Add microdroid specific sepolicy
Microdroid will have a separate sepolicy, apart from the core policy.
This is the first step; For now it's a simple copy of system/sepolicy.
For the future work, it will be stripped.
Bug: 189165759
Test: boot microdroid and see selinux enforced
Change-Id: I2fee39f7231560b49c93bd5e8d0feeffada40938
diff --git a/microdroid/sepolicy/system/private/mlstrustedsubject.te b/microdroid/sepolicy/system/private/mlstrustedsubject.te
new file mode 100644
index 0000000..22482d9
--- /dev/null
+++ b/microdroid/sepolicy/system/private/mlstrustedsubject.te
@@ -0,0 +1,30 @@
+# MLS override can't be used to access private app data.
+
+# Apps should not normally be mlstrustedsubject, but if they must be
+# they cannot use this to access app private data files; their own app
+# data files must use a different label.
+
+neverallow {
+ mlstrustedsubject
+ -installd
+ -iorap_prefetcherd
+ -iorap_inode2filename
+} { app_data_file privapp_data_file }:file ~{ read write map getattr ioctl lock append };
+
+neverallow {
+ mlstrustedsubject
+ -installd
+ -iorap_prefetcherd
+ -iorap_inode2filename
+} { app_data_file privapp_data_file }:dir ~{ read getattr search };
+
+neverallow {
+ mlstrustedsubject
+ -installd
+ -iorap_prefetcherd
+ -iorap_inode2filename
+ -system_server
+ -adbd
+ -runas
+ -zygote
+} { app_data_file privapp_data_file }:dir { read getattr search };