15f0f9234c
Fixes the following denials:
avc: denied { getattr } for path="/dev/dma_heap/system" dev="tmpfs"
ino=534 scontext=u:r:mediatranscoding:s0
tcontext=u:object_r:dmabuf_system_heap_device:s0 tclass=chr_file
permissive=0
Bug: 185867872
Test: No more DMA-BUF heap related denials from
CtsMediaTranscodingTestCases
Change-Id: I45b57b45e0db996f08b82618dcd085ba0f7e6ef6
64 lines
2.8 KiB
Text
64 lines
2.8 KiB
Text
# mediatranscoding - daemon for transcoding video and image.
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type mediatranscoding, domain;
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type mediatranscoding_exec, system_file_type, exec_type, file_type;
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type mediatranscoding_tmpfs, file_type;
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typeattribute mediatranscoding coredomain;
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init_daemon_domain(mediatranscoding)
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tmpfs_domain(mediatranscoding)
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allow mediatranscoding appdomain_tmpfs:file { getattr map read write };
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binder_use(mediatranscoding)
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binder_call(mediatranscoding, binderservicedomain)
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binder_call(mediatranscoding, appdomain)
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binder_service(mediatranscoding)
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add_service(mediatranscoding, mediatranscoding_service)
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hal_client_domain(mediatranscoding, hal_graphics_allocator)
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hal_client_domain(mediatranscoding, hal_configstore)
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hal_client_domain(mediatranscoding, hal_omx)
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hal_client_domain(mediatranscoding, hal_codec2)
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allow mediatranscoding mediaserver_service:service_manager find;
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allow mediatranscoding mediametrics_service:service_manager find;
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allow mediatranscoding mediaextractor_service:service_manager find;
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allow mediatranscoding package_native_service:service_manager find;
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allow mediatranscoding thermal_service:service_manager find;
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allow mediatranscoding system_server:fd use;
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allow mediatranscoding activity_service:service_manager find;
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# allow mediatranscoding service read/write permissions for file sources
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allow mediatranscoding sdcardfs:file { getattr read write };
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allow mediatranscoding media_rw_data_file:file { getattr read write };
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allow mediatranscoding apk_data_file:file { getattr read };
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allow mediatranscoding app_data_file:file { getattr read write };
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allow mediatranscoding shell_data_file:file { getattr read write };
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# allow mediatranscoding service write permission to statsd socket
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unix_socket_send(mediatranscoding, statsdw, statsd)
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# Allow mediatranscoding to access the DMA-BUF system heap
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allow mediatranscoding dmabuf_system_heap_device:chr_file r_file_perms;
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allow mediatranscoding gpu_device:dir search;
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# Allow mediatranscoding service to access media-related system properties
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get_prop(mediatranscoding, media_config_prop)
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# mediatranscoding should never execute any executable without a
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# domain transition
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neverallow mediatranscoding { 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 mediatranscoding domain:{ tcp_socket udp_socket rawip_socket } *;
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