2 files changed, 9 insertions, 2 deletions
diff --git a/MdePkg/Library/BaseUefiDecompressLib/BaseUefiDecompressLib.c b/MdePkg/Library/BaseUefiDecompressLib/BaseUefiDecompressLib.c
index 30f85bce71..f6b1fe005d 100644
--- a/MdePkg/Library/BaseUefiDecompressLib/BaseUefiDecompressLib.c
+++ b/MdePkg/Library/BaseUefiDecompressLib/BaseUefiDecompressLib.c
@@ -1,7 +1,7 @@
 /** @file
   UEFI Decompress Library implementation refer to UEFI specification.
 
-  Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
+  Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
   Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
   This program and the accompanying materials
   are licensed and made available under the terms and conditions of the BSD License
@@ -117,6 +117,7 @@ GetBits (
 
   Creates Huffman Code mapping table for Extra Set, Char&Len Set
   and Position Set according to code length array.
+  If TableBits > 16, then ASSERT ().
 
   @param  Sd        The global scratch data
   @param  NumOfChar Number of symbols in the symbol set
@@ -152,6 +153,11 @@ MakeTable (
   UINT16  WordOfStart;
   UINT16  WordOfCount;
 
+  //
+  // The maximum mapping table width supported by this internal
+  // working function is 16.
+  //
+  ASSERT (TableBits <= 16);
 
   for (Index = 0; Index <= 16; Index++) {
     Count[Index] = 0;
diff --git a/MdePkg/Library/BaseUefiDecompressLib/BaseUefiDecompressLibInternals.h b/MdePkg/Library/BaseUefiDecompressLib/BaseUefiDecompressLibInternals.h
index a0e44dc076..856c1f7b01 100644
--- a/MdePkg/Library/BaseUefiDecompressLib/BaseUefiDecompressLibInternals.h
+++ b/MdePkg/Library/BaseUefiDecompressLib/BaseUefiDecompressLibInternals.h
@@ -1,7 +1,7 @@
 /** @file
   Internal data structure defintions for Base UEFI Decompress Libary.
 
-  Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
+  Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
   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
@@ -107,6 +107,7 @@ GetBits (
 
   Creates Huffman Code mapping table for Extra Set, Char&Len Set
   and Position Set according to code length array.
+  If TableBits > 16, then ASSERT ().
 
   @param  Sd        The global scratch data
   @param  NumOfChar Number of symbols in the symbol set