diff --git a/include/linux/can/netlink.h b/include/linux/can/netlink.h
index 25fd52cc..6d4ec2a9 100644
--- a/include/linux/can/netlink.h
+++ b/include/linux/can/netlink.h
@@ -98,6 +98,7 @@ struct can_ctrlmode {
 #define CAN_CTRLMODE_BERR_REPORTING	0x10	/* Bus-error reporting */
 #define CAN_CTRLMODE_FD			0x20	/* CAN FD mode */
 #define CAN_CTRLMODE_PRESUME_ACK	0x40	/* Ignore missing CAN ACKs */
+#define CAN_CTRLMODE_FD_NON_ISO		0x80	/* CAN FD in non-ISO mode */
 
 /*
  * CAN device statistics
diff --git a/ip/ipneigh.c b/ip/ipneigh.c
index 6be79e1a..eeec7bdd 100644
--- a/ip/ipneigh.c
+++ b/ip/ipneigh.c
@@ -157,14 +157,19 @@ static int ipneigh_modify(int cmd, int flags, int argc, char **argv)
 		exit(-1);
 	}
 	req.ndm.ndm_family = dst.family;
-	addattr_l(&req.n, sizeof(req), NDA_DST, &dst.data, dst.bytelen);
+	if (addattr_l(&req.n, sizeof(req), NDA_DST, &dst.data, dst.bytelen) < 0)
+		return -1;
 
 	if (lla && strcmp(lla, "null")) {
 		char llabuf[20];
 		int l;
 
 		l = ll_addr_a2n(llabuf, sizeof(llabuf), lla);
-		addattr_l(&req.n, sizeof(req), NDA_LLADDR, llabuf, l);
+		if (l < 0)
+			return -1;
+
+		if (addattr_l(&req.n, sizeof(req), NDA_LLADDR, llabuf, l) < 0)
+			return -1;
 	}
 
 	ll_init_map(&rth);