[FFmpeg-cvslog] avformat/wavdec: Check chunk_size

[李赞]

ffmpeg | branch: master | 李赞 <lizan at ruc.edu.cn> | Wed May 10 14:55:34 2017 +0200| [3d232196372f309a75ed074c4cef30578eec1782] | committer: Michael Niedermayer

avformat/wavdec: Check chunk_size

Fixes integer overflow and out of array access

Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=3d232196372f309a75ed074c4cef30578eec1782
---

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

diff --git a/libavformat/wavdec.c b/libavformat/wavdec.c
index 602ce97530..81dbc9f16e 100644
--- a/libavformat/wavdec.c
+++ b/libavformat/wavdec.c
@@ -841,6 +841,8 @@ static int w64_read_header(AVFormatContext *s)
                 chunk_key[4] = 0;
                 avio_read(pb, chunk_key, 4);
                 chunk_size = avio_rl32(pb);
+                if (chunk_size == UINT32_MAX)
+                    return AVERROR_INVALIDDATA;
 
                 value = av_mallocz(chunk_size + 1);
                 if (!value)