linux-kernel - Re: [PATCH v4 0/2] let kexec_file_load use platform keyring to verify the kernel image

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Date:   Fri, 18 Jan 2019 20:34:37 +0800
From:   Dave Young <dyoung@...hat.com>
To:     Mimi Zohar <zohar@...ux.ibm.com>
Cc:     Kairui Song <kasong@...hat.com>, linux-kernel@...r.kernel.org,
        dhowells@...hat.com, dwmw2@...radead.org,
        jwboyer@...oraproject.org, keyrings@...r.kernel.org,
        jmorris@...ei.org, serge@...lyn.com, bauerman@...ux.ibm.com,
        ebiggers@...gle.com, nayna@...ux.ibm.com,
        linux-integrity@...r.kernel.org, kexec@...ts.infradead.org
Subject: Re: [PATCH v4 0/2] let kexec_file_load use platform keyring to
 verify the kernel image

On 01/18/19 at 06:53am, Mimi Zohar wrote:
> On Fri, 2019-01-18 at 17:17 +0800, Kairui Song wrote:
> > This patch series adds a .platform_trusted_keys in system_keyring as the
> > reference to .platform keyring in integrity subsystem, when platform
> > keyring is being initialized it will be updated. So other component could
> > use this keyring as well.
> 
> Kairui, when people review patches, the comments could be specific,
> but are normally generic.  My review included a couple of generic
> suggestions - not to use "#ifdef" in C code (eg. is_enabled), use the
> term "preboot" keys, and remove any references to "other components".
> 
> After all the wording suggestions I've made, you are still saying, "So
> other components could use this keyring as well".  Really?!  How the
> platform keyring will be used in the future, is up to you and others
> to convince Linus.  At least for now, please limit its usage to
> verifying the PE signed kernel image.  If this patch set needs to be
> reposted, please remove all references to "other components".
> 
> Dave/David, are you ok with Kairui's usage of "#ifdef's"?  Dave, you
> Acked the original post.  Can I include it?  Can we get some
> additional Ack's on these patches?

It is better to update patch to use IS_ENABLED in patch 1/2 as well.
Other than that, for kexec part I'm fine with an ack.
 
Thanks
Dave