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67 lines
2.5 KiB
67 lines
2.5 KiB
# mediacodec - audio and video codecs live here |
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type mediacodec, domain; |
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type mediacodec_exec, exec_type, vendor_file_type, file_type; |
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typeattribute mediacodec mlstrustedsubject; |
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# TODO(b/36375899) attributize this domain appropriately as hal_omx |
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# and use macro hal_server_domain |
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get_prop(mediacodec, hwservicemanager_prop) |
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# can route /dev/binder traffic to /dev/vndbinder |
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vndbinder_use(mediacodec) |
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not_full_treble(` |
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# on legacy devices, continue to allow /dev/binder traffic |
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binder_use(mediacodec) |
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binder_service(mediacodec) |
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add_service(mediacodec, mediacodec_service) |
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allow mediacodec mediametrics_service:service_manager find; |
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allow mediacodec surfaceflinger_service:service_manager find; |
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') |
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binder_call(mediacodec, binderservicedomain) |
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binder_call(mediacodec, appdomain) |
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# Allow mediacodec access to composer sync fences |
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allow mediacodec hal_graphics_composer:fd use; |
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allow mediacodec gpu_device:chr_file rw_file_perms; |
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allow mediacodec video_device:chr_file rw_file_perms; |
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allow mediacodec video_device:dir search; |
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allow mediacodec ion_device:chr_file rw_file_perms; |
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allow mediacodec hal_camera:fd use; |
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crash_dump_fallback(mediacodec) |
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add_hwservice(mediacodec, hal_omx_hwservice) |
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hal_client_domain(mediacodec, hal_allocator) |
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# allocate and use graphic buffers |
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hal_client_domain(mediacodec, hal_graphics_allocator) |
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# Recieve gralloc buffer FDs from bufferhubd. Note that mediacodec never |
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# directly connects to bufferhubd via PDX. Instead, a VR app acts as a bridge |
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# between those two: it talks to mediacodec via Binder and talks to bufferhubd |
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# via PDX. Thus, there is no need to use pdx_client macro. |
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allow mediacodec bufferhubd:fd use; |
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### |
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### neverallow rules |
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### |
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# mediacodec should never execute any executable without a |
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# domain transition |
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neverallow mediacodec { 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 mediacodec domain:{ tcp_socket udp_socket rawip_socket } *;
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