platform_system_sepolicy/private/dex2oat.te

# dex2oat
type dex2oat, domain, coredomain;
type dex2oat_exec, system_file_type, exec_type, file_type;

userfaultfd_use(dex2oat)

r_dir_file(dex2oat, apk_data_file)
# Access to /vendor/app
r_dir_file(dex2oat, vendor_app_file)
# Access /vendor/framework
allow dex2oat vendor_framework_file:dir { getattr search };
allow dex2oat vendor_framework_file:file { getattr open read map };
# Access /vendor/overlay
r_dir_file(dex2oat, vendor_overlay_file);
# Vendor overlay can be found in vendor apex
allow dex2oat vendor_apex_metadata_file:dir { getattr search };

allow dex2oat tmpfs:file { read getattr map };

r_dir_file(dex2oat, dalvikcache_data_file)
allow dex2oat dalvikcache_data_file:file write;

# Acquire advisory lock on /system/framework/arm/*
allow dex2oat system_file:file lock;
allow dex2oat postinstall_file:file lock;

# Read already open asec_apk_file file descriptors passed by installd.
# Also allow reading unlabeled files, to allow for upgrading forward
# locked APKs.
allow dex2oat asec_apk_file:file { read map };
allow dex2oat unlabeled:file { read map };
allow dex2oat oemfs:file { read map };
allow dex2oat apk_tmp_file:dir search;
allow dex2oat apk_tmp_file:file r_file_perms;
allow dex2oat user_profile_data_file:file { getattr read lock map };

# Allow dex2oat to compile app's secondary dex files which were reported back to
# the framework.
allow dex2oat { privapp_data_file app_data_file }:file { getattr read write lock map };

# Allow dex2oat to find files and directories under /data/misc/apexdata/com.android.runtime.
allow dex2oat apex_module_data_file:dir search;

# Allow dex2oat to use devpts passed from odsign.
allow dex2oat odsign_devpts:chr_file { read write };

# Allow dex2oat to write to file descriptors from odrefresh for files
# in the staging area.
allow dex2oat apex_art_staging_data_file:dir r_dir_perms;
allow dex2oat apex_art_staging_data_file:file { getattr map read write unlink };

# Allow dex2oat to read artifacts from odrefresh.
allow dex2oat apex_art_data_file:dir r_dir_perms;
allow dex2oat apex_art_data_file:file r_file_perms;

# Allow dex2oat to read runtime native flag properties.
get_prop(dex2oat, device_config_runtime_native_prop)
get_prop(dex2oat, device_config_runtime_native_boot_prop)

# Allow dex2oat to read /apex/apex-info-list.xml
allow dex2oat apex_info_file:file r_file_perms;

# Allow dex2oat to use file descriptors passed from privileged programs.
allow dex2oat { artd installd odrefresh odsign }:fd use;

# Allow dex2oat to read the /proc filesystem for CPU features, etc.
allow dex2oat proc_filesystems:file r_file_perms;

##################
# A/B OTA Dexopt #
##################

# Allow dex2oat to use file descriptors from otapreopt.
allow dex2oat postinstall_dexopt:fd use;

# Allow dex2oat to read files under /postinstall (e.g. APKs under /system, /system/bin/linker).
allow dex2oat postinstall_file:dir r_dir_perms;
allow dex2oat postinstall_file:filesystem getattr;
allow dex2oat postinstall_file:lnk_file { getattr read };
allow dex2oat postinstall_file:file read;
# Allow dex2oat to use libraries under /postinstall/system (e.g. /system/lib/libc.so).
# TODO(b/120266448): Remove when Bionic libraries are part of the Runtime APEX.
allow dex2oat postinstall_file:file { execute getattr open };

# Allow dex2oat access to /postinstall/apex.
allow dex2oat postinstall_apex_mnt_dir:dir { getattr search };
allow dex2oat postinstall_apex_mnt_dir:{ file lnk_file } r_file_perms;

# Allow dex2oat access to files in /data/ota.
allow dex2oat ota_data_file:dir ra_dir_perms;
allow dex2oat ota_data_file:file r_file_perms;

# Create and read symlinks in /data/ota/dalvik-cache. This is required for PIC mode boot images,
# where the oat file is symlinked to the original file in /system.
allow dex2oat ota_data_file:lnk_file { create read };

# It would be nice to tie this down, but currently, because of how images are written, we can't
# pass file descriptors for the preopted boot image to dex2oat. So dex2oat needs to be able to
# create them itself (and make them world-readable).
allow dex2oat ota_data_file:file { create w_file_perms setattr };

###############
# APEX Update #
###############

# /dev/zero is inherited.
allow dex2oat apexd:fd use;

# Allow dex2oat to use file descriptors from preinstall.

##############
# Neverallow #
##############

neverallow dex2oat app_data_file_type:notdevfile_class_set open;