vendor/mediacodec.te

type mediacodec, domain, mlstrustedsubject;
type mediacodec_exec, exec_type, vendor_file_type, file_type;

init_daemon_domain(mediacodec)

not_full_treble(`
    # on legacy devices, continue to allow /dev/binder traffic
    binder_use(mediacodec)
    binder_service(mediacodec)
    add_service(mediacodec, mediacodec_service)
    allow mediacodec mediametrics_service:service_manager find;
    allow mediacodec surfaceflinger_service:service_manager find;
')

# can route /dev/binder traffic to /dev/vndbinder
vndbinder_use(mediacodec)

hal_server_domain(mediacodec, hal_codec2)
hal_server_domain(mediacodec, hal_omx)

# mediacodec may use an input surface from a different Codec2 or OMX service
hal_client_domain(mediacodec, hal_codec2)
hal_client_domain(mediacodec, hal_omx)

hal_client_domain(mediacodec, hal_allocator)
hal_client_domain(mediacodec, hal_graphics_allocator)

allow mediacodec gpu_device:chr_file rw_file_perms;
allow mediacodec ion_device:chr_file rw_file_perms;
allow mediacodec video_device:chr_file rw_file_perms;
allow mediacodec video_device:dir search;

crash_dump_fallback(mediacodec)

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

# Media processing code is inherently risky and thus should have limited
# permissions and be isolated from the rest of the system and network.
# Lengthier explanation here:
# https://android-developers.googleblog.com/2016/05/hardening-media-stack.html
neverallow mediacodec domain:{ tcp_socket udp_socket rawip_socket } *;