9ec532752d
Any FUSE filesystem will receive the 'fuse' type when mounted. It is possible to change this behaviour by specifying the "context=" or "fscontext=" option in mount(). Because 'fuse' has historically been used only for the emulated storage, it also received the 'sdcard_type' attribute. Replace the 'sdcard_type' attribute from 'fuse' with the new 'fusefs_type'. This attribute can be attached on derived types (such as app_fusefs). This change: - Remove the neverallow restriction on this new type. This means any custom FUSE implementation can be mounted/unmounted (if the correct allow rule is added). See domain.te. - Change the attribute of 'fuse' from 'sdcard_type' to 'fusefs_type'. See file.te. - Modify all references to 'sdcard_type' to explicitly include 'fuse' for compatibility reason. Bug: 177481425 Bug: 190804537 Test: Build and boot aosp_cf_x86_64_phone-userdebug Change-Id: Id4e410a049f72647accd4c3cf43eaa55e94c318f
179 lines
7.8 KiB
Text
179 lines
7.8 KiB
Text
# installer daemon
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type installd, domain;
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type installd_exec, system_file_type, exec_type, file_type;
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typeattribute installd mlstrustedsubject;
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allow installd self:global_capability_class_set { chown dac_override dac_read_search 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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# FS_IOC_ENABLE_VERITY and FS_IOC_MEASURE_VERITY (or in old implementation used in installd,
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# FS_IOC_SET_VERITY_MEASUREMENT) ioctls on APKs in /data/app, to support fsverity.
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# TODO(b/120629632): this path is deprecated, remove when possible.
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allowxperm installd apk_data_file:file ioctl {
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FS_IOC_ENABLE_VERITY FS_IOC_MEASURE_VERITY
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};
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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_v2:dir create_dir_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 JARs in /vendor/framework
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r_dir_file(installd, vendor_framework_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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# Also, allow read for lnk_file so that we can process /data/user/0 links when
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# optimizing application code.
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allow installd system_data_file:lnk_file { create getattr read setattr unlink };
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# Manage lower filesystem via pass_through mounts
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allow installd mnt_pass_through_file:dir r_dir_perms;
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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 { sdcard_type fuse }:dir { search open read write remove_name getattr rmdir };
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allow installd { sdcard_type fuse }:file { getattr unlink };
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# Create app's mirror data directory in /data_mirror, and bind mount the real directory to it
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allow installd mirror_data_file:dir { create_dir_perms mounton };
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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/misc/installd/layout_version.* file
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allow installd install_data_file:file create_file_perms;
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allow installd install_data_file:dir rw_dir_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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allow installd app_data_file_type:dir { create_dir_perms relabelfrom relabelto };
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allow installd app_data_file_type: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_root_file:dir { create_dir_perms relabelfrom };
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allow installd user_profile_data_file:dir { create_dir_perms relabelto };
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allow installd user_profile_data_file:file create_file_perms;
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allow installd user_profile_data_file:file unlink;
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# Allow zygote to unmount mirror directories
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allow installd labeledfs:filesystem unmount;
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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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# Allow installd to read /proc/filesystems
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allow installd proc_filesystems:file r_file_perms;
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#add for move app to sd card
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get_prop(installd, storage_config_prop)
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# Allow installd to access apps installed on the Incremental File System
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# Accessing files on the Incremental File System uses fds opened in the context of vold.
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allow installd vold:fd use;
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###
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### Neverallow rules
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###
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# only system_server, installd, dumpstate, and servicemanager 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 -servicemanager } installd:binder call;
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neverallow installd {
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domain
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-system_server
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-servicemanager
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userdebug_or_eng(`-su')
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}:binder call;
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