linux-kernel - Re: [PATCH] kobject_set_name

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Date:	Sun, 28 Jun 2009 16:40:15 +0300
From:	Sergey Senozhatsky <sergey.senozhatsky@...l.by>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
Cc:	Kay Sievers <kay.sievers@...y.org>, Greg KH <gregkh@...e.de>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] kobject_set_name_vargs memory leak

On (06/28/09 05:07), Eric W. Biederman wrote:
> Date: Sun, 28 Jun 2009 05:07:10 -0700
> From: "Eric W. Biederman" <ebiederm@...ssion.com>
> To: Kay Sievers <kay.sievers@...y.org>
> Cc: Sergey Senozhatsky <sergey.senozhatsky@...l.by>,
> 	Greg KH <gregkh@...e.de>, linux-kernel@...r.kernel.org
> Subject: Re: [PATCH] kobject_set_name_vargs memory leak
> User-Agent: Gnus/5.11 (Gnus v5.11) Emacs/22.2 (gnu/linux)
> 
> Kay Sievers <kay.sievers@...y.org> writes:
> 
> > On Sat, 2009-06-27 at 12:39 +0300, Sergey Senozhatsky wrote:
> >
> >> > >> Or something along those lines, I can't remember the exact reasoning
> >> > >> this early in the morning.
> >> > >> 
> >> > >> Kay, do you remember?
> > [....]
> > Hmm, yes, I think there was only something to work around during the
> > transition from the static name array, which is gone now. At least I
> > can't see anything we need to care about with the current code.
> >
> > I guess, that would leak an allocated name, when it is set several times
> > in a row? Something like this?
> 
> But setting a kobject's name several times in a row is a bug.  You
> need to call kobject_rename if you are going to change the name.
> 
Yes.

> So how about we fix the driver core not to do that.  Stop treating fmt
> as a flag, and make it clear kobject_add should not be passed a name.
> 
Sounds good.

	Sergey
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