If kstrdup_const() then this function returns zero (success) but it
should return -ENOMEM.
Fixes: ac83228a7101 ("SUNRPC: Use namespace of listening daemon in the client AUTH_GSS upcall") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>