CRED: Wrap current->cred and a few other accessors

Wrap current->cred and a few other accessors to hide their actual
implementation.

Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: James Morris <jmorris@namei.org>
Acked-by: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: James Morris <jmorris@namei.org>

2 files changed, 7 insertions, 6 deletions

diff --git a/security/keys/process_keys.c b/security/keys/process_keys.c
index b0904cdda2e7..ce8ac6073d57 100644
--- a/security/keys/process_keys.c
+++ b/security/keys/process_keys.c
@@ -582,7 +582,7 @@ key_ref_t lookup_user_key(key_serial_t id, int create, int partial,
 {
         struct request_key_auth *rka;
         struct task_struct *t = current;
-        struct cred *cred = t->cred;
+        struct cred *cred = current_cred();
         struct key *key;
         key_ref_t key_ref, skey_ref;
         int ret;
diff --git a/security/keys/request_key.c b/security/keys/request_key.c
index 3e9b9eb1dd28..0488b0af5bd6 100644
--- a/security/keys/request_key.c
+++ b/security/keys/request_key.c
@@ -67,6 +67,7 @@ static int call_sbin_request_key(struct key_construction *cons,
                                  void *aux)
 {
         struct task_struct *tsk = current;
+        const struct cred *cred = current_cred();
         key_serial_t prkey, sskey;
         struct key *key = cons->key, *authkey = cons->authkey, *keyring;
         char *argv[9], *envp[3], uid_str[12], gid_str[12];
@@ -96,16 +97,16 @@ static int call_sbin_request_key(struct key_construction *cons,
                 goto error_link;
 
         /* record the UID and GID */
-        sprintf(uid_str, "%d", current_fsuid());
-        sprintf(gid_str, "%d", current_fsgid());
+        sprintf(uid_str, "%d", cred->fsuid);
+        sprintf(gid_str, "%d", cred->fsgid);
 
         /* we say which key is under construction */
         sprintf(key_str, "%d", key->serial);
 
         /* we specify the process's default keyrings */
         sprintf(keyring_str[0], "%d",
-                tsk->cred->thread_keyring ?
-                tsk->cred->thread_keyring->serial : 0);
+                cred->thread_keyring ?
+                cred->thread_keyring->serial : 0);
 
         prkey = 0;
         if (tsk->signal->process_keyring)
@@ -118,7 +119,7 @@ static int call_sbin_request_key(struct key_construction *cons,
                 sskey = rcu_dereference(tsk->signal->session_keyring)->serial;
                 rcu_read_unlock();
         } else {
-                sskey = tsk->cred->user->session_keyring->serial;
+                sskey = cred->user->session_keyring->serial;
         }
 
         sprintf(keyring_str[2], "%d", sskey);