--- x/net/core/rtnetlink.c
+++ y/net/core/rtnetlink.c
@@ -3458,6 +3458,10 @@ static int rtnl_newlink_create(struct sk
 		link_net = NULL;
 	}
 
+	if (ifm->ifi_index > INT_MAX) {
+		err = -EINVAL;
+		goto out;
+	}
 	dev = rtnl_create_link(link_net ? : dest_net, ifname,
 			       name_assign_type, ops, tb, extack);
 	if (IS_ERR(dev)) {