[FFmpeg-cvslog] avformat/rmdec: Check codec_data_size

[Michael Niedermayer]

ffmpeg | branch: release/1.2 | Michael Niedermayer <michaelni at gmx.at> | Wed Dec  3 20:01:18 2014 +0100| [6560e61826d378fbd2e743a23c080a32bc2c6186] | committer: Michael Niedermayer

avformat/rmdec: Check codec_data_size

Fixes infinite loop
Fixes Ticket4154

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
(cherry picked from commit a6f730730b82645a9d31aad0968487cb77d6946c)

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=6560e61826d378fbd2e743a23c080a32bc2c6186
---

 libavformat/rmdec.c |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/libavformat/rmdec.c b/libavformat/rmdec.c
index 2edbfc3..06a327e 100644
--- a/libavformat/rmdec.c
+++ b/libavformat/rmdec.c
@@ -309,6 +309,9 @@ ff_rm_read_mdpr_codecdata (AVFormatContext *s, AVIOContext *pb,
     int64_t codec_pos;
     int ret;
 
+    if (codec_data_size < 0)
+        return AVERROR_INVALIDDATA;
+
     avpriv_set_pts_info(st, 64, 1, 1000);
     codec_pos = avio_tell(pb);
     v = avio_rb32(pb);