diff --git a/net/ipv4/fib_trie.c b/net/ipv4/fib_trie.c
index a28f525e2c47458c58768038566cb7785ae0069f..d11fb16234a6af17aa65349a58ae79acbaf49d7a 100644
--- a/net/ipv4/fib_trie.c
+++ b/net/ipv4/fib_trie.c
@@ -1331,8 +1331,10 @@ int fib_table_insert(struct net *net, struct fib_table *tb,
 
 	/* The alias was already inserted, so the node must exist. */
 	l = l ? l : fib_find_node(t, &tp, key);
-	if (WARN_ON_ONCE(!l))
+	if (WARN_ON_ONCE(!l)) {
+		err = -ENOENT;
 		goto out_free_new_fa;
+	}
 
 	if (fib_find_alias(&l->leaf, new_fa->fa_slen, 0, 0, tb->tb_id, true) ==
 	    new_fa) {