[FFmpeg-devel] [PATCH v2 3/3] avfilter/af_adelay: Check sscanf() return value

[Limin Wang]

On Sat, Mar 28, 2020 at 07:06:13PM +0100, Michael Niedermayer wrote:
> On Sat, Mar 28, 2020 at 08:17:33AM +0800, lance.lmwang at gmail.com wrote:
> > From: Limin Wang <lance.lmwang at gmail.com>
> > 
> > Signed-off-by: Limin Wang <lance.lmwang at gmail.com>
> > ---
> >  libavfilter/af_adelay.c | 5 ++++-
> >  1 file changed, 4 insertions(+), 1 deletion(-)
> > 
> > diff --git a/libavfilter/af_adelay.c b/libavfilter/af_adelay.c
> > index c964777..2bb05e7 100644
> > --- a/libavfilter/af_adelay.c
> > +++ b/libavfilter/af_adelay.c
> > @@ -155,7 +155,10 @@ static int config_input(AVFilterLink *inlink)
> >          ret = av_sscanf(arg, "%d%c", &d->delay, &type);
> >          if (ret != 2 || type != 'S') {
> >              div = type == 's' ? 1.0 : 1000.0;
> > -            av_sscanf(arg, "%f", &delay);
> > +            if (av_sscanf(arg, "%f", &delay) != 1) {
> 
> > +                av_log(ctx, AV_LOG_ERROR, "Invalid syntax.\n");
> 
> I suggest to print the part of the string that is invalid.
> This would make it easier to the user to know where the error is

Fixed and update, thx.

> 
> thx
> 
> [...]
> -- 
> Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
> 
> No human being will ever know the Truth, for even if they happen to say it
> by chance, they would not even known they had done so. -- Xenophanes



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-- 
Thanks,
Limin Wang