linux-kernel - Re: [PATCH 1/3] gpio: 74xx: fix a possible NULL dereference

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Message-ID: <CACRpkdZGrx3U8hB8QV3zpdR-8Sx4pphjDsmXfBpXbt66F-03sg@mail.gmail.com>
Date:	Mon, 30 Nov 2015 13:08:16 +0100
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:	LABBE Corentin <clabbe.montjoie@...il.com>,
	Alexandre Courbot <gnurou@...il.com>,
	"linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/3] gpio: 74xx: fix a possible NULL dereference

On Fri, Nov 20, 2015 at 10:22 AM, Geert Uytterhoeven
<geert@...ux-m68k.org> wrote:
> On Wed, Nov 11, 2015 at 9:27 PM, LABBE Corentin
> <clabbe.montjoie@...il.com> wrote:
>> of_match_device could return NULL, and so cause a NULL pointer
>> dereference later at line 132:
>> priv->flags = (uintptr_t) of_id->data;
>>
>> Reported-by: coverity (CID 1324141)
>
> This is a DT-only driver, hence this cannot happen?

Yeah I said the same in comment to some other patch in the
series. But it doesn't hurt much either. Coccinelle has no clue
about deeper semantics, just shallow semantics.

Yours,
Linus Walleij
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