linux-kernel - Re: [PATCH v38 09/39] LSM: Add the lsmblob data structure.

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Date:   Wed, 12 Oct 2022 23:18:33 +0200
From:   Mickaël Salaün <mic@...ikod.net>
To:     Casey Schaufler <casey@...aufler-ca.com>,
        casey.schaufler@...el.com, paul@...l-moore.com,
        linux-security-module@...r.kernel.org
Cc:     linux-audit@...hat.com, jmorris@...ei.org, selinux@...r.kernel.org,
        keescook@...omium.org, john.johansen@...onical.com,
        penguin-kernel@...ove.sakura.ne.jp, stephen.smalley.work@...il.com,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v38 09/39] LSM: Add the lsmblob data structure.


On 27/09/2022 21:53, Casey Schaufler wrote:
> When more than one security module is exporting data to
> audit and networking sub-systems a single 32 bit integer
> is no longer sufficient to represent the data. Add a
> structure to be used instead.
> 
> The lsmblob structure is currently an array of
> u32 "secids". There is an entry for each of the security
> modules built into the system that would use secids if
> active. The system assigns the module a "slot" when it
> registers hooks. If modules are compiled in but not
> registered there will be unused slots. The slot number
> is added to the lsm_id structure.
> 
> The audit rules data is expanded to use an array of
> security module data rather than a single instance.
> A new structure audit_lsm_rules is defined to avoid the
> confusion which commonly accompanies the use of
> void ** parameters.
> 
> Signed-off-by: Casey Schaufler <casey@...aufler-ca.com>
> ---

[...]

> diff --git a/security/landlock/setup.c b/security/landlock/setup.c
> index 1242c61c9de4..adbe941370f3 100644
> --- a/security/landlock/setup.c
> +++ b/security/landlock/setup.c
> @@ -27,6 +27,7 @@ struct lsm_blob_sizes landlock_blob_sizes __lsm_ro_after_init = {
>   struct lsm_id landlock_lsmid __lsm_ro_after_init = {
>   	.lsm      = LANDLOCK_NAME,
>   	.id       = LSM_ID_LANDLOCK,
> +	.slot     = LSMBLOB_NOT_NEEDED,

Please only use one space after ".slot"