From: Andy Shevchenko <andy.shevchenko@gmail.com>
To: Lenny Szubowicz <lszubowi@redhat.com>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
linux-efi <linux-efi@vger.kernel.org>,
Platform Driver <platform-driver-x86@vger.kernel.org>,
linux-security-module <linux-security-module@vger.kernel.org>,
Ard Biesheuvel <ardb@kernel.org>,
James Morris <jmorris@namei.org>,
"Serge E. Hallyn" <serge@hallyn.com>,
Kees Cook <keescook@chromium.org>,
Mimi Zohar <zohar@linux.ibm.com>, Borislav Petkov <bp@alien8.de>,
Peter Jones <pjones@redhat.com>,
David Howells <dhowells@redhat.com>,
Prarit Bhargava <prarit@redhat.com>
Subject: Re: [PATCH 2/3] integrity: Move import of MokListRT certs to a separate routine
Date: Wed, 2 Sep 2020 10:55:21 +0300 [thread overview]
Message-ID: <CAHp75Vec0a3LC7dGY6wacQu0brc+Zjfowt6kGdcZ9sfMzoDR9g@mail.gmail.com> (raw)
In-Reply-To: <20200826034455.28707-3-lszubowi@redhat.com>
On Wed, Aug 26, 2020 at 6:45 AM Lenny Szubowicz <lszubowi@redhat.com> wrote:
>
> Move the loading of certs from the UEFI MokListRT into a separate
> routine to facilitate additional MokList functionality.
>
> There is no visible functional change as a result of this patch.
> Although the UEFI dbx certs are now loaded before the MokList certs,
> they are loaded onto different key rings. So the order of the keys
> on their respective key rings is the same.
...
> /*
> + * load_moklist_certs() - Load MokList certs
> + *
> + * Returns: Summary error status
> + *
> + * Load the certs contained in the UEFI MokListRT database into the
> + * platform trusted keyring.
> + */
Hmm... Is it intentionally kept out of kernel doc format?
> +static int __init load_moklist_certs(void)
> +{
> + efi_guid_t mok_var = EFI_SHIM_LOCK_GUID;
> + void *mok = NULL;
> + unsigned long moksize = 0;
> + efi_status_t status;
> + int rc = 0;
Redundant assignment (see below).
> + /* Get MokListRT. It might not exist, so it isn't an error
> + * if we can't get it.
> + */
> + mok = get_cert_list(L"MokListRT", &mok_var, &moksize, &status);
> + if (!mok) {
Why not positive conditional? Sometimes ! is hard to notice.
> + if (status == EFI_NOT_FOUND)
> + pr_debug("MokListRT variable wasn't found\n");
> + else
> + pr_info("Couldn't get UEFI MokListRT\n");
> + } else {
> + rc = parse_efi_signature_list("UEFI:MokListRT",
> + mok, moksize, get_handler_for_db);
> + if (rc)
> + pr_err("Couldn't parse MokListRT signatures: %d\n", rc);
> + kfree(mok);
kfree(...)
if (rc)
...
return rc;
And with positive conditional there will be no need to have redundant
'else' followed by additional level of indentation.
> + }
> + return rc;
return 0;
> +}
P.S. Yes, I see that the above was in the original code, so, consider
my comments as suggestions to improve the code.
--
With Best Regards,
Andy Shevchenko
next prev parent reply other threads:[~2020-09-02 7:55 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-26 3:44 [PATCH 0/3] integrity: Load certs from EFI MOK config table Lenny Szubowicz
2020-08-26 3:44 ` [PATCH 1/3] efi: Support for MOK variable " Lenny Szubowicz
2020-08-26 3:44 ` [PATCH 2/3] integrity: Move import of MokListRT certs to a separate routine Lenny Szubowicz
2020-09-01 20:48 ` Mimi Zohar
2020-09-02 7:55 ` Andy Shevchenko [this message]
2020-09-05 0:57 ` Lenny Szubowicz
2020-08-26 3:44 ` [PATCH 3/3] integrity: Load certs from the EFI MOK config table Lenny Szubowicz
2020-08-26 11:55 ` [PATCH 0/3] integrity: Load certs from " Mimi Zohar
2020-09-05 1:30 ` Lenny Szubowicz
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