[FFmpeg-cvslog] avformat/matroskadec: check out_samplerate before using it in av_rescale()

[Michael Niedermayer]

ffmpeg | branch: release/2.0 | Michael Niedermayer <michaelni at gmx.at> | Sun Aug 18 02:20:54 2013 +0200| [dbb534cea6b2b135485fd04cea022d08a350ac37] | committer: James Almer

avformat/matroskadec: check out_samplerate before using it in av_rescale()

Prevent assertion failure with damaged input

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
(cherry picked from commit 338f8b2eaf36f078eb5cc26ac10e651dc4c48243)

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=dbb534cea6b2b135485fd04cea022d08a350ac37
---

 libavformat/matroskadec.c |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/libavformat/matroskadec.c b/libavformat/matroskadec.c
index d72c4ef..b686eeb 100644
--- a/libavformat/matroskadec.c
+++ b/libavformat/matroskadec.c
@@ -1737,6 +1737,8 @@ static int matroska_read_header(AVFormatContext *s)
             avio_wl16(&b, 1);
             avio_wl16(&b, track->audio.channels);
             avio_wl16(&b, track->audio.bitdepth);
+            if (track->audio.out_samplerate < 0 || track->audio.out_samplerate > INT_MAX)
+                return AVERROR_INVALIDDATA;
             avio_wl32(&b, track->audio.out_samplerate);
             avio_wl32(&b, av_rescale((matroska->duration * matroska->time_scale), track->audio.out_samplerate, AV_TIME_BASE * 1000));
         } else if (codec_id == AV_CODEC_ID_RV10 || codec_id == AV_CODEC_ID_RV20 ||