DO NOT MERGE Fake 29.0 sepolicy prebuilts
I took current AOSP policy as base, then removed sepolicy so that the
set of type and attributes was a subset of types and attributes in Q
sepolicy, with exception of those that have not yet been cleand up in
current AOSP:
mediaswcodec_server
netd_socket
mediaextractor_update_service
thermalserviced
thermalserviced_exec
Bug: 133196056
Test: n/a
Change-Id: I2cbe749777684146114c89e1e6fc3f07400c0ae5
diff --git a/prebuilts/api/29.0/public/mediaextractor.te b/prebuilts/api/29.0/public/mediaextractor.te
new file mode 100644
index 0000000..24e9493
--- /dev/null
+++ b/prebuilts/api/29.0/public/mediaextractor.te
@@ -0,0 +1,77 @@
+# mediaextractor - multimedia daemon
+type mediaextractor, domain;
+type mediaextractor_exec, system_file_type, exec_type, file_type;
+type mediaextractor_tmpfs, file_type;
+
+typeattribute mediaextractor mlstrustedsubject;
+
+binder_use(mediaextractor)
+binder_call(mediaextractor, binderservicedomain)
+binder_call(mediaextractor, appdomain)
+binder_service(mediaextractor)
+
+add_service(mediaextractor, mediaextractor_service)
+allow mediaextractor mediametrics_service:service_manager find;
+allow mediaextractor hidl_token_hwservice:hwservice_manager find;
+
+allow mediaextractor system_server:fd use;
+
+hal_client_domain(mediaextractor, hal_cas)
+hal_client_domain(mediaextractor, hal_allocator)
+
+r_dir_file(mediaextractor, cgroup)
+allow mediaextractor proc_meminfo:file r_file_perms;
+
+crash_dump_fallback(mediaextractor)
+
+# allow mediaextractor read permissions for file sources
+allow mediaextractor sdcard_type:file { getattr read };
+allow mediaextractor media_rw_data_file:file { getattr read };
+allow mediaextractor { app_data_file privapp_data_file }:file { getattr read };
+
+# Read resources from open apk files passed over Binder
+allow mediaextractor apk_data_file:file { read getattr };
+allow mediaextractor asec_apk_file:file { read getattr };
+allow mediaextractor ringtone_file:file { read getattr };
+
+# scan extractor library directory to dynamically load extractors
+allow mediaextractor system_file:dir { read open };
+
+get_prop(mediaextractor, device_config_media_native_prop)
+
+userdebug_or_eng(`
+ # Allow extractor to add update service.
+
+ # Allow extractor to load media extractor plugins from update apk.
+ allow mediaextractor apk_data_file:dir search;
+ allow mediaextractor apk_data_file:file { execute open };
+')
+
+###
+### neverallow rules
+###
+
+# mediaextractor should never execute any executable without a
+# domain transition
+neverallow mediaextractor { file_type fs_type }:file execute_no_trans;
+
+# The goal of the mediaserver split is to place media processing code into
+# restrictive sandboxes with limited responsibilities and thus limited
+# permissions. Example: Audioserver is only responsible for controlling audio
+# hardware and processing audio content. Cameraserver does the same for camera
+# hardware/content. Etc.
+#
+# Media processing code is inherently risky and thus should have limited
+# permissions and be isolated from the rest of the system and network.
+# Lengthier explanation here:
+# https://android-developers.googleblog.com/2016/05/hardening-media-stack.html
+neverallow mediaextractor domain:{ tcp_socket udp_socket rawip_socket } *;
+
+# mediaextractor should not be opening /data files directly. Any files
+# it touches (with a few exceptions) need to be passed to it via a file
+# descriptor opened outside the process.
+neverallow mediaextractor {
+ data_file_type
+ -zoneinfo_data_file # time zone data from /data/misc/zoneinfo
+ userdebug_or_eng(`-apk_data_file') # for loading media extractor plugins
+}:file open;