X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;ds=sidebyside;f=libavcodec%2Fbintext.c;h=1aeed21f516746e7dc1aed76d21a31f25faecf04;hb=0a071f7124beaf0929f772a8618ac1b6c17b0222;hp=49b75c9e271ea8140d3f27fea763e248aa54c8b6;hpb=e645d7a6d452df83cedcbb1d6708429ceea156da;p=ffmpeg

diff --git a/libavcodec/bintext.c b/libavcodec/bintext.c
index 49b75c9e271..1aeed21f516 100644
--- a/libavcodec/bintext.c
+++ b/libavcodec/bintext.c
@@ -63,6 +63,10 @@ static av_cold int decode_init(AVCodecContext *avctx)
             av_log(avctx, AV_LOG_ERROR, "not enough extradata\n");
             return AVERROR_INVALIDDATA;
         }
+        if (!s->font_height) {
+            av_log(avctx, AV_LOG_ERROR, "invalid font height\n");
+            return AVERROR_INVALIDDATA;
+        }
     } else {
         s->font_height = 8;
         s->flags = 0;