From 850a1a582e3fe48845355561d3ae778491a1b984 Mon Sep 17 00:00:00 2001
From: Richard Fuchs <rfuchs@sipwise.com>
Date: Thu, 6 Jul 2023 08:29:56 -0400
Subject: [PATCH] MT#57820 fix possible NULL deref

Don't attempt to send packets to an endpoint address that is empty and
hasn't been initialised.

Change-Id: Iabeb034ebfc56fc49083c6a10a85b92c6983eebc
---
 daemon/dtls.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/daemon/dtls.c b/daemon/dtls.c
index a40dfd5ad..ae530c57b 100644
--- a/daemon/dtls.c
+++ b/daemon/dtls.c
@@ -864,7 +864,7 @@ int dtls(struct stream_fd *sfd, const str *s, const endpoint_t *fsin) {
 
 		if (!fsin) {
 			fsin = &ps->endpoint;
-			if (fsin->port == 9)
+			if (fsin->port == 9 || fsin->address.family == NULL)
 				fsin = NULL;
 		}