linux-kernel - Re: [PATCH v4 06/15] smack: Refactor to remove bprm

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Message-ID: <alpine.LRH.2.20.1708011046410.6845@namei.org>
Date:   Tue, 1 Aug 2017 10:46:59 +1000 (AEST)
From:   James Morris <jmorris@...ei.org>
To:     Kees Cook <keescook@...omium.org>
cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Casey Schaufler <casey@...aufler-ca.com>,
        David Howells <dhowells@...hat.com>,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        John Johansen <john.johansen@...onical.com>,
        "Serge E. Hallyn" <serge@...lyn.com>,
        Paul Moore <paul@...l-moore.com>,
        Stephen Smalley <sds@...ho.nsa.gov>,
        Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>,
        James Morris <james.l.morris@...cle.com>,
        Andy Lutomirski <luto@...nel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        linux-fsdevel@...r.kernel.org,
        linux-security-module@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 06/15] smack: Refactor to remove bprm_secureexec
 hook

On Mon, 31 Jul 2017, Kees Cook wrote:

> The Smack bprm_secureexec hook can be merged with the bprm_set_creds
> hook since it's dealing with the same information, and all of the details
> are finalized during the first call to the bprm_set_creds hook via
> prepare_binprm() (subsequent calls due to binfmt_script, etc, are ignored
> via bprm->called_set_creds).
> 
> Here, the test can just happen at the end of the bprm_set_creds hook,
> and the bprm_secureexec hook can be dropped.
> 
> Cc: Casey Schaufler <casey@...aufler-ca.com>
> Signed-off-by: Kees Cook <keescook@...omium.org>
> Acked-by: Serge Hallyn <serge@...lyn.com>
> ---
>  security/smack/smack_lsm.c | 21 ++++-----------------
>  1 file changed, 4 insertions(+), 17 deletions(-)


Reviewed-by: James Morris <james.l.morris@...cle.com>


-- 
James Morris
<jmorris@...ei.org>