linux-kernel - Re: [PATCH] drm/fb-helper: Fix potential NULL pointer dereference

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Message-ID: <20171206110727.Horde.GHd9NQbELyLB7lD0AM2LTxe@gator4166.hostgator.com>
Date:   Wed, 06 Dec 2017 11:07:27 -0600
From:   "Gustavo A. R. Silva" <garsilva@...eddedor.com>
To:     Daniel Vetter <daniel@...ll.ch>
Cc:     Daniel Vetter <daniel.vetter@...el.com>,
        Jani Nikula <jani.nikula@...ux.intel.com>,
        Gustavo Padovan <gustavo@...ovan.org>,
        Sean Paul <seanpaul@...omium.org>,
        David Airlie <airlied@...ux.ie>, linux-kernel@...r.kernel.org,
        dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH] drm/fb-helper: Fix potential NULL pointer dereference


Quoting Daniel Vetter <daniel@...ll.ch>:

> On Tue, Dec 05, 2017 at 11:46:28AM -0600, Gustavo A. R. Silva wrote:
>> fb_helper is being dereferenced before it is null checked,
>> hence there is a potential null pointer dereference.
>>
>> Fix this by moving the pointer dereference after fb_helper
>> has been null checked.
>>
>> This issue was detected with the help of Coccinelle.
>>
>> Fixes: c777990fb45b ("drm/fb-helper: Handle function NULL argument")
>> Signed-off-by: Gustavo A. R. Silva <garsilva@...eddedor.com>
>
> Oops. Applied to drm-misc-next, thanks for your patch.
> -Daniel
>

Glad to help. :)

Thanks
--
Gustavo A. R. Silva