commit ea619f17048ed6b3e7cf730901e7bc27c1f3f7ed
author Neels Hofmeyr <nhofmeyr@sysmocom.de> Fri Dec 16 13:09:00 2016 +0100
committer Neels Hofmeyr <nhofmeyr@sysmocom.de> Sun Dec 18 16:58:41 2016 +0000
tree 2710f517f0c4780d4e4e9bf8ce9044b95f754ba8
parent ecdfd6d097eb0030b1a0a003fb855b38733f9ba6

gtphub: fix possible NULL deref: don't print NULL tunnel

Fixes: coverity CID#158302
Change-Id: Ic500a3eb0c49393c7962a20e61eb57fd467208d3

openbsc/src/gprs/gtphub.c

diff --git a/openbsc/src/gprs/gtphub.c b/openbsc/src/gprs/gtphub.c
index 58300ea..a0af42b 100644
--- a/openbsc/src/gprs/gtphub.c
+++ b/openbsc/src/gprs/gtphub.c
@@ -1039,6 +1039,9 @@
 	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));