1 files changed, 6 insertions, 3 deletions

diff --git a/security/keys/request_key.c b/security/keys/request_key.c
index 22a31582bfaa..03fe63ed55bd 100644
--- a/security/keys/request_key.c
+++ b/security/keys/request_key.c
@@ -311,7 +311,8 @@ static int construct_alloc_key(struct key_type *type,
 
         set_bit(KEY_FLAG_USER_CONSTRUCT, &key->flags);
 
-        down_write(&dest_keyring->sem);
+        if (dest_keyring)
+                down_write(&dest_keyring->sem);
 
         /* attach the key to the destination keyring under lock, but we do need
          * to do another check just in case someone beat us to it whilst we
@@ -322,10 +323,12 @@ static int construct_alloc_key(struct key_type *type,
         if (!IS_ERR(key_ref))
                 goto key_already_present;
 
-        __key_link(dest_keyring, key);
+        if (dest_keyring)
+                __key_link(dest_keyring, key);
 
         mutex_unlock(&key_construction_mutex);
-        up_write(&dest_keyring->sem);
+        if (dest_keyring)
+                up_write(&dest_keyring->sem);
         mutex_unlock(&user->cons_lock);
         *_key = key;
         kleave(" = 0 [%d]", key_serial(key));