netdev - Re: [PATCH net-next] netfilter: x_tables: xt

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

Date:	Wed, 5 Sep 2012 18:53:21 +0200
From:	Pablo Neira Ayuso <pablo@...filter.org>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	Cong Wang <xiyou.wangcong@...il.com>,
	Patrick McHardy <kaber@...sh.net>,
	netfilter-devel@...r.kernel.org,
	Linux Kernel Network Developers <netdev@...r.kernel.org>
Subject: Re: [PATCH net-next] netfilter: x_tables: xt_init() should run
 earlier

Hi Eric,

On Wed, Sep 05, 2012 at 06:37:53PM +0200, Eric Dumazet wrote:
> From: Eric Dumazet <edumazet@...gle.com>
> 
> Cong Wang reported a NULL dereference in xt_register_target()
> 
> It turns out xt_nat_init() was called before xt_init(), so xt array
> was not yet setup.
> 
> xt_init() should be marked core_initcall() to solve this problem.
> 
> Reported-by: Cong Wang <xiyou.wangcong@...il.com>
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>
> ---
>  net/netfilter/x_tables.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/net/netfilter/x_tables.c b/net/netfilter/x_tables.c
> index 8d987c3..afcea11 100644
> --- a/net/netfilter/x_tables.c
> +++ b/net/netfilter/x_tables.c
> @@ -1390,6 +1390,6 @@ static void __exit xt_fini(void)
>  	kfree(xt);
>  }
>  
> -module_init(xt_init);
> +core_initcall(xt_init);
>  module_exit(xt_fini);

It seems we've clashed fixing this, sorry. Can you still see any
problem with my patch?

Thanks for looking into this.
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html