KEYS: Drop the permissions argument from __keyring_search_one()

Drop the permissions argument from __keyring_search_one() as the only caller
passes 0 here - which causes all checks to be skipped.

Signed-off-by: David Howells <[email protected]>

Author: dhowells

security/keys/internal.h

@@ -99,8 +99,7 @@ extern void __key_link_end(struct key *keyring,
 			   unsigned long prealloc);
 
 extern key_ref_t __keyring_search_one(key_ref_t keyring_ref,
-				      const struct keyring_index_key *index_key,
-				      key_perm_t perm);
+				      const struct keyring_index_key *index_key);
 
 extern struct key *keyring_search_instkey(struct key *keyring,
 					  key_serial_t target_id);

security/keys/key.c

@@ -847,7 +847,7 @@ key_ref_t key_create_or_update(key_ref_t keyring_ref,
 	 * update that instead if possible
 	 */
 	if (index_key.type->update) {
-		key_ref = __keyring_search_one(keyring_ref, &index_key, 0);
+		key_ref = __keyring_search_one(keyring_ref, &index_key);
 		if (!IS_ERR(key_ref))
 			goto found_matching_key;
 	}

security/keys/keyring.c

@@ -531,15 +531,14 @@ EXPORT_SYMBOL(keyring_search);
  * RCU is used to make it unnecessary to lock the keyring key list here.
  *
  * Returns a pointer to the found key with usage count incremented if
- * successful and returns -ENOKEY if not found.  Revoked keys and keys not
- * providing the requested permission are skipped over.
+ * successful and returns -ENOKEY if not found.  Revoked and invalidated keys
+ * are skipped over.
  *
  * If successful, the possession indicator is propagated from the keyring ref
  * to the returned key reference.
  */
 key_ref_t __keyring_search_one(key_ref_t keyring_ref,
-			       const struct keyring_index_key *index_key,
-			       key_perm_t perm)
+			       const struct keyring_index_key *index_key)
 {
 	struct keyring_list *klist;
 	struct key *keyring, *key;
@@ -560,8 +559,6 @@ key_ref_t __keyring_search_one(key_ref_t keyring_ref,
 			if (key->type == index_key->type &&
 			    (!key->type->match ||
 			     key->type->match(key, index_key->description)) &&
-			    key_permission(make_key_ref(key, possessed),
-					   perm) == 0 &&
 			    !(key->flags & ((1 << KEY_FLAG_INVALIDATED) |
 					    (1 << KEY_FLAG_REVOKED)))
 			    )