From: Nayna Jain <nayna@linux.vnet.ibm.com>
To: Lakshmi Ramasubramanian <nramas@linux.microsoft.com>,
Nayna Jain <nayna@linux.ibm.com>,
linuxppc-dev@ozlabs.org, linux-efi@vger.kernel.org,
linux-integrity@vger.kernel.org
Cc: linux-kernel@vger.kernel.org,
Michael Ellerman <mpe@ellerman.id.au>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
Ard Biesheuvel <ard.biesheuvel@linaro.org>,
Jeremy Kerr <jk@ozlabs.org>,
Matthew Garret <matthew.garret@nebula.com>,
Mimi Zohar <zohar@linux.ibm.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Claudio Carvalho <cclaudio@linux.ibm.com>,
George Wilson <gcwilson@linux.ibm.com>,
Elaine Palmer <erpalmer@us.ibm.com>,
Eric Ricther <erichte@linux.ibm.com>,
"Oliver O'Halloran" <oohall@gmail.com>,
Prakhar Srivastava <prsriva02@gmail.com>
Subject: Re: [PATCH v9 1/8] powerpc: detect the secure boot mode of the system
Date: Fri, 25 Oct 2019 11:49:37 -0500 [thread overview]
Message-ID: <569f401a-4327-4295-677f-48037f2582a0@linux.vnet.ibm.com> (raw)
In-Reply-To: <b0282ef2-f75c-a139-9991-01eba15adb22@linux.microsoft.com>
On 10/24/19 12:26 PM, Lakshmi Ramasubramanian wrote:
> On 10/23/2019 8:47 PM, Nayna Jain wrote:
>> This patch defines a function to detect the secure boot state of a
>> PowerNV system.
>
>> +bool is_ppc_secureboot_enabled(void)
>> +{
>> + struct device_node *node;
>> + bool enabled = false;
>> +
>> + node = of_find_compatible_node(NULL, NULL, "ibm,secvar-v1");
>> + if (!of_device_is_available(node)) {
>> + pr_err("Cannot find secure variable node in device tree;
>> failing to secure state\n");
>> + goto out;
>
> Related to "goto out;" above:
>
> Would of_find_compatible_node return NULL if the given node is not found?
>
> If of_device_is_available returns false (say, because node is NULL or
> it does not find the specified node) would it be correct to call
> of_node_put?
of_node_put() handles NULL.
Thanks & Regards,
- Nayna
next prev parent reply other threads:[~2019-10-25 16:50 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-24 3:47 [PATCH v9 0/8] powerpc: Enabling IMA arch specific secure boot policies Nayna Jain
2019-10-24 3:47 ` [PATCH v9 1/8] powerpc: detect the secure boot mode of the system Nayna Jain
2019-10-24 17:26 ` Lakshmi Ramasubramanian
2019-10-25 16:49 ` Nayna Jain [this message]
2019-10-24 3:47 ` [PATCH v9 2/8] powerpc/ima: add support to initialize ima policy rules Nayna Jain
2019-10-24 17:35 ` Lakshmi Ramasubramanian
2019-10-25 17:02 ` Nayna Jain
2019-10-25 18:03 ` Lakshmi Ramasubramanian
2019-10-28 23:42 ` Michael Ellerman
2019-10-26 23:52 ` Mimi Zohar
2019-10-28 11:54 ` Mimi Zohar
2019-10-24 3:47 ` [PATCH v9 3/8] powerpc: detect the trusted boot state of the system Nayna Jain
2019-10-24 17:38 ` Lakshmi Ramasubramanian
2019-10-25 16:50 ` Nayna Jain
2019-10-24 3:47 ` [PATCH v9 4/8] powerpc/ima: define trusted boot policy Nayna Jain
2019-10-24 17:40 ` Lakshmi Ramasubramanian
2019-10-24 3:47 ` [PATCH v9 5/8] ima: make process_buffer_measurement() generic Nayna Jain
2019-10-24 15:20 ` Lakshmi Ramasubramanian
2019-10-25 17:24 ` Nayna Jain
2019-10-25 17:32 ` Lakshmi Ramasubramanian
2019-10-27 0:13 ` Mimi Zohar
2019-10-30 15:22 ` Lakshmi Ramasubramanian
2019-10-30 16:35 ` Mimi Zohar
2019-10-24 3:47 ` [PATCH v9 6/8] certs: add wrapper function to check blacklisted binary hash Nayna Jain
2019-10-24 3:47 ` [PATCH v9 7/8] ima: check against blacklisted hashes for files with modsig Nayna Jain
2019-10-24 17:48 ` Lakshmi Ramasubramanian
2019-10-25 17:36 ` Nayna Jain
2019-10-24 3:47 ` [PATCH v9 8/8] powerpc/ima: update ima arch policy to check for blacklist Nayna Jain
2019-10-28 12:10 ` [PATCH v9 0/8] powerpc: Enabling IMA arch specific secure boot policies Mimi Zohar
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