[FFmpeg-cvslog] opusdec: make sure all substreams have the same number of coded samples

[Anton Khirnov]

ffmpeg | branch: master | Anton Khirnov <anton at khirnov.net> | Mon Nov 24 11:16:46 2014 +0100| [1973079417e8701b52ba810a72cb6c7c6f7f9a56] | committer: Anton Khirnov

opusdec: make sure all substreams have the same number of coded samples

Fixes invalid writes with invalid multichannel streams.

CC:libav-stable at libav.org

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=1973079417e8701b52ba810a72cb6c7c6f7f9a56
---

 libavcodec/opusdec.c |    6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/libavcodec/opusdec.c b/libavcodec/opusdec.c
index bf3a54b..771922e 100644
--- a/libavcodec/opusdec.c
+++ b/libavcodec/opusdec.c
@@ -500,6 +500,12 @@ static int opus_decode_packet(AVCodecContext *avctx, void *data,
                 av_log(avctx, AV_LOG_ERROR, "Error parsing the packet header.\n");
                 return ret;
             }
+            if (coded_samples != s->packet.frame_count * s->packet.frame_duration) {
+                av_log(avctx, AV_LOG_ERROR,
+                       "Mismatching coded sample count in substream %d.\n", i);
+                return AVERROR_INVALIDDATA;
+            }
+
             s->silk_samplerate = get_silk_samplerate(s->packet.config);
         }