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From: Deven Bowers <deven.desai@linux.microsoft.com>
To: agk@redhat.com, axboe@kernel.dk, snitzer@redhat.com,
	jmorris@namei.org, serge@hallyn.com, zohar@linux.ibm.com,
	viro@zeniv.linux.org.uk, paul@paul-moore.com, eparis@redhat.com,
	jannh@google.com, dm-devel@redhat.com,
	linux-integrity@vger.kernel.org,
	linux-security-module@vger.kernel.org,
	linux-fsdevel@vger.kernel.org, linux-block@vger.kernel.org,
	linux-audit@redhat.com
Cc: tyhicks@linux.microsoft.com, linux-kernel@vger.kernel.org,
	corbet@lwn.net, sashal@kernel.org,
	jaskarankhurana@linux.microsoft.com, mdsakib@microsoft.com,
	nramas@linux.microsoft.com, pasha.tatashin@soleen.com
Subject: [RFC PATCH v5 07/11] dm-verity: add bdev_setsecurity hook for dm-verity signature
Date: Tue, 28 Jul 2020 14:36:07 -0700
Message-ID: <20200728213614.586312-8-deven.desai@linux.microsoft.com> (raw)
In-Reply-To: <20200728213614.586312-1-deven.desai@linux.microsoft.com>

Add a security hook call to set a security property of a block_device
in dm-verity with the results of a verified, signed root-hash.

Signed-off-by: Deven Bowers <deven.desai@linux.microsoft.com>
---
 drivers/md/dm-verity-verify-sig.c | 7 +++++++
 include/linux/device-mapper.h     | 2 ++
 2 files changed, 9 insertions(+)

diff --git a/drivers/md/dm-verity-verify-sig.c b/drivers/md/dm-verity-verify-sig.c
index 27dac8aa2e5a..242e2421d3c8 100644
--- a/drivers/md/dm-verity-verify-sig.c
+++ b/drivers/md/dm-verity-verify-sig.c
@@ -8,7 +8,10 @@
 #include <linux/device-mapper.h>
 #include <linux/verification.h>
 #include <keys/user-type.h>
+#include <linux/security.h>
+#include <linux/list.h>
 #include <linux/module.h>
+#include "dm-core.h"
 #include "dm-verity.h"
 #include "dm-verity-verify-sig.h"
 
@@ -182,6 +185,10 @@ int verity_verify_root_hash(const struct dm_verity *v)
 		goto cleanup;
 
 	sig_target->passed = true;
+
+	ret = security_bdev_setsecurity(dm_table_get_md(v->ti->table)->bdev,
+					DM_VERITY_SIGNATURE_SEC_NAME,
+					v->sig->sig, v->sig->sig_size);
 cleanup:
 	kfree(root_hash);
 	return ret;
diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h
index 8750f2dc5613..02be0be21d38 100644
--- a/include/linux/device-mapper.h
+++ b/include/linux/device-mapper.h
@@ -624,4 +624,6 @@ static inline unsigned long to_bytes(sector_t n)
 	return (n << SECTOR_SHIFT);
 }
 
+#define DM_VERITY_SIGNATURE_SEC_NAME DM_NAME	".verity-sig"
+
 #endif	/* _LINUX_DEVICE_MAPPER_H */
-- 
2.27.0


