From: Joshua Colp <jcolp@digium.com>
Date: Thu, 11 Jan 2018 18:05:05 +0000 (-0500)
Subject: chan_sip: Check that an iostream exists before accessing.
X-Git-Tag: 16.0.0-rc1~429^2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6d5f4768a4f1e50099201b22948926f957ee715c;p=thirdparty%2Fasterisk.git

chan_sip: Check that an iostream exists before accessing.

Before getting the file descriptor for an iostream check
that it is present.

ASTERISK-27534

Change-Id: Ie0aa1394007a37c30e337ea1176a6fb3a63bc99c
---

diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index e204f00539..e8cc591a30 100644
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -29450,7 +29450,7 @@ static int sip_prepare_socket(struct sip_pvt *p)
 		return s->fd;
 	}
 	if ((s->type & (AST_TRANSPORT_TCP | AST_TRANSPORT_TLS)) &&
-			s->tcptls_session) {
+			s->tcptls_session && s->tcptls_session->stream) {
 		return ast_iostream_get_fd(s->tcptls_session->stream);
 	}
 	if ((s->type & (AST_TRANSPORT_WS | AST_TRANSPORT_WSS))) {