linux-kernel - Re: [patch v2] gru: info leak in gru_get_config

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Date:	Mon, 22 Apr 2013 11:41:18 -0500
From:	Robin Holt <holt@....com>
To:	Dimitri Sivanich <sivanich@....com>
Cc:	Dan Carpenter <dan.carpenter@...cle.com>,
	Robin Holt <holt@....com>, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org, walter harms <wharms@....de>
Subject: Re: [patch v2] gru: info leak in gru_get_config_info()

Acked-by: Robin Holt <holt@....com>
On Sun, Apr 21, 2013 at 12:33:34PM -0500, Dimitri Sivanich wrote:
> Acked-by: Dimitri Sivanich <sivanich@....com>
> 
> On Sun, Apr 21, 2013 at 08:01:07PM +0300, Dan Carpenter wrote:
> > The "info.fill" array isn't initialized so it can leak uninitialized
> > stack information to user space.
> > 
> > Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
> > ---
> > v2: style changes
> > 
> > diff --git a/drivers/misc/sgi-gru/grufile.c b/drivers/misc/sgi-gru/grufile.c
> > index 44d273c..0535d1e 100644
> > --- a/drivers/misc/sgi-gru/grufile.c
> > +++ b/drivers/misc/sgi-gru/grufile.c
> > @@ -172,6 +172,7 @@ static long gru_get_config_info(unsigned long arg)
> >  		nodesperblade = 2;
> >  	else
> >  		nodesperblade = 1;
> > +	memset(&info, 0, sizeof(info));
> >  	info.cpus = num_online_cpus();
> >  	info.nodes = num_online_nodes();
> >  	info.blades = info.nodes / nodesperblade;
> --
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