linux-kernel - Re: [PATCH] vfs: use kstrdup()

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Message-ID: <20080721083509.GB20011@lenovo>
Date:	Mon, 21 Jul 2008 12:35:09 +0400
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	Al Viro <viro@...IV.linux.org.uk>
Cc:	Li Zefan <lizf@...fujitsu.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] vfs: use kstrdup()

[Al Viro - Mon, Jul 21, 2008 at 09:28:57AM +0100]
| On Mon, Jul 21, 2008 at 12:04:27PM +0400, Cyrill Gorcunov wrote:
| >  		err = mnt_alloc_id(mnt);
| > -		if (err) {
| > -			kmem_cache_free(mnt_cache, mnt);
| > -			return NULL;
| > +		if (err)
| > +			goto err;
| 
| Ugh...  Labels are in a separate namespace, but really...
| 
| > +		if (name) {
| > +			mnt->mnt_devname = kstrdup(name, GFP_KERNEL);
| > +			if (!mnt->mnt_devname)
| > +				goto err;
| 
| > +err:
| > +	kmem_cache_free(mnt_cache, mnt);
| > +	return NULL;
| 
| Leak; note the mnt_alloc_id() above.  Either do that kstrdup() first and
| kfree the result on mnt_alloc_id() failure or do mnt_free_id() on kstrdup()
| one...
| 

oh my, that stupid from my side - will update shortly

		- Cyrill -
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