1typeattribute installd coredomain; 2 3init_daemon_domain(installd) 4 5# Run migrate_legacy_obb_data.sh in its own sandbox. 6domain_auto_trans(installd, migrate_legacy_obb_data_exec, migrate_legacy_obb_data) 7allow installd shell_exec:file rx_file_perms; 8 9# Run dex2oat in its own sandbox. 10domain_auto_trans(installd, dex2oat_exec, dex2oat) 11 12# Run profman in its own sandbox. 13domain_auto_trans(installd, profman_exec, profman) 14 15# Run idmap in its own sandbox. 16domain_auto_trans(installd, idmap_exec, idmap) 17 18# For collecting bugreports. 19allow installd dumpstate:fd use; 20allow installd dumpstate:fifo_file r_file_perms; 21 22# Delete /system/bin/bcc generated artifacts 23allow installd app_exec_data_file:file unlink; 24 25# Capture userdata snapshots to /data/misc_[ce|de]/rollback and 26# subsequently restore them. 27allow installd rollback_data_file:dir create_dir_perms; 28allow installd rollback_data_file:file create_file_perms; 29 30# Allow installd to access the runtime feature flag properties. 31get_prop(installd, device_config_runtime_native_prop) 32get_prop(installd, device_config_runtime_native_boot_prop) 33 34# Allow installd to access odsign verification status 35get_prop(installd, odsign_prop) 36 37# Allow installd to delete files in /data/staging 38allow installd staging_data_file:file unlink; 39allow installd staging_data_file:dir { open read add_name remove_name rename rmdir search write getattr }; 40 41# Allow installd manage dirs in /data/misc_ce/0/sdksandbox 42allow installd sdk_sandbox_system_data_file:dir { create_dir_perms relabelfrom }; 43 44# Allow installd to enable fs-verity for app file passed as FD; 45allow installd { untrusted_app_all priv_app gmscore_app }:fd use; 46allowxperm installd app_data_file_type:file ioctl FS_IOC_ENABLE_VERITY; 47 48typeattribute installd mlstrustedsubject; 49allow installd self:global_capability_class_set { chown dac_override dac_read_search fowner fsetid setgid setuid sys_admin kill }; 50 51# Allow labeling of files under /data/app/com.example/oat/ 52allow installd dalvikcache_data_file:dir relabelto; 53allow installd dalvikcache_data_file:file { relabelto link }; 54 55# Allow movement of APK files between volumes 56allow installd apk_data_file:dir { create_dir_perms relabelfrom }; 57allow installd apk_data_file:file { create_file_perms relabelfrom link }; 58allow installd apk_data_file:lnk_file { create r_file_perms unlink }; 59 60allow installd asec_apk_file:file r_file_perms; 61allow installd apk_tmp_file:file { r_file_perms unlink }; 62allow installd apk_tmp_file:dir { relabelfrom create_dir_perms }; 63allow installd oemfs:dir r_dir_perms; 64allow installd oemfs:file r_file_perms; 65allow installd cgroup:dir create_dir_perms; 66allow installd cgroup_v2:dir create_dir_perms; 67allow installd mnt_expand_file:dir { search getattr }; 68# Check validity of SELinux context before use. 69selinux_check_context(installd) 70 71r_dir_file(installd, rootfs) 72# Scan through APKs in /system/app and /system/priv-app 73r_dir_file(installd, system_file) 74# Scan through APKs in /vendor/app 75r_dir_file(installd, vendor_app_file) 76# Scan through JARs in /vendor/framework 77r_dir_file(installd, vendor_framework_file) 78# Scan through Runtime Resource Overlay APKs in /vendor/overlay 79r_dir_file(installd, vendor_overlay_file) 80# Vendor overlay can be found in vendor apex 81allow installd vendor_apex_metadata_file:dir { getattr search }; 82# Get file context 83allow installd file_contexts_file:file r_file_perms; 84# Get seapp_context 85allow installd seapp_contexts_file:file r_file_perms; 86 87# Search /data/app-asec and stat files in it. 88allow installd asec_image_file:dir search; 89allow installd asec_image_file:file getattr; 90 91# Required to initially create subdirectories of /data/user/$userId 92# and lib symlinks before the setfilecon call. May want to 93# move symlink creation after setfilecon in installd. 94allow installd system_data_file:dir create_dir_perms; 95# Also, allow read for lnk_file so that we can process symlinks within 96# /data/user/$userId when optimizing application code. 97allow installd system_data_file:lnk_file { create getattr read setattr unlink }; 98 99# Manage lower filesystem via pass_through mounts 100allow installd mnt_pass_through_file:dir r_dir_perms; 101 102# Upgrade /data/media for multi-user if necessary. 103allow installd media_rw_data_file:dir create_dir_perms; 104allow installd media_rw_data_file:file { getattr unlink }; 105# restorecon new /data/media directory. 106allow installd system_data_file:dir relabelfrom; 107allow installd media_rw_data_file:dir relabelto; 108 109# Delete /data/media files through sdcardfs, instead of going behind its back 110allow installd media_userdir_file:dir r_dir_perms; 111allow installd tmpfs:dir r_dir_perms; 112allow installd storage_file:dir search; 113allow installd { sdcard_type fuse }:dir { search open read write remove_name getattr rmdir }; 114allow installd { sdcard_type fuse }:file { getattr unlink }; 115 116# Create app's mirror data directory in /data_mirror, and bind mount the real directory to it 117allow installd mirror_data_file:dir { create_dir_perms mounton }; 118 119# Upgrade /data/misc/keychain for multi-user if necessary. 120allow installd system_userdir_file:dir r_dir_perms; 121allow installd misc_user_data_file:dir create_dir_perms; 122allow installd misc_user_data_file:file create_file_perms; 123allow installd keychain_data_file:dir create_dir_perms; 124allow installd keychain_data_file:file {r_file_perms unlink}; 125 126# Create /data/misc/installd/layout_version.