lzw: fix potential integer overflow.

13 years ago · 0399fe0fd2
parent b7b1509d06
commit 0399fe0fd2
1 changed files with 1 additions and 1 deletions
--- 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 {