[FFmpeg-devel] [PATCH 5/5] avformat/mvdec: Check bytes_per_sample

[Peter Ross]

On Thu, Dec 23, 2021 at 10:15:27PM +0100, Michael Niedermayer wrote:
> Fixes: division by zero
> Fixes: 42814/clusterfuzz-testcase-minimized-ffmpeg_dem_MV_fuzzer-4787014237552640
> 
> Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
> Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> ---
>  libavformat/mvdec.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/libavformat/mvdec.c b/libavformat/mvdec.c
> index 1a5012e5076..390f6ba4de8 100644
> --- a/libavformat/mvdec.c
> +++ b/libavformat/mvdec.c
> @@ -366,6 +366,9 @@ static int mv_read_header(AVFormatContext *avctx)
>              avpriv_request_sample(avctx, "Audio compression (format %i)", v);
>          }
>  
> +        if (bytes_per_sample <= 0)
> +            return AVERROR_INVALIDDATA;
> +
>          if (set_channels(avctx, ast, avio_rb32(pb)) < 0)
>              return AVERROR_INVALIDDATA;

please apply.

-- Peter
(A907 E02F A6E5 0CD2 34CD 20D2 6760 79C5 AC40 DD6B)
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 195 bytes
Desc: not available
URL: <https://ffmpeg.org/pipermail/ffmpeg-devel/attachments/20211224/1e49c497/attachment.sig>