diff --git a/drivers/staging/blackbox/blackbox_common.c b/drivers/staging/blackbox/blackbox_common.c
index 593ea92836b4c25f4d6d2442f7db7936c999a6e6..44bc2aa185f143c18ad2a6d5cc5e344fee418511 100644
--- a/drivers/staging/blackbox/blackbox_common.c
+++ b/drivers/staging/blackbox/blackbox_common.c
@@ -55,7 +55,7 @@ int full_write_file(const char *pfile_path, char *buf,
 	}
 
 	filp = file_open(pfile_path, O_CREAT | O_RDWR |
-			(is_append ? O_APPEND : O_TRUNC), 0);
+			(is_append ? O_APPEND : O_TRUNC), BBOX_FILE_LIMIT);
 	if (IS_ERR(filp)) {
 		bbox_print_err("open %s failed! [%ld]\n", pfile_path, PTR_ERR(filp));
 		return -EBADF;
@@ -113,8 +113,6 @@ static int create_new_dir(char *name)
 		ret = vfs_mkdir(d_inode(path.dentry), dentry, BBOX_DIR_LIMIT);
 		if (ret && ret != -EEXIST)
 			bbox_print_err("Create dir [%s] failed! ret: %d\n", name, ret);
-		else
-			change_own(name, AID_ROOT, AID_SYSTEM);
 
 		done_path_create(&path, dentry);
 	}
diff --git a/drivers/staging/blackbox/blackbox_core.c b/drivers/staging/blackbox/blackbox_core.c
index ec64088029f01684662db1294fec0d2ad8597b38..ff23b0593f094ae56f7136bf845e6faedb494bec 100644
--- a/drivers/staging/blackbox/blackbox_core.c
+++ b/drivers/staging/blackbox/blackbox_core.c
@@ -227,7 +227,6 @@ static void save_history_log(const char *log_root_dir, struct error_info *info,
 	scnprintf(history_log_path, sizeof(history_log_path) - 1,
 			"%s/%s", log_root_dir, HISTORY_LOG_NAME);
 	full_write_file(history_log_path, buf, strlen(buf), 1);
-	change_own(history_log_path, AID_ROOT, AID_SYSTEM);
 	ksys_sync();
 	kfree(buf);
 }