linux-hardening - Re: [PATCH 4/9] ima: Move ima_file

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Date:   Wed, 19 Oct 2022 08:55:49 +0200
From:   Roberto Sassu <roberto.sassu@...weicloud.com>
To:     Kees Cook <keescook@...omium.org>
Cc:     Christian Brauner <brauner@...nel.org>,
        Mimi Zohar <zohar@...ux.ibm.com>,
        Dmitry Kasatkin <dmitry.kasatkin@...il.com>,
        Paul Moore <paul@...l-moore.com>,
        James Morris <jmorris@...ei.org>,
        "Serge E. Hallyn" <serge@...lyn.com>, Petr Vorel <pvorel@...e.cz>,
        Jonathan McDowell <noodles@...com>,
        Borislav Petkov <bp@...e.de>, Takashi Iwai <tiwai@...e.de>,
        linux-integrity@...r.kernel.org,
        linux-security-module@...r.kernel.org,
        Mickaël Salaün <mic@...ikod.net>,
        KP Singh <kpsingh@...nel.org>,
        Casey Schaufler <casey@...aufler-ca.com>,
        John Johansen <john.johansen@...onical.com>,
        linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org
Subject: Re: [PATCH 4/9] ima: Move ima_file_free() into LSM

On Tue, 2022-10-18 at 11:29 -0700, Kees Cook wrote:
> On Tue, Oct 18, 2022 at 05:32:40PM +0200, Roberto Sassu wrote:
> > I also did this work before. In my implementation, I created a new
> > security hook called security_file_pre_free().
> > 
> > https://github.com/robertosassu/linux/commit/692c9d36fff865435b23b3cb765d31f3584f6263
> > 
> > If useful, the whole patch set is available at:
> > 
> > https://github.com/robertosassu/linux/commits/ima-evm-lsm-v1-devel-v3
> 
> Ah, lovely! Can you pick this back up and run with it? I mainly did
> these a proof-of-concept, but it looks like you got further.

It was some time ago. If I remember correctly, I got to the point of
running IMA/EVM and passing basic tests.

Will take a look at your patches and comments, and integrate in mines
if something is missing.

Will also send again the prerequisite patch set.

Roberto