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>
30 lines
1 KiB
Text
30 lines
1 KiB
Text
# mediacodec - audio and video codecs live here
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type mediacodec, domain;
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type mediacodec_exec, exec_type, file_type;
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typeattribute mediacodec mlstrustedsubject;
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binder_use(mediacodec)
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binder_call(mediacodec, binderservicedomain)
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binder_call(mediacodec, appdomain)
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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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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_graphics_allocator: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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# mediacodec should never need network access. Disallow network sockets.
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neverallow mediacodec domain:{ tcp_socket udp_socket rawip_socket } *;
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