linux-kernel - Re: [PATCH] Gpu: drm: tegra - Fix possible NULL derefrence.

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Message-ID: <20170130071112.GF3585@ulmo.ba.sec>
Date:   Mon, 30 Jan 2017 08:11:12 +0100
From:   Thierry Reding <thierry.reding@...il.com>
To:     Shailendra Verma <shailendra.v@...sung.com>
Cc:     David Airlie <airlied@...ux.ie>,
        Stephen Warren <swarren@...dotorg.org>,
        Alexandre Courbot <gnurou@...il.com>,
        dri-devel@...ts.freedesktop.org, linux-tegra@...r.kernel.org,
        linux-kernel@...r.kernel.org, p.shailesh@...sung.com,
        ashish.kalra@...sung.com,
        Shailendra Verma <shailendra.capricorn@...il.com>
Subject: Re: [PATCH] Gpu: drm: tegra - Fix possible NULL derefrence.

On Mon, Jan 30, 2017 at 10:23:45AM +0530, Shailendra Verma wrote:
> of_match_device could return NULL, and so can cause a NULL
> pointer dereference later.
> 
> Signed-off-by: Shailendra Verma <shailendra.v@...sung.com>
> ---
>  drivers/gpu/drm/tegra/sor.c |    4 ++++
>  1 file changed, 4 insertions(+)

No, this will never happen on Tegra. If you reach the ->probe() function
this pointer is guaranteed to be non-NULL.

Thierry

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