[FFmpeg-devel] [PATCH 1/4] avfilter/vf_aspect: Fix integer overflow in compute_dar()

[Paul B Mahol]

LGTM

On 2/15/20, Michael Niedermayer <michael at niedermayer.cc> wrote:
> Fixes: signed integer overflow: 1562273630 * 17 cannot be represented in
> type 'int'
> Fixes: Ticket8323
>
> Found-by: Suhwan
> Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> ---
>  libavfilter/vf_aspect.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/libavfilter/vf_aspect.c b/libavfilter/vf_aspect.c
> index c042698ef7..70e7fedc97 100644
> --- a/libavfilter/vf_aspect.c
> +++ b/libavfilter/vf_aspect.c
> @@ -78,7 +78,7 @@ static int filter_frame(AVFilterLink *link, AVFrame
> *frame)
>  static inline void compute_dar(AVRational *dar, AVRational sar, int w, int
> h)
>  {
>      if (sar.num && sar.den) {
> -        av_reduce(&dar->num, &dar->den, sar.num * w, sar.den * h, INT_MAX);
> +        av_reduce(&dar->num, &dar->den, sar.num * (int64_t)w, sar.den *
> (int64_t)h, INT_MAX);
>      } else {
>          av_reduce(&dar->num, &dar->den, w, h, INT_MAX);
>      }
> --
> 2.17.1
>
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