From: Ronald S. Bultje <rsbultje@gmail.com>
Date: Thu, 29 Mar 2012 03:00:38 +0000 (-0700)
Subject: lzw: fix potential integer overflow.
X-Git-Tag: v9_beta1~2165
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=0399fe0fd23ff272282dd093cc2720deb6f87ea8;p=platform%2Fupstream%2Flibav.git

lzw: fix potential integer overflow.
---

diff --git a/libavcodec/lzw.c b/libavcodec/lzw.c
index b674d4e29..876151028 100644
--- a/libavcodec/lzw.c
+++ b/libavcodec/lzw.c
@@ -102,7 +102,7 @@ void ff_lzw_decode_tail(LZWState *p)
 
     if(s->mode == FF_LZW_GIF) {
         while (s->bs > 0) {
-            if (s->pbuf + s->bs >= s->ebuf) {
+            if (s->bs >= s->ebuf - s->pbuf) {
                 s->pbuf = s->ebuf;
                 break;
             } else {