netdev - Re: [PATCH] net: sctp: fix initialization of local source address on accepted ipv6 sockets

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Date:	Thu, 06 Feb 2014 11:13:09 +0100
From:	Daniel Borkmann <dborkman@...hat.com>
To:	Matija Glavinic Pecotic <matija.glavinic-pecotic.ext@....com>
CC:	"linux-sctp@...r.kernel.org" <linux-sctp@...r.kernel.org>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: [PATCH] net: sctp: fix initialization of local source address
 on accepted ipv6 sockets

Hi Matija,

On 02/06/2014 08:30 AM, Matija Glavinic Pecotic wrote:
> commit 	efe4208f47f907b86f528788da711e8ab9dea44d:
> 'ipv6: make lookups simpler and faster' broke initialization of local source
> address on accepted ipv6 sockets. Before the mentioned commit receive address
> was copied along with the contents of ipv6_pinfo in sctp_v6_create_accept_sk.
> Now when it is moved, it has to be copied separately.
>
> This also fixes lksctp's ipv6 regression in a sense that test_getname_v6, TC5 -
> 'getsockname on a connected server socket' now passes.
>
> Signed-off-by: Matija Glavinic Pecotic <matija.glavinic-pecotic.ext@....com>

1) What about the status of http://patchwork.ozlabs.org/patch/311958/ ? Are
    you still working on a v2?

2) There already has been some discussion in [1,2] about that issue and an
    RFC patch for net-next has been proposed in [3] for fixing it on a more
    general scope. I need to get back to that when net-next opens and when
    I'm back from the conference trip I'm right now. It's however net-next
    material for sure.

   [1] http://patchwork.ozlabs.org/patch/292245/
   [2] http://patchwork.ozlabs.org/patch/292352/
   [3] http://www.spinics.net/lists/linux-sctp/msg03089.html

Best,

Daniel

> --- net-next.orig/net/sctp/ipv6.c
> +++ net-next/net/sctp/ipv6.c
> @@ -662,6 +662,8 @@ static struct sock *sctp_v6_create_accep
>   	 */
>   	sctp_v6_to_sk_daddr(&asoc->peer.primary_addr, newsk);
>
> +	newsk->sk_v6_rcv_saddr = sk->sk_v6_rcv_saddr;
> +
>   	sk_refcnt_debug_inc(newsk);
>
>   	if (newsk->sk_prot->init(newsk)) {
> --
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