linux-kernel - Re: [PATCH 03/10] SELinux: Abstract use of cred security blob

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAGXu5jLBwipu9WD41rQvdTjoM=+3gigrA3sp1s1gFv8C_U0nRg@mail.gmail.com>
Date:   Wed, 12 Sep 2018 16:10:25 -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>,
        LKLM <linux-kernel@...r.kernel.org>,
        SE Linux <selinux@...ho.nsa.gov>,
        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>,
        "Schaufler, Casey" <casey.schaufler@...el.com>
Subject: Re: [PATCH 03/10] SELinux: Abstract use of cred security blob

On Tue, Sep 11, 2018 at 9:41 AM, Casey Schaufler <casey@...aufler-ca.com> wrote:
> Don't use the cred->security pointer directly.
> Provide a helper function that provides the security blob pointer.
>
> Signed-off-by: Casey Schaufler <casey@...aufler-ca.com>

Like smack, this seems to be largely:

s/$identifier->security/selinux_cred($identifier)/
s/current_security()/selinux_cred(current_cred())/

Is that right? The one __task_cred() use seemed to be fully contained
under rcu read lock.

Reviewed-by: Kees Cook <keescook@...omium.org>

-Kees

-- 
Kees Cook
Pixel Security