From bae3028d4848b2e6e8017f004c090da2a17d1d12 Mon Sep 17 00:00:00 2001
From: Daniel Danzberger <daniel@dd-wrt.com>
Date: Thu, 16 Jan 2020 22:10:33 +0100
Subject: [PATCH] tr181: dhcpv4: fix segfault on interface_get_ipv4

Signed-off-by: Daniel Danzberger <daniel@dd-wrt.com>
---
 dmtree/tr181/dhcpv4.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/dmtree/tr181/dhcpv4.c b/dmtree/tr181/dhcpv4.c
index ed9c988f..e1cc1c2d 100644
--- a/dmtree/tr181/dhcpv4.c
+++ b/dmtree/tr181/dhcpv4.c
@@ -2855,6 +2855,9 @@ static int interface_get_ipv4(const char *iface, uint32_t *addr, unsigned *bits)
 		json_object *jobj;
 
 		jobj = dmjson_select_obj_in_array_idx(res, 0, 1, "ipv4-address");
+		if (jobj == NULL)
+			return -1;
+
 		json_object_object_foreach(jobj, key, val) {
 			if (!strcmp(key, "address"))
 				addr_str = json_object_get_string(val);