Avoid segfaults when parsing configuration

diff --git a/src/config.c b/src/config.c
index 9228a3725829bf59bea45e6060845459d303f1f7..e45596592bbf15898682652cb3e801be78b31441 100644 (file)
--- a/src/config.c
+++ b/src/config.c
@@ -260,7 +260,10 @@ int config_parse_interface(struct blob_attr *b, const char *name, bool overwrite
        blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb, blob_data(b), blob_len(b));
 
        if (tb[IFACE_ATTR_INTERFACE])
-               name = blobmsg_data(tb[IFACE_ATTR_INTERFACE]);
+               name = blobmsg_get_string(tb[IFACE_ATTR_INTERFACE]);
+
+       if (!name)
+               return -1;
 
        struct interface *iface = get_interface(name);
        if (!iface) {
@@ -281,6 +284,9 @@ int config_parse_interface(struct blob_attr *b, const char *name, bool overwrite
        else if ((c = tb[IFACE_ATTR_NETWORKID]))
                ifname = blobmsg_get_string(c);
 
+       if (!ifname)
+               return -1;
+
        strncpy(iface->ifname, ifname, sizeof(iface->ifname) - 1);
        iface->inuse = true;