linux-kernel - Re: [PATCH v1 2/8] LSM: Add an LSM identifier for external use

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Date:   Thu, 27 Oct 2022 09:11:03 +0900
From:   Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
To:     Casey Schaufler <casey@...aufler-ca.com>,
        Greg KH <gregkh@...uxfoundation.org>
Cc:     casey.schaufler@...el.com, paul@...l-moore.com,
        linux-security-module@...r.kernel.org, jmorris@...ei.org,
        keescook@...omium.org, john.johansen@...onical.com,
        stephen.smalley.work@...il.com, linux-kernel@...r.kernel.org,
        linux-api@...r.kernel.org, mic@...ikod.net
Subject: Re: [PATCH v1 2/8] LSM: Add an LSM identifier for external use

>>> + */
>>> +
>>> +#ifndef _UAPI_LINUX_LSM_H
>>> +#define _UAPI_LINUX_LSM_H
>>> +
>>> +/*
>>> + * ID values to identify security modules.
>>> + * A system may use more than one security module.
>>> + *
>>> + * LSM_ID_XXX values 0 - 31 are reserved for future use
>> Reserved for what?  Why?
> 
> You're not the first person to ask. I'll remove the reserved values
> for the next version. The invalid value has to change as the id field
> is going to be unsigned.

Don't define a user-visible static integer for LSM module.
We can continue using names or dynamically assigned integer.

https://lkml.kernel.org/r/a0567b10-fa83-50f4-7bf6-937e0c677e60@I-love.SAKURA.ne.jp

Nacked-by: Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>