[FFmpeg-devel] [PATCH 4/6] ircamdec: prevent overflow during block alignment, calculation

[Paul B Mahol]

On 12/15/16, Andreas Cadhalpun <andreas.cadhalpun at googlemail.com> wrote:
> Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun at googlemail.com>
> ---
>  libavformat/ircamdec.c | 5 +++++
>  1 file changed, 5 insertions(+)
>
> diff --git a/libavformat/ircamdec.c b/libavformat/ircamdec.c
> index 59f3a49..3efc2b4 100644
> --- a/libavformat/ircamdec.c
> +++ b/libavformat/ircamdec.c
> @@ -96,6 +96,11 @@ static int ircam_read_header(AVFormatContext *s)
>      }
>
>      st->codecpar->bits_per_coded_sample =
> av_get_bits_per_sample(st->codecpar->codec_id);
> +    if (st->codecpar->channels && st->codecpar->bits_per_coded_sample >
> INT_MAX / st->codecpar->channels) {
> +        av_log(s, AV_LOG_ERROR, "Overflow during block alignment
> calculation %d * %d\n",
> +               st->codecpar->bits_per_coded_sample,
> st->codecpar->channels);
> +        return AVERROR_INVALIDDATA;
> +    }
>      st->codecpar->block_align = st->codecpar->bits_per_coded_sample *
> st->codecpar->channels / 8;
>      avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
>      avio_skip(s->pb, 1008);
> --
> 2.10.2
>
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ok