security/keys/process_keys.c

416  * successful, -EAGAIN if we didn't find any matching key or -ENOKEY if we only
428 	/* we want to return -EAGAIN or -ENOKEY if any of the keyrings were
433 	 * in terms of priority: success > -ENOKEY > -EAGAIN > other error
448 		case -ENOKEY: /* negative key */
469 		case -ENOKEY: /* negative key */
491 		case -ENOKEY: /* negative key */
513 		case -ENOKEY: /* negative key */
574 	if (err == ERR_PTR(-ENOKEY) || ret == ERR_PTR(-ENOKEY))
575 		key_ref = ERR_PTR(-ENOKEY);
602  * -EINVAL if the key ID is invalid; -ENOKEY if the key ID does not correspond
627 	key_ref = ERR_PTR(-ENOKEY);
867 	if (PTR_ERR(keyring) == -ENOKEY) {