[FFmpeg-devel] [PATCH V1 2/4] lavc/hevcdec: fix the HEVC decoder crash when memory over-read

[mypopy at gmail.com]

On Sat, Apr 11, 2020 at 10:48 PM Carl Eugen Hoyos <ceffmpeg at gmail.com> wrote:
>
> Am Sa., 11. Apr. 2020 um 16:24 Uhr schrieb mypopy at gmail.com <mypopy at gmail.com>:
> >
> > On Mon, Mar 30, 2020 at 4:52 PM mypopy at gmail.com <mypopy at gmail.com> wrote:
> > >
> > > On Mon, Mar 30, 2020 at 4:31 PM Jun Zhao <mypopydev at gmail.com> wrote:
> > > >
> > > > From: qoroliang <qoroliang at tencent.com>
> > > >
> > > > Fix an occasional crash for hevc decoder in ARM 64 platform, the
> > >                           typo: it's ARM 32 bits platform, not 64,
> > > fixed in local
> > > > root cause is the memory over read(read cross the memory boundary)
> > > > in SAO NENO functions ff_hevc_sao_band_filter_neon_8 and
> > > > ff_hevc_sao_edge_filter_neon_8.
> > > >
> > > > After this fix, the crash disapper in the massive Android phone
> > > > test.
> > > >
> > Ping,  this issue will lead to some crash in ARM device, so pls help
> > to review the fix, thx.
>
> Is there a sample that allows to reproduce?
>

In fact, this is a probabilistic problem, we can only find this
problem in large-scale product testing, and catch the coredump in a
small number of Android mobile phones

> Carl Eugen