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

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Message-ID: <52F36881.1030600@nsn.com>
Date:	Thu, 06 Feb 2014 11:48:33 +0100
From:	Matija Glavinic Pecotic <matija.glavinic-pecotic.ext@....com>
To:	ext Daniel Borkmann <dborkman@...hat.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

Hello Daniel,

On 02/06/2014 11:13 AM, ext Daniel Borkmann wrote:
> 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?

of course, but as I mentioned, patch breaks regression. I can justify that, but I need to fix those broken TCs. This one got in a way while doing that. I'm also a bit busy lately so thats why I'm slower on that one.

> 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.

yes, that one seems to be better solution.

Regards,

Matija

>   [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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