From e007059d6617ca966380810fe03c571566ecd9c3 Mon Sep 17 00:00:00 2001
From: Paul B Mahol <onemda@gmail.com>
Date: Thu, 13 Feb 2020 12:15:42 +0100
Subject: [PATCH] avcodec/midivid: only multiple of 4 width/height are possible

---
 libavcodec/midivid.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libavcodec/midivid.c b/libavcodec/midivid.c
index afa394fca5..2200440e2c 100644
--- a/libavcodec/midivid.c
+++ b/libavcodec/midivid.c
@@ -238,6 +238,9 @@ static av_cold int decode_init(AVCodecContext *avctx)
     MidiVidContext *s = avctx->priv_data;
     int ret = av_image_check_size(avctx->width, avctx->height, 0, avctx);
 
+    if (avctx->width & 3 || avctx->height & 3)
+        ret = AVERROR_INVALIDDATA;
+
     if (ret < 0) {
         av_log(avctx, AV_LOG_ERROR, "Invalid image size %dx%d.\n",
                avctx->width, avctx->height);