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

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Date:   Thu, 2 Jun 2022 10:24:58 -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 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.

Alex

>
> regards,
> dan carpenter
>