From: John Johansen <john.johansen@canonical.com>
To: Kees Cook <keescook@chromium.org>, James Morris <jmorris@namei.org>
Cc: "Serge E. Hallyn" <serge@hallyn.com>,
Ard Biesheuvel <ard.biesheuvel@linaro.org>,
Paul Moore <paul@paul-moore.com>,
linux-security-module@vger.kernel.org,
Casey Schaufler <casey@schaufler-ca.com>,
Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>,
Stephen Smalley <sds@tycho.nsa.gov>,
"Schaufler, Casey" <casey.schaufler@intel.com>,
Jonathan Corbet <corbet@lwn.net>,
linux-doc@vger.kernel.org, linux-arch@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH security-next v3 05/29] LSM: Convert from initcall to struct lsm_info
Date: Mon, 1 Oct 2018 14:08:28 -0700 [thread overview]
Message-ID: <7aff4c37-6e43-1417-bb11-b819e1d583a6@canonical.com> (raw)
In-Reply-To: <20180925001832.18322-6-keescook@chromium.org>
On 09/24/2018 05:18 PM, Kees Cook wrote:
> In preparation for doing more interesting LSM init probing, this converts
> the existing initcall system into an explicit call into a function pointer
> from a section-collected struct lsm_info array.
>
> Cc: James Morris <jmorris@namei.org>
> Cc: "Serge E. Hallyn" <serge@hallyn.com>
> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
> Cc: Paul Moore <paul@paul-moore.com>
> Cc: linux-security-module@vger.kernel.org
> Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: John Johansen <john.johansen@canonical.com>
> ---
> include/linux/init.h | 2 --
> include/linux/lsm_hooks.h | 12 ++++++++++++
> include/linux/module.h | 1 -
> security/integrity/iint.c | 1 +
> security/security.c | 14 +++++---------
> 5 files changed, 18 insertions(+), 12 deletions(-)
>
> diff --git a/include/linux/init.h b/include/linux/init.h
> index 77636539e77c..9c2aba1dbabf 100644
> --- a/include/linux/init.h
> +++ b/include/linux/init.h
> @@ -133,7 +133,6 @@ static inline initcall_t initcall_from_entry(initcall_entry_t *entry)
> #endif
>
> extern initcall_entry_t __con_initcall_start[], __con_initcall_end[];
> -extern initcall_entry_t __start_lsm_info[], __end_lsm_info[];
>
> /* Used for contructor calls. */
> typedef void (*ctor_fn_t)(void);
> @@ -236,7 +235,6 @@ extern bool initcall_debug;
> static exitcall_t __exitcall_##fn __exit_call = fn
>
> #define console_initcall(fn) ___define_initcall(fn,, .con_initcall)
> -#define security_initcall(fn) ___define_initcall(fn,, .lsm_info)
>
> struct obs_kernel_param {
> const char *str;
> diff --git a/include/linux/lsm_hooks.h b/include/linux/lsm_hooks.h
> index 97a020c616ad..ad04761e5587 100644
> --- a/include/linux/lsm_hooks.h
> +++ b/include/linux/lsm_hooks.h
> @@ -2039,6 +2039,18 @@ extern char *lsm_names;
> extern void security_add_hooks(struct security_hook_list *hooks, int count,
> char *lsm);
>
> +struct lsm_info {
> + int (*init)(void);
> +};
> +
> +extern struct lsm_info __start_lsm_info[], __end_lsm_info[];
> +
> +#define security_initcall(lsm) \
> + static struct lsm_info __lsm_##lsm \
> + __used __section(.lsm_info.init) \
> + __aligned(sizeof(unsigned long)) \
> + = { .init = lsm, }
> +
> #ifdef CONFIG_SECURITY_SELINUX_DISABLE
> /*
> * Assuring the safety of deleting a security module is up to
> diff --git a/include/linux/module.h b/include/linux/module.h
> index f807f15bebbe..264979283756 100644
> --- a/include/linux/module.h
> +++ b/include/linux/module.h
> @@ -123,7 +123,6 @@ extern void cleanup_module(void);
> #define late_initcall_sync(fn) module_init(fn)
>
> #define console_initcall(fn) module_init(fn)
> -#define security_initcall(fn) module_init(fn)
>
> /* Each module must use one module_init(). */
> #define module_init(initfn) \
> diff --git a/security/integrity/iint.c b/security/integrity/iint.c
> index 5a6810041e5c..70d21b566955 100644
> --- a/security/integrity/iint.c
> +++ b/security/integrity/iint.c
> @@ -22,6 +22,7 @@
> #include <linux/file.h>
> #include <linux/uaccess.h>
> #include <linux/security.h>
> +#include <linux/lsm_hooks.h>
> #include "integrity.h"
>
> static struct rb_root integrity_iint_tree = RB_ROOT;
> diff --git a/security/security.c b/security/security.c
> index 41a5da2c7faf..e74f46fba591 100644
> --- a/security/security.c
> +++ b/security/security.c
> @@ -43,16 +43,12 @@ char *lsm_names;
> static __initdata char chosen_lsm[SECURITY_NAME_MAX + 1] =
> CONFIG_DEFAULT_SECURITY;
>
> -static void __init do_security_initcalls(void)
> +static void __init major_lsm_init(void)
> {
> - initcall_t call;
> - initcall_entry_t *ce;
> + struct lsm_info *lsm;
>
> - ce = __start_lsm_info;
> - while (ce < __end_lsm_info) {
> - call = initcall_from_entry(ce);
> - call();
> - ce++;
> + for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) {
> + lsm->init();
> }
> }
>
> @@ -82,7 +78,7 @@ int __init security_init(void)
> /*
> * Load all the remaining security modules.
