android_system_sepolicy/public/mediaswcodec.te

type mediaswcodec, domain;
type mediaswcodec_exec, system_file_type, exec_type, file_type;

hal_server_domain(mediaswcodec, hal_codec2)

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

hal_client_domain(mediaswcodec, hal_allocator)
hal_client_domain(mediaswcodec, hal_graphics_allocator)

# get aac_drc_* properties
get_prop(mediaswcodec, aac_drc_prop)

crash_dump_fallback(mediaswcodec)

# mediaswcodec_server should never execute any executable without a
# domain transition
neverallow mediaswcodec { 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 mediaswcodec domain:{ udp_socket rawip_socket } *;
neverallow mediaswcodec { domain userdebug_or_eng(`-su') }:tcp_socket *;

allow mediaswcodec dmabuf_system_heap_device:chr_file r_file_perms;
allow mediaswcodec dmabuf_system_secure_heap_device:chr_file r_file_perms;
allow mediaswcodec gpu_device:chr_file rw_file_perms;
allow mediaswcodec gpu_device:dir r_dir_perms;