From ea619f17048ed6b3e7cf730901e7bc27c1f3f7ed Mon Sep 17 00:00:00 2001
From: Neels Hofmeyr <nhofmeyr@sysmocom.de>
Date: Fri, 16 Dec 2016 13:09:00 +0100
Subject: [PATCH] gtphub: fix possible NULL deref: don't print NULL tunnel

Fixes: coverity CID#158302
Change-Id: Ic500a3eb0c49393c7962a20e61eb57fd467208d3
---
 openbsc/src/gprs/gtphub.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/openbsc/src/gprs/gtphub.c b/openbsc/src/gprs/gtphub.c
index 58300ea13..a0af42bee 100644
--- a/openbsc/src/gprs/gtphub.c
+++ b/openbsc/src/gprs/gtphub.c
@@ -1039,6 +1039,9 @@ const char *gtphub_tunnel_str(struct gtphub_tunnel *tun)
 	int left = sizeof(buf);
 	int l;
 
+	if (!tun)
+		return "null-tunnel";
+
 	APPEND("TEI=%x: ", tun->tei_repl);
 	APPEND("%s", gtphub_tunnel_side_str(tun, GTPH_SIDE_SGSN));
 	APPEND(" <-> %s", gtphub_tunnel_side_str(tun, GTPH_SIDE_GGSN));