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

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Message-ID: <CADvbK_duBhNhPMrR2ZGkhgAhR555MNHLQM9SS95KVZDnJ=WiQQ@mail.gmail.com>
Date:   Thu, 28 May 2020 13:59:06 +0800
From:   Xin Long <lucien.xin@...il.com>
To:     Jonas Falkevik <jonas.falkevik@...il.com>
Cc:     Marcelo Ricardo Leitner <marcelo.leitner@...il.com>,
        Neil Horman <nhorman@...driver.com>,
        Vlad Yasevich <vyasevich@...il.com>,
        davem <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>,
        linux-sctp@...r.kernel.org, network dev <netdev@...r.kernel.org>,
        LKML <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 5:57 PM Jonas Falkevik <jonas.falkevik@...il.com> 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>
Reviewed-by: Xin Long <lucien.xin@...il.com>

> ---
> 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
>