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Date: Fri, 5 Apr 2024 12:56:37 +0000
From: Eric Snowberg <eric.snowberg@...cle.com>
To: Mimi Zohar <zohar@...ux.ibm.com>
CC: "open list:SECURITY SUBSYSTEM" <linux-security-module@...r.kernel.org>,
        David Howells <dhowells@...hat.com>,
        David Woodhouse <dwmw2@...radead.org>,
        "herbert@...dor.apana.org.au" <herbert@...dor.apana.org.au>,
        "davem@...emloft.net" <davem@...emloft.net>,
        Ard Biesheuvel
	<ardb@...nel.org>, Jarkko Sakkinen <jarkko@...nel.org>,
        Paul Moore
	<paul@...l-moore.com>, James Morris <jmorris@...ei.org>,
        "Serge E. Hallyn"
	<serge@...lyn.com>,
        Roberto Sassu <roberto.sassu@...wei.com>,
        Dmitry Kasatkin
	<dmitry.kasatkin@...il.com>,
        Mickaël Salaün
	<mic@...ikod.net>,
        "casey@...aufler-ca.com" <casey@...aufler-ca.com>,
        Stefan
 Berger <stefanb@...ux.ibm.com>,
        open list <linux-kernel@...r.kernel.org>,
        "keyrings@...r.kernel.org" <keyrings@...r.kernel.org>,
        "linux-crypto@...r.kernel.org" <linux-crypto@...r.kernel.org>,
        "linux-efi@...r.kernel.org" <linux-efi@...r.kernel.org>,
        "linux-integrity@...r.kernel.org" <linux-integrity@...r.kernel.org>
Subject: Re: [PATCH RFC 1/8] certs: Introduce ability to link to a system key



> On Apr 4, 2024, at 4:40 PM, Mimi Zohar <zohar@...ux.ibm.com> wrote:
> 
> Hi Eric,
> 
>> diff --git a/certs/system_keyring.c b/certs/system_keyring.c
>> index 9de610bf1f4b..b647be49f6e0 100644
>> --- a/certs/system_keyring.c
>> +++ b/certs/system_keyring.c
>> @@ -426,3 +426,32 @@ void __init set_platform_trusted_keys(struct key
>> *keyring)
>> platform_trusted_keys = keyring;
>> }
>> #endif
>> +
>> +/**
>> + * system_key_link - Link to a system key
>> + * @keyring: The keyring to link into
>> + * @id: The asymmetric key id to look for in the system keyring
>> + */
>> +int system_key_link(struct key *keyring, struct asymmetric_key_id *id)
>> +{
>> + struct key *tkey;
>> +
>> +#ifdef CONFIG_SECONDARY_TRUSTED_KEYRING
>> + tkey = find_asymmetric_key(secondary_trusted_keys, id, NULL, NULL,
>> false);
>> +#else
>> + tkey = find_asymmetric_key(builtin_trusted_keys, id, NULL, NULL, false);
>> +#endif
>> + if (!IS_ERR(tkey))
>> + goto found;
>> +
>> + tkey = find_asymmetric_key(platform_trusted_keys, id, NULL, NULL,
>> false);
>> +
>> + if (!IS_ERR(tkey))
>> + goto found;
>> +
>> + return -1;
> 
> Normally "goto" is for the error.  Invert the logic. 

Ok, I'll change that in the next version.  Thanks.

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