1# mediametrics - daemon for collecting media.metrics data 2type mediametrics, domain; 3type mediametrics_exec, exec_type, file_type; 4 5 6binder_use(mediametrics) 7binder_call(mediametrics, binderservicedomain) 8binder_service(mediametrics) 9 10add_service(mediametrics, mediametrics_service) 11 12allow mediametrics system_server:fd use; 13 14r_dir_file(mediametrics, cgroup) 15allow mediametrics proc_meminfo:file r_file_perms; 16 17# allows interactions with dumpsys to GMScore 18allow mediametrics app_data_file:file write; 19 20### 21### neverallow rules 22### 23 24# mediametrics should never execute any executable without a 25# domain transition 26neverallow mediametrics { file_type fs_type }:file execute_no_trans; 27 28# The goal of the mediaserver split is to place media processing code into 29# restrictive sandboxes with limited responsibilities and thus limited 30# permissions. Example: Audioserver is only responsible for controlling audio 31# hardware and processing audio content. Cameraserver does the same for camera 32# hardware/content. Etc. 33# 34# Media processing code is inherently risky and thus should have limited 35# permissions and be isolated from the rest of the system and network. 36# Lengthier explanation here: 37# https://android-developers.googleblog.com/2016/05/hardening-media-stack.html 38neverallow mediametrics domain:{ tcp_socket udp_socket rawip_socket } *; 39