From 32a2da147b652bd12f25fd568ed1ead5775b1b5b Mon Sep 17 00:00:00 2001
From: William Metcalf <william.metcalf@gmail.com>
Date: Thu, 20 May 2010 13:12:11 -0500
Subject: [PATCH] Null deref fix for detect-engine-iponly.c

---
 src/detect-engine-iponly.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/detect-engine-iponly.c b/src/detect-engine-iponly.c
index 7819eb3d38..44998cb569 100644
--- a/src/detect-engine-iponly.c
+++ b/src/detect-engine-iponly.c
@@ -615,6 +615,9 @@ int IPOnlyCIDRItemParseSingle(IPOnlyCIDRItem *dd, char *str)
 
     /* we dup so we can put a nul-termination in it later */
     ip = ipdup;
+    if (ip == NULL) {
+        goto error;
+    }
 
     /* handle the negation case */
     if (ip[0] == '!') {