3 files changed, 18 insertions, 2 deletions

diff --git a/security/smack/smack.h b/security/smack/smack.h
index 62c1e982849d..4a4477f5afdc 100644
--- a/security/smack/smack.h
+++ b/security/smack/smack.h
@@ -15,6 +15,7 @@
 
 #include <linux/capability.h>
 #include <linux/spinlock.h>
+#include <linux/security.h>
 #include <net/netlabel.h>
 
 /*
@@ -187,6 +188,7 @@ extern struct smack_known smack_known_star;
 extern struct smack_known smack_known_unset;
 
 extern struct smk_list_entry *smack_list;
+extern struct security_operations smack_ops;
 
 /*
  * Stricly for CIPSO level manipulation.
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index 732ba27923c4..904bdc01a12b 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -2424,7 +2424,9 @@ static void smack_release_secctx(char *secdata, u32 seclen)
 {
 }
 
-static struct security_operations smack_ops = {
+struct security_operations smack_ops = {
+        .name =                         "smack",
+
         .ptrace =                       smack_ptrace,
         .capget =                       cap_capget,
         .capset_check =                 cap_capset_check,
@@ -2557,6 +2559,9 @@ static struct security_operations smack_ops = {
  */
 static __init int smack_init(void)
 {
+        if (!security_module_enable(&smack_ops))
+                return 0;
+
         printk(KERN_INFO "Smack:  Initializing.\n");
 
         /*
diff --git a/security/smack/smackfs.c b/security/smack/smackfs.c
index cfae8afcc262..6ba283783b70 100644
--- a/security/smack/smackfs.c
+++ b/security/smack/smackfs.c
@@ -965,12 +965,21 @@ static struct vfsmount *smackfs_mount;
  *
  * register the smackfs
  *
- * Returns 0 unless the registration fails.
+ * Do not register smackfs if Smack wasn't enabled
+ * on boot. We can not put this method normally under the
+ * smack_init() code path since the security subsystem get
+ * initialized before the vfs caches.
+ *
+ * Returns true if we were not chosen on boot or if
+ * we were chosen and filesystem registration succeeded.
  */
 static int __init init_smk_fs(void)
 {
         int err;
 
+        if (!security_module_enable(&smack_ops))
+                return 0;
+
         err = register_filesystem(&smk_fs_type);
         if (!err) {
                 smackfs_mount = kern_mount(&smk_fs_type);