linux-kernel - Re: [RFC PATCH v2 1/2] integrity, KEYS: add a reference to platform keyring

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Date:   Tue, 15 Jan 2019 10:54:49 -0500
From:   Mimi Zohar <zohar@...ux.ibm.com>
To:     Kairui Song <kasong@...hat.com>
Cc:     linux-kernel@...r.kernel.org, David Howells <dhowells@...hat.com>,
        David Woodhouse <dwmw2@...radead.org>,
        jwboyer@...oraproject.org, keyrings@...r.kernel.org,
        jmorris@...ei.org, serge@...lyn.com, bauerman@...ux.ibm.com,
        Eric Biggers <ebiggers@...gle.com>, nayna@...ux.ibm.com,
        Dave Young <dyoung@...hat.com>,
        linux-integrity <linux-integrity@...r.kernel.org>,
        kexec@...ts.infradead.org
Subject: Re: [RFC PATCH v2 1/2] integrity, KEYS: add a reference to platform
 keyring

On Tue, 2019-01-15 at 23:47 +0800, Kairui Song wrote:
> On Tue, Jan 15, 2019 at 11:34 PM Mimi Zohar <zohar@...ux.ibm.com> wrote:
> >
> > On Tue, 2019-01-15 at 17:45 +0800, Kairui Song wrote:
> > [snip]
> >
> > > diff --git a/security/integrity/digsig.c b/security/integrity/digsig.c
> > > index f45d6edecf99..bfabc2a8111d 100644
> > > --- a/security/integrity/digsig.c
> > > +++ b/security/integrity/digsig.c
> > > @@ -89,6 +89,12 @@ static int __integrity_init_keyring(const unsigned int id, key_perm_t perm,
> > >               keyring[id] = NULL;
> > >       }
> > >
> > > +#ifdef CONFIG_INTEGRITY_PLATFORM_KEYRING
> > > +     if (id == INTEGRITY_KEYRING_PLATFORM) {
> > > +             set_platform_trusted_keys(keyring[id]);
> > > +     }
> > > +#endif
> > > +
> > >       return err;
> > >  }
> > >
> >
> > Any reason for setting it here as opposed to in the caller
> > platform_keyring_init()?
> >
> > Mimi
> >
> 
> Yes, "keyring" is static so unless I expose it to other files, it is
> only accessible here. And I think there should be no problem to put
> the set_platform_trusted_keys here.

Right, that's a really good reason.

Mimi