security: remove dead hook key_session_to_parent

Unused hook.  Remove.

Signed-off-by: Eric Paris <eparis@redhat.com>
Signed-off-by: James Morris <jmorris@namei.org>

diff --git a/include/linux/security.h b/include/linux/security.h
index 73505f0..ac536ee 100644 (file)
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -1067,13 +1067,6 @@ static inline void security_free_mnt_opts(struct security_mnt_opts *opts)
  *     Return the length of the string (including terminating NUL) or -ve if
  *      an error.
  *     May also return 0 (and a NULL buffer pointer) if there is no label.
- * @key_session_to_parent:
- *     Forcibly assign the session keyring from a process to its parent
- *     process.
- *     @cred: Pointer to process's credentials
- *     @parent_cred: Pointer to parent process's credentials
- *     @keyring: Proposed new session keyring
- *     Return 0 if permission is granted, -ve error otherwise.
  *
  * Security hooks affecting all System V IPC operations.
  *
@@ -1642,9 +1635,6 @@ struct security_operations {
                               const struct cred *cred,
                               key_perm_t perm);
        int (*key_getsecurity)(struct key *key, char **_buffer);
-       int (*key_session_to_parent)(const struct cred *cred,
-                                    const struct cred *parent_cred,
-                                    struct key *key);
 #endif /* CONFIG_KEYS */
 
 #ifdef CONFIG_AUDIT
@@ -2918,9 +2908,6 @@ void security_key_free(struct key *key);
 int security_key_permission(key_ref_t key_ref,
                            const struct cred *cred, key_perm_t perm);
 int security_key_getsecurity(struct key *key, char **_buffer);
-int security_key_session_to_parent(const struct cred *cred,
-                                  const struct cred *parent_cred,
-                                  struct key *key);
 
 #else
 
@@ -2948,13 +2935,6 @@ static inline int security_key_getsecurity(struct key *key, char **_buffer)
        return 0;
 }
 
-static inline int security_key_session_to_parent(const struct cred *cred,
-                                                const struct cred *parent_cred,
-                                                struct key *key)
-{
-       return 0;
-}
-
 #endif
 #endif /* CONFIG_KEYS */
 

diff --git a/security/capability.c b/security/capability.c
index 247c04e..8cc2b8f 100644 (file)
--- a/security/capability.c
+++ b/security/capability.c
@@ -826,13 +826,6 @@ static int cap_key_getsecurity(struct key *key, char **_buffer)
        return 0;
 }
 
-static int cap_key_session_to_parent(const struct cred *cred,
-                                    const struct cred *parent_cred,
-                                    struct key *key)
-{
-       return 0;
-}
-
 #endif /* CONFIG_KEYS */
 
 #ifdef CONFIG_AUDIT
@@ -1053,7 +1046,6 @@ void security_fixup_ops(struct security_operations *ops)
        set_to_cap_if_null(ops, key_free);
        set_to_cap_if_null(ops, key_permission);
        set_to_cap_if_null(ops, key_getsecurity);
-       set_to_cap_if_null(ops, key_session_to_parent);
 #endif /* CONFIG_KEYS */
 #ifdef CONFIG_AUDIT
        set_to_cap_if_null(ops, audit_rule_init);

diff --git a/security/keys/keyctl.c b/security/keys/keyctl.c
index e9c2e7c..34b302b 100644 (file)
--- a/security/keys/keyctl.c
+++ b/security/keys/keyctl.c
@@ -1295,13 +1295,6 @@ long keyctl_session_to_parent(void)
            mycred->tgcred->session_keyring->uid != mycred->euid)
                goto not_permitted;
 
-       /* the LSM must permit the replacement of the parent's keyring with the
-        * keyring from this process */
-       ret = security_key_session_to_parent(mycred, pcred,
-                                            key_ref_to_ptr(keyring_r));
-       if (ret < 0)
-               goto not_permitted;
-
        /* if there's an already pending keyring replacement, then we replace
         * that */
        oldcred = parent->replacement_session_keyring;

diff --git a/security/security.c b/security/security.c
index 5cf9ca6..490f777 100644 (file)
--- a/security/security.c
+++ b/security/security.c
@@ -1262,13 +1262,6 @@ int security_key_getsecurity(struct key *key, char **_buffer)
        return security_ops->key_getsecurity(key, _buffer);
 }
 
-int security_key_session_to_parent(const struct cred *cred,
-                                  const struct cred *parent_cred,
-                                  struct key *key)
-{
-       return security_ops->key_session_to_parent(cred, parent_cred, key);
-}
-
 #endif /* CONFIG_KEYS */
 
 #ifdef CONFIG_AUDIT