[FFmpeg-devel] [PATCH 4/4] avformat/utils: Fix integer overflow with complex time bases in avformat_find_stream_info()

[Paul B Mahol]

probably ok

On 2/15/20, Michael Niedermayer <michael at niedermayer.cc> wrote:
> Fixes: signed integer overflow: 2045163756 * 2 cannot be represented in type
> 'int'
> Fixes: Ticket5132
>
> Found-by: tsmith
> Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> ---
>  libavformat/utils.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/libavformat/utils.c b/libavformat/utils.c
> index 7ff5ea9702..a220e4bc30 100644
> --- a/libavformat/utils.c
> +++ b/libavformat/utils.c
> @@ -4062,7 +4062,7 @@ FF_ENABLE_DEPRECATION_WARNINGS
>
>              if (!st->r_frame_rate.num) {
>                  if (    avctx->time_base.den * (int64_t) st->time_base.num
> -                    <= avctx->time_base.num * avctx->ticks_per_frame *
> (int64_t) st->time_base.den) {
> +                    <= avctx->time_base.num * avctx->ticks_per_frame *
> (uint64_t) st->time_base.den) {
>                      av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den,
>                                avctx->time_base.den,
> (int64_t)avctx->time_base.num * avctx->ticks_per_frame, INT_MAX);
>                  } else {
> --
> 2.17.1
>
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