linux-kernel - Re: [PATCH 02/04] s390: bus_id -> dev_set

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Date:	Thu, 3 Jul 2008 09:07:22 +0200
From:	Cornelia Huck <cornelia.huck@...ibm.com>
To:	Greg KH <greg@...ah.com>
Cc:	Anton Vorontsov <cbouatmailru@...il.com>, schwidefsky@...ibm.com,
	heiko.carstens@...ibm.com, linux390@...ibm.com,
	Kay Sievers <kay.sievers@...y.org>, linux-s390@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 02/04] s390: bus_id -> dev_set_name() changes

On Wed, 2 Jul 2008 16:07:42 -0700,
Greg KH <greg@...ah.com> wrote:

> On Thu, Jul 03, 2008 at 02:14:01AM +0400, Anton Vorontsov wrote:
> > On Wed, Jul 02, 2008 at 08:48:11AM -0700, Greg KH wrote:
> > > --- a/drivers/s390/block/dcssblk.c
> > > +++ b/drivers/s390/block/dcssblk.c
> > > @@ -349,7 +349,7 @@ dcssblk_add_store(struct device *dev, st
> > >  	}
> > >  
> > >  	strcpy(dev_info->segment_name, local_buf);
> > > -	strlcpy(dev_info->dev.bus_id, local_buf, BUS_ID_SIZE);
> > > +	dev_set_name(&dev_info->dev, local_buf);
> > 
> > As I see it, dev_set_name accepts printf like string, so this
> > dev_set_name is quite dangerous (since local_buf is formed
> > by the module param), no?
> 
> So you would rather see:
> 	dev_set_name(&dev_info->dev, "%s", local_buf);
> 
> instead?

Hm, I thought the string had already been sanitized at that time, but
looking again it doesn't do many checks... so this looks better.
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