lzw: fix potential integer overflow.

0399fe0f · Ronald S. Bultje · b7b1509d · 0399fe0f
Commit 0399fe0f authored Mar 29, 2012 by Ronald S. Bultje
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lzw.c libavcodec/lzw.c +1 -1

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--- 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 {