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Subject[PATCH security-next v5 27/30] LoadPin: Initialize as ordered LSM
Date
This converts LoadPin from being a direct "minor" LSM into an ordered LSM.

Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Casey Schaufler <casey@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 e88c725a43b8..e6893ff9ca2b 100644
--- a/include/linux/lsm_hooks.h
+++ b/include/linux/lsm_hooks.h
@@ -2092,10 +2092,5 @@ 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 2f8dc1f59cae..550bd7032ab2 100644
--- a/security/Kconfig
+++ b/security/Kconfig
@@ -241,7 +241,7 @@ source security/integrity/Kconfig

config LSM
string "Ordered list of enabled LSMs"
- default "integrity,selinux,smack,tomoyo,apparmor"
+ default "loadpin,integrity,selinux,smack,tomoyo,apparmor"
help
A comma-separated list of LSMs, in initialization order.
Any LSMs left off this list will be ignored. This can be
diff --git a/security/loadpin/loadpin.c b/security/loadpin/loadpin.c
index a2dc146b6364..640d9c69cf2e 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",
enforce ? "" : "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(enforce, int, 0);
MODULE_PARM_DESC(enforce, "Enforce module/firmware pinning");
diff --git a/security/security.c b/security/security.c
index b40c4c212892..6ad1262aa6ab 100644
--- a/security/security.c
+++ b/security/security.c
@@ -265,7 +265,6 @@ int __init security_init(void)
*/
capability_add_hooks();
yama_add_hooks();
- loadpin_add_hooks();

/* Load LSMs in specified order. */
ordered_lsm_init();
--
2.17.1
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