linux-kernel - Re: [PATCH v2 2/8] exec: Factor security_bprm_creds_for_exec out of security_bprm_set

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Message-ID: <alpine.LRH.2.21.2005200728110.6670@namei.org>
Date:   Wed, 20 May 2020 07:28:31 +1000 (AEST)
From:   James Morris <jmorris@...ei.org>
To:     Kees Cook <keescook@...omium.org>
cc:     "Eric W. Biederman" <ebiederm@...ssion.com>,
        linux-kernel@...r.kernel.org,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Oleg Nesterov <oleg@...hat.com>, Jann Horn <jannh@...gle.com>,
        Greg Ungerer <gerg@...ux-m68k.org>,
        Rob Landley <rob@...dley.net>,
        Bernd Edlinger <bernd.edlinger@...mail.de>,
        linux-fsdevel@...r.kernel.org, Al Viro <viro@...IV.linux.org.uk>,
        Alexey Dobriyan <adobriyan@...il.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Casey Schaufler <casey@...aufler-ca.com>,
        linux-security-module@...r.kernel.org,
        "Serge E. Hallyn" <serge@...lyn.com>,
        Andy Lutomirski <luto@...capital.net>
Subject: Re: [PATCH v2 2/8] exec: Factor security_bprm_creds_for_exec out of
 security_bprm_set_creds

On Tue, 19 May 2020, Kees Cook wrote:

> >  	/* SELinux context only depends on initial program or script and not
> >  	 * the script interpreter */
> > -	if (bprm->called_set_creds)
> > -		return 0;
> >  
> >  	old_tsec = selinux_cred(current_cred());
> >  	new_tsec = selinux_cred(bprm->cred);
> 
> As you've done in the other LSMs, I think this comment can be removed
> (or moved to the top of the function) too.

I'd prefer moved to top of the function.

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