linux-kernel - Re: [patch] power: battery: pointer math issue in gab

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Message-ID: <20120930070646.GO4587@mwanda>
Date:	Sun, 30 Sep 2012 10:06:46 +0300
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	anish kumar <anish198519851985@...il.com>
Cc:	Anton Vorontsov <cbou@...l.ru>,
	David Woodhouse <dwmw2@...radead.org>,
	linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: Re: [patch] power: battery: pointer math issue in gab_probe()

On Sun, Sep 30, 2012 at 09:38:45AM +0530, anish kumar wrote:
> On Sat, 2012-09-29 at 10:13 +0300, Dan Carpenter wrote:
> > psy->properties is an enum (32 bit type) so adding sizeof() puts us
> > four times further along than we intended.  It should be cast to a char
> > pointer before doing the math.
> You really read this driver to find out this one.
> Good one.

Nah.  It's a static checker thing with Smatch
(http://smatch.sf.net).  When you add pointer + sizeof(), the
pointer should always be char.

regards,
dan carpenter

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