From db27b848ddf754e84aec3b78c595dd331f47b083 Mon Sep 17 00:00:00 2001
From: Bastien Dejean <nihilhill@gmail.com>
Date: Mon, 5 Nov 2018 10:29:17 +0100
Subject: [PATCH] Don't crash when class_name is NULL

Fixes #870.
---
 src/rule.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/rule.c b/src/rule.c
index 2dc4a5d..61f6192 100644
--- a/src/rule.c
+++ b/src/rule.c
@@ -85,7 +85,7 @@ void remove_rule_by_cause(char *cause)
 	char *instance_name = strtok(NULL, COL_TOK);
 	while (r != NULL) {
 		rule_t *next = r->next;
-		if ((streq(class_name, MATCH_ANY) || streq(r->class_name, class_name)) &&
+		if ((class_name != NULL && (streq(class_name, MATCH_ANY) || streq(r->class_name, class_name))) &&
 		    (instance_name == NULL || streq(instance_name, MATCH_ANY) || streq(r->instance_name, instance_name))) {
 			remove_rule(r);
 		}