Merge: sctp: stable backport for 9.8 phase 2

MR: https://gitlab.com/redhat/centos-stream/src/kernel/centos-stream-9/-/merge_requests/7418

JIRA: https://issues.redhat.com/browse/RHEL-115641

This MR backports important fixes from upstream for RHEL-9.8.

Signed-off-by: Xin Long <lxin@redhat.com>

Approved-by: Guillaume Nault <gnault@redhat.com>
Approved-by: Paolo Abeni <pabeni@redhat.com>
Approved-by: CKI KWF Bot <cki-ci-bot+kwf-gitlab-com@redhat.com>

Merged-by: CKI GitLab Kmaint Pipeline Bot <26919896-cki-kmaint-pipeline-bot@users.noreply.gitlab.com>

Author: CKI KWF Bot

net/sctp/ipv6.c

@@ -547,7 +547,9 @@ static void sctp_v6_from_sk(union sctp_addr *addr, struct sock *sk)
 {
 	addr->v6.sin6_family = AF_INET6;
 	addr->v6.sin6_port = 0;
+	addr->v6.sin6_flowinfo = 0;
 	addr->v6.sin6_addr = sk->sk_v6_rcv_saddr;
+	addr->v6.sin6_scope_id = 0;
 }
 
 /* Initialize sk->sk_rcv_saddr from sctp_addr. */

net/sctp/socket.c

@@ -9100,7 +9100,8 @@ static void __sctp_write_space(struct sctp_association *asoc)
 		wq = rcu_dereference(sk->sk_wq);
 		if (wq) {
 			if (waitqueue_active(&wq->wait))
-				wake_up_interruptible(&wq->wait);
+				wake_up_interruptible_poll(&wq->wait, EPOLLOUT |
+						EPOLLWRNORM | EPOLLWRBAND);
 
 			/* Note that we try to include the Async I/O support
 			 * here by modeling from the current TCP/UDP code.