38c12828da
Better document the reasons behind the neverallow for tcp/udp sockets. Test: policy compiles. Change-Id: Iee386af3be6fc7495addc9300b5628d0fe61c8e9
56 lines
2 KiB
Text
56 lines
2 KiB
Text
# audioserver - audio services daemon
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type audioserver_exec, exec_type, file_type;
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init_daemon_domain(audioserver)
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r_dir_file(audioserver, sdcard_type)
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binder_use(audioserver)
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binder_call(audioserver, binderservicedomain)
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binder_call(audioserver, appdomain)
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binder_service(audioserver)
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hal_client_domain(audioserver, hal_audio)
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allow audioserver system_file:dir r_dir_perms;
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userdebug_or_eng(`
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# used for TEE sink - pcm capture for debug.
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allow audioserver media_data_file:dir create_dir_perms;
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allow audioserver audioserver_data_file:dir create_dir_perms;
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allow audioserver audioserver_data_file:file create_file_perms;
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# ptrace to processes in the same domain for memory leak detection
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allow audioserver self:process ptrace;
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')
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add_service(audioserver, audioserver_service)
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allow audioserver appops_service:service_manager find;
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allow audioserver batterystats_service:service_manager find;
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allow audioserver permission_service:service_manager find;
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allow audioserver power_service:service_manager find;
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allow audioserver scheduling_policy_service:service_manager find;
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# Grant access to audio files to audioserver
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allow audioserver audio_data_file:dir ra_dir_perms;
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allow audioserver audio_data_file:file create_file_perms;
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###
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### neverallow rules
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###
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# audioserver should never execute any executable without a
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# domain transition
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neverallow audioserver { file_type fs_type }:file execute_no_trans;
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# The goal of the mediaserver split is to place media processing code into
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# restrictive sandboxes with limited responsibilities and thus limited
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# permissions. Example: Audioserver is only responsible for controlling audio
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# hardware and processing audio content. Cameraserver does the same for camera
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# hardware/content. Etc.
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#
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# Media processing code is inherently risky and thus should have limited
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# permissions and be isolated from the rest of the system and network.
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# Lengthier explanation here:
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# https://android-developers.googleblog.com/2016/05/hardening-media-stack.html
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neverallow audioserver domain:{ tcp_socket udp_socket rawip_socket } *;
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