linux-kernel - Re: [PATCH v7 11/17] KEYS: Introduce link restriction for machine keys

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Message-ID: <FEEBC8B5-EF20-41A7-9883-018C6B25C6B6@oracle.com>
Date:   Fri, 19 Nov 2021 02:50:11 +0000
From:   Eric Snowberg <eric.snowberg@...cle.com>
To:     Mimi Zohar <zohar@...ux.ibm.com>
CC:     "keyrings@...r.kernel.org" <keyrings@...r.kernel.org>,
        "linux-integrity@...r.kernel.org" <linux-integrity@...r.kernel.org>,
        "dhowells@...hat.com" <dhowells@...hat.com>,
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        Jarkko Sakkinen <jarkko@...nel.org>,
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        Konrad Wilk <konrad.wilk@...cle.com>
Subject: Re: [PATCH v7 11/17] KEYS: Introduce link restriction for machine
 keys



> On Nov 18, 2021, at 5:20 PM, Mimi Zohar <zohar@...ux.ibm.com> wrote:
> 
> Hi Eric,
> 
> On Mon, 2021-11-15 at 19:15 -0500, Eric Snowberg wrote:
>> Introduce a new link restriction that includes the trusted builtin,
>> secondary and machine keys. The restriction is based on the key to be
>> added being vouched for by a key in any of these three keyrings.
>> 
>> Suggested-by: Mimi Zohar <zohar@...ux.ibm.com>
>> Signed-off-by: Eric Snowberg <eric.snowberg@...cle.com>
>> ---
>> v3: Initial version
>> v4: moved code under CONFIG_INTEGRITY_MOK_KEYRING
>> v5: Rename to machine keyring
>> v6: Change subject name (suggested by Mimi)
>>    Rename restrict_link_by_builtin_secondary_and_ca_trusted
>>      to restrict_link_by_builtin_secondary_and_machine (suggested by
>>      Mimi)
>> v7: Unmodified from v6
>> ---
>> certs/system_keyring.c        | 23 +++++++++++++++++++++++
>> include/keys/system_keyring.h |  6 ++++++
>> 2 files changed, 29 insertions(+)
>> 
>> diff --git a/certs/system_keyring.c b/certs/system_keyring.c
>> index bc7e44fc82c2..71a00add9805 100644
>> --- a/certs/system_keyring.c
>> +++ b/certs/system_keyring.c
>> @@ -99,6 +99,29 @@ void __init set_machine_trusted_keys(struct key *keyring)
>> {
>> 	machine_trusted_keys = keyring;
>> }
>> +
>> +/**
> 
> This begins the start of kernel doc. 
> 
>> + * restrict_link_by_builtin_secondary_and_machine
> 
> Missing are the parameter defintions.  Please refer to
> Documentation/doc-guide/kernel-doc.rst for details.

I’ll add this in the next round, thanks.