Do not allow apps to access network address file
Bug: 18068520
Bug: 21852542
Change-Id: I080547c61cbaacb18e003a9b2366e2392a6521ff
diff --git a/file.te b/file.te
index 623bb8d..d3b0979 100644
--- a/file.te
+++ b/file.te
@@ -21,6 +21,7 @@
type sysfs_bluetooth_writable, fs_type, sysfs_type, mlstrustedobject;
type sysfs_nfc_power_writable, fs_type, sysfs_type, mlstrustedobject;
type sysfs_wake_lock, fs_type, sysfs_type;
+type sysfs_mac_address, fs_type, sysfs_type;
# /sys/devices/system/cpu
type sysfs_devices_system_cpu, fs_type, sysfs_type;
# /sys/module/lowmemorykiller
diff --git a/system_server.te b/system_server.te
index 2a16642..0c4df43 100644
--- a/system_server.te
+++ b/system_server.te
@@ -417,6 +417,9 @@
# Traverse into expanded storage
allow system_server mnt_expand_file:dir r_dir_perms;
+# Allow system process to read network MAC address
+allow system_server sysfs_mac_address:file r_file_perms;
+
###
### Neverallow rules
###
diff --git a/untrusted_app.te b/untrusted_app.te
index 72d0a1b..bcadc52 100644
--- a/untrusted_app.te
+++ b/untrusted_app.te
@@ -142,3 +142,6 @@
# bugs, so we want to ensure untrusted_app never has this
# capability.
neverallow untrusted_app file_type:file link;
+
+# Do not allow untrusted_app to access network MAC address file
+neverallow untrusted_app sysfs_mac_address:file no_rw_file_perms;