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| author | Vittorio Giovara <vittorio.giovara@gmail.com> | 2014-10-24 13:15:36 +0100 |
|---|---|---|
| committer | Vittorio Giovara <vittorio.giovara@gmail.com> | 2014-10-29 16:54:43 +0000 |
| commit | f64d7e919eabd427f3e6dd4a1219e448c78deb42 (patch) | |
| tree | 564cabd2e25133a53b36900b3d11b9b192c6f026 | |
| parent | b3d11437ca55d81eeb10c923343ad69b73895fa8 (diff) | |
| download | ffmpeg-f64d7e919eabd427f3e6dd4a1219e448c78deb42.tar.gz | |
mtv: improve header check and avoid division by zero
CC: libav-stable@libav.org
Bug-Id: CID 732203 / CID 732204
| -rw-r--r-- | libavformat/mtv.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/libavformat/mtv.c b/libavformat/mtv.c index 5a7f0477ff..7ad7618434 100644 --- a/libavformat/mtv.c +++ b/libavformat/mtv.c @@ -96,14 +96,17 @@ static int mtv_read_header(AVFormatContext *s) /* Calculate width and height if missing from header */ - if(!mtv->img_width) + if (!mtv->img_width && mtv->img_height > 0 && mtv->img_bpp >= 8) mtv->img_width=mtv->img_segment_size / (mtv->img_bpp>>3) / mtv->img_height; - if(!mtv->img_height) + if (!mtv->img_height && mtv->img_width > 0 && mtv->img_bpp >= 8) mtv->img_height=mtv->img_segment_size / (mtv->img_bpp>>3) / mtv->img_width; + if (!mtv->img_width || !mtv->img_height) + return AVERROR_INVALIDDATA; + avio_skip(pb, 4); audio_subsegments = avio_rl16(pb); |