linux-kernel - Re: [PATCH v2] sctp: check assoc before SCTP_ADDR_{MADE

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Message-ID: <20200527221035.GB47547@localhost.localdomain>
Date:   Wed, 27 May 2020 19:10:35 -0300
From:   Marcelo Ricardo Leitner <marcelo.leitner@...il.com>
To:     Jonas Falkevik <jonas.falkevik@...il.com>
Cc:     lucien.xin@...il.com, nhorman@...driver.com, vyasevich@...il.com,
        davem@...emloft.net, kuba@...nel.org, linux-sctp@...r.kernel.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] sctp: check assoc before SCTP_ADDR_{MADE_PRIM,ADDED}
 event

On Wed, May 27, 2020 at 11:56:40AM +0200, Jonas Falkevik wrote:
> Make sure SCTP_ADDR_{MADE_PRIM,ADDED} are sent only for associations
> that have been established.
> 
> These events are described in rfc6458#section-6.1
> SCTP_PEER_ADDR_CHANGE:
> This tag indicates that an address that is
> part of an existing association has experienced a change of
> state (e.g., a failure or return to service of the reachability
> of an endpoint via a specific transport address).
> 
> Signed-off-by: Jonas Falkevik <jonas.falkevik@...il.com>

Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@...il.com>
Thanks!

> ---
> Changes in v2:
>  - Check asoc state to be at least established.
>    Instead of associd being SCTP_FUTURE_ASSOC.
>  - Common check for all peer addr change event
> 
>  net/sctp/ulpevent.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/net/sctp/ulpevent.c b/net/sctp/ulpevent.c
> index c82dbdcf13f2..77d5c36a8991 100644
> --- a/net/sctp/ulpevent.c
> +++ b/net/sctp/ulpevent.c
> @@ -343,6 +343,9 @@ void sctp_ulpevent_nofity_peer_addr_change(struct sctp_transport *transport,
>  	struct sockaddr_storage addr;
>  	struct sctp_ulpevent *event;
>  
> +	if (asoc->state < SCTP_STATE_ESTABLISHED)
> +		return;
> +
>  	memset(&addr, 0, sizeof(struct sockaddr_storage));
>  	memcpy(&addr, &transport->ipaddr, transport->af_specific->sockaddr_len);
>  
> -- 
> 2.25.4
>