linux-kernel - Re: [PATCH] swapfile: fix name leak in swapoff

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Message-ID: <20121101060423.665cdaa2@tlielax.poochiereds.net>
Date:	Thu, 1 Nov 2012 06:04:23 -0400
From:	Jeff Layton <jlayton@...hat.com>
To:	Xiaotian Feng <xtfeng@...il.com>
Cc:	linux-kernel@...r.kernel.org,
	Xiaotian Feng <dannyfeng@...cent.com>,
	Al Viro <viro@...iv.linux.org.uk>
Subject: Re: [PATCH] swapfile: fix name leak in swapoff

On Thu,  1 Nov 2012 17:36:55 +0800
Xiaotian Feng <xtfeng@...il.com> wrote:

> there's a name leak introduced by commit 91a27b2, add the missing
> putname.
> 
> Signed-off-by: Xiaotian Feng <dannyfeng@...cent.com>
> Cc: Jeff Layton <jlayton@...hat.com>
> Cc: Al Viro <viro@...iv.linux.org.uk>
> ---
>  mm/swapfile.c |    2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/mm/swapfile.c b/mm/swapfile.c
> index 71cd288..459fe30 100644
> --- a/mm/swapfile.c
> +++ b/mm/swapfile.c
> @@ -1608,6 +1608,8 @@ SYSCALL_DEFINE1(swapoff, const char __user *, specialfile)
>  out_dput:
>  	filp_close(victim, NULL);
>  out:
> +	if (pathname && !IS_ERR(pathname))
> +		putname(pathname);
>  	return err;
>  }
>  

Nice catch.

Reviewed-by: Jeff Layton <jlayton@...hat.com>
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