linux-kernel - Re: [kbuild] drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c:1433 amdgpu_discovery_get_vcn_info() error: buffer overflow 'adev->vcn.vcn_codec_disable

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <CADnq5_PucdB0D0o0oGUbh+CziYgNqRX+mReTpNDO-ZbsLUEFGg@mail.gmail.com>
Date:   Thu, 2 Jun 2022 11:44:09 -0400
From:   Alex Deucher <alexdeucher@...il.com>
To:     Dan Carpenter <dan.carpenter@...cle.com>
Cc:     Ernst Sjöstrand <ernstp@...il.com>,
        kbuild-all@...ts.01.org, kernel test robot <lkp@...el.com>,
        kbuild@...ts.01.org, LKML <linux-kernel@...r.kernel.org>,
        amd-gfx list <amd-gfx@...ts.freedesktop.org>,
        Alex Deucher <alexander.deucher@....com>
Subject: Re: [kbuild] drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c:1433
 amdgpu_discovery_get_vcn_info() error: buffer overflow 'adev->vcn.vcn_codec_disable_mask'
 2 <= 3

On Thu, Jun 2, 2022 at 11:33 AM Dan Carpenter <dan.carpenter@...cle.com> wrote:
>
> On Thu, Jun 02, 2022 at 10:24:58AM -0400, Alex Deucher wrote:
> > On Thu, Jun 2, 2022 at 7:51 AM Dan Carpenter <dan.carpenter@...cle.com> wrote:
> > >
> > > On Thu, Jun 02, 2022 at 08:26:03AM +0200, Ernst Sjöstrand wrote:
> > > > Dan: I also ran Smatch which resulted in the following discussion:
> > > >
> > > > https://lists.freedesktop.org/archives/amd-gfx/2022-May/079228.html
> > >
> > > Since the bounds check is dead code which does not make sense and is not
> > > required, another idea would be to just delete it.
> >
> > It wouldn't be dead code if AMDGPU_MAX_VCN_INSTANCES ever increased.
>
> Or we could add a comment to the code I suppose.
>
>         /* Impossible in 2022 but this check might sense in the future */

Good idea.  I'll send out a patch.

Thanks,

Alex

>
> regards,
> dan carpenter
>