[FFmpeg-devel] [libav-devel] [PATCH] vp8: Fix off by one allocation leading to oob read/write.

[Dale Curtis]

Hurm, oddly I'm unable to reproduce the problem anymore. I'll dig on this
more and update tomorrow.

- dale

On Wed, Apr 11, 2012 at 6:25 PM, Sean McGovern <gseanmcg at gmail.com> wrote:

>
>
> On Wednesday, April 11, 2012, Jason Garrett-Glaser <jason at x264.com> wrote:
> > On Wed, Apr 11, 2012 at 6:14 PM,  <dalecurtis at chromium.org> wrote:
> >> From: Dale Curtis <dalecurtis at chromium.org>
> >>
> >> It's possible this is due to an incorrect calculation elsewhere,
> >> but my expertise ran out.
> >
> > How can this be right?  top_nnz is only accessed as top_nnz[mb_x], and
> > mb_x must be < s->mb_width.
>
> Does this condition only happen on crafted files?
>
> -- Sean McG.
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