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159 lines
6.6 KiB
159 lines
6.6 KiB
# installer daemon |
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type installd, domain; |
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type installd_exec, exec_type, file_type; |
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typeattribute installd mlstrustedsubject; |
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allow installd self:capability { chown dac_override fowner fsetid setgid setuid sys_admin }; |
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# Allow labeling of files under /data/app/com.example/oat/ |
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allow installd dalvikcache_data_file:dir relabelto; |
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allow installd dalvikcache_data_file:file { relabelto link }; |
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# Allow movement of APK files between volumes |
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allow installd apk_data_file:dir { create_dir_perms relabelfrom }; |
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allow installd apk_data_file:file { create_file_perms relabelfrom link }; |
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allow installd apk_data_file:lnk_file { create r_file_perms unlink }; |
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allow installd asec_apk_file:file r_file_perms; |
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allow installd apk_tmp_file:file { r_file_perms unlink }; |
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allow installd apk_tmp_file:dir { relabelfrom create_dir_perms }; |
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allow installd oemfs:dir r_dir_perms; |
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allow installd oemfs:file r_file_perms; |
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allow installd cgroup:dir create_dir_perms; |
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allow installd cgroup:{ file lnk_file } create_file_perms; |
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allow installd mnt_expand_file:dir { search getattr }; |
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# Check validity of SELinux context before use. |
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selinux_check_context(installd) |
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r_dir_file(installd, rootfs) |
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# Scan through APKs in /system/app and /system/priv-app |
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r_dir_file(installd, system_file) |
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# Scan through APKs in /vendor/app |
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r_dir_file(installd, vendor_app_file) |
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# Scan through Runtime Resource Overlay APKs in /vendor/overlay |
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r_dir_file(installd, vendor_overlay_file) |
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# Get file context |
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allow installd file_contexts_file:file r_file_perms; |
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# Get seapp_context |
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allow installd seapp_contexts_file:file r_file_perms; |
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# Search /data/app-asec and stat files in it. |
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allow installd asec_image_file:dir search; |
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allow installd asec_image_file:file getattr; |
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# Create /data/user and /data/user/0 if necessary. |
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# Also required to initially create /data/data subdirectories |
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# and lib symlinks before the setfilecon call. May want to |
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# move symlink creation after setfilecon in installd. |
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allow installd system_data_file:dir create_dir_perms; |
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allow installd system_data_file:lnk_file { create setattr unlink }; |
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# Upgrade /data/media for multi-user if necessary. |
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allow installd media_rw_data_file:dir create_dir_perms; |
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allow installd media_rw_data_file:file { getattr unlink }; |
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# restorecon new /data/media directory. |
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allow installd system_data_file:dir relabelfrom; |
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allow installd media_rw_data_file:dir relabelto; |
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# Delete /data/media files through sdcardfs, instead of going behind its back |
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allow installd tmpfs:dir r_dir_perms; |
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allow installd storage_file:dir search; |
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allow installd sdcardfs:dir { search open read write remove_name getattr rmdir }; |
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allow installd sdcardfs:file { getattr unlink }; |
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# Upgrade /data/misc/keychain for multi-user if necessary. |
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allow installd misc_user_data_file:dir create_dir_perms; |
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allow installd misc_user_data_file:file create_file_perms; |
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allow installd keychain_data_file:dir create_dir_perms; |
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allow installd keychain_data_file:file {r_file_perms unlink}; |
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# Create /data/.layout_version.* file |
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allow installd install_data_file:file create_file_perms; |
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# Create files under /data/dalvik-cache. |
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allow installd dalvikcache_data_file:dir create_dir_perms; |
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allow installd dalvikcache_data_file:file create_file_perms; |
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allow installd dalvikcache_data_file:lnk_file getattr; |
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# Create files under /data/resource-cache. |
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allow installd resourcecache_data_file:dir rw_dir_perms; |
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allow installd resourcecache_data_file:file create_file_perms; |
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# Upgrade from unlabeled userdata. |
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# Just need enough to remove and/or relabel it. |
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allow installd unlabeled:dir { getattr search relabelfrom rw_dir_perms rmdir }; |
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allow installd unlabeled:notdevfile_class_set { getattr relabelfrom rename unlink setattr }; |
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# Read pkg.apk file for input during dexopt. |
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allow installd unlabeled:file r_file_perms; |
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# Upgrade from before system_app_data_file was used for system UID apps. |
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# Just need enough to relabel it and to unlink removed package files. |
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# Directory access covered by earlier rule above. |
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allow installd system_data_file:notdevfile_class_set { getattr relabelfrom unlink }; |
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# Manage /data/data subdirectories, including initially labeling them |
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# upon creation via setfilecon or running restorecon_recursive, |
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# setting owner/mode, creating symlinks within them, and deleting them |
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# upon package uninstall. |
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# Types extracted from seapp_contexts type= fields. |
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allow installd { |
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system_app_data_file |
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bluetooth_data_file |
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nfc_data_file |
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radio_data_file |
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shell_data_file |
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app_data_file |
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}:dir { create_dir_perms relabelfrom relabelto }; |
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allow installd { |
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system_app_data_file |
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bluetooth_data_file |
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nfc_data_file |
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radio_data_file |
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shell_data_file |
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app_data_file |
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}:notdevfile_class_set { create_file_perms relabelfrom relabelto }; |
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# Similar for the files under /data/misc/profiles/ |
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allow installd user_profile_data_file:dir create_dir_perms; |
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allow installd user_profile_data_file:file create_file_perms; |
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allow installd user_profile_data_file:dir rmdir; |
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allow installd user_profile_data_file:file unlink; |
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# Files created/updated by profman dumps. |
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allow installd profman_dump_data_file:dir { search add_name write }; |
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allow installd profman_dump_data_file:file { create setattr open write }; |
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# Create and use pty created by android_fork_execvp(). |
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allow installd devpts:chr_file rw_file_perms; |
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# execute toybox for app relocation |
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allow installd toolbox_exec:file rx_file_perms; |
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# Allow installd to publish a binder service and make binder calls. |
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binder_use(installd) |
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add_service(installd, installd_service) |
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allow installd dumpstate:fifo_file { getattr write }; |
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# Allow installd to call into the system server so it can check permissions. |
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binder_call(installd, system_server) |
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allow installd permission_service:service_manager find; |
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# Allow installd to read and write quotas |
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allow installd block_device:dir { search }; |
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allow installd labeledfs:filesystem { quotaget quotamod }; |
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# Allow installd to delete from /data/preloads when trimming data caches |
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# TODO b/34690396 Remove when time-based purge policy for preloads is implemented in system_server |
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allow installd preloads_data_file:file { r_file_perms unlink }; |
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allow installd preloads_data_file:dir { r_dir_perms write remove_name rmdir }; |
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allow installd preloads_media_file:file { r_file_perms unlink }; |
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allow installd preloads_media_file:dir { r_dir_perms write remove_name rmdir }; |
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### |
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### Neverallow rules |
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### |
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# only system_server, installd and dumpstate may interact with installd over binder |
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neverallow { domain -system_server -dumpstate -installd } installd_service:service_manager find; |
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neverallow { domain -system_server -dumpstate } installd:binder call; |
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neverallow installd { domain -system_server -servicemanager userdebug_or_eng(`-su') }:binder call;
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