linux-kernel - Re: [PATCH v3 2/6] integrity: ignore keys failing CA restrictions on non-UEFI platform

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Message-Id: <CUU9VV4M4LGZ.1W0BC1H1C0WE2@suppilovahvero>
Date:   Thu, 17 Aug 2023 00:04:45 +0300
From:   "Jarkko Sakkinen" <jarkko@...nel.org>
To:     "Mimi Zohar" <zohar@...ux.ibm.com>,
        "Nayna Jain" <nayna@...ux.ibm.com>,
        <linux-integrity@...r.kernel.org>
Cc:     "Eric Snowberg" <eric.snowberg@...cle.com>,
        "Paul Moore" <paul@...l-moore.com>,
        <linux-security-module@...r.kernel.org>,
        "linuxppc-dev" <linuxppc-dev@...ts.ozlabs.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 2/6] integrity: ignore keys failing CA restrictions
 on non-UEFI platform

On Wed Aug 16, 2023 at 3:58 PM EEST, Mimi Zohar wrote:
> On Mon, 2023-08-14 at 20:38 +0300, Jarkko Sakkinen wrote:
> > On Sun Aug 13, 2023 at 5:15 AM EEST, Nayna Jain wrote:
> > > On non-UEFI platforms, handle restrict_link_by_ca failures differently.
> > >
> > > Certificates which do not satisfy CA restrictions on non-UEFI platforms
> > > are ignored.
> > >
> > > Signed-off-by: Nayna Jain <nayna@...ux.ibm.com>
> > > Reviewed-and-tested-by: Mimi Zohar <zohar@...ux.ibm.com>
> > > ---
> > >  security/integrity/platform_certs/machine_keyring.c | 2 +-
> > >  1 file changed, 1 insertion(+), 1 deletion(-)
> > >
> > > diff --git a/security/integrity/platform_certs/machine_keyring.c b/security/integrity/platform_certs/machine_keyring.c
> > > index 7aaed7950b6e..389a6e7c9245 100644
> > > --- a/security/integrity/platform_certs/machine_keyring.c
> > > +++ b/security/integrity/platform_certs/machine_keyring.c
> > > @@ -36,7 +36,7 @@ void __init add_to_machine_keyring(const char *source, const void *data, size_t
> > >  	 * If the restriction check does not pass and the platform keyring
> > >  	 * is configured, try to add it into that keyring instead.
> > >  	 */
> > > -	if (rc && IS_ENABLED(CONFIG_INTEGRITY_PLATFORM_KEYRING))
> > > +	if (rc && efi_enabled(EFI_BOOT) && IS_ENABLED(CONFIG_INTEGRITY_PLATFORM_KEYRING))
> > >  		rc = integrity_load_cert(INTEGRITY_KEYRING_PLATFORM, source,
> > >  					 data, len, perm);
> > >  
> > > -- 
> > > 2.31.1
> > 
> > Acked-by: Jarkko Sakkinen <jarkko@...nel.org>
>
> Hi Jarkko,
>
> Without the following two commits in your master branch, the last patch
> in this series "[PATCH v4 6/6] integrity: PowerVM support for loading
> third party code signing keys"   doesn't apply cleanly.
>
> - commit 409b465f8a83 ("integrity: Enforce digitalSignature usage in
> the ima and evm keyrings")
> - commit e34a6c7dd192 ("KEYS: DigitalSignature link restriction")
>
> If you're not planning on upstreaming this patch set, I'd appreciate
> your creating a topic branch with these two commits.

They reside now in my -next. I'll send PR for the next release Fri.

> -- 
> thanks,
>
> Mimi

BR, Jarkko