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| author | James Almer <jamrial@gmail.com> | 2017-11-27 13:39:42 -0300 |
|---|---|---|
| committer | James Almer <jamrial@gmail.com> | 2017-11-27 13:39:55 -0300 |
| commit | 9d464dc3fccb53f1e7c83e3453084c1a7fb90503 (patch) | |
| tree | 28f1884d4001d5c904e8c1daae77d3a4d5cb8f14 | |
| parent | 2d1594a8d6a754a426cb53184dccf9cf8c8a94b0 (diff) | |
| download | ffmpeg-9d464dc3fccb53f1e7c83e3453084c1a7fb90503.tar.gz | |
avformat/matroskaenc: actually enforce the stream limit
Prevents out of array accesses. Adressess ticket #6873
Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: James Almer <jamrial@gmail.com>
| -rw-r--r-- | libavformat/matroskaenc.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/libavformat/matroskaenc.c b/libavformat/matroskaenc.c index dad6d6c93f..06126781f8 100644 --- a/libavformat/matroskaenc.c +++ b/libavformat/matroskaenc.c @@ -1859,6 +1859,13 @@ static int mkv_write_header(AVFormatContext *s) av_dict_get(s->metadata, "alpha_mode", NULL, 0)) version = 4; + if (s->nb_streams > MAX_TRACKS) { + av_log(s, AV_LOG_ERROR, + "At most %d streams are supported for muxing in Matroska\n", + MAX_TRACKS); + return AVERROR(EINVAL); + } + for (i = 0; i < s->nb_streams; i++) { if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_ATRAC3 || s->streams[i]->codecpar->codec_id == AV_CODEC_ID_COOK || |