diff --git a/net/sunrpc/auth.c b/net/sunrpc/auth.c
index 2bc0cc2..ed2fdd2 100644
--- a/net/sunrpc/auth.c
+++ b/net/sunrpc/auth.c
@@ -82,7 +82,7 @@
 
 static u32
 pseudoflavor_to_flavor(u32 flavor) {
-	if (flavor >= RPC_AUTH_MAXFLAVOR)
+	if (flavor > RPC_AUTH_MAXFLAVOR)
 		return RPC_AUTH_GSS;
 	return flavor;
 }
@@ -173,6 +173,9 @@
 	const struct rpc_authops *ops;
 	int result;
 
+	if (flavor >= RPC_AUTH_MAXFLAVOR)
+		return -EINVAL;
+
 	ops = auth_flavors[flavor];
 	if (ops == NULL)
 		request_module("rpc-auth-%u", flavor);