X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavformat%2Frealtextdec.c;h=c2316da0ed8d1878df8d85fae698cc8d7502edef;hb=2d8d554f15a7a27cfeca81467cc9341a86f784e2;hp=618d4f78ecfce5ff59c573fec663143fd0b0d72d;hpb=06476249cd2332e30b66576633b2827adf3478dd;p=ffmpeg

diff --git a/libavformat/realtextdec.c b/libavformat/realtextdec.c
index 618d4f78ecf..c2316da0ed8 100644
--- a/libavformat/realtextdec.c
+++ b/libavformat/realtextdec.c
@@ -35,7 +35,7 @@ typedef struct {
     FFDemuxSubtitlesQueue q;
 } RealTextContext;
 
-static int realtext_probe(AVProbeData *p)
+static int realtext_probe(const AVProbeData *p)
 {
     char buf[7];
     FFTextReader tr;
@@ -87,6 +87,10 @@ static int realtext_read_header(AVFormatContext *s)
             /* save header to extradata */
             const char *p = ff_smil_get_attr_ptr(buf.str, "duration");
 
+            if (st->codecpar->extradata) {
+                res = AVERROR_INVALIDDATA;
+                goto end;
+            }
             if (p)
                 duration = read_ts(p);
             st->codecpar->extradata = av_strdup(buf.str);
@@ -119,6 +123,8 @@ static int realtext_read_header(AVFormatContext *s)
 
 end:
     av_bprint_finalize(&buf, NULL);
+    if (res < 0)
+        ff_subtitles_queue_clean(&rt->q);
     return res;
 }