[FFmpeg-devel] [PATCH 2/2] avcodec/dstdec: Check sample rate

[Paul B Mahol]

LGTM

On 2/13/20, Michael Niedermayer <michael at niedermayer.cc> wrote:
> Fixes: out of array access
> Fixes:
> 20659/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_DST_fuzzer-5735812071424000
>
> Found-by: continuous fuzzing process
> https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
> Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> ---
>  libavcodec/dstdec.c | 5 +++++
>  1 file changed, 5 insertions(+)
>
> diff --git a/libavcodec/dstdec.c b/libavcodec/dstdec.c
> index bdabced823..0505d3fde5 100644
> --- a/libavcodec/dstdec.c
> +++ b/libavcodec/dstdec.c
> @@ -86,6 +86,11 @@ static av_cold int decode_init(AVCodecContext *avctx)
>          return AVERROR_PATCHWELCOME;
>      }
>
> +    if (DST_SAMPLES_PER_FRAME(avctx->sample_rate) & 7) {
> +        avpriv_request_sample(avctx, "sample rate %d", avctx->sample_rate);
> +        return AVERROR_PATCHWELCOME;
> +    }
> +
>      avctx->sample_fmt = AV_SAMPLE_FMT_FLT;
>
>      for (i = 0; i < avctx->channels; i++)
> --
> 2.17.1
>
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