From: Randy Dunlap <rdunlap@infradead.org>
To: Casey Schaufler <casey@schaufler-ca.com>,
casey.schaufler@intel.com, jmorris@namei.org,
linux-security-module@vger.kernel.org, selinux@vger.kernel.org
Cc: linux-audit@redhat.com, keescook@chromium.org,
john.johansen@canonical.com, penguin-kernel@i-love.sakura.ne.jp,
paul@paul-moore.com, sds@tycho.nsa.gov,
linux-api@vger.kernel.org
Subject: Re: [PATCH v20 22/23] LSM: Add /proc attr entry for full LSM context
Date: Wed, 26 Aug 2020 11:02:46 -0700 [thread overview]
Message-ID: <2e16e5dc-d040-8e8d-0fda-eb631b4b72e1@infradead.org> (raw)
In-Reply-To: <20200826145247.10029-23-casey@schaufler-ca.com>
Hi,
On 8/26/20 7:52 AM, Casey Schaufler wrote:
> diff --git a/Documentation/security/lsm.rst b/Documentation/security/lsm.rst
> index 6a2a2e973080..fd4c87358d54 100644
> --- a/Documentation/security/lsm.rst
> +++ b/Documentation/security/lsm.rst
> @@ -129,3 +129,31 @@ to identify it as the first security module to be registered.
> The capabilities security module does not use the general security
> blobs, unlike other modules. The reasons are historical and are
> based on overhead, complexity and performance concerns.
> +
> +LSM External Interfaces
> +=======================
> +
> +The LSM infrastructure does not generally provide external interfaces.
> +The individual security modules provide what external interfaces they
> +require.
> +
> +The file ``/sys/kernel/security/lsm`` provides a comma
> +separated list of the active security modules.
> +
> +The file ``/proc/pid/attr/display`` contains the name of the security
> +module for which the ``/proc/pid/attr/current`` interface will
> +apply. This interface can be written to.
> +
> +The infrastructure does provide an interface for the special
> +case where multiple security modules provide a process context.
> +This is provided in compound context format.
> +
> +- `lsm\0value\0lsm\0value\0`
> +
> +The `lsm` and `value` fields are nul terminated bytestrings.
Preferably NUL-terminated
> +Each field may contain whitespace or non-printable characters.
> +The nul bytes are included in the size of a compound context.
NUL
> +The context ``Bell\0Secret\0Biba\0Loose\0`` has a size of 23.
> +
> +The file ``/proc/pid/attr/context`` provides the security
> +context of the identified process.
thanks.
--
~Randy
Reported-by: Randy Dunlap <rdunlap@infradead.org>
next prev parent reply other threads:[~2020-08-26 18:03 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20200826145247.10029-1-casey.ref@schaufler-ca.com>
2020-08-26 14:52 ` [PATCH v20 00/23] LSM: Module stacking for AppArmor Casey Schaufler
2020-08-26 14:52 ` [PATCH v20 01/23] LSM: Infrastructure management of the sock security Casey Schaufler
2020-08-26 14:52 ` [PATCH v20 02/23] LSM: Create and manage the lsmblob data structure Casey Schaufler
2020-09-04 21:50 ` Paul Moore
2020-08-26 14:52 ` [PATCH v20 03/23] LSM: Use lsmblob in security_audit_rule_match Casey Schaufler
2020-09-04 18:53 ` Paul Moore
2020-08-26 14:52 ` [PATCH v20 04/23] LSM: Use lsmblob in security_kernel_act_as Casey Schaufler
2020-09-04 19:46 ` Paul Moore