> */
> - do_security_initcalls();
> + major_lsm_init();
>
> return 0;
> }
>
next prev parent reply other threads:[~2018-10-01 21:08 UTC|newest]
Thread overview: 82+ 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 ` [PATCH security-next v3 01/29] LSM: Correctly announce start of LSM initialization 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
2018-10-01 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
2018-10-01 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
2018-09-26 16:35 ` Steven Rostedt
2018-09-26 18:35 ` Kees Cook
2018-09-30 23:25 ` Steven Rostedt
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
2018-10-01 19:59 ` James Morris
2018-10-01 21:08 ` John Johansen [this message]
2018-09-25 0:18 ` [PATCH security-next v3 06/29] vmlinux.lds.h: Move LSM_TABLE into INIT_DATA 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
2018-10-01 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
2018-10-01 21:13 ` John Johansen
2018-09-25 0:18 ` [PATCH security-next v3 09/29] LSM: Provide init debugging infrastructure Kees Cook
2018-10-01 21:14 ` John Johansen
2018-09-25 0:18 ` [PATCH security-next v3 10/29] LSM: Don't ignore initialization failures Kees Cook
2018-10-01 21:14 ` John Johansen
2018-09-25 0:18 ` [PATCH security-next v3 11/29] LSM: Introduce LSM_FLAG_LEGACY_MAJOR Kees Cook
2018-10-01 21:15 ` John Johansen
2018-09-25 0:18 ` [PATCH security-next v3 12/29] LSM: Provide separate ordered initialization Kees Cook
2018-10-01 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
2018-10-01 21:17 ` John Johansen
2018-09-25 0:18 ` [PATCH security-next v3 14/29] LSM: Plumb visibility into optional "enabled" state Kees Cook
2018-10-01 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
2018-10-01 21:18 ` John Johansen
2018-09-25 0:18 ` [PATCH security-next v3 16/29] LSM: Prepare for arbitrary LSM enabling Kees Cook
2018-10-01 21:22 ` John Johansen
2018-09-25 0:18 ` [PATCH security-next v3 17/29] LSM: Introduce CONFIG_LSM_ENABLE Kees Cook
2018-10-01 21:34 ` John Johansen
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
2018-10-01 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 ` [PATCH security-next v3 21/29] LSM: Build ordered list of ordered LSMs for init 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 ` [PATCH security-next v3 23/29] LSM: Introduce "lsm.order=" for boottime ordering 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 ` [PATCH security-next v3 25/29] Yama: " 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 ` [PATCH security-next v3 27/29] capability: Initialize as LSM_ORDER_FIRST 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 ` [PATCH security-next v3 29/29] LSM: Add all exclusive LSMs to ordered initialization Kees Cook
2018-09-28 15:55 ` [PATCH security-next v3 00/29] LSM: Explict LSM ordering Casey Schaufler
2018-09-28 20:01 ` Kees Cook
2018-09-28 20:25 ` Stephen Smalley
2018-09-28 20:33 ` Stephen Smalley
2018-09-28 20:54 ` Kees Cook
2018-09-29 10:48 ` Tetsuo Handa
2018-09-29 18:18 ` Kees Cook
2018-09-30 2:36 ` Tetsuo Handa
2018-09-30 16:57 ` Kees Cook
2018-09-29 18:19 ` John Johansen
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