From: DRC <dcommander@users.sourceforge.net>
Date: Tue, 4 Jan 2011 19:14:44 +0000 (+0000)
Subject: Further protect against bad Huffman codes
X-Git-Tag: v1.0.90~87
X-Git-Url: https://source.dussan.org/?a=commitdiff_plain;h=6ed99fb6d064be14ce3f1fda2937c7b8033371d8;p=tigervnc.git

Further protect against bad Huffman codes


git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@4231 3789f03b-4d11-0410-bbf8-ca57d06f2519
---

diff --git a/common/jpeg/jdhuff.c b/common/jpeg/jdhuff.c
index 04b38d5d..0291bc97 100644
--- a/common/jpeg/jdhuff.c
+++ b/common/jpeg/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 ]; \
   } \
 }