linux-kernel - Re: [PATCH] integrity: powerpc: Do not select CA_MACHINE

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Message-Id: <CVGUDAU0TSNU.2KQP3U44NG61T@suppilovahvero>
Date:   Tue, 12 Sep 2023 12:46:32 +0300
From:   "Jarkko Sakkinen" <jarkko@...nel.org>
To:     Michal Suchánek <msuchanek@...e.de>
Cc:     <linux-integrity@...r.kernel.org>,
        "Mimi Zohar" <zohar@...ux.ibm.com>,
        "Dmitry Kasatkin" <dmitry.kasatkin@...il.com>,
        "Paul Moore" <paul@...l-moore.com>,
        "James Morris" <jmorris@...ei.org>,
        "Serge E. Hallyn" <serge@...lyn.com>,
        <linux-security-module@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, "joeyli" <jlee@...e.com>
Subject: Re: [PATCH] integrity: powerpc: Do not select CA_MACHINE_KEYRING

On Tue Sep 12, 2023 at 10:51 AM EEST, Michal Suchánek wrote:
> On Tue, Sep 12, 2023 at 12:45:35AM +0300, Jarkko Sakkinen wrote:
> > On Thu Sep 7, 2023 at 7:52 PM EEST, Michal Suchanek wrote:
> > > No other platform needs CA_MACHINE_KEYRING, either.
> > >
> > > This is policy that should be decided by the administrator, not Kconfig
> > 
> > s/administrator/distributor/ ?
>
> It depends on the situation. Ideally the administrator would pick the
> distributor that provides a policy that is considered fitting for the
> purpose or roll their own. Unfortunately, they don't always have the
> choice.
>
> For the kerenel's part it should support wide range of policies for
> different use cases, and not force the hand of the administrator or
> distributor.
>
> > 
> > > dependencies.
> > >
> > > cc: joeyli <jlee@...e.com>
> > > Signed-off-by: Michal Suchanek <msuchanek@...e.de>
> > > ---
> > >  security/integrity/Kconfig | 2 --
> > >  1 file changed, 2 deletions(-)
> > >
> > > diff --git a/security/integrity/Kconfig b/security/integrity/Kconfig
> > > index 232191ee09e3..b6e074ac0227 100644
> > > --- a/security/integrity/Kconfig
> > > +++ b/security/integrity/Kconfig
> > > @@ -68,8 +68,6 @@ config INTEGRITY_MACHINE_KEYRING
> > >  	depends on INTEGRITY_ASYMMETRIC_KEYS
> > >  	depends on SYSTEM_BLACKLIST_KEYRING
> > >  	depends on LOAD_UEFI_KEYS || LOAD_PPC_KEYS
> > > -	select INTEGRITY_CA_MACHINE_KEYRING if LOAD_PPC_KEYS
> > > -	select INTEGRITY_CA_MACHINE_KEYRING_MAX if LOAD_PPC_KEYS
> > >  	help
> > >  	 If set, provide a keyring to which Machine Owner Keys (MOK) may
> > >  	 be added. This keyring shall contain just MOK keys.  Unlike keys
> > > -- 
> > > 2.41.0
> > 
> > I'd suggest to add even fixes tag.
>
> Here it is
>
> Fixes: d7d91c4743c4 ("integrity: PowerVM machine keyring enablement")

commit b755dd58d180b796d21bc14d03045e4ab84222b0 (HEAD -> next, origin/next)
Author: Michal Suchanek <msuchanek@...e.de>
Date:   Thu Sep 7 18:52:19 2023 +0200

    integrity: powerpc: Do not select CA_MACHINE_KEYRING

    No other platform needs CA_MACHINE_KEYRING, either.

    This is policy that should be decided by the administrator, not Kconfig
    dependencies.

    Fixes: d7d91c4743c4 ("integrity: PowerVM machine keyring enablement")
    Signed-off-by: Michal Suchanek <msuchanek@...e.de>
    Signed-off-by: Jarkko Sakkinen <jarkko@...nel.org>

diff --git a/security/integrity/Kconfig b/security/integrity/Kconfig
index 232191ee09e3..b6e074ac0227 100644
--- a/security/integrity/Kconfig
+++ b/security/integrity/Kconfig
@@ -68,8 +68,6 @@ config INTEGRITY_MACHINE_KEYRING
        depends on INTEGRITY_ASYMMETRIC_KEYS
        depends on SYSTEM_BLACKLIST_KEYRING
        depends on LOAD_UEFI_KEYS || LOAD_PPC_KEYS
-       select INTEGRITY_CA_MACHINE_KEYRING if LOAD_PPC_KEYS
-       select INTEGRITY_CA_MACHINE_KEYRING_MAX if LOAD_PPC_KEYS
        help
         If set, provide a keyring to which Machine Owner Keys (MOK) may
         be added. This keyring shall contain just MOK keys.  Unlike keys

If this look good to you, I'll put it to the -rc2 pull request.

> Thanks
>
> Michal

BR, Jarkko