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 v3 18/29] LSM: Introduce lsm.enable= and lsm.disable= Date: Mon, 24 Sep 2018 17:18:21 -0700 [thread overview] Message-ID: <20180925001832.18322-19-keescook@chromium.org> (raw) In-Reply-To: <20180925001832.18322-1-keescook@chromium.org> This introduces the "lsm.enable=..." and "lsm.disable=..." boot parameters which each can contain a comma-separated list of LSMs to enable or disable, respectively. The string "all" matches all LSMs. This has very similar functionality to the existing per-LSM enable handling ("apparmor.enabled=...", etc), but provides a centralized place to perform the changes. These parameters take precedent over any LSM-specific boot parameters. Disabling an LSM means it will not be considered when performing initializations. Enabling an LSM means either undoing a previous LSM-specific boot parameter disabling or a undoing a default-disabled CONFIG setting. For example: "lsm.disable=apparmor apparmor.enabled=1" will result in AppArmor being disabled. "selinux.enabled=0 lsm.enable=selinux" will result in SELinux being enabled. Signed-off-by: Kees Cook <keescook@chromium.org> --- .../admin-guide/kernel-parameters.txt | 12 ++++++++++ security/Kconfig | 4 +++- security/security.c | 22 +++++++++++++++++++ 3 files changed, 37 insertions(+), 1 deletion(-) diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 32d323ee9218..67c90985d2b8 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -2276,6 +2276,18 @@ lsm.debug [SECURITY] Enable LSM initialization debugging output. + lsm.disable=lsm1,...,lsmN + [SECURITY] Comma-separated list of LSMs to disable + at boot time. This overrides "lsm.enable=", + CONFIG_LSM_ENABLE, and any per-LSM CONFIGs and boot + parameters. + + lsm.enable=lsm1,...,lsmN + [SECURITY] Comma-separated list of LSMs to enable + at boot time. This overrides any omissions from + CONFIG_LSM_ENABLE, and any per-LSM CONFIGs and + boot parameters. + machvec= [IA-64] Force the use of a particular machine-vector (machvec) in a generic kernel. Example: machvec=hpzx1_swiotlb diff --git a/security/Kconfig b/security/Kconfig index 71306b046270..1a82a006cc62 100644 --- a/security/Kconfig +++ b/security/Kconfig @@ -282,7 +282,9 @@ config LSM_ENABLE help A comma-separate list of LSMs to enable by default at boot. The default is "all", to enable all LSM modules at boot. Any LSMs - not listed here will be disabled by default. + not listed here will be disabled by default. This can be + changed with the "lsm.enable=" and "lsm.disable=" boot + parameters. endmenu diff --git a/security/security.c b/security/security.c index 7ecb9879a863..456a3f73bc36 100644 --- a/security/security.c +++ b/security/security.c @@ -44,6 +44,8 @@ char *lsm_names; /* Boot-time LSM user choice */ static __initdata char chosen_lsm[SECURITY_NAME_MAX + 1] = CONFIG_DEFAULT_SECURITY; +static __initdata const char *chosen_lsm_enable; +static __initdata const char *chosen_lsm_disable; static __initconst const char * const builtin_lsm_enable = CONFIG_LSM_ENABLE; @@ -185,6 +187,10 @@ static void __init prepare_lsm_enable(void) { /* Prepare defaults. */ parse_lsm_enable(builtin_lsm_enable, default_enabled, true); + + /* Process "lsm.enable=" and "lsm.disable=", if given. */ + parse_lsm_enable(chosen_lsm_enable, set_enabled, true); + parse_lsm_enable(chosen_lsm_disable, set_enabled, false); } /** @@ -240,6 +246,22 @@ static int __init enable_debug(char *str) } __setup("lsm.debug", enable_debug); +/* Explicitly enable a list of LSMs. */ +static int __init enable_lsm(char *str) +{ + chosen_lsm_enable = str; + return 1; +} +__setup("lsm.enable=", enable_lsm); + +/* Explicitly disable a list of LSMs. */ +static int __init disable_lsm(char *str) +{ + chosen_lsm_disable = str; + return 1; +} +__setup("lsm.disable=", disable_lsm); + static bool match_last_lsm(const char *list, const char *lsm) { const char *last; -- 2.17.1
