linux-kernel - Re: [PATCH] scsi: ses check name in enclosure_component

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Message-Id: <1240964289.3380.73.camel@mulgrave.int.hansenpartnership.com>
Date:	Wed, 29 Apr 2009 00:18:09 +0000
From:	James Bottomley <James.Bottomley@...senPartnership.com>
To:	Yinghai Lu <yinghai@...nel.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Kay Sievers <kay.sievers@...y.org>, Greg KH <gregkh@...e.de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Linux-Scsi <linux-scsi@...r.kernel.org>
Subject: Re: [PATCH] scsi: ses check name in enclosure_component_register

On Tue, 2009-04-28 at 16:56 -0700, Yinghai Lu wrote:
> James Bottomley wrote:
> > On Mon, 2009-04-27 at 19:18 -0700, Yinghai Lu wrote:
> >> dev_set_name will use sprintf to copy the name.
> >> need to check if the name does valid.
> >>
> >> otherwise will error from device_add later.
> > 
> > I think what you mean to say is that empty names aren't allowed in the
> > device model.
> > 
> >> Signed-off-by: Yinghai Lu <yinghai@...nel.org>
> >>
> >> diff --git a/drivers/misc/enclosure.c b/drivers/misc/enclosure.c
> >> index 3cf61ec..68743a9 100644
> >> --- a/drivers/misc/enclosure.c
> >> +++ b/drivers/misc/enclosure.c
> >> @@ -255,7 +255,7 @@ enclosure_component_register(struct enclosure_device *edev,
> >>  	ecomp->number = number;
> >>  	cdev = &ecomp->cdev;
> >>  	cdev->parent = get_device(&edev->edev);
> >> -	if (name)
> >> +	if (name && name[0])
> >>  		dev_set_name(cdev, name);
> > 
> > Actually, I think this should become
> > 
> > dev_set_name(cdev, "%s", name);
> > 
> > as well, otherwise any name with a percent in it will get interpreted in
> > ways we're not expecting at all.
> 
> i tried that it still failed.

I didn't say it was the fix to your problem.  I said on looking at the
code it's another potential problem source.  Your problem is that
filesystems don't support empty file names.

James


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