netdev - Re: [PATCH net-next v2] ipvs: properly dereference pe in ip_vs_add

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Date: Thu, 27 Jun 2024 22:09:02 +0300 (EEST)
From: Julian Anastasov <ja@....bg>
To: Chen Hanxiao <chenhx.fnst@...itsu.com>
cc: Simon Horman <horms@...ge.net.au>, Pablo Neira Ayuso <pablo@...filter.org>,
        Jozsef Kadlecsik <kadlec@...filter.org>,
        "David S . Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, netdev@...r.kernel.org,
        lvs-devel@...r.kernel.org, netfilter-devel@...r.kernel.org
Subject: Re: [PATCH net-next v2] ipvs: properly dereference pe in
 ip_vs_add_service


	Hello,

On Thu, 27 Jun 2024, Chen Hanxiao wrote:

> Use pe directly to resolve sparse warning:
> 
>   net/netfilter/ipvs/ip_vs_ctl.c:1471:27: warning: dereference of noderef expression
> 
> Fixes: 39b972231536 ("ipvs: handle connections started by real-servers")
> Signed-off-by: Chen Hanxiao <chenhx.fnst@...itsu.com>

	Looks good to me, thanks!

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

> ---
> v2:
> 	use pe directly.
> 
>  net/netfilter/ipvs/ip_vs_ctl.c | 10 +++++-----
>  1 file changed, 5 insertions(+), 5 deletions(-)
> 
> diff --git a/net/netfilter/ipvs/ip_vs_ctl.c b/net/netfilter/ipvs/ip_vs_ctl.c
> index b6d0dcf3a5c3..f4384e147ee1 100644
> --- a/net/netfilter/ipvs/ip_vs_ctl.c
> +++ b/net/netfilter/ipvs/ip_vs_ctl.c
> @@ -1459,18 +1459,18 @@ ip_vs_add_service(struct netns_ipvs *ipvs, struct ip_vs_service_user_kern *u,
>  	if (ret < 0)
>  		goto out_err;
>  
> -	/* Bind the ct retriever */
> -	RCU_INIT_POINTER(svc->pe, pe);
> -	pe = NULL;
> -
>  	/* Update the virtual service counters */
>  	if (svc->port == FTPPORT)
>  		atomic_inc(&ipvs->ftpsvc_counter);
>  	else if (svc->port == 0)
>  		atomic_inc(&ipvs->nullsvc_counter);
> -	if (svc->pe && svc->pe->conn_out)
> +	if (pe && pe->conn_out)
>  		atomic_inc(&ipvs->conn_out_counter);
>  
> +	/* Bind the ct retriever */
> +	RCU_INIT_POINTER(svc->pe, pe);
> +	pe = NULL;
> +
>  	/* Count only IPv4 services for old get/setsockopt interface */
>  	if (svc->af == AF_INET)
>  		ipvs->num_services++;
> -- 
> 2.39.1

Regards

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