linux-kernel - Re: [PATCH v2] Fix "notes" kobject leak

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Message-ID: <20080923205640.GA17785@kroah.com>
Date:	Tue, 23 Sep 2008 13:56:40 -0700
From:	Greg KH <greg@...ah.com>
To:	Alexey Dobriyan <adobriyan@...il.com>
Cc:	Greg KH <gregkh@...e.de>, linux-kernel@...r.kernel.org,
	akpm@...l.org
Subject: Re: [PATCH v2] Fix "notes" kobject leak

On Tue, Sep 23, 2008 at 11:51:11PM +0400, Alexey Dobriyan wrote:
> > > > > --- a/kernel/module.c
> > > > > +++ b/kernel/module.c
> > > > > @@ -1174,6 +1174,7 @@ static void free_notes_attrs(struct module_notes_attrs *notes_attrs,
> > > > >  			sysfs_remove_bin_file(notes_attrs->dir,
> > > > >  					      &notes_attrs->attrs[i]);
> > > > >  		kobject_del(notes_attrs->dir);
> > > > > +		kobject_put(notes_attrs->dir);
> > > > 
> > > > Hm, no, that should just be a call to kobject_put() instead of
> > > > kobject_del(), can you try that instead and see if that solves the issue
> > > > (am at a conference and can't test that at the moment, sorry.)
> > > 
> > > Why?! kobject_del() puts parent kobject.
> > 
> > And that's about it (well, it also tears down the sysfs stuff.)
> > 
> > If you call kobject_put() instead, and it's the last put, it will also
> > call kobject_del() and do everything else that it needs to do.
> > 
> > Try it and let me know if I'm right or not :)
> 
> OK, this works too.
> 
> 
> [PATCH v2] Fix "notes" kobject leak

Great, thanks for testing, I'll apply this to my trees.

greg k-h
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