linux-kernel - Re: [PATCH v2] x86/ima: require signed kernel modules

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Message-ID: <CACdnJuuPyL3Qo4jAiJDQvUF9Ctch6Yo2bKezEuQ2KaM5ZZ1vqw@mail.gmail.com>
Date:   Thu, 7 Mar 2019 14:27:30 -0800
From:   Matthew Garrett <mjg59@...gle.com>
To:     Mimi Zohar <zohar@...ux.ibm.com>
Cc:     linux-integrity <linux-integrity@...r.kernel.org>,
        LSM List <linux-security-module@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Jessica Yu <jeyu@...nel.org>,
        Luis Chamberlain <mcgrof@...nel.org>,
        David Howells <dhowells@...hat.com>,
        Seth Forshee <seth.forshee@...onical.com>,
        "Bruno E . O . Meneguele" <bmeneg@...hat.com>
Subject: Re: [PATCH v2] x86/ima: require signed kernel modules

On Wed, Feb 13, 2019 at 4:18 AM Mimi Zohar <zohar@...ux.ibm.com> wrote:
> -       if (IS_ENABLED(CONFIG_IMA_ARCH_POLICY) && arch_ima_get_secureboot())
> +       if (IS_ENABLED(CONFIG_IMA_ARCH_POLICY) && arch_ima_get_secureboot()) {
> +               if (IS_ENABLED(CONFIG_MODULE_SIG))
> +                       set_module_sig_enforced();
>                 return sb_arch_rules;

Linus previously pushed back on having the lockdown features
automatically enabled on secure boot systems. Why are we doing the
same in IMA?