avcodec/vc1: Check for excessive resolution
[ffmpeg.git] / libavcodec / vc1.c
index 42bfca55b153386159de139137a7f70f16f0f1ec..13119bd0b3d04ed5b3c50caae3c539372ab42ee5 100644 (file)
@@ -451,7 +451,11 @@ static int decode_sequence_header_adv(VC1Context *v, GetBitContext *gb)
             h = get_bits(gb, 8) + 1;
             v->s.avctx->sample_aspect_ratio = (AVRational){w, h};
         } else {
-            av_reduce(&v->s.avctx->sample_aspect_ratio.num,
+            if (v->s.avctx->width  > v->max_coded_width ||
+                v->s.avctx->height > v->max_coded_height) {
+                avpriv_request_sample(v->s.avctx, "Huge resolution");
+            } else
+                av_reduce(&v->s.avctx->sample_aspect_ratio.num,
                       &v->s.avctx->sample_aspect_ratio.den,
                       v->s.avctx->height * w,
                       v->s.avctx->width * h,