X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavformat%2Foggparsevorbis.c;h=bcfd246b8dcf3760ca8d1566b85a6886272b65fa;hb=517573a67088b5c7a25c18373434e3448892ee93;hp=29b1ab514e642c907aa894aef92600dc9093aec7;hpb=7386b4ff39506b7a34b3689cc4b05993ed9b4a4f;p=ffmpeg

diff --git a/libavformat/oggparsevorbis.c b/libavformat/oggparsevorbis.c
index 29b1ab514e6..bcfd246b8dc 100644
--- a/libavformat/oggparsevorbis.c
+++ b/libavformat/oggparsevorbis.c
@@ -230,6 +230,10 @@ static int fixup_vorbis_headers(AVFormatContext *as,
 
     len = priv->len[0] + priv->len[1] + priv->len[2];
     buf_len = len + len / 255 + 64;
+
+    if (*buf)
+        return AVERROR_INVALIDDATA;
+
     ptr = *buf = av_realloc(NULL, buf_len);
     if (!ptr)
         return AVERROR(ENOMEM);