* file 127allow installd install_data_file:file create_file_perms; 128allow installd install_data_file:dir rw_dir_perms; 129 130# Create files under /data/dalvik-cache. 131allow installd dalvikcache_data_file:dir create_dir_perms; 132allow installd dalvikcache_data_file:file create_file_perms; 133allow installd dalvikcache_data_file:lnk_file getattr; 134 135# Create files under /data/resource-cache. 136allow installd resourcecache_data_file:dir rw_dir_perms; 137allow installd resourcecache_data_file:file create_file_perms; 138 139# Upgrade from unlabeled userdata. 140# Just need enough to remove and/or relabel it. 141allow installd unlabeled:dir { getattr search relabelfrom rw_dir_perms rmdir }; 142allow installd unlabeled:notdevfile_class_set { getattr relabelfrom rename unlink setattr }; 143# Read pkg.apk file for input during dexopt. 144allow installd unlabeled:file r_file_perms; 145 146# Upgrade from before system_app_data_file was used for system UID apps. 147# Just need enough to relabel it and to unlink removed package files. 148# Directory access covered by earlier rule above. 149allow installd system_data_file:notdevfile_class_set { getattr relabelfrom unlink }; 150 151# Manage /data/data subdirectories, including initially labeling them 152# upon creation via setfilecon or running restorecon_recursive, 153# setting owner/mode, creating symlinks within them, and deleting them 154# upon package uninstall. 155allow installd app_data_file_type:dir { create_dir_perms relabelfrom relabelto }; 156allow installd app_data_file_type:notdevfile_class_set { create_file_perms relabelfrom relabelto }; 157 158# Allow setting extended attributes (for project quota IDs) on dirs and files 159# and to enable project ID inheritance through FS_IOC_SETFLAGS 160# Added install_data_file to be able to create file under /data/misc/installd/ioctl_check 161allowxperm installd { app_data_file_type system_data_file install_data_file}:{ dir file } ioctl { 162 FS_IOC_FSGETXATTR 163 FS_IOC_FSSETXATTR 164 FS_IOC_GETFLAGS 165 FS_IOC_SETFLAGS 166}; 167 168# Similar for the files under /data/misc/profiles/ 169allow installd user_profile_root_file:dir { create_dir_perms relabelfrom }; 170allow installd user_profile_data_file:dir { create_dir_perms relabelto }; 171allow installd user_profile_data_file:file create_file_perms; 172allow installd user_profile_data_file:file unlink; 173 174# Allow zygote to unmount mirror directories 175allow installd labeledfs:filesystem unmount; 176 177# Files created/updated by profman dumps. 178allow installd profman_dump_data_file:dir { search add_name write }; 179allow installd profman_dump_data_file:file { create setattr open write }; 180 181# Create and use pty created by android_fork_execvp(). 182allow installd devpts:chr_file rw_file_perms; 183 184# execute toybox for app relocation 185allow installd toolbox_exec:file rx_file_perms; 186 187# Allow installd to publish a binder service and make binder calls. 188binder_use(installd) 189add_service(installd, installd_service) 190allow installd dumpstate:fifo_file { getattr write }; 191 192# Allow installd to call into the system server so it can check permissions. 193binder_call(installd, system_server) 194allow installd permission_service:service_manager find; 195 196# Allow installd to read and write quotas 197allow installd block_device:dir { search }; 198allow installd labeledfs:filesystem { quotaget quotamod }; 199 200# Allow installd to delete from /data/preloads when trimming data caches 201# TODO b/34690396 Remove when time-based purge policy for preloads is implemented in system_server 202allow installd preloads_data_file:file { r_file_perms unlink }; 203allow installd preloads_data_file:dir { r_dir_perms write remove_name rmdir }; 204allow installd preloads_media_file:file { r_file_perms unlink }; 205allow installd preloads_media_file:dir { r_dir_perms write remove_name rmdir }; 206 207# Allow installd to read /proc/filesystems 208allow installd proc_filesystems:file r_file_perms; 209 210#add for move app to sd card 211get_prop(installd, storage_config_prop) 212 213# Allow installd to access apps installed on the Incremental File System 214# Accessing files on the Incremental File System uses fds opened in the context of vold. 215allow installd vold:fd use; 216 217# on app uninstall, installd deletes the storage area keys for the app 218is_flag_enabled(RELEASE_UNLOCKED_STORAGE_API, ` 219 allow installd storage_area_key_file:dir { 220 open search write remove_name 221 lock read getattr rmdir 222 }; 223 allow installd storage_area_key_file:file unlink; 224') 225 226# Allow installd to delete the terminal app's data file. 227# `virtualizationservice_data_file` was used for a while, but it needs to be 228# deleted when terminal feature is disabled. 229# TODO(b/383026786): Remove this rule once the there is no 230# `virtualizationservice_data_file` in terminal app anymore.. 231allow installd virtualizationservice_data_file:file unlink; 232 233### 234### Neverallow rules 235### 236 237# only system_server, installd, dumpstate, and servicemanager may interact with installd over binder 238neverallow { domain -system_server -dumpstate -installd } installd_service:service_manager find; 239neverallow { domain -system_server -dumpstate -servicemanager } installd:binder call; 240neverallow installd { 241 domain 242 -system_server 243 -servicemanager 244 userdebug_or_eng(`-su') 245}:binder call; 246