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

[Julian Anastasov <ja@xxxxxx>]

        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@xxxxxxxxxxx>

        Looks good to me, thanks!

Acked-by: Julian Anastasov <ja@xxxxxx>

> ---
> 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@xxxxxx>