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From: Kees Cook <keescook@chromium.org>
To: James Morris <jmorris@namei.org>
Cc: Kees Cook <keescook@chromium.org>,
	Casey Schaufler <casey@schaufler-ca.com>,
	John Johansen <john.johansen@canonical.com>,
	Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>,
	Paul Moore <paul@paul-moore.com>,
	Stephen Smalley <sds@tycho.nsa.gov>,
	"Schaufler, Casey" <casey.schaufler@intel.com>,
	LSM <linux-security-module@vger.kernel.org>,
	Jonathan Corbet <corbet@lwn.net>,
	linux-doc@vger.kernel.org, linux-arch@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH security-next v2 20/26] LSM: Introduce "lsm.order=" for boottime ordering
Date: Thu, 20 Sep 2018 09:23:32 -0700	[thread overview]
Message-ID: <20180920162338.21060-21-keescook@chromium.org> (raw)
In-Reply-To: <20180920162338.21060-1-keescook@chromium.org>

Provide a way to reorder LSM initialization using the new "lsm.order="
comma-separated list of LSMs. Any LSMs not listed will be added in builtin
order.

Signed-off-by: Kees Cook <keescook@chromium.org>
---
 Documentation/admin-guide/kernel-parameters.txt |  5 +++++
 security/security.c                             | 15 ++++++++++++++-
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 32d323ee9218..5ac4c1056ffa 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -2276,6 +2276,11 @@
 
 	lsm.debug	[SECURITY] Enable LSM initialization debugging output.
 
+	lsm.order=lsm1,...,lsmN
+			[SECURITY] Choose order of LSM initialization. Any
+			builtin LSMs not listed here will be implicitly
+			added to the list in builtin order.
+
 	machvec=	[IA-64] Force the use of a particular machine-vector
 			(machvec) in a generic kernel.
 			Example: machvec=hpzx1_swiotlb
diff --git a/security/security.c b/security/security.c
index 063ee2466e58..4db194f81419 100644
--- a/security/security.c
+++ b/security/security.c
@@ -43,6 +43,7 @@ static ATOMIC_NOTIFIER_HEAD(lsm_notifier_chain);
 char *lsm_names;
 /* Boot-time LSM user choice */
 static __initdata const char *chosen_major_lsm;
+static __initdata const char *chosen_lsm_order;
 
 static __initconst const char * const builtin_lsm_order = CONFIG_LSM_ORDER;
 
@@ -136,11 +137,15 @@ static void __init parse_lsm_order(const char *order, const char *origin)
 	kfree(sep);
 }
 
-/* Populate ordered LSMs list from builtin list of LSMs. */
+/* Populate ordered LSMs list from commandline and builtin list of LSMs. */
 static void __init prepare_lsm_order(void)
 {
 	struct lsm_info *lsm;
 
+	/* Parse order from commandline, if present. */
+	if (chosen_lsm_order)
+		parse_lsm_order(chosen_lsm_order, "cmdline");
+
 	/* Parse order from builtin list. */
 	parse_lsm_order(builtin_lsm_order, "builtin");
 
@@ -264,6 +269,14 @@ static int __init choose_major_lsm(char *str)
 }
 __setup("security=", choose_major_lsm);
 
+/* Explicitly choose LSM initialization order. */
+static int __init choose_lsm_order(char *str)
+{
+	chosen_lsm_order = str;
+	return 1;
+}
+__setup("lsm.order=", choose_lsm_order);
+
 /* Enable LSM order debugging. */
 static int __init enable_debug(char *str)
 {
-- 
2.17.1


  parent reply	other threads:[~2018-09-20 16:24 UTC|newest]

