public/hal_audio.te

# HwBinder IPC from client to server, and callbacks
binder_call(hal_audio_client, hal_audio_server)
binder_call(hal_audio_server, hal_audio_client)

add_hwservice(hal_audio_server, hal_audio_hwservice)
allow hal_audio_client hal_audio_hwservice:hwservice_manager find;

allow hal_audio ion_device:chr_file r_file_perms;

r_dir_file(hal_audio, proc)
r_dir_file(hal_audio, proc_asound)
allow hal_audio audio_device:dir r_dir_perms;
allow hal_audio audio_device:chr_file rw_file_perms;

# Needed to provide debug dump output via dumpsys' pipes.
allow hal_audio shell:fd use;
allow hal_audio shell:fifo_file write;
allow hal_audio dumpstate:fd use;
allow hal_audio dumpstate:fifo_file write;

# allow hal audio to use vnbinder
vndbinder_use(hal_audio)

###
### neverallow rules
###

# Should never execute any executable without a domain transition
neverallow hal_audio_server { file_type fs_type }:file execute_no_trans;

# Should never need network access.
# Disallow network sockets.
neverallow hal_audio_server domain:{ tcp_socket udp_socket rawip_socket } *;

# Only audio HAL may directly access the audio hardware
neverallow { halserverdomain -hal_audio_server } audio_device:chr_file *;