From dd12757493a9c144fbcfe0f91da0cd2cd58d0d88 Mon Sep 17 00:00:00 2001
From: Luca Deri <deri@ntop.org>
Date: Sat, 5 Mar 2016 08:22:04 +0100
Subject: Added check to harden code

---
 src/lib/ndpi_main.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'src')

diff --git a/src/lib/ndpi_main.c b/src/lib/ndpi_main.c
index 0d1c21c9e..1b9d4c1f6 100644
--- a/src/lib/ndpi_main.c
+++ b/src/lib/ndpi_main.c
@@ -3196,6 +3196,8 @@ ndpi_protocol ndpi_detection_giveup(struct ndpi_detection_module_struct *ndpi_st
 				    struct ndpi_flow_struct *flow) {
   ndpi_protocol ret = { NDPI_PROTOCOL_UNKNOWN, NDPI_PROTOCOL_UNKNOWN };
 
+  if(flow == NULL) return(ret);
+
   /* TODO: add the remaining stage_XXXX protocols */
   if(flow->detected_protocol_stack[0] == NDPI_PROTOCOL_UNKNOWN) {
     if(flow->http_detected)
-- 
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