6067b53d4f
A vendor has an audio HAL implementation for Android Automotive that
controls amplifiers with tcp sockets. This violates a neverallow rule
in 'public/hal_audio.te':
neverallow hal_audio_server domain:{ tcp_socket udp_socket rawip_socket
} *;
This rule prevents any audio HAL server from accessing sockets; But
public/hal_neverallows.te, line 19 exempts HAL servers on automotive
devices; because in a car it is common to have external modules
accessible over in-vehicle networks.
Therefore, the existing neverallow rule in hal_audio.te is a duplicate;
and this CL removes this rule.
Vendors on automotive devices should refer to 'vendor/hal_audio_default.te',
by (1) creating a new type; (2) associating the type with the
'hal_automotive_socket_exemption' attribute.
Bug: 150400684
Test: tested with the following rules in 'vendor/hal_audio_default.te'
Test: type harmon_amplifier, domain;
Test: typeattribute hal_audio_default hal_automotive_socket_exemption;
Test: allow hal_audio_default harmon_amplifier:tcp_socket connect;
Test: m -j should compile sepolicy without complaints
Change-Id: I517b050d0582d08f94f35ba815a030121385f319
37 lines
1.2 KiB
Text
37 lines
1.2 KiB
Text
# HwBinder IPC from client to server, and callbacks
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binder_call(hal_audio_client, hal_audio_server)
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binder_call(hal_audio_server, hal_audio_client)
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hal_attribute_hwservice(hal_audio, hal_audio_hwservice)
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allow hal_audio ion_device:chr_file r_file_perms;
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r_dir_file(hal_audio, proc)
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r_dir_file(hal_audio, proc_asound)
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allow hal_audio_server audio_device:dir r_dir_perms;
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allow hal_audio_server audio_device:chr_file rw_file_perms;
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# Needed to provide debug dump output via dumpsys' pipes.
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allow hal_audio shell:fd use;
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allow hal_audio shell:fifo_file write;
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allow hal_audio dumpstate:fd use;
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allow hal_audio dumpstate:fifo_file write;
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# Needed to allow sound trigger hal to access shared memory from apps.
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allow hal_audio_server appdomain:fd use;
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# allow hal audio to use vnbinder
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vndbinder_use(hal_audio)
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###
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### neverallow rules
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###
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# Should never execute any executable without a domain transition
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neverallow hal_audio_server { file_type fs_type }:file execute_no_trans;
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# Only audio HAL may directly access the audio hardware
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neverallow { halserverdomain -hal_audio_server -hal_omx_server } audio_device:chr_file *;
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get_prop(hal_audio, bluetooth_a2dp_offload_prop)
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get_prop(hal_audio, bluetooth_audio_hal_prop)
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