netdev - Re: Don't leak 'listeners' in netlink_kernel

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Message-ID: <m1hckt5nyp.fsf@ebiederm.dsl.xmission.com>
Date:	Sun, 14 Oct 2007 16:30:06 -0600
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	Jesper Juhl <jesper.juhl@...il.com>
Cc:	netdev@...r.kernel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Alan Cox <alan@...hat.com>,
	Alexey Kuznetsov <kuznet@....inr.ac.ru>,
	David Miller <davem@...emloft.net>
Subject: Re: Don't leak 'listeners' in netlink_kernel_create()

Jesper Juhl <jesper.juhl@...il.com> writes:

> From: Jesper Juhl <jesper.juhl@...il.com>
> Subject: Don't leak 'listeners' in netlink_kernel_create()
>
> The Coverity checker spotted that we'll leak the storage allocated 
> to 'listeners' in netlink_kernel_create() when the
>   if (!nl_table[unit].registered)
> check is false.
>
> This patch avoids the leak.
>
>
> Signed-off-by: Jesper Juhl <jesper.juhl@...il.com>

This patch appears trivially correct to me.
Acked-by: "Eric W. Biederman" <ebiederm@...ssion.com>

> ---
>
>  af_netlink.c |    2 ++
>  1 file changed, 2 insertions(+)
>
> --- linux-2.6/net/netlink/af_netlink.c~	2007-10-14 23:29:50.000000000 +0200
> +++ linux-2.6/net/netlink/af_netlink.c	2007-10-14 23:29:50.000000000 +0200
> @@ -1378,6 +1378,8 @@ netlink_kernel_create(struct net *net, i
>  		nl_table[unit].cb_mutex = cb_mutex;
>  		nl_table[unit].module = module;
>  		nl_table[unit].registered = 1;
> +	} else {
> +		kfree(listeners);
>  	}
>  	netlink_table_ungrab();
>  
-
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