  parent reply index

Thread overview: 61+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-28 21:36 [RFC PATCH v5 00/11] Integrity Policy Enforcement LSM (IPE) Deven Bowers
2020-07-28 21:36 ` [RFC PATCH v5 01/11] scripts: add ipe tooling to generate boot policy Deven Bowers
2020-07-28 21:36 ` [RFC PATCH v5 02/11] security: add ipe lsm evaluation loop and audit system Deven Bowers
2020-07-28 21:36 ` [RFC PATCH v5 03/11] security: add ipe lsm policy parser and policy loading Deven Bowers
2020-07-28 21:36 ` [RFC PATCH v5 04/11] ipe: add property for trust of boot volume Deven Bowers
2020-07-28 21:36 ` [RFC PATCH v5 05/11] fs: add security blob and hooks for block_device Deven Bowers
2020-07-28 22:22   ` Casey Schaufler
2020-07-28 22:40     ` Al Viro
2020-07-28 23:55       ` Deven Bowers
2020-07-28 21:36 ` [RFC PATCH v5 06/11] dm-verity: move signature check after tree validation Deven Bowers
2020-07-28 21:50   ` Eric Biggers
2020-07-28 23:55     ` Deven Bowers
2020-07-28 21:36 ` Deven Bowers [this message]
2020-07-28 21:36 ` [RFC PATCH v5 08/11] ipe: add property for signed dmverity volumes Deven Bowers
2020-07-28 21:36 ` [RFC PATCH v5 09/11] dm-verity: add bdev_setsecurity hook for root-hash Deven Bowers
2020-07-28 21:36 ` [RFC PATCH v5 10/11] documentation: add ipe documentation Deven Bowers
2020-07-28 21:36 ` [RFC PATCH v5 10/12] ipe: add property for dmverity roothash Deven Bowers
2020-07-28 21:36 ` [RFC PATCH v5 11/11] cleanup: uapi/linux/audit.h Deven Bowers
2020-07-28 21:36 ` [RFC PATCH v5 11/12] documentation: add ipe documentation Deven Bowers
2020-07-28 21:36 ` [RFC PATCH v5 12/12] cleanup: uapi/linux/audit.h Deven Bowers
2020-08-02 11:55 ` [RFC PATCH v5 00/11] Integrity Policy Enforcement LSM (IPE) Pavel Machek
2020-08-02 14:03   ` Sasha Levin
2020-08-02 14:31     ` Pavel Machek
2020-08-02 16:43       ` [dm-devel] " James Bottomley
2020-08-04 16:07         ` Deven Bowers
2020-08-05 15:01           ` James Bottomley
2020-08-05 16:59             ` James Morris
2020-08-05 18:15               ` Mimi Zohar
2020-08-05 23:51                 ` James Morris
2020-08-06 14:33                   ` Mimi Zohar
2020-08-07 16:41                     ` James Morris
2020-08-07 17:31                       ` Mimi Zohar
2020-08-07 18:40                         ` Mimi Zohar
2020-08-10 20:29                           ` James Morris
2020-08-08 17:47                 ` Chuck Lever
2020-08-09 17:16                   ` Mimi Zohar
2020-08-10 15:35                     ` James Bottomley
2020-08-10 16:35                       ` Mimi Zohar
2020-08-10 17:13                         ` James Bottomley
2020-08-10 17:57                           ` Mimi Zohar
2020-08-10 23:36                       ` Chuck Lever
2020-08-11  5:43                         ` James Bottomley
2020-08-11 14:48                           ` Chuck Lever
2020-08-11 15:32                             ` James Bottomley
2020-08-11 19:30                               ` Pavel Machek
2020-08-12 14:45                               ` Chuck Lever
2020-08-11 15:53                             ` James Bottomley
2020-08-12 14:15                               ` Chuck Lever
2020-08-12 15:51                                 ` James Bottomley
2020-08-13 14:42                                   ` Chuck Lever
2020-08-13 15:10                                     ` James Bottomley
2020-08-14 14:21                                       ` Chuck Lever
2020-08-11 18:28                             ` James Bottomley
2020-08-12 13:56                               ` Chuck Lever
2020-08-12 15:42                                 ` James Bottomley
2020-08-13 14:21                                   ` Chuck Lever
2020-08-13 14:42                                     ` James Bottomley
2020-08-13 14:56                                       ` Chuck Lever
2020-08-11 21:03                   ` James Morris
2020-08-12 14:18                     ` Chuck Lever
2020-08-12 17:07                       ` Deven Bowers

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