linux-kernel - Re: [PATCH] drm/debugfs: fix potential NULL pointer dereference

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Message-ID: <20231206145432.5sgkzwe7q33cjw3z@encode>
Date:   Wed, 6 Dec 2023 08:54:32 -0600
From:   Nishanth Menon <nm@...com>
To:     Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
CC:     Marek Szyprowski <m.szyprowski@...sung.com>,
        <dri-devel@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Neil Armstrong <neil.armstrong@...aro.org>
Subject: Re: [PATCH] drm/debugfs: fix potential NULL pointer dereference

On 15:19-20231205, Dmitry Baryshkov wrote:
> On Tue, 5 Dec 2023 at 15:06, Marek Szyprowski <m.szyprowski@...sung.com> wrote:
> >
> > encoder->funcs entry might be NULL, so check it first before calling its
> > methods. This fixes NULL pointer dereference observed on Rasberry Pi
> > 3b/4b boards.
> >
> > Fixes: caf525ed45b4 ("drm/encoder: register per-encoder debugfs dir")
> > Signed-off-by: Marek Szyprowski <m.szyprowski@...sung.com>
> 
> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>

Tested-by: Nishanth Menon <nm@...com>

Fixed multiple platform boot fails on TI K3 SoC family including
BeaglePlay, BeagleBone-AI64.

-- 
Regards,
Nishanth Menon
Key (0xDDB5849D1736249D) / Fingerprint: F8A2 8693 54EB 8232 17A3  1A34 DDB5 849D 1736 249D