2020-08-26 14:52 ` [PATCH v20 05/23] net: Prepare UDS for security module stacking Casey Schaufler
2020-09-03 16:28 ` James Morris
2020-09-04 20:08 ` Paul Moore
2020-09-04 21:35 ` Casey Schaufler
2020-09-04 21:53 ` Paul Moore
2020-09-04 23:58 ` Casey Schaufler
2020-09-05 13:25 ` Paul Moore
2020-09-05 18:13 ` Casey Schaufler
2020-09-05 19:05 ` John Johansen
2020-09-08 1:28 ` Stephen Smalley
2020-09-08 13:35 ` Stephen Smalley
2020-09-08 23:37 ` Casey Schaufler
2020-09-09 0:21 ` John Johansen
2020-09-09 13:19 ` Stephen Smalley
2020-09-09 18:19 ` Casey Schaufler
2020-09-09 18:33 ` John Johansen
2020-09-09 18:47 ` John Johansen
2020-09-10 14:11 ` Paul Moore
2020-09-09 0:17 ` John Johansen
2020-08-26 14:52 ` [PATCH v20 06/23] LSM: Use lsmblob in security_secctx_to_secid Casey Schaufler
2020-09-04 21:29 ` Paul Moore
2020-08-26 14:52 ` [PATCH v20 07/23] LSM: Use lsmblob in security_secid_to_secctx Casey Schaufler
2020-09-04 21:59 ` Paul Moore
2020-08-26 14:52 ` [PATCH v20 08/23] LSM: Use lsmblob in security_ipc_getsecid Casey Schaufler
2020-09-05 13:12 ` Paul Moore
2020-08-26 14:52 ` [PATCH v20 09/23] LSM: Use lsmblob in security_task_getsecid Casey Schaufler
2020-09-05 13:18 ` Paul Moore
2020-08-26 14:52 ` [PATCH v20 10/23] LSM: Use lsmblob in security_inode_getsecid Casey Schaufler
2020-09-05 13:20 ` Paul Moore
2020-08-26 14:52 ` [PATCH v20 11/23] LSM: Use lsmblob in security_cred_getsecid Casey Schaufler
2020-08-26 14:52 ` [PATCH v20 12/23] IMA: Change internal interfaces to use lsmblobs Casey Schaufler
2020-09-06 2:28 ` Paul Moore
2020-08-26 14:52 ` [PATCH v20 13/23] LSM: Specify which LSM to display Casey Schaufler
2020-08-26 14:52 ` [PATCH v20 14/23] LSM: Ensure the correct LSM context releaser Casey Schaufler
2020-09-06 2:45 ` Paul Moore
2020-08-26 14:52 ` [PATCH v20 15/23] LSM: Use lsmcontext in security_secid_to_secctx Casey Schaufler
2020-08-26 14:52 ` [PATCH v20 16/23] LSM: Use lsmcontext in security_inode_getsecctx Casey Schaufler
2020-09-06 2:55 ` Paul Moore
2020-08-26 14:52 ` [PATCH v20 17/23] LSM: security_secid_to_secctx in netlink netfilter Casey Schaufler
2020-09-06 3:11 ` Paul Moore
2020-09-08 10:46 ` Pablo Neira Ayuso
2020-08-26 14:52 ` [PATCH v20 18/23] NET: Store LSM netlabel data in a lsmblob Casey Schaufler
2020-09-06 3:27 ` Paul Moore
2020-08-26 14:52 ` [PATCH v20 19/23] LSM: Verify LSM display sanity in binder Casey Schaufler
2020-09-06 3:30 ` Paul Moore
2020-08-26 14:52 ` [PATCH v20 20/23] Audit: Add new record for multiple process LSM attributes Casey Schaufler
2020-09-03 16:32 ` James Morris
2020-09-03 17:00 ` John Johansen
2020-09-03 21:49 ` Paul Moore
2020-09-06 16:32 ` Paul Moore
2020-08-26 14:52 ` [PATCH v20 21/23] Audit: Add a new record for multiple object " Casey Schaufler
2020-08-26 14:52 ` [PATCH v20 22/23] LSM: Add /proc attr entry for full LSM context Casey Schaufler
2020-08-26 18:02 ` Randy Dunlap [this message]
2020-08-26 14:52 ` [PATCH v20 23/23] AppArmor: Remove the exclusive flag Casey Schaufler
2020-08-26 15:27 ` [PATCH v20 00/23] LSM: Module stacking for AppArmor Casey Schaufler
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