linux-kernel - Re: [PATCH v2 02/13] PCI: prevent duplicate slot names

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Message-ID: <20080922224232.GB27204@parisc-linux.org>
Date:	Mon, 22 Sep 2008 16:42:32 -0600
From:	Matthew Wilcox <matthew@....cx>
To:	Alex Chiang <achiang@...com>, linux-pci@...r.kernel.org,
	linux-kernel@...r.kernel.org, jbarnes@...tuousgeek.org,
	kristen.c.accardi@...el.com, kaneshige.kenji@...fujitsu.com
Subject: Re: [PATCH v2 02/13] PCI: prevent duplicate slot names

On Mon, Sep 22, 2008 at 03:38:45PM -0600, Alex Chiang wrote:
> As Rolf Eike Beer pointed out, a failed krealloc() will leak the
> old version of new_name, so I did this instead:
> 
> 			kfree(new_name);
> 			new_name = kmalloc(len, GFP_KERNEL);
> 
> This is better than krealloc() in several ways:
> 
> 	1. we avoid the unneeded memcpy that krealloc() does for
> 	us. we don't need it because we're going to sprintf over
> 	it anyway.
> 
> 	2. the explicit kfree(new_name) means we won't leak
> 	anything.

Agreed.

-- 
Matthew Wilcox				Intel Open Source Technology Centre
"Bill, look, we understand that you're interested in selling us this
operating system, but compare it to ours.  We can't possibly take such
a retrograde step."
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