From c371d357148819f69be13a3a9e4569d10933d82f Mon Sep 17 00:00:00 2001
From: david <david@e0a8ed71-7df4-0310-8962-fdc924857419>
Date: Mon, 24 Aug 2009 21:14:51 +0000
Subject: [PATCH] Add a check against svc->probe_matched being NULL before
 doing a string comparison in scanThroughTunnel. It is checked against NULL
 later in the function, so presumably it can happen.

---
 service_scan.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/service_scan.cc b/service_scan.cc
index 8cab4aafe..292f8497f 100644
--- a/service_scan.cc
+++ b/service_scan.cc
@@ -1829,7 +1829,7 @@ static void startNextProbe(nsock_pool nsp, nsock_iod nsi, ServiceGroup *SG,
 static int scanThroughTunnel(nsock_pool nsp, nsock_iod nsi, ServiceGroup *SG, 
 			     ServiceNFO *svc) {
 
-  if (strncmp(svc->probe_matched, "ssl/", 4) == 0) {
+  if (svc->probe_matched && strncmp(svc->probe_matched, "ssl/", 4) == 0) {
     /* The service has been detected without having to make an SSL connection */
     svc->tunnel = SERVICE_TUNNEL_SSL;
     svc->probe_matched += 4;