Carl Eugen Hoyos:
> Am Mo., 30. März 2020 um 09:30 Uhr schrieb Andreas Rheinhardt
> <andreas.rheinha...@gmail.com>:
>>
>> The WebM DASH Manifest muxer only supports VP8, VP9, Vorbis and Opus,
>> but there was no check for this. The codec type is used to get a pointer
>> to a string containing the codec name or NULL if it is not one of those
>> four codecs. Said pointer has then been used without further checks as
>> string for the %s conversion specifier in an avio_printf()) call which
>> is undefined behaviour.
>>
>> This commit adds a check for the supported codec types.
>>
>> Signed-off-by: Andreas Rheinhardt <andreas.rheinha...@gmail.com>
>> ---
>> libavformat/webmdashenc.c | 8 ++++++++
>> 1 file changed, 8 insertions(+)
>>
>> diff --git a/libavformat/webmdashenc.c b/libavformat/webmdashenc.c
>> index d05b265330..182a361eae 100644
>> --- a/libavformat/webmdashenc.c
>> +++ b/libavformat/webmdashenc.c
>> @@ -516,6 +516,14 @@ static int
>> webm_dash_manifest_write_header(AVFormatContext *s)
>> double start = 0.0;
>> int ret;
>> WebMDashMuxContext *w = s->priv_data;
>> +
>> + for (unsigned i = 0; i < s->nb_streams; i++) {
>> + enum AVCodecID codec_id = s->streams[i]->codecpar->codec_id;
>> + if ((codec_id != AV_CODEC_ID_VP8) && (codec_id != AV_CODEC_ID_VP9)
>> &&
>> + (codec_id != AV_CODEC_ID_VORBIS) && (codec_id !=
>> AV_CODEC_ID_OPUS))
>> + return AVERROR(EINVAL);
>
> Too man parenthesis imo...
>
Fixed locally.
- Andreas
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