Subject: [PATCH 10/17] sctp: check assoc before SCTP_ADDR_{MADE_PRIM, ADDED} event

From: Jonas Falkevik <[email-masked]>
Date: Wed, 27 May 2020 11:56:40 +0200

[ Upstream commit 45ebf73ebcec88a34a778f5feaa0b82b1c76069e ]

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 <[email-masked]>
Acked-by: Marcelo Ricardo Leitner <[email-masked]>
Reviewed-by: Xin Long <[email-masked]>
Signed-off-by: David S. Miller <[email-masked]>
---
 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);
 
-- 
2.26.2