[FFmpeg-devel] [PATCH] libavcodec/vp9: fix ref-frame size judging method

[严小复]

Hi, Ronald



Sorry to reply late.



For you question, “we lack per-block reference validity checks in the
block reconstruction
code”, I'm little confused about the red word,would you mean encode process
need validity checks or there need to check the reference id of each frame?

And this patch will act on decode process, all references have already been
appointed by the stream.



Br

Cen

Ronald S. Bultje <rsbultje at gmail.com> 于2019年5月1日周三 上午7:19写道：

> Hi,
>
> On Mon, Apr 29, 2019 at 10:03 PM Yan Cen <mryancen at gmail.com> wrote:
>
> > From: Yan Cen <cenx.yan at intel.com>
> >
> > There is no need all reference frame demension is valid in libvpx.
>
>
> I think you're touching on a bigger issue here: libvpx allows having
> invalid (or even missing) references, and we don't. Note that this means we
> lack per-block reference validity checks in the block reconstruction code,
> and your patch is not adding them, thus exposing us to potential security
> issues there.
>
> Ronald
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