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>

4 files changed, 0 insertions, 42 deletions

diff --git a/include/linux/security.h b/include/linux/security.h
index 73505f0c9b75..ac536eedec90 100644
--- 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 247c04edd468..8cc2b8f3b166 100644
--- 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 e9c2e7c584d9..34b302b40dea 100644
--- 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 5cf9ca6890f6..490f77753b2d 100644
--- 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