linux-kernel - Re: [PATCH] drm/i915/display: fix missing null check on allocated dsb object

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Message-ID: <20200616115459.GN4151@kadam>
Date:   Tue, 16 Jun 2020 14:54:59 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Colin King <colin.king@...onical.com>
Cc:     Jani Nikula <jani.nikula@...ux.intel.com>,
        Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Animesh Manna <animesh.manna@...el.com>,
        Maarten Lankhorst <maarten.lankhorst@...el.com>,
        intel-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/i915/display: fix missing null check on allocated
 dsb object

On Tue, Jun 16, 2020 at 12:42:21PM +0100, Colin King wrote:
> From: Colin Ian King <colin.king@...onical.com>
> 
> Currently there is no null check for a failed memory allocation
> on the dsb object and without this a null pointer dereference
> error can occur. Fix this by adding a null check.
> 
> Note: added a drm_err message in keeping with the error message style
> in the function.

Don't give in to peer pressure!  That's like being a lemming when Disney
film makers come to push you off the cliff to create the 1958 nature
film "White Wilderness".

regards,
dan carpenter