linux-kernel - Re: [PATCH] drm/amdgpu: Fix NULL pointer dereference

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Message-ID: <QfKpxmkE_cy9wt5VJruw_TSdnl5KceKM8BxJGmZSBs-KiaRwIYfgc8h_-5h7Wmj6G-NtUJ3A88V5pzPvZuLlpkK-oRO5pSjeTxwHcZWlogs=@emersion.fr>
Date:   Fri, 08 Apr 2022 11:48:09 +0000
From:   Simon Ser <contact@...rsion.fr>
To:     Bas Nieuwenhuizen <bas@...nieuwenhuizen.nl>
Cc:     Grigory Vasilyev <h0tc0d3@...il.com>,
        Rodrigo Siqueira <Rodrigo.Siqueira@....com>,
        Melissa Wen <mwen@...lia.com>,
        Alex Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>,
        "Pan, Xinhui" <Xinhui.Pan@....com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Michel Dänzer <mdaenzer@...hat.com>,
        Evan Quan <evan.quan@....com>,
        Sean Paul <seanpaul@...omium.org>,
        Qingqing Zhuo <qingqing.zhuo@....com>,
        amd-gfx mailing list <amd-gfx@...ts.freedesktop.org>,
        ML dri-devel <dri-devel@...ts.freedesktop.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] drm/amdgpu: Fix NULL pointer dereference

On Friday, April 8th, 2022 at 13:28, Bas Nieuwenhuizen <bas@...nieuwenhuizen.nl> wrote:

> On Fri, Apr 8, 2022 at 12:01 PM Simon Ser contact@...rsion.fr wrote:
>
> > Is amdgpu_display_get_fb_info ever called with NULL tiling_flags/tmz_surface?
> > If not, there's no point in adding NULL checks.
>
> It isn't called with NULL anywhere, the NULL checks that already exist
> seem redundant.

Grigory, would be be willing to submit a v2 which removes the unnecessary
NULL checks?