From 4a673e1cd26d58ebf4397dd06ee5fa39f7f832da Mon Sep 17 00:00:00 2001
From: Rob Ekl <ekl.rob@gmail.com>
Date: Fri, 14 Oct 2022 11:50:43 -0500
Subject: fix null pointer dereference for INFORM messages

---
 src/dhcpv4.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/dhcpv4.c b/src/dhcpv4.c
index f078087..7ac7af9 100644
--- a/src/dhcpv4.c
+++ b/src/dhcpv4.c
@@ -849,7 +849,7 @@ void dhcpv4_handle_msg(void *addr, void *data, size_t len,
 		dhcpv4_put(&reply, &cookie, DHCPV4_OPT_DNSSERVER,
 				4 * iface->dhcpv4_dns_cnt, iface->dhcpv4_dns);
 
-	if (a->reqopts && iface->dhcpv4_ntp_cnt != 0) {
+	if (a && a->reqopts && iface->dhcpv4_ntp_cnt != 0) {
 		for(size_t opts = 0; a->reqopts[opts]; opts++) {
 			if (a->reqopts[opts] == DHCPV4_OPT_NTPSERVER) {
 				dhcpv4_put(&reply, &cookie, DHCPV4_OPT_NTPSERVER,
-- 
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