mfd_fail_new
mfd_fail_new("kern_memfd_sysctl_2_exec",
mfd_fail_new(NULL, 0);
mfd_fail_new(buf, 0);
mfd_fail_new(buf, 0);
mfd_fail_new("", 0x0100);
mfd_fail_new("", ~MFD_CLOEXEC);
mfd_fail_new("", ~MFD_ALLOW_SEALING);
mfd_fail_new("", ~0);
mfd_fail_new("", 0x80000000U);
mfd_fail_new("", MFD_EXEC | MFD_NOEXEC_SEAL);