WARNING: multiple messages have this Message-ID (diff)
From: keescook@chromium.org (Kees Cook) To: linux-security-module@vger.kernel.org Subject: [PATCH security-next v3 18/29] LSM: Introduce lsm.enable= and lsm.disable= Date: Mon, 24 Sep 2018 17:18:21 -0700 [thread overview] Message-ID: <20180925001832.18322-19-keescook@chromium.org> (raw) In-Reply-To: <20180925001832.18322-1-keescook@chromium.org> This introduces the "lsm.enable=..." and "lsm.disable=..." boot parameters which each can contain a comma-separated list of LSMs to enable or disable, respectively. The string "all" matches all LSMs. This has very similar functionality to the existing per-LSM enable handling ("apparmor.enabled=...", etc), but provides a centralized place to perform the changes. These parameters take precedent over any LSM-specific boot parameters. Disabling an LSM means it will not be considered when performing initializations. Enabling an LSM means either undoing a previous LSM-specific boot parameter disabling or a undoing a default-disabled CONFIG setting. For example: "lsm.disable=apparmor apparmor.enabled=1" will result in AppArmor being disabled. "selinux.enabled=0 lsm.enable=selinux" will result in SELinux being enabled. Signed-off-by: Kees Cook <keescook@chromium.org> --- .../admin-guide/kernel-parameters.txt | 12 ++++++++++ security/Kconfig | 4 +++- security/security.c | 22 +++++++++++++++++++ 3 files changed, 37 insertions(+), 1 deletion(-) diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 32d323ee9218..67c90985d2b8 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -2276,6 +2276,18 @@ lsm.debug [SECURITY] Enable LSM initialization debugging output. + lsm.disable=lsm1,...,lsmN + [SECURITY] Comma-separated list of LSMs to disable + at boot time. This overrides "lsm.enable=", + CONFIG_LSM_ENABLE, and any per-LSM CONFIGs and boot + parameters. + + lsm.enable=lsm1,...,lsmN + [SECURITY] Comma-separated list of LSMs to enable + at boot time. This overrides any omissions from + CONFIG_LSM_ENABLE, and any per-LSM CONFIGs and + boot parameters. + machvec= [IA-64] Force the use of a particular machine-vector (machvec) in a generic kernel. Example: machvec=hpzx1_swiotlb diff --git a/security/Kconfig b/security/Kconfig index 71306b046270..1a82a006cc62 100644 --- a/security/Kconfig +++ b/security/Kconfig @@ -282,7 +282,9 @@ config LSM_ENABLE help A comma-separate list of LSMs to enable by default at boot. The default is "all", to enable all LSM modules at boot. Any LSMs - not listed here will be disabled by default. + not listed here will be disabled by default. This can be + changed with the "lsm.enable=" and "lsm.disable=" boot + parameters. endmenu diff --git a/security/security.c b/security/security.c index 7ecb9879a863..456a3f73bc36 100644 --- a/security/security.c +++ b/security/security.c @@ -44,6 +44,8 @@ char *lsm_names; /* Boot-time LSM user choice */ static __initdata char chosen_lsm[SECURITY_NAME_MAX + 1] = CONFIG_DEFAULT_SECURITY; +static __initdata const char *chosen_lsm_enable; +static __initdata const char *chosen_lsm_disable; static __initconst const char * const builtin_lsm_enable = CONFIG_LSM_ENABLE; @@ -185,6 +187,10 @@ static void __init prepare_lsm_enable(void) { /* Prepare defaults. */ parse_lsm_enable(builtin_lsm_enable, default_enabled, true); + + /* Process "lsm.enable=" and "lsm.disable=", if given. */ + parse_lsm_enable(chosen_lsm_enable, set_enabled, true); + parse_lsm_enable(chosen_lsm_disable, set_enabled, false); } /** @@ -240,6 +246,22 @@ static int __init enable_debug(char *str) } __setup("lsm.debug", enable_debug); +/* Explicitly enable a list of LSMs. */ +static int __init enable_lsm(char *str) +{ + chosen_lsm_enable = str; + return 1; +} +__setup("lsm.enable=", enable_lsm); + +/* Explicitly disable a list of LSMs. */ +static int __init disable_lsm(char *str) +{ + chosen_lsm_disable = str; + return 1; +} +__setup("lsm.disable=", disable_lsm); + static bool match_last_lsm(const char *list, const char *lsm) { const char *last; -- 2.17.1
next prev parent reply other threads:[~2018-09-25 0:25 UTC|newest] Thread overview: 126+ messages / expand[flat|nested] mbox.gz Atom feed top 2018-09-25 0:18 [PATCH security-next v3 00/29] LSM: Explict LSM ordering Kees Cook 2018-09-25 0:18 ` Kees Cook 2018-09-25 0:18 ` [PATCH security-next v3 01/29] LSM: Correctly announce start of LSM initialization Kees Cook 2018-09-25 0:18 ` Kees Cook 2018-10-01 19:53 ` James Morris 2018-10-01 21:05 ` John Johansen 2018-09-25 0:18 ` [PATCH security-next v3 02/29] vmlinux.lds.h: Avoid copy/paste of security_init section Kees Cook 2018-09-25 0:18 ` Kees Cook 2018-10-01 19:56 ` James Morris 2018-10-01 21:05 ` John Johansen 2018-09-25 0:18 ` [PATCH security-next v3 03/29] LSM: Rename .security_initcall section to .lsm_info Kees Cook 2018-09-25 0:18 ` Kees Cook 2018-10-01 19:57 ` James Morris 2018-10-01 21:06 ` John Johansen 2018-09-25 0:18 ` [PATCH security-next v3 04/29] LSM: Remove initcall tracing Kees Cook 2018-09-25 0:18 ` Kees Cook 2018-09-26 16:35 ` Steven Rostedt 2018-09-26 16:35 ` Steven Rostedt 2018-09-26 18:35 ` Kees Cook 2018-09-26 18:35 ` Kees Cook 2018-09-30 23:25 ` Steven Rostedt 2018-09-30 23:25 ` Steven Rostedt 2018-10-01 1:01 ` Kees Cook 2018-10-01 1:01 ` Kees Cook 2018-10-01 21:07 ` John Johansen 2018-10-01 21:23 ` Steven Rostedt 2018-10-01 22:38 ` Kees Cook 2018-09-25 0:18 ` [PATCH security-next v3 05/29] LSM: Convert from initcall to struct lsm_info Kees Cook 2018-09-25 0:18 ` Kees Cook 2018-10-01 19:59 ` James Morris 2018-10-01 21:08 ` John Johansen 2018-09-25 0:18 ` [PATCH security-next v3 06/29] vmlinux.lds.h: Move LSM_TABLE into INIT_DATA Kees Cook 2018-09-25 0:18 ` Kees Cook 2018-10-01 21:10 ` John Johansen 2018-09-25 0:18 ` [PATCH security-next v3 07/29] LSM: Convert security_initcall() into DEFINE_LSM() Kees Cook 2018-09-25 0:18 ` Kees Cook 2018-10-01 21:12 ` John Johansen 2018-09-25 0:18 ` [PATCH security-next v3 08/29] LSM: Record LSM name in struct lsm_info Kees Cook 2018-09-25 0:18 ` Kees Cook 2018-10-01 21:13 ` John Johansen 2018-09-25 0:18 ` [PATCH security-next v3 09/29] LSM: Provide init debugging infrastructure Kees Cook 2018-09-25 0:18 ` Kees Cook 2018-10-01 21:14 ` John Johansen 2018-09-25 0:18 ` [PATCH security-next v3 10/29] LSM: Don't ignore initialization failures Kees Cook 2018-09-25 0:18 ` Kees Cook 2018-10-01 21:14 ` John Johansen 2018-09-25 0:18 ` [PATCH security-next v3 11/29] LSM: Introduce LSM_FLAG_LEGACY_MAJOR Kees Cook 2018-09-25 0:18 ` Kees Cook 2018-10-01 21:15 ` John Johansen 2018-09-25 0:18 ` [PATCH security-next v3 12/29] LSM: Provide separate ordered initialization Kees Cook 2018-09-25 0:18 ` Kees Cook 2018-10-01 21:17 ` John Johansen 2018-10-01 22:03 ` Kees Cook 