LSM: Lift LSM selection out of individual LSMs

As a prerequisite to adjusting LSM selection logic in the future, this
moves the selection logic up out of the individual major LSMs, making
their init functions only run when actually enabled. This considers all
LSMs enabled by default unless they specified an external "enable"
variable.

Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Casey Schaufler <casey@schaufler-ca.com>
Reviewed-by: John Johansen <john.johansen@canonical.com>

1 files changed, 0 insertions, 10 deletions

diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index f847514d6f03..0f8ae2fbd14a 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -6928,16 +6928,6 @@ static struct security_hook_list selinux_hooks[] __lsm_ro_after_init = {
 
 static __init int selinux_init(void)
 {
-        if (!security_module_enable("selinux")) {
-                selinux_enabled = 0;
-                return 0;
-        }
-
-        if (!selinux_enabled) {
-                pr_info("SELinux:  Disabled at boot.\n");
-                return 0;
-        }
-
         pr_info("SELinux:  Initializing.\n");
 
         memset(&selinux_state, 0, sizeof(selinux_state));