X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Fvp9recon.c;h=9a4e7c7a039621889a607297451c803ba8d647db;hb=e3e2702d400e047d7a12b3c4f7ee666ffdafd090;hp=49bb04e1f40fff3d902907043bb137cdd81aee60;hpb=fef55251d82ca1043689dddf5d03aa96c75cd4bb;p=ffmpeg

diff --git a/libavcodec/vp9recon.c b/libavcodec/vp9recon.c
index 49bb04e1f40..9a4e7c7a039 100644
--- a/libavcodec/vp9recon.c
+++ b/libavcodec/vp9recon.c
@@ -572,6 +572,16 @@ static av_always_inline void inter_recon(VP9TileData *td, int bytesperpixel)
     VP9Block *b = td->b;
     int row = td->row, col = td->col;
 
+    if (s->mvscale[b->ref[0]][0] == REF_INVALID_SCALE ||
+        (b->comp && s->mvscale[b->ref[1]][0] == REF_INVALID_SCALE)) {
+        if (!s->td->error_info) {
+            s->td->error_info = AVERROR_INVALIDDATA;
+            av_log(NULL, AV_LOG_ERROR, "Bitstream not supported, "
+                                       "reference frame has invalid dimensions\n");
+        }
+        return;
+    }
+
     if (s->mvscale[b->ref[0]][0] || (b->comp && s->mvscale[b->ref[1]][0])) {
         if (bytesperpixel == 1) {
             inter_pred_scaled_8bpp(td);