| Message ID | 20210819002109.534600-3-eric.snowberg@oracle.com |
|---|---|
| State | Superseded |
| Headers | show
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Thu, 19 Aug 2021 00:21:30 +0000 From: Eric Snowberg <eric.snowberg@oracle.com> To: keyrings@vger.kernel.org, linux-integrity@vger.kernel.org, zohar@linux.ibm.com, dhowells@redhat.com, dwmw2@infradead.org, herbert@gondor.apana.org.au, davem@davemloft.net, jarkko@kernel.org, jmorris@namei.org, serge@hallyn.com Cc: eric.snowberg@oracle.com, keescook@chromium.org, gregkh@linuxfoundation.org, torvalds@linux-foundation.org, scott.branden@broadcom.com, weiyongjun1@huawei.com, nayna@linux.ibm.com, ebiggers@google.com, ardb@kernel.org, nramas@linux.microsoft.com, lszubowi@redhat.com, linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org, linux-security-module@vger.kernel.org, James.Bottomley@HansenPartnership.com, pjones@redhat.com, konrad.wilk@oracle.com Subject: [PATCH v4 02/12] integrity: Do not allow mok keyring updates following init Date: Wed, 18 Aug 2021 20:20:59 -0400 Message-Id: <20210819002109.534600-3-eric.snowberg@oracle.com> X-Mailer: git-send-email 2.18.4 In-Reply-To: <20210819002109.534600-1-eric.snowberg@oracle.com> References: <20210819002109.534600-1-eric.snowberg@oracle.com> Content-Type: text/plain X-ClientProxiedBy: SN4PR0401CA0025.namprd04.prod.outlook.com (2603:10b6:803:2a::11) To CH2PR10MB4150.namprd10.prod.outlook.com (2603:10b6:610:ac::13) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from localhost.us.oracle.com (148.87.23.4) by SN4PR0401CA0025.namprd04.prod.outlook.com (2603:10b6:803:2a::11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4436.19 via Frontend Transport; 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| Series |
Enroll kernel keys thru MOK
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expand
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diff --git a/security/integrity/digsig.c b/security/integrity/digsig.c index e07334504ef1..5cad38e6f56a 100644 --- a/security/integrity/digsig.c +++ b/security/integrity/digsig.c @@ -140,7 +140,8 @@ int __init integrity_init_keyring(const unsigned int id) return -ENOMEM; restriction->check = restrict_link_to_ima; - perm |= KEY_USR_WRITE; + if (id != INTEGRITY_KEYRING_MOK) + perm |= KEY_USR_WRITE; out: return __integrity_init_keyring(id, perm, restriction);
The mok keyring is setup during init. No additional keys should be allowed to be added afterwards. Leave the permission as read only. Signed-off-by: Eric Snowberg <eric.snowberg@oracle.com> --- v2: Initial version v4: Unmodified from v2 --- security/integrity/digsig.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)