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:   Fri, 27 May 2022 11:12:59 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     "Chen, Guchun" <Guchun.Chen@....com>
Cc:     "kbuild@...ts.01.org" <kbuild@...ts.01.org>,
        "Deucher, Alexander" <Alexander.Deucher@....com>,
        "kbuild-all@...ts.01.org" <kbuild-all@...ts.01.org>,
        "lkp@...el.com" <lkp@...el.com>,
        "amd-gfx@...ts.freedesktop.org" <amd-gfx@...ts.freedesktop.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
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 Fri, May 27, 2022 at 07:56:48AM +0000, Chen, Guchun wrote:
> A patch was available already to protect against such scenario.
> 
> https://patchwork.freedesktop.org/patch/486289/ , "drm/amdgpu/discovery: validate VCN and SDMA instances"
> 

What?  That's an unrelated patch and it has already been applied so I
took it into consideration when doing my analysis.

regards,
dan carpenter