From: wangweidong <wangweidong1@huawei•com>
To: <davem@davemloft•net>, <gerrit@erg•abdn.ac.uk>,
<kuznet@ms2•inr.ac.ru>, <jmorris@namei•org>,
<yoshfuji@linux-ipv6•org>, <kaber@trash•net>,
<vyasevich@gmail•com>, <nhorman@tuxdriver•com>,
<dccp@vger•kernel.org>, <netdev@vger•kernel.org>,
<linux-sctp@vger•kernel.org>, <dingtianhong@huawei•com>
Subject: Re: [PATCH 2/2] ipv6: use sk_v6_copy_addrs when memcpy struct ipv6_pinfo
Date: Tue, 19 Nov 2013 11:32:45 +0800 [thread overview]
Message-ID: <528ADBDD.9040209@huawei.com> (raw)
In-Reply-To: <20131119031408.GQ16541@order.stressinduktion.org>
On 2013/11/19 11:14, Hannes Frederic Sowa wrote:
> On Tue, Nov 19, 2013 at 10:47:27AM +0800, Wang Weidong wrote:
>> diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
>> index 0740f93..83d011e 100644
>> --- a/net/ipv6/tcp_ipv6.c
>> +++ b/net/ipv6/tcp_ipv6.c
>> @@ -1116,6 +1116,10 @@ static struct sock * tcp_v6_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
>> newtp = tcp_sk(newsk);
>>
>> memcpy(newnp, np, sizeof(struct ipv6_pinfo));
>> + /* Don't forget copy the rcv_saddr and daddr when
>> + * copy ipv6_pinfo.
>> + */
>> + sk_v6_copy_addrs(newsk, sk);
>>
>> ipv6_addr_set_v4mapped(newinet->inet_daddr, &newsk->sk_v6_daddr);
>>
>
> Hmm, how did you spot this?
>
> Greetings,
>
> Hannes
>
When I did the lksctp-tools(1.0.15)/src/func_tests/test_getname_v6, I got a Segmentation fault.
So I try to resolve it. I found the sctp_accept will call sctp_v6_create_accept_sk in IPV6,
the function will memcpy the ipv6_pinfo, and not copy the sk_v6_rcv_saddr. But the getsockname
will read the sk_v6_rcv_saddr, and the value is not true.
>
> .
>
next prev parent reply other threads:[~2013-11-19 3:33 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-19 2:47 [PATCH 0/2] ipv6: fix the missing copies when memcpy ipv6_pinfo Wang Weidong
2013-11-19 2:47 ` [PATCH 1/2] ipv6: add helper function for copy addrs from old sock Wang Weidong
2013-11-19 2:47 ` [PATCH 2/2] ipv6: use sk_v6_copy_addrs when memcpy struct ipv6_pinfo Wang Weidong
2013-11-19 3:14 ` Hannes Frederic Sowa
2013-11-19 3:32 ` wangweidong [this message]
2013-11-19 3:58 ` Eric Dumazet
2013-11-19 4:00 ` Eric Dumazet
2013-11-19 4:44 ` wangweidong
2013-11-19 11:35 ` Daniel Borkmann
2013-11-19 14:23 ` Eric Dumazet
2013-11-19 14:26 ` Daniel Borkmann
2013-11-19 15:25 ` Vlad Yasevich
2013-11-19 11:04 ` Daniel Borkmann
2013-11-19 11:09 ` wangweidong
2013-11-19 3:55 ` Eric Dumazet
2013-11-19 4:38 ` wangweidong
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