From: Guus Sliepen <guus@tinc-vpn.org>
Date: Fri, 12 Nov 2010 10:38:05 +0000 (+0100)
Subject: Don't use strlen() on a NULL pointer.
X-Git-Tag: release-1.0.14~34
X-Git-Url: https://www.tinc-vpn.org/git/browse?p=tinc;a=commitdiff_plain;h=930bf74fbe5ce8363b6cc2ae3a3e960e910e0996

Don't use strlen() on a NULL pointer.

A bug introduced in commit 667b1bac77b134cf32c98d5dc25619e8c3303f52 caused tinc
to crash on startup.
---

diff --git a/src/conf.c b/src/conf.c
index 1b8213c4..07279531 100644
--- a/src/conf.c
+++ b/src/conf.c
@@ -339,7 +339,7 @@ bool read_config_file(avl_tree_t *config_tree, const char *fname) {
 
 void read_config_options(avl_tree_t *config_tree, const char *prefix) {
 	list_node_t *node, *next;
-	size_t prefix_len = strlen(prefix);
+	size_t prefix_len = prefix ? strlen(prefix) : 0;
 
 	for(node = cmdline_conf->tail; node; node = next) {
 		config_t *cfg = (config_t *)node->data;