From: Fan Wu <wufan@linux.microsoft.com>
To: corbet@lwn.net, zohar@linux.ibm.com, jmorris@namei.org,
serge@hallyn.com, tytso@mit.edu, ebiggers@kernel.org,
axboe@kernel.dk, agk@redhat.com, snitzer@kernel.org,
eparis@redhat.com, paul@paul-moore.com
Cc: linux-doc@vger.kernel.org, linux-integrity@vger.kernel.org,
linux-security-module@vger.kernel.org,
linux-fscrypt@vger.kernel.org, linux-block@vger.kernel.org,
dm-devel@lists.linux.dev, audit@vger.kernel.org,
linux-kernel@vger.kernel.org, Fan Wu <wufan@linux.microsoft.com>
Subject: [RFC PATCH v13 12/20] dm verity: set DM_TARGET_SINGLETON feature flag
Date: Wed, 28 Feb 2024 16:54:54 -0800 [thread overview]
Message-ID: <1709168102-7677-13-git-send-email-wufan@linux.microsoft.com> (raw)
In-Reply-To: <1709168102-7677-1-git-send-email-wufan@linux.microsoft.com>
The device-mapper has a flag to mark targets as singleton, which is a
required flag for immutable targets. Without this flag, multiple
dm-verity targets can be added to a mapped device, which has no
practical use cases. Also from dm_table_get_immutable_target(),
it documented that "Immutable target is implicitly a singleton".
This patch adds the missing flag, restricting only one
dm-verity target per mapped device.
Signed-off-by: Fan Wu <wufan@linux.microsoft.com>
---
v1-v10:
+ Not present
v11:
+ Introduced
v12:
+ No changes
v13:
+ No changes
---
drivers/md/dm-verity-target.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/md/dm-verity-target.c b/drivers/md/dm-verity-target.c
index 1b591bfa90d5..a99ef30e45ca 100644
--- a/drivers/md/dm-verity-target.c
+++ b/drivers/md/dm-verity-target.c
@@ -1559,7 +1559,7 @@ int dm_verity_get_root_digest(struct dm_target *ti, u8 **root_digest, unsigned i
static struct target_type verity_target = {
.name = "verity",
- .features = DM_TARGET_IMMUTABLE,
+ .features = DM_TARGET_SINGLETON | DM_TARGET_IMMUTABLE,
.version = {1, 10, 0},
.module = THIS_MODULE,
.ctr = verity_ctr,
--
2.43.1
next prev parent reply other threads:[~2024-02-29 0:55 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-29 0:54 [RFC PATCH v13 00/20] Integrity Policy Enforcement LSM (IPE) Fan Wu
2024-02-29 0:54 ` [RFC PATCH v13 01/20] security: add ipe lsm Fan Wu
2024-02-29 0:54 ` [RFC PATCH v13 02/20] ipe: add policy parser Fan Wu
2024-02-29 0:54 ` [RFC PATCH v13 03/20] ipe: add evaluation loop Fan Wu
2024-02-29 0:54 ` [RFC PATCH v13 04/20] ipe: add LSM hooks on execution and kernel read Fan Wu
2024-02-29 0:54 ` [RFC PATCH v13 05/20] initramfs|security: Add a security hook to do_populate_rootfs() Fan Wu
2024-02-29 0:54 ` [RFC PATCH v13 06/20] ipe: introduce 'boot_verified' as a trust provider Fan Wu
2024-02-29 0:54 ` [RFC PATCH v13 07/20] security: add new securityfs delete function Fan Wu
2024-02-29 0:54 ` [RFC PATCH v13 08/20] ipe: add userspace interface Fan Wu
2024-02-29 0:54 ` [RFC PATCH v13 09/20] uapi|audit|ipe: add ipe auditing support Fan Wu
2024-02-29 0:54 ` [RFC PATCH v13 10/20] ipe: add permissive toggle Fan Wu
2024-02-29 0:54 ` [RFC PATCH v13 11/20] block|security: add LSM blob to block_device Fan Wu
2024-02-29 0:54 ` Fan Wu [this message]
2024-03-02 16:01 ` [RFC PATCH v13 12/20] dm verity: set DM_TARGET_SINGLETON feature flag Mike Snitzer
2024-02-29 0:54 ` [RFC PATCH v13 13/20] dm: add finalize hook to target_type Fan Wu
2024-03-02 16:13 ` Mike Snitzer
2024-02-29 0:54 ` [RFC PATCH v13 14/20] dm verity: consume root hash digest and signature data via LSM hook Fan Wu
2024-03-02 16:22 ` Mike Snitzer
2024-03-02 16:37 ` Mike Snitzer
2024-02-29 0:54 ` [RFC PATCH v13 15/20] ipe: add support for dm-verity as a trust provider Fan Wu
2024-02-29 0:54 ` [RFC PATCH v13 16/20] fsverity: consume builtin signature via LSM hook Fan Wu
2024-02-29 0:54 ` [RFC PATCH v13 17/20] ipe: enable support for fs-verity as a trust provider Fan Wu
2024-02-29 4:01 ` Randy Dunlap
2024-02-29 4:46 ` Eric Biggers
2024-02-29 18:59 ` Fan Wu
2024-02-29 19:42 ` Eric Biggers
2024-02-29 19:59 ` Fan Wu
2024-02-29 0:55 ` [RFC PATCH v13 18/20] scripts: add boot policy generation program Fan Wu
2024-02-29 0:55 ` [RFC PATCH v13 19/20] ipe: kunit test for parser Fan Wu
2024-02-29 0:55 ` [RFC PATCH v13 20/20] documentation: add ipe documentation Fan Wu
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