[PATCH security-next v4 27/32] LoadPin: Initialize as ordered LSM

[Kees Cook]

This converts LoadPin from being a direct "minor" LSM into an ordered LSM.

Signed-off-by: Kees Cook <keesc...@chromium.org>
Reviewed-by: Casey Schaufler <ca...@schaufler-ca.com>
---
 include/linux/lsm_hooks.h  | 5 -----
 security/Kconfig           | 2 +-
 security/loadpin/loadpin.c | 8 +++++++-
 security/security.c        | 1 -
 4 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/include/linux/lsm_hooks.h b/include/linux/lsm_hooks.h
index b026ea93ff01..098ccf2caa0e 100644
--- a/include/linux/lsm_hooks.h
+++ b/include/linux/lsm_hooks.h
@@ -2091,10 +2091,5 @@ extern void __init yama_add_hooks(void);
 #else
 static inline void __init yama_add_hooks(void) { }
 #endif
-#ifdef CONFIG_SECURITY_LOADPIN
-void __init loadpin_add_hooks(void);
-#else
-static inline void loadpin_add_hooks(void) { };
-#endif
 
 #endif /* ! __LINUX_LSM_HOOKS_H */
diff --git a/security/Kconfig b/security/Kconfig
index c68520d97fd7..e59cb9296316 100644
--- a/security/Kconfig
+++ b/security/Kconfig
@@ -293,7 +293,7 @@ config LSM_ENABLE
 
 config LSM_ORDER
        string "Default initialization order of builtin LSMs"
-       default "integrity"
+       default "loadpin,integrity"
        help
          A comma-separated list of LSMs, in initialization order.
          Any LSMs left off this list will be link-order initialized
diff --git a/security/loadpin/loadpin.c b/security/loadpin/loadpin.c
index d8a68a6f6fef..dab42bfa1e4a 100644
--- a/security/loadpin/loadpin.c
+++ b/security/loadpin/loadpin.c
@@ -184,13 +184,19 @@ static struct security_hook_list loadpin_hooks[] 
__lsm_ro_after_init = {
        LSM_HOOK_INIT(kernel_load_data, loadpin_load_data),
 };
 
-void __init loadpin_add_hooks(void)
+static int __init loadpin_init(void)
 {
        pr_info("ready to pin (currently %senforcing)\n",
                enforcing ? "" : "not ");
        security_add_hooks(loadpin_hooks, ARRAY_SIZE(loadpin_hooks), "loadpin");
+       return 0;
 }
 
+DEFINE_LSM(loadpin) = {
+       .name = "loadpin",
+       .init = loadpin_init,
+};
+
 /* Should not be mutable after boot, so not listed in sysfs (perm == 0). */
 module_param(enforcing, int, 0);
 MODULE_PARM_DESC(enforcing, "Enforce module/firmware pinning");
diff --git a/security/security.c b/security/security.c
index 6fafad44b85e..6957f5f50483 100644
--- a/security/security.c
+++ b/security/security.c
@@ -297,7 +297,6 @@ int __init security_init(void)
         */
        capability_add_hooks();
        yama_add_hooks();
-       loadpin_add_hooks();
 
        /* Load LSMs in specified order. */
        prepare_lsm_order();
-- 
2.17.1