selinux rules for codec process

Bug: 22775369

Change-Id: Ic6abe3d0e18ba6f7554d027e0ec05fd19011709b

dumpstate.te

@@ -48,9 +48,9 @@ allow dumpstate { appdomain autoplay_app system_server }:process signal;
 
 # Signal native processes to dump their stack.
 # This list comes from native_processes_to_dump in dumpstate/utils.c
-allow dumpstate { audioserver cameraserver drmserver mediaserver mediaextractor sdcardd surfaceflinger }:process signal;
+allow dumpstate { audioserver cameraserver drmserver mediaserver mediacodec mediaextractor sdcardd surfaceflinger }:process signal;
 # Ask debuggerd for the backtraces of these processes.
-allow dumpstate { audioserver cameraserver drmserver mediaserver mediaextractor sdcardd surfaceflinger }:debuggerd dump_backtrace;
+allow dumpstate { audioserver cameraserver drmserver mediaserver mediacodec mediaextractor sdcardd surfaceflinger }:debuggerd dump_backtrace;
 
 # Execute and transition to the vdc domain
 domain_auto_trans(dumpstate, vdc_exec, vdc)

file_contexts

@@ -168,6 +168,7 @@
 /system/bin/mediaserver	u:object_r:mediaserver_exec:s0
 /system/bin/cameraserver	u:object_r:cameraserver_exec:s0
 /system/bin/mediaextractor	u:object_r:mediaextractor_exec:s0
+/system/bin/mediacodec	u:object_r:mediacodec_exec:s0
 /system/bin/mdnsd	u:object_r:mdnsd_exec:s0
 /system/bin/installd	u:object_r:installd_exec:s0
 /system/bin/otapreopt   u:object_r:otapreopt_exec:s0

mediacodec.te

+# mediacodec - audio and video codecs live here
+type mediacodec, domain;
+type mediacodec_exec, exec_type, file_type;
+
+typeattribute mediacodec mlstrustedsubject;
+
+init_daemon_domain(mediacodec)
+
+binder_use(mediacodec)
+binder_call(mediacodec, binderservicedomain)
+binder_call(mediacodec, appdomain)
+binder_service(mediacodec)
+
+allow mediacodec mediacodec_service:service_manager add;
+allow mediacodec gpu_device:chr_file rw_file_perms;
+allow mediacodec video_device:chr_file rw_file_perms;
+allow mediacodec ion_device:chr_file r_file_perms;
+
+###
+### neverallow rules
+###
+
+# mediacodec should never execute any executable without a
+# domain transition
+neverallow mediacodec { file_type fs_type }:file execute_no_trans;
+
+# mediacodec should never need network access. Disallow all sockets
+# other than those needed for normal system functions
+neverallow mediacodec { domain -debuggerd -dumpstate -adbd -mediacodec -logd userdebug_or_eng(`-su')}:socket_class_set *;

mediaserver.te

@@ -95,6 +95,7 @@ allow mediaserver cameraproxy_service:service_manager find;
 allow mediaserver batterystats_service:service_manager find;
 allow mediaserver drmserver_service:service_manager find;
 allow mediaserver mediaextractor_service:service_manager find;
+allow mediaserver mediacodec_service:service_manager find;
 allow mediaserver mediaserver_service:service_manager { add find };
 allow mediaserver media_session_service:service_manager find;
 allow mediaserver permission_service:service_manager find;

nfc.te

@@ -21,6 +21,7 @@ allow nfc sysfs:file write;
 allow nfc mediaserver_service:service_manager find;
 allow nfc audioserver_service:service_manager find;
 allow nfc mediaextractor_service:service_manager find;
+allow nfc mediacodec_service:service_manager find;
 
 allow nfc nfc_service:service_manager { add find };
 allow nfc radio_service:service_manager find;

platform_app.te

@@ -43,6 +43,7 @@ allow platform_app cameraserver_service:service_manager find;
 allow platform_app drmserver_service:service_manager find;
 allow platform_app mediaserver_service:service_manager find;
 allow platform_app mediaextractor_service:service_manager find;
+allow platform_app mediacodec_service:service_manager find;
 allow platform_app persistent_data_block_service:service_manager find;
 allow platform_app radio_service:service_manager find;
 allow platform_app surfaceflinger_service:service_manager find;

priv_app.te

@@ -24,6 +24,7 @@ allow priv_app cameraserver_service:service_manager find;
 allow priv_app drmserver_service:service_manager find;
 allow priv_app mediaserver_service:service_manager find;
 allow priv_app mediaextractor_service:service_manager find;
+allow priv_app mediacodec_service:service_manager find;
 allow priv_app nfc_service:service_manager find;
 allow priv_app radio_service:service_manager find;
 allow priv_app surfaceflinger_service:service_manager find;

service.te

@@ -10,6 +10,7 @@ type inputflinger_service,      service_manager_type;
 type keystore_service,          service_manager_type;
 type mediaserver_service,       service_manager_type;
 type mediaextractor_service,    service_manager_type;
+type mediacodec_service,        service_manager_type;
 type nfc_service,               service_manager_type;
 type radio_service,             service_manager_type;
 type surfaceflinger_service,    service_manager_type;

service_contexts

@@ -68,6 +68,7 @@ media.camera.proxy                        u:object_r:cameraproxy_service:s0
 media.log                                 u:object_r:audioserver_service:s0
 media.player                              u:object_r:mediaserver_service:s0
 media.extractor                           u:object_r:mediaextractor_service:s0
+media.codec                               u:object_r:mediacodec_service:s0
 media.resource_manager                    u:object_r:mediaserver_service:s0
 media.radio                               u:object_r:audioserver_service:s0
 media.sound_trigger_hw                    u:object_r:audioserver_service:s0

system_server.te

@@ -139,13 +139,14 @@ binder_call(system_server, dumpstate)
 binder_service(system_server)
 
 # Ask debuggerd to dump backtraces for native stacks of interest.
-allow system_server { audioserver cameraserver mediaserver mediaextractor sdcardd surfaceflinger inputflinger }:debuggerd dump_backtrace;
+allow system_server { audioserver cameraserver mediaserver mediacodec mediaextractor sdcardd surfaceflinger inputflinger }:debuggerd dump_backtrace;
 
 # Read /proc/pid files for dumping stack traces of native processes.
 r_dir_file(system_server, audioserver)
 r_dir_file(system_server, cameraserver)
 r_dir_file(system_server, mediaserver)
 r_dir_file(system_server, mediaextractor)
+r_dir_file(system_server, mediacodec)
 r_dir_file(system_server, sdcardd)
 r_dir_file(system_server, surfaceflinger)
 r_dir_file(system_server, inputflinger)
@@ -390,6 +391,7 @@ allow system_server gatekeeper_service:service_manager find;
 allow system_server fingerprintd_service:service_manager find;
 allow system_server mediaserver_service:service_manager find;
 allow system_server mediaextractor_service:service_manager find;
+allow system_server mediacodec_service:service_manager find;
 allow system_server nfc_service:service_manager find;
 allow system_server radio_service:service_manager find;
 allow system_server system_server_service:service_manager { add find };

untrusted_app.te

@@ -72,6 +72,7 @@ allow untrusted_app drmserver_service:service_manager find;
 allow untrusted_app healthd_service:service_manager find;
 allow untrusted_app mediaserver_service:service_manager find;
 allow untrusted_app mediaextractor_service:service_manager find;
+allow untrusted_app mediacodec_service:service_manager find;
 allow untrusted_app nfc_service:service_manager find;
 allow untrusted_app radio_service:service_manager find;
 allow untrusted_app surfaceflinger_service:service_manager find;