linux-kernel - Re: [PATCH v3 07/16] TOMOYO: Abstract use of cred security blob

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Message-ID: <CAGXu5jJ0xB+Zh7oUAzk9kDMaFTOcNXFzOxL6mwqsw8KaQ0Ks-g@mail.gmail.com>
Date:   Thu, 20 Sep 2018 10:13:17 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Casey Schaufler <casey@...aufler-ca.com>
Cc:     LSM <linux-security-module@...r.kernel.org>,
        James Morris <jmorris@...ei.org>,
        SE Linux <selinux@...ho.nsa.gov>,
        LKLM <linux-kernel@...r.kernel.org>,
        John Johansen <john.johansen@...onical.com>,
        Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>,
        Paul Moore <paul@...l-moore.com>,
        Stephen Smalley <sds@...ho.nsa.gov>,
        "linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
        Alexey Dobriyan <adobriyan@...il.com>,
        Mickaël Salaün <mic@...ikod.net>,
        Salvatore Mesoraca <s.mesoraca16@...il.com>
Subject: Re: [PATCH v3 07/16] TOMOYO: Abstract use of cred security blob

On Wed, Sep 19, 2018 at 5:20 PM, Casey Schaufler <casey@...aufler-ca.com> wrote:
> @@ -539,13 +557,16 @@ DEFINE_SRCU(tomoyo_ss);
>  static int __init tomoyo_init(void)
>  {
>         struct cred *cred = (struct cred *) current_cred();
> +       struct tomoyo_domain_info **blob;
>
>         if (!security_module_enable("tomoyo"))
>                 return 0;
> +
>         /* register ourselves with the security framework */
>         security_add_hooks(tomoyo_hooks, ARRAY_SIZE(tomoyo_hooks), "tomoyo");
>         printk(KERN_INFO "TOMOYO Linux initialized\n");
> -       cred->security = &tomoyo_kernel_domain;
> +       blob = tomoyo_cred(cred);
> +       *blob = &tomoyo_kernel_domain;
>         tomoyo_mm_init();
>         return 0;
>  }

This is missing "tomoyo_enabled = true;" which is included in the next
patch but should be here.

-Kees

-- 
Kees Cook
Pixel Security