Fix a bug in IP driver that the fragment overlap check may be skipped incorrectly.

[mirror_edk2.git] / MdeModulePkg / Universal / Network / Ip4Dxe / Ip4Input.c

diff --git a/MdeModulePkg/Universal/Network/Ip4Dxe/Ip4Input.c b/MdeModulePkg/Universal/Network/Ip4Dxe/Ip4Input.c
index 62163f4c57bc5c2fc9e85354d4a8bb97f1712c54..38ad1c39daf4a03d486495b5ca483fec61df7963 100644 (file)
--- a/MdeModulePkg/Universal/Network/Ip4Dxe/Ip4Input.c
+++ b/MdeModulePkg/Universal/Network/Ip4Dxe/Ip4Input.c
@@ -1,7 +1,7 @@
 /** @file\r
   IP4 input process.\r
   \r
-Copyright (c) 2005 - 2012, Intel Corporation. All rights reserved.<BR>\r
+Copyright (c) 2005 - 2014, Intel Corporation. All rights reserved.<BR>\r
 This program and the accompanying materials\r
 are licensed and made available under the terms and conditions of the BSD License\r
 which accompanies this distribution.  The full text of the license may be found at\r
@@ -292,7 +292,7 @@ Ip4Reassemble (
   // check whether THIS.Start < PREV.End for overlap. If two fragments\r
   // overlaps, trim the overlapped part off THIS fragment.\r
   //\r
-  if ((Cur != Head) && ((Prev = Cur->BackLink) != Head)) {\r
+  if ((Prev = Cur->BackLink) != Head) {\r
     Fragment  = NET_LIST_USER_STRUCT (Prev, NET_BUF, List);\r
     Node      = IP4_GET_CLIP_INFO (Fragment);\r
 \r