !IsDevicePathEnd (FilePath)) {
+    return EFI_INVALID_PARAMETER;
+  }
+  
   VirtualNic = PXEBC_VIRTUAL_NIC_FROM_LOADFILE (This);
   Private    = VirtualNic->Private;
   PxeBc      = &Private->PxeBc;
-- 
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