linux-kernel - Re: [Patch 9/9] fs/exec.c: fix a wrong goto path

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Message-ID: <20080512035819.GM13907@ZenIV.linux.org.uk>
Date:	Mon, 12 May 2008 04:58:19 +0100
From:	Al Viro <viro@...IV.linux.org.uk>
To:	WANG Cong <xiyou.wangcong@...il.com>
Cc:	LKML <linux-kernel@...r.kernel.org>, Andrew Morton <akpm@...l.org>,
	WANG Cong <wangcong@...ux.org>
Subject: Re: [Patch 9/9] fs/exec.c: fix a wrong goto path

On Mon, May 12, 2008 at 11:51:51AM +0800, WANG Cong wrote:
> On Sat, May 10, 2008 at 08:37:01PM +0100, Al Viro wrote:
> >On Thu, May 08, 2008 at 09:52:34PM +0800, WANG Cong wrote:
> >> When nameidata_to_filp() fails, I see no reasons to fall into 'out' path
> >> where doesn't free any resources at all.
> >
> >How about "nameidata_to_filp() frees on failure"?
> 
> When it fails, it should free the resources that were allocated before it.
> That's to say, it should goto 'exit' on failure.
> 
> Am I missing something obvious?

Yes.  Take a look at the things dealt with at exit.  Then look at what
nameidata_to_filp() does on failure.
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