From: Guus Sliepen <guus@tinc-vpn.org>
Date: Mon, 26 Jul 2021 14:03:44 +0000 (+0200)
Subject: Fix ASAN warning.
X-Git-Url: https://tinc-vpn.org/git/browse?p=tinc;a=commitdiff_plain;h=f144971bf2e13baa80e41188546533f73f3cf453

Fix ASAN warning.

The commit fixing the stack overflow for malformed Subnets could compare
against a NULL pointer, which works fine in practice but is undefined
behavior.
---

diff --git a/src/subnet_parse.c b/src/subnet_parse.c
index 044d6e72..312e310c 100644
--- a/src/subnet_parse.c
+++ b/src/subnet_parse.c
@@ -307,7 +307,7 @@ bool str2net(subnet_t *subnet, const char *subnetstr) {
 	char *last_colon = strrchr(str, ':');
 
 	/* Check that the last colon is not further than possible in an IPv6 address */
-	if(last_colon >= str + 5 * 8) {
+	if(last_colon && last_colon >= str + 5 * 8) {
 		return false;
 	}