linux-kernel - Re: [PATCH v2] ima: require signed IMA policy when UEFI secure boot is enabled

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Message-ID: <5cbba927f2462f48012f683c923d53b3aa291c46.camel@linux.ibm.com>
Date:   Thu, 27 Jul 2023 13:38:08 -0400
From:   Mimi Zohar <zohar@...ux.ibm.com>
To:     Coiby Xu <coxu@...hat.com>, linux-integrity@...r.kernel.org
Cc:     Dmitry Kasatkin <dmitry.kasatkin@...il.com>,
        Paul Moore <paul@...l-moore.com>,
        James Morris <jmorris@...ei.org>,
        "Serge E. Hallyn" <serge@...lyn.com>,
        "open list:SECURITY SUBSYSTEM" 
        <linux-security-module@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] ima: require signed IMA policy when UEFI secure boot
 is enabled

On Wed, 2023-07-26 at 10:08 +0800, Coiby Xu wrote:
> With commit 099f26f22f58 ("integrity: machine keyring CA
> configuration"), users are able to add custom IMA CA keys via
> MOK.  This allows users to sign their own IMA polices without
> recompiling the kernel. For the sake of security, mandate signed IMA
> policy when UEFI secure boot is enabled.
> 
> Note this change may affect existing users/tests i.e users won't be able
> to load an unsigned IMA policy when the IMA architecture specific policy
> is configured and UEFI secure boot is enabled.
> 
> Suggested-by: Mimi Zohar <zohar@...ux.ibm.com>
> Signed-off-by: Coiby Xu <coxu@...hat.com>
> ---
> v2
>  - improve commit message [Mimi]
>   - explicitly mention the dependent commit
>   - add a note that the change will affect user space
>  - remove "/* CONFIG_INTEGRITY_MACHINE_KEYRING .. */" to improve code
>    readability

Thank you for updating the commit message.  The patch is now queued in
next-integrity-testing.

-- 
thanks,

Mimi