add security check.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@8680 6f19259b-4bc3-4df7-8a09-765794883524

1 files changed, 11 insertions, 7 deletions

diff --git a/MdeModulePkg/Universal/Network/ArpDxe/ArpImpl.c b/MdeModulePkg/Universal/Network/ArpDxe/ArpImpl.c
index d42937e..aa47072 100644
--- a/MdeModulePkg/Universal/Network/ArpDxe/ArpImpl.c
+++ b/MdeModulePkg/Universal/Network/ArpDxe/ArpImpl.c
@@ -1,7 +1,7 @@
 /** @file

   The implementation of the ARP protocol.

   

-Copyright (c) 2006 - 2008, Intel Corporation.<BR>

+Copyright (c) 2006 - 2009, Intel Corporation.<BR>

 All rights reserved. This program and the accompanying materials

 are licensed and made available under the terms and conditions of the BSD License

 which accompanies this distribution.  The full text of the license may be found at<BR>

@@ -1083,6 +1083,7 @@ ArpSendFrame (
   Packet = AllocatePool (TotalLength);

   if (Packet == NULL) {

     DEBUG ((EFI_D_ERROR, "ArpSendFrame: Allocate memory for Packet failed.\n"));

+    ASSERT (Packet != NULL);

   }

 

   TmpPtr = Packet;

@@ -1451,6 +1452,7 @@ ArpFindCacheEntry (
   UINT32             FoundCount;

   EFI_ARP_FIND_DATA  *FindData;

   LIST_ENTRY         *CacheTable;

+  UINT32             FoundEntryLength;

 

   ArpService = Instance->ArpService;

 

@@ -1567,12 +1569,14 @@ ArpFindCacheEntry (
     goto CLEAN_EXIT;

   }

 

+  //

+  // Found the entry length, make sure its 8 bytes alignment.

+  //

+  FoundEntryLength = (((sizeof (EFI_ARP_FIND_DATA) + Instance->ConfigData.SwAddressLength +

+                       ArpService->SnpMode.HwAddressSize) + 3) & ~(0x3));

+

   if (EntryLength != NULL) {

-    //

-    // Return the entry length, make sure its 8 bytes alignment.

-    //

-    *EntryLength = (((sizeof (EFI_ARP_FIND_DATA) + Instance->ConfigData.SwAddressLength +

-                   ArpService->SnpMode.HwAddressSize) + 3) & ~(0x3));

+    *EntryLength = FoundEntryLength;

   }

 

   if (EntryCount != NULL) {

@@ -1589,7 +1593,7 @@ ArpFindCacheEntry (
   //

   // Allocate buffer to copy the found entries.

   //

-  FindData = AllocatePool (FoundCount * (*EntryLength));

+  FindData = AllocatePool (FoundCount * FoundEntryLength);

   if (FindData == NULL) {

     DEBUG ((EFI_D_ERROR, "ArpFindCacheEntry: Failed to allocate memory.\n"));

     Status = EFI_OUT_OF_RESOURCES;