X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Fansi.c;h=19c88d8d516dcc8a0b0376beb6b3004524b0a99b;hb=facc19ef06a753515a3fa604269dd1aa412dc08f;hp=4808ea7fff87a680ce0944efd020b40aea0b4f5d;hpb=bca30ed2b67f095fd31e07319a622ac30ad22978;p=ffmpeg

diff --git a/libavcodec/ansi.c b/libavcodec/ansi.c
index 4808ea7fff8..19c88d8d516 100644
--- a/libavcodec/ansi.c
+++ b/libavcodec/ansi.c
@@ -94,6 +94,9 @@ static av_cold int decode_init(AVCodecContext *avctx)
         int ret = ff_set_dimensions(avctx, 80 << 3, 25 << 4);
         if (ret < 0)
             return ret;
+    } else if (avctx->width % FONT_WIDTH || avctx->height % s->font_height) {
+        av_log(avctx, AV_LOG_ERROR, "Invalid dimensions %d %d\n", avctx->width, avctx->height);
+        return AVERROR(EINVAL);
     }
     return 0;
 }