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,
glin@suse.com, konrad.wilk@oracle.com
Subject: [PATCH v3 12/14] integrity: Do not allow mok keyring updates following init
Date: Wed, 11 Aug 2021 22:18:53 -0400 [thread overview]
Message-ID: <20210812021855.3083178-13-eric.snowberg@oracle.com> (raw)
In-Reply-To: <20210812021855.3083178-1-eric.snowberg@oracle.com>
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
v3: Unmodified from v2
---
security/integrity/digsig.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/security/integrity/digsig.c b/security/integrity/digsig.c
index ec94d564c68a..0601ef458e03 100644
--- a/security/integrity/digsig.c
+++ b/security/integrity/digsig.c
@@ -145,7 +145,8 @@ int __init integrity_init_keyring(const unsigned int id)
else
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);
--
2.18.4
next prev parent reply other threads:[~2021-08-12 2:21 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-12 2:18 [PATCH v3 00/14] Enroll kernel keys thru MOK Eric Snowberg
2021-08-12 2:18 ` [PATCH v3 01/14] integrity: Introduce a Linux keyring for the Machine Owner Key (MOK) Eric Snowberg
2021-08-12 18:58 ` Jarkko Sakkinen
2021-08-12 22:16 ` Eric Snowberg
2021-08-13 18:26 ` Nayna
2021-08-12 21:31 ` Mimi Zohar
2021-08-12 22:36 ` Eric Snowberg
2021-08-13 0:35 ` Mimi Zohar
2021-08-12 2:18 ` [PATCH v3 02/14] KEYS: CA link restriction Eric Snowberg
2021-08-12 2:18 ` [PATCH v3 03/14] integrity: Trust MOK keys if MokListTrustedRT found Eric Snowberg
2021-08-12 2:18 ` [PATCH v3 04/14] integrity: add add_to_mok_keyring Eric Snowberg
2021-08-12 19:32 ` Jarkko Sakkinen
2021-08-12 22:04 ` Eric Snowberg
2021-08-12 2:18 ` [PATCH v3 05/14] integrity: restrict INTEGRITY_KEYRING_MOK to restrict_link_by_ca Eric Snowberg
2021-08-12 2:18 ` [PATCH v3 06/14] integrity: accessor function to get trust_moklist Eric Snowberg
2021-08-12 2:18 ` [PATCH v3 07/14] integrity: add new keyring handler for mok keys Eric Snowberg
2021-08-12 2:18 ` [PATCH v3 08/14] KEYS: add a reference to mok keyring Eric Snowberg
2021-08-12 2:18 ` [PATCH v3 09/14] KEYS: Introduce link restriction to include builtin, secondary and mok keys Eric Snowberg
2021-08-12 2:18 ` [PATCH v3 10/14] KEYS: change link restriction for secondary to also trust mok Eric Snowberg
2021-08-12 19:46 ` Mimi Zohar
2021-08-12 22:10 ` Eric Snowberg
2021-08-12 22:14 ` Mimi Zohar
2021-08-12 2:18 ` [PATCH v3 11/14] KEYS: link secondary_trusted_keys to mok trusted keys Eric Snowberg
2021-08-12 2:18 ` Eric Snowberg [this message]
2021-08-12 2:18 ` [PATCH v3 13/14] integrity: store reference to mok keyring Eric Snowberg
2021-08-12 2:18 ` [PATCH v3 14/14] integrity: change ima link restriction to include mok keys Eric Snowberg
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