[PATCH v2] security: Introduce LSM_ORDER_LAST and set it for the integrity LSM

[Mimi Zohar]

On Wed, 2023-03-08 at 18:11 +0100, Roberto Sassu wrote:
> From: Roberto Sassu <roberto.sassu at huawei.com>
> 
> Introduce LSM_ORDER_LAST, to satisfy the requirement of LSMs willing to be
> the last, e.g. the 'integrity' LSM, without changing the kernel command
> line or configuration.

^needing to be last

> 
> Also, set this order for the 'integrity' LSM. While not enforced, this is
> the only LSM expected to use it.
> 
> Similarly to LSM_ORDER_FIRST, LSMs with LSM_ORDER_LAST are always enabled
> and put at the end of the LSM list.
> 
> Finally, for LSM_ORDER_MUTABLE LSMs, set the found variable to true if an
> LSM is found, regardless of its order. In this way, the kernel would not
> wrongly report that the LSM is not built-in in the kernel if its order is
> LSM_ORDER_LAST.
> 
> Fixes: 79f7865d844c ("LSM: Introduce "lsm=" for boottime LSM selection")
> Signed-off-by: Roberto Sassu <roberto.sassu at huawei.com>

Thanks, Roberto.  With this patch, 'integrity' can be safely removed
from CONFIG_LSM definitions.

-- 
thanks,

Mimi