2018-09-25 0:18 ` [PATCH security-next v3 13/29] LoadPin: Rename "enable" to "enforce" Kees Cook 2018-09-25 0:18 ` Kees Cook 2018-10-01 21:17 ` John Johansen 2018-09-25 0:18 ` [PATCH security-next v3 14/29] LSM: Plumb visibility into optional "enabled" state Kees Cook 2018-09-25 0:18 ` Kees Cook 2018-10-01 21:18 ` John Johansen 2018-10-01 21:47 ` James Morris 2018-10-01 21:56 ` Kees Cook 2018-10-01 22:20 ` John Johansen 2018-10-01 22:29 ` Kees Cook 2018-10-01 22:53 ` John Johansen 2018-09-25 0:18 ` [PATCH security-next v3 15/29] LSM: Lift LSM selection out of individual LSMs Kees Cook 2018-09-25 0:18 ` Kees Cook 2018-10-01 21:18 ` John Johansen 2018-09-25 0:18 ` [PATCH security-next v3 16/29] LSM: Prepare for arbitrary LSM enabling Kees Cook 2018-09-25 0:18 ` Kees Cook 2018-10-01 21:22 ` John Johansen 2018-09-25 0:18 ` [PATCH security-next v3 17/29] LSM: Introduce CONFIG_LSM_ENABLE Kees Cook 2018-09-25 0:18 ` Kees Cook 2018-10-01 21:34 ` John Johansen 2018-09-25 0:18 ` Kees Cook [this message] 2018-09-25 0:18 ` [PATCH security-next v3 18/29] LSM: Introduce lsm.enable= and lsm.disable= Kees Cook 2018-10-01 21:46 ` John Johansen 2018-10-01 22:27 ` Kees Cook 2018-10-01 22:48 ` John Johansen 2018-10-01 23:30 ` Kees Cook 2018-10-01 23:38 ` Kees Cook 2018-10-01 23:57 ` John Johansen 2018-10-01 23:44 ` John Johansen 2018-10-01 23:49 ` Kees Cook 2018-09-25 0:18 ` [PATCH security-next v3 19/29] LSM: Prepare for reorganizing "security=" logic Kees Cook 2018-09-25 0:18 ` Kees Cook 2018-10-01 21:47 ` John Johansen 2018-09-25 0:18 ` [PATCH security-next v3 20/29] LSM: Refactor "security=" in terms of enable/disable Kees Cook 2018-09-25 0:18 ` Kees Cook 2018-09-25 0:18 ` [PATCH security-next v3 21/29] LSM: Build ordered list of ordered LSMs for init Kees Cook 2018-09-25 0:18 ` Kees Cook 2018-09-25 0:18 ` [PATCH security-next v3 22/29] LSM: Introduce CONFIG_LSM_ORDER Kees Cook 2018-09-25 0:18 ` Kees Cook 2018-09-25 0:18 ` [PATCH security-next v3 23/29] LSM: Introduce "lsm.order=" for boottime ordering Kees Cook 2018-09-25 0:18 ` Kees Cook 2018-09-25 0:18 ` [PATCH security-next v3 24/29] LoadPin: Initialize as ordered LSM Kees Cook 2018-09-25 0:18 ` Kees Cook 2018-09-25 0:18 ` [PATCH security-next v3 25/29] Yama: " Kees Cook 2018-09-25 0:18 ` Kees Cook 2018-09-25 0:18 ` [PATCH security-next v3 26/29] LSM: Introduce enum lsm_order Kees Cook 2018-09-25 0:18 ` Kees Cook 2018-09-25 0:18 ` [PATCH security-next v3 27/29] capability: Initialize as LSM_ORDER_FIRST Kees Cook 2018-09-25 0:18 ` Kees Cook 2018-09-25 0:18 ` [PATCH security-next v3 28/29] LSM: Separate idea of "major" LSM from "exclusive" LSM Kees Cook 2018-09-25 0:18 ` Kees Cook 2018-09-25 0:18 ` [PATCH security-next v3 29/29] LSM: Add all exclusive LSMs to ordered initialization Kees Cook 2018-09-25 0:18 ` Kees Cook 2018-09-28 15:55 ` [PATCH security-next v3 00/29] LSM: Explict LSM ordering Casey Schaufler 2018-09-28 15:55 ` Casey Schaufler 2018-09-28 20:01 ` Kees Cook 2018-09-28 20:01 ` Kees Cook 2018-09-28 20:25 ` Stephen Smalley 2018-09-28 20:25 ` Stephen Smalley 2018-09-28 20:33 ` Stephen Smalley 2018-09-28 20:33 ` Stephen Smalley 2018-09-28 20:54 ` Kees Cook 2018-09-28 20:54 ` Kees Cook 2018-09-29 10:48 ` Tetsuo Handa 2018-09-29 10:48 ` Tetsuo Handa 2018-09-29 18:18 ` Kees Cook 2018-09-29 18:18 ` Kees Cook 2018-09-30 2:36 ` Tetsuo Handa 2018-09-30 2:36 ` Tetsuo Handa 2018-09-30 16:57 ` Kees Cook 2018-09-30 16:57 ` Kees Cook 2018-09-29 18:19 ` John Johansen 2018-09-29 18:19 ` John Johansen
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