linux-kernel - Re: [PATCH AUTOSEL 6.1 13/14] drm/amdgpu: fix dereference null return value for the function amdgpu_vm_pt

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Date: Tue, 18 Jun 2024 13:42:56 +0200
From: Christian König <christian.koenig@....com>
To: Pavel Machek <pavel@...x.de>, Sasha Levin <sashal@...nel.org>
Cc: linux-kernel@...r.kernel.org, stable@...r.kernel.org,
 Jesse Zhang <jesse.zhang@....com>, Alex Deucher <alexander.deucher@....com>,
 Xinhui.Pan@....com, airlied@...il.com, daniel@...ll.ch,
 Felix.Kuehling@....com, shashank.sharma@....com, guchun.chen@....com,
 Philip.Yang@....com, mukul.joshi@....com, xiaogang.chen@....com,
 amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH AUTOSEL 6.1 13/14] drm/amdgpu: fix dereference null return
 value for the function amdgpu_vm_pt_parent

Am 18.06.24 um 11:11 schrieb Pavel Machek:
> Hi!
>
>> [ Upstream commit a0cf36546cc24ae1c95d72253c7795d4d2fc77aa ]
>>
>> The pointer parent may be NULLed by the function amdgpu_vm_pt_parent.
>> To make the code more robust, check the pointer parent.
> If this can happen, it should not WARN().
>
> If this can not happen, we don't need the patch in stable.

Right, that patch shouldn't be backported in any way.

Regards,
Christian.

>
> Best regards,
> 							Pavel
>