Yama: remove needless CONFIG_SECURITY_YAMA_STACKED

Now that minor LSMs can cleanly stack with major LSMs, remove the unneeded
config for Yama to be made to explicitly stack. Just selecting the main
Yama CONFIG will allow it to work, regardless of the major LSM. Since
distros using Yama are already forcing it to stack, this is effectively
a no-op change.

Additionally add MAINTAINERS entry.

Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: James Morris <james.l.morris@oracle.com>

1 files changed, 10 insertions, 22 deletions

diff --git a/security/yama/yama_lsm.c b/security/yama/yama_lsm.c
index 9ed32502470e..d3c19c970a06 100644
--- a/security/yama/yama_lsm.c
+++ b/security/yama/yama_lsm.c
@@ -353,11 +353,6 @@ static struct security_hook_list yama_hooks[] = {
 	LSM_HOOK_INIT(task_free, yama_task_free),
 };
 
-void __init yama_add_hooks(void)
-{
-	security_add_hooks(yama_hooks, ARRAY_SIZE(yama_hooks));
-}
-
 #ifdef CONFIG_SYSCTL
 static int yama_dointvec_minmax(struct ctl_table *table, int write,
 				void __user *buffer, size_t *lenp, loff_t *ppos)
@@ -396,25 +391,18 @@ static struct ctl_table yama_sysctl_table[] = {
 	},
 	{ }
 };
-#endif /* CONFIG_SYSCTL */
-
-static __init int yama_init(void)
+static void __init yama_init_sysctl(void)
 {
-#ifndef CONFIG_SECURITY_YAMA_STACKED
-	/*
-	 * If yama is being stacked this is already taken care of.
-	 */
-	if (!security_module_enable("yama"))
-		return 0;
-#endif
-	pr_info("Yama: becoming mindful.\n");
-
-#ifdef CONFIG_SYSCTL
 	if (!register_sysctl_paths(yama_sysctl_path, yama_sysctl_table))
 		panic("Yama: sysctl registration failed.\n");
-#endif
-
-	return 0;
 }
+#else
+static inline void yama_init_sysctl(void) { }
+#endif /* CONFIG_SYSCTL */
 
-security_initcall(yama_init);
+void __init yama_add_hooks(void)
+{
+	pr_info("Yama: becoming mindful.\n");
+	security_add_hooks(yama_hooks, ARRAY_SIZE(yama_hooks));
+	yama_init_sysctl();
+}