606d2fd665
Introduce the add_service() macro which wraps up add/find
permissions for the source domain with a neverallow preventing
others from adding it. Only a particular domain should
add a particular service.
Use the add_service() macro to automatically add a neverallow
that prevents other domains from adding the service.
mediadrmserver was adding services labeled mediaserver_service.
Drop the add permission as it should just need the find
permission.
Additionally, the macro adds the { add find } permission which
causes some existing neverallow's to assert. Adjust those
neverallow's so "self" can always find.
Test: compile and run on hikey and emulator. No new denials were
found, and all services, where applicable, seem to be running OK.
Change-Id: Ibbd2a5304edd5f8b877bc86852b0694732be993c
Signed-off-by: William Roberts <william.c.roberts@intel.com>
144 lines
4.9 KiB
Text
144 lines
4.9 KiB
Text
# mediaserver - multimedia daemon
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type mediaserver, domain;
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type mediaserver_exec, exec_type, file_type;
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typeattribute mediaserver mlstrustedsubject;
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net_domain(mediaserver)
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r_dir_file(mediaserver, sdcard_type)
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r_dir_file(mediaserver, cgroup)
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# stat /proc/self
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allow mediaserver proc:lnk_file getattr;
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# open /vendor/lib/mediadrm
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allow mediaserver system_file:dir r_dir_perms;
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userdebug_or_eng(`
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# ptrace to processes in the same domain for memory leak detection
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allow mediaserver self:process ptrace;
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')
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binder_use(mediaserver)
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binder_call(mediaserver, binderservicedomain)
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binder_call(mediaserver, appdomain)
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binder_service(mediaserver)
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allow mediaserver media_data_file:dir create_dir_perms;
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allow mediaserver media_data_file:file create_file_perms;
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allow mediaserver app_data_file:dir search;
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allow mediaserver app_data_file:file rw_file_perms;
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allow mediaserver sdcard_type:file write;
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allow mediaserver gpu_device:chr_file rw_file_perms;
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allow mediaserver video_device:dir r_dir_perms;
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allow mediaserver video_device:chr_file rw_file_perms;
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set_prop(mediaserver, audio_prop)
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# XXX Label with a specific type?
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allow mediaserver sysfs:file r_file_perms;
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# Read resources from open apk files passed over Binder.
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allow mediaserver apk_data_file:file { read getattr };
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allow mediaserver asec_apk_file:file { read getattr };
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allow mediaserver ringtone_file:file { read getattr };
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# Read /data/data/com.android.providers.telephony files passed over Binder.
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allow mediaserver radio_data_file:file { read getattr };
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# Use pipes passed over Binder from app domains.
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allow mediaserver appdomain:fifo_file { getattr read write };
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allow mediaserver rpmsg_device:chr_file rw_file_perms;
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# Inter System processes communicate over named pipe (FIFO)
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allow mediaserver system_server:fifo_file r_file_perms;
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r_dir_file(mediaserver, media_rw_data_file)
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# Grant access to read files on appfuse.
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allow mediaserver app_fuse_file:file { read getattr };
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# Read/[write] to /proc/net/xt_qtaguid/ctrl and /dev/xt_qtaguid
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allow mediaserver qtaguid_proc:file rw_file_perms;
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allow mediaserver qtaguid_device:chr_file r_file_perms;
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# Allow abstract socket connection
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allow mediaserver rild:unix_stream_socket { connectto read write setopt };
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# Needed on some devices for playing DRM protected content,
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# but seems expected and appropriate for all devices.
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unix_socket_connect(mediaserver, drmserver, drmserver)
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# Needed on some devices for playing audio on paired BT device,
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# but seems appropriate for all devices.
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unix_socket_connect(mediaserver, bluetooth, bluetooth)
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# Connect to tee service.
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allow mediaserver tee:unix_stream_socket connectto;
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add_service(mediaserver, mediaserver_service)
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allow mediaserver activity_service:service_manager find;
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allow mediaserver appops_service:service_manager find;
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allow mediaserver audioserver_service:service_manager find;
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allow mediaserver cameraserver_service:service_manager find;
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allow mediaserver batterystats_service:service_manager find;
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allow mediaserver drmserver_service:service_manager find;
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allow mediaserver mediaextractor_service:service_manager find;
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allow mediaserver mediacodec_service:service_manager find;
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allow mediaserver mediametrics_service:service_manager find;
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allow mediaserver media_session_service:service_manager find;
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allow mediaserver permission_service:service_manager find;
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allow mediaserver power_service:service_manager find;
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allow mediaserver processinfo_service:service_manager find;
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allow mediaserver scheduling_policy_service:service_manager find;
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allow mediaserver surfaceflinger_service:service_manager find;
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# for ModDrm/MediaPlayer
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allow mediaserver mediadrmserver_service:service_manager find;
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# /oem access
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allow mediaserver oemfs:dir search;
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allow mediaserver oemfs:file r_file_perms;
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use_drmservice(mediaserver)
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allow mediaserver drmserver:drmservice {
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consumeRights
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setPlaybackStatus
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openDecryptSession
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closeDecryptSession
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initializeDecryptUnit
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decrypt
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finalizeDecryptUnit
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pread
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};
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# only allow unprivileged socket ioctl commands
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allowxperm mediaserver self:{ rawip_socket tcp_socket udp_socket }
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ioctl { unpriv_sock_ioctls unpriv_tty_ioctls };
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# Access to /data/media.
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# This should be removed if sdcardfs is modified to alter the secontext for its
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# accesses to the underlying FS.
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allow mediaserver media_rw_data_file:dir create_dir_perms;
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allow mediaserver media_rw_data_file:file create_file_perms;
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# Access to /data/preloads
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allow mediaserver preloads_data_file:file { getattr read ioctl };
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allow mediaserver ion_device:chr_file r_file_perms;
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allow mediaserver hal_graphics_allocator:fd use;
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allow mediaserver system_server:fd use;
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###
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### neverallow rules
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###
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# mediaserver should never execute any executable without a
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# domain transition
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neverallow mediaserver { file_type fs_type }:file execute_no_trans;
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# do not allow privileged socket ioctl commands
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neverallowxperm mediaserver domain:{ rawip_socket tcp_socket udp_socket } ioctl priv_sock_ioctls;
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