diff --git a/app.te b/app.te
index 574243196fdcd2bfa80824fd912d41c4a34fd4fe..47c05aca1bfc493e0500635ea6ad9429846594ab 100644
--- a/app.te
+++ b/app.te
@@ -46,8 +46,8 @@ allow appdomain appdomain:fifo_file rw_file_perms;
 allow appdomain surfaceflinger:unix_stream_socket { read write setopt getattr getopt shutdown };
 
 # App sandbox file accesses.
-allow appdomain app_data_file:dir create_dir_perms;
-allow appdomain app_data_file:notdevfile_class_set create_file_perms;
+allow { appdomain -isolated_app } app_data_file:dir create_dir_perms;
+allow { appdomain -isolated_app } app_data_file:notdevfile_class_set create_file_perms;
 
 # lib subdirectory of /data/data dir is system-owned.
 allow appdomain system_data_file:dir r_dir_perms;
diff --git a/isolated_app.te b/isolated_app.te
index f17372aecb195f5042ebfa8a0d68695bfd4e950d..6fc7a99abb81cf61524138184fcd38e0eb1c99db 100644
--- a/isolated_app.te
+++ b/isolated_app.te
@@ -12,6 +12,12 @@
 type isolated_app, domain;
 app_domain(isolated_app)
 
+# Access already open app data files received over Binder or local socket IPC.
+allow isolated_app app_data_file:file { read write getattr };
+
+# Isolated apps should not directly open app data files themselves.
+neverallow isolated_app app_data_file:file open;
+
 # Isolated apps shouldn't be able to access the driver directly.
 neverallow isolated_app gpu_device:file { rw_file_perms execute };