diff --git a/net/netlink/diag.c b/net/netlink/diag.c
index e12c90d5f6ad..61981e01fd6f 100644
--- a/net/netlink/diag.c
+++ b/net/netlink/diag.c
@@ -207,7 +207,7 @@ static int netlink_diag_dump(struct sk_buff *skb, struct netlink_callback *cb)
 		err = __netlink_diag_dump(skb, cb, req->sdiag_protocol, s_num);
 	}
 
-	return err < 0 ? err : skb->len;
+	return err <= 0 ? err : skb->len;
 }
 
 static int netlink_diag_dump_done(struct netlink_callback *cb)