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

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Message-ID: <CAHC9VhTfF0oU5ppYcf_WMztDp-nyZ9bQ2oE4Z+b5Ajk4wszw-Q@mail.gmail.com>
Date:   Thu, 20 Oct 2022 11:47:46 -0400
From:   Paul Moore <paul@...l-moore.com>
To:     Roberto Sassu <roberto.sassu@...weicloud.com>
Cc:     Kees Cook <keescook@...omium.org>,
        Christian Brauner <brauner@...nel.org>,
        Mimi Zohar <zohar@...ux.ibm.com>,
        Dmitry Kasatkin <dmitry.kasatkin@...il.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 Wed, Oct 19, 2022 at 2:56 AM Roberto Sassu
<roberto.sassu@...weicloud.com> wrote:
> 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.

Thanks Roberto, I appreciate you taking the time to resume your
earlier work.  I think this will be a nice improvement and help us
cleanup a lot of code.

-- 
paul-moore.com