From fa1d18385d904d530b4aec83ab7757a33397de6e Mon Sep 17 00:00:00 2001
From: DRC <dcommander@users.sourceforge.net>
Date: Wed, 26 Jan 2011 05:35:20 +0000
Subject: [PATCH] Further protect against invalid Huffman codes

git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/branches/1.0.x@324 632fc199-4ca6-4c93-a231-07263d6284db
---
 ChangeLog.txt | 6 ++++++
 jdhuff.c      | 2 +-
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/ChangeLog.txt b/ChangeLog.txt
index c8d48ab..5f6d331 100644
--- a/ChangeLog.txt
+++ b/ChangeLog.txt
@@ -1,3 +1,9 @@
+Significant changes since 1.0.1
+===============================
+
+[1] Added further protections against invalid Huffman codes.
+
+
 Significant changes since 1.0.0
 ===============================
 
diff --git a/jdhuff.c b/jdhuff.c
index 04b38d5..0291bc9 100644
--- a/jdhuff.c
+++ b/jdhuff.c
@@ -658,7 +658,7 @@ decode_mcu_slow (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
       symbol |= GET_BITS(1); \
       size++; \
     } \
-    symbol = htbl->pub->huffval[ (int) (symbol + htbl->valoffset[size]) ]; \
+    symbol = htbl->pub->huffval[ (int) (symbol + htbl->valoffset[size]) & 0xFF ]; \
   } \
 }
 
-- 
2.40.0