netdev - Re: [PATCH nf v2] ipvs: fix AF assignment in ip_vs_conn

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Date:	Thu, 30 Jan 2014 10:29:22 +0200 (EET)
From:	Julian Anastasov <ja@....bg>
To:	Michal Kubecek <mkubecek@...e.cz>
cc:	netfilter-devel@...r.kernel.org, netdev@...r.kernel.org,
	lvs-devel@...r.kernel.org, Wensong Zhang <wensong@...ux-vs.org>,
	Simon Horman <horms@...ge.net.au>,
	Pablo Neira Ayuso <pablo@...filter.org>,
	Patrick McHardy <kaber@...sh.net>,
	Jozsef Kadlecsik <kadlec@...ckhole.kfki.hu>,
	"David S. Miller" <davem@...emloft.net>
Subject: Re: [PATCH nf v2] ipvs: fix AF assignment in ip_vs_conn_new()


	Hello,

On Thu, 30 Jan 2014, Michal Kubecek wrote:

> If a fwmark is passed to ip_vs_conn_new(), it is passed in
> vaddr, not daddr. Therefore we should set AF to AF_UNSPEC in
> vaddr assignment (like we do in ip_vs_ct_in_get()), otherwise we
> may copy only first 4 bytes of an IPv6 address into cp->daddr.
> 
> v2: fix messed up {d,v}addr and p->{d,v}addr, add info about the
> outcome (thanks to Julian Anastasov)
> 
> Signed-off-by: Bogdano Arendartchuk <barendartchuk@...e.com>
> Signed-off-by: Michal Kubecek <mkubecek@...e.cz>

Acked-by: Julian Anastasov <ja@....bg>

	Looks like problem comes from
commit be8be9eccbf2d908a7e56b3f7a71105cd88da06b
"ipvs: Fix IPv4 FWMARK virtual services" (2.6.30).

> ---
>  net/netfilter/ipvs/ip_vs_conn.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/net/netfilter/ipvs/ip_vs_conn.c b/net/netfilter/ipvs/ip_vs_conn.c
> index 59a1a85..a8eb0a8 100644
> --- a/net/netfilter/ipvs/ip_vs_conn.c
> +++ b/net/netfilter/ipvs/ip_vs_conn.c
> @@ -871,11 +871,11 @@ ip_vs_conn_new(const struct ip_vs_conn_param *p,
>  	cp->protocol	   = p->protocol;
>  	ip_vs_addr_set(p->af, &cp->caddr, p->caddr);
>  	cp->cport	   = p->cport;
> -	ip_vs_addr_set(p->af, &cp->vaddr, p->vaddr);
> -	cp->vport	   = p->vport;
> -	/* proto should only be IPPROTO_IP if d_addr is a fwmark */
> +	/* proto should only be IPPROTO_IP if p->vaddr is a fwmark */
>  	ip_vs_addr_set(p->protocol == IPPROTO_IP ? AF_UNSPEC : p->af,
> -		       &cp->daddr, daddr);
> +		       &cp->vaddr, p->vaddr);
> +	cp->vport	   = p->vport;
> +	ip_vs_addr_set(p->af, &cp->daddr, daddr);
>  	cp->dport          = dport;
>  	cp->flags	   = flags;
>  	cp->fwmark         = fwmark;
> -- 
> 1.8.1.4

Regards

--
Julian Anastasov <ja@....bg>
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