@@ -527,6 +527,11 @@ static av_cold int rv10_decode_init(AVCodecContext *avctx)

     MpegEncContext *s = avctx->priv_data;

     static int done=0;

+    if (avctx->extradata_size < 8) {

+        av_log(avctx, AV_LOG_ERROR, "Extradata is too small.\n");

+        return -1;

+    }

+

     MPV_decode_defaults(s);

     s->avctx= avctx;