Thread overview: 45+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-09-20 16:23 [PATCH security-next v2 00/26] LSM: Explict LSM ordering Kees Cook
2018-09-20 16:23 ` [PATCH security-next v2 01/26] LSM: Correctly announce start of LSM initialization Kees Cook
2018-09-20 23:39   ` Casey Schaufler
2018-09-20 16:23 ` [PATCH security-next v2 02/26] vmlinux.lds.h: Avoid copy/paste of security_init section Kees Cook
2018-09-20 16:23 ` [PATCH security-next v2 03/26] LSM: Rename .security_initcall section to .lsm_info Kees Cook
2018-09-20 16:23 ` [PATCH security-next v2 04/26] LSM: Remove initcall tracing Kees Cook
2018-09-20 16:23 ` [PATCH security-next v2 05/26] LSM: Convert from initcall to struct lsm_info Kees Cook
2018-09-20 16:23 ` [PATCH security-next v2 06/26] vmlinux.lds.h: Move LSM_TABLE into INIT_DATA Kees Cook
2018-09-20 16:23 ` [PATCH security-next v2 07/26] LSM: Convert security_initcall() into DEFINE_LSM() Kees Cook
2018-09-20 16:23 ` [PATCH security-next v2 08/26] LSM: Record LSM name in struct lsm_info Kees Cook
2018-09-20 16:23 ` [PATCH security-next v2 09/26] LSM: Provide init debugging infrastructure Kees Cook
2018-09-20 16:23 ` [PATCH security-next v2 10/26] LSM: Don't ignore initialization failures Kees Cook
2018-09-20 16:23 ` [PATCH security-next v2 11/26] LSM: Introduce LSM_FLAG_LEGACY_MAJOR Kees Cook
2018-09-20 16:23 ` [PATCH security-next v2 12/26] LSM: Provide separate ordered initialization Kees Cook
2018-09-20 16:23 ` [PATCH security-next v2 13/26] LSM: Plumb visibility into optional "enabled" state Kees Cook
2018-09-20 16:23 ` [PATCH security-next v2 14/26] LSM: Lift LSM selection out of individual LSMs Kees Cook
2018-09-20 16:23 ` [PATCH security-next v2 15/26] LSM: Introduce lsm.enable= and lsm.disable= Kees Cook
2018-09-20 16:23 ` [PATCH security-next v2 16/26] LSM: Prepare for reorganizing "security=" logic Kees Cook
2018-09-20 16:23 ` [PATCH security-next v2 17/26] LSM: Refactor "security=" in terms of enable/disable Kees Cook
2018-09-20 16:23 ` [PATCH security-next v2 18/26] LSM: Build ordered list of ordered LSMs for init Kees Cook
2018-09-21  0:04   ` Casey Schaufler
2018-09-21  0:37     ` Kees Cook
2018-09-20 16:23 ` [PATCH security-next v2 19/26] LSM: Introduce CONFIG_LSM_ORDER Kees Cook
2018-09-21  0:10   ` Casey Schaufler
2018-09-21  0:14     ` Casey Schaufler
2018-09-20 16:23 ` Kees Cook [this message]
2018-09-21  0:12   ` [PATCH security-next v2 20/26] LSM: Introduce "lsm.order=" for boottime ordering Casey Schaufler
2018-09-21  0:40     ` Kees Cook
2018-09-20 16:23 ` [PATCH security-next v2 21/26] LoadPin: Initialize as ordered LSM Kees Cook
2018-09-20 16:23 ` [PATCH security-next v2 22/26] Yama: " Kees Cook
2018-09-20 16:23 ` [PATCH security-next v2 23/26] LSM: Introduce enum lsm_order Kees Cook
2018-09-20 16:23 ` [PATCH security-next v2 24/26] capability: Mark as LSM_ORDER_FIRST Kees Cook
2018-09-20 16:23 ` [PATCH security-next v2 25/26] LSM: Separate idea of "major" LSM from "exclusive" LSM Kees Cook
2018-09-20 16:23 ` [PATCH security-next v2 26/26] LSM: Add all exclusive LSMs to ordered initialization Kees Cook
2018-09-21  0:25   ` Casey Schaufler
2018-09-21  0:45     ` Kees Cook
2018-09-21  1:10       ` Casey Schaufler
2018-09-21  1:39         ` John Johansen
2018-09-21  2:05           ` Kees Cook
2018-09-21  2:14             ` John Johansen
2018-09-21  3:02               ` Kees Cook
2018-09-21 13:19                 ` John Johansen
2018-09-21 14:57                   ` Casey Schaufler
2018-09-20 20:14 ` [PATCH security-next v2 00/26] LSM: Explict LSM ordering Martin Steigerwald
2018-09-20 21:55   ` Kees Cook

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