check for sane values in ogg_get_length(), fix lol-ffplay.ogm fuzz test

Originally committed as revision 7536 to svn://svn.ffmpeg.org/ffmpeg/trunk
18 years ago · e22f2aaf99
parent 20be72c890
commit e22f2aaf99
1 changed files with 2 additions and 1 deletions
--- a/libavformat/ogg2.c
+++ b/libavformat/ogg2.c
@ -484,7 +484,8 @@ ogg_get_length (AVFormatContext * s)
    url_fseek (&s->pb, end, SEEK_SET);

    while (!ogg_read_page (s, &i)){
-        if (ogg->streams[i].granule != -1 && ogg->streams[i].granule != 0)
+        if (ogg->streams[i].granule != -1 && ogg->streams[i].granule != 0 &&
+            ogg->streams[i].codec)
            idx = i;
    }