linux-kernel - Re: Don't leak 'listeners' in netlink_kernel

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

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();
>  
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/