linux-kernel - Re: [PATCH v8 20/24] ima: Move IMA-Appraisal to LSM infrastructure

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Message-ID: <b16e3c23475119a51218378a0749d023773b30f1.camel@linux.ibm.com>
Date: Tue, 26 Dec 2023 17:15:18 -0500
From: Mimi Zohar <zohar@...ux.ibm.com>
To: Roberto Sassu <roberto.sassu@...weicloud.com>, viro@...iv.linux.org.uk,
        brauner@...nel.org, chuck.lever@...cle.com, jlayton@...nel.org,
        neilb@...e.de, kolga@...app.com, Dai.Ngo@...cle.com, tom@...pey.com,
        paul@...l-moore.com, jmorris@...ei.org, serge@...lyn.com,
        dmitry.kasatkin@...il.com, dhowells@...hat.com, jarkko@...nel.org,
        stephen.smalley.work@...il.com, eparis@...isplace.org,
        casey@...aufler-ca.com, shuah@...nel.org, mic@...ikod.net
Cc: linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-nfs@...r.kernel.org, linux-security-module@...r.kernel.org,
        linux-integrity@...r.kernel.org, keyrings@...r.kernel.org,
        selinux@...r.kernel.org, linux-kselftest@...r.kernel.org,
        Roberto Sassu
	 <roberto.sassu@...wei.com>,
        Stefan Berger <stefanb@...ux.ibm.com>
Subject: Re: [PATCH v8 20/24] ima: Move IMA-Appraisal to LSM infrastructure

On Thu, 2023-12-14 at 18:08 +0100, Roberto Sassu wrote:
> From: Roberto Sassu <roberto.sassu@...wei.com>

A few additional IMA hooks are needed to reset the cached appraisal
status, causing the file's integrity to be re-evaluated on next access.
Register these IMA-appraisal only functions separately ...

Mimi

> Do the registration of IMA-Appraisal only functions separately from the
> rest of IMA functions, as appraisal is a separate feature not necessarily
> enabled in the kernel configuration.
> 
> Reuse the same approach as for other IMA functions, move hardcoded calls
> from various places in the kernel to the LSM infrastructure. Declare the
> functions as static and register them as hook implementations in
> init_ima_appraise_lsm(), called by init_ima_lsm().
> 
> Signed-off-by: Roberto Sassu <roberto.sassu@...wei.com>
> Reviewed-by: Stefan Berger <stefanb@...ux.ibm.com>
> Reviewed-by: Mimi Zohar <zohar@...ux.ibm.com>