From 8f5f6680efa28135bf37f3def2aa71f35bd30333 Mon Sep 17 00:00:00 2001
From: Michael Tuexen <tuexen@FreeBSD.org>
Date: Mon, 5 May 2025 00:28:52 +0200
Subject: [PATCH] sctp: don't report unusable addresses via sysctl interface

When reporting the local addresses of an endpoint (inp without
stcb), ignore unusable addresses.

MFC after:	3 days
---
 sys/netinet/sctp_sysctl.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/sys/netinet/sctp_sysctl.c b/sys/netinet/sctp_sysctl.c
index a39429ec046..bd2f23f4072 100644
--- a/sys/netinet/sctp_sysctl.c
+++ b/sys/netinet/sctp_sysctl.c
@@ -265,6 +265,10 @@ sctp_sysctl_copy_out_local_addresses(struct sctp_inpcb *inp, struct sctp_tcb *st
 					if (sctp_is_addr_restricted(stcb, sctp_ifa)) {
 						continue;
 					}
+				} else {
+					if (sctp_ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
+						continue;
+					}
 				}
 				switch (sctp_ifa->address.sa.sa_family) {
 #ifdef INET