7397ebd1e1
The original fs-verity implementation requires CAP_SYS_ADMIN and thus the actual setup is proxied through installd. Instead, upstream FS_IOC_ENABLE_VERITY ioctl checks write permission to inode, and thus can happen in system_server. Also, replace the old measure ioctl with FS_IOC_SET_VERITY_MEASUREMENT. Note that although the number is name, they work differently. Test: set ro.apk_verity.mode=2, in-progress CTS passed without denial Bug: 112037636 Change-Id: I3e8d14321df8904dfed68b83aae8b3dd99c211ac
169 lines
7.1 KiB
Text
169 lines
7.1 KiB
Text
# installer daemon
|
|
type installd, domain;
|
|
type installd_exec, system_file_type, exec_type, file_type;
|
|
typeattribute installd mlstrustedsubject;
|
|
allow installd self:global_capability_class_set { chown dac_override dac_read_search fowner fsetid setgid setuid sys_admin };
|
|
|
|
# Allow labeling of files under /data/app/com.example/oat/
|
|
allow installd dalvikcache_data_file:dir relabelto;
|
|
allow installd dalvikcache_data_file:file { relabelto link };
|
|
|
|
# Allow movement of APK files between volumes
|
|
allow installd apk_data_file:dir { create_dir_perms relabelfrom };
|
|
allow installd apk_data_file:file { create_file_perms relabelfrom link };
|
|
allow installd apk_data_file:lnk_file { create r_file_perms unlink };
|
|
|
|
# FS_IOC_ENABLE_VERITY and FS_IOC_MEASURE_VERITY (or in old implementation used in installd,
|
|
# FS_IOC_SET_VERITY_MEASUREMENT) ioctls on APKs in /data/app, to support fsverity.
|
|
# TODO(b/120629632): this path is deprecated, remove when possible.
|
|
allowxperm installd apk_data_file:file ioctl {
|
|
FS_IOC_ENABLE_VERITY FS_IOC_MEASURE_VERITY
|
|
};
|
|
|
|
allow installd asec_apk_file:file r_file_perms;
|
|
allow installd apk_tmp_file:file { r_file_perms unlink };
|
|
allow installd apk_tmp_file:dir { relabelfrom create_dir_perms };
|
|
allow installd oemfs:dir r_dir_perms;
|
|
allow installd oemfs:file r_file_perms;
|
|
allow installd cgroup:dir create_dir_perms;
|
|
allow installd mnt_expand_file:dir { search getattr };
|
|
# Check validity of SELinux context before use.
|
|
selinux_check_context(installd)
|
|
|
|
r_dir_file(installd, rootfs)
|
|
# Scan through APKs in /system/app and /system/priv-app
|
|
r_dir_file(installd, system_file)
|
|
# Scan through APKs in /vendor/app
|
|
r_dir_file(installd, vendor_app_file)
|
|
# Scan through Runtime Resource Overlay APKs in /vendor/overlay
|
|
r_dir_file(installd, vendor_overlay_file)
|
|
# Get file context
|
|
allow installd file_contexts_file:file r_file_perms;
|
|
# Get seapp_context
|
|
allow installd seapp_contexts_file:file r_file_perms;
|
|
|
|
# Search /data/app-asec and stat files in it.
|
|
allow installd asec_image_file:dir search;
|
|
allow installd asec_image_file:file getattr;
|
|
|
|
# Create /data/user and /data/user/0 if necessary.
|
|
# Also required to initially create /data/data subdirectories
|
|
# and lib symlinks before the setfilecon call. May want to
|
|
# move symlink creation after setfilecon in installd.
|
|
allow installd system_data_file:dir create_dir_perms;
|
|
# Also, allow read for lnk_file so that we can process /data/user/0 links when
|
|
# optimizing application code.
|
|
allow installd system_data_file:lnk_file { create getattr read setattr unlink };
|
|
|
|
# Upgrade /data/media for multi-user if necessary.
|
|
allow installd media_rw_data_file:dir create_dir_perms;
|
|
allow installd media_rw_data_file:file { getattr unlink };
|
|
# restorecon new /data/media directory.
|
|
allow installd system_data_file:dir relabelfrom;
|
|
allow installd media_rw_data_file:dir relabelto;
|
|
|
|
# Delete /data/media files through sdcardfs, instead of going behind its back
|
|
allow installd tmpfs:dir r_dir_perms;
|
|
allow installd storage_file:dir search;
|
|
allow installd sdcardfs:dir { search open read write remove_name getattr rmdir };
|
|
allow installd sdcardfs:file { getattr unlink };
|
|
|
|
# Upgrade /data/misc/keychain for multi-user if necessary.
|
|
allow installd misc_user_data_file:dir create_dir_perms;
|
|
allow installd misc_user_data_file:file create_file_perms;
|
|
allow installd keychain_data_file:dir create_dir_perms;
|
|
allow installd keychain_data_file:file {r_file_perms unlink};
|
|
|
|
# Create /data/.layout_version.* file
|
|
allow installd install_data_file:file create_file_perms;
|
|
|
|
# Create files under /data/dalvik-cache.
|
|
allow installd dalvikcache_data_file:dir create_dir_perms;
|
|
allow installd dalvikcache_data_file:file create_file_perms;
|
|
allow installd dalvikcache_data_file:lnk_file getattr;
|
|
|
|
# Create files under /data/resource-cache.
|
|
allow installd resourcecache_data_file:dir rw_dir_perms;
|
|
allow installd resourcecache_data_file:file create_file_perms;
|
|
|
|
# Upgrade from unlabeled userdata.
|
|
# Just need enough to remove and/or relabel it.
|
|
allow installd unlabeled:dir { getattr search relabelfrom rw_dir_perms rmdir };
|
|
allow installd unlabeled:notdevfile_class_set { getattr relabelfrom rename unlink setattr };
|
|
# Read pkg.apk file for input during dexopt.
|
|
allow installd unlabeled:file r_file_perms;
|
|
|
|
# Upgrade from before system_app_data_file was used for system UID apps.
|
|
# Just need enough to relabel it and to unlink removed package files.
|
|
# Directory access covered by earlier rule above.
|
|
allow installd system_data_file:notdevfile_class_set { getattr relabelfrom unlink };
|
|
|
|
# Manage /data/data subdirectories, including initially labeling them
|
|
# upon creation via setfilecon or running restorecon_recursive,
|
|
# setting owner/mode, creating symlinks within them, and deleting them
|
|
# upon package uninstall.
|
|
# Types extracted from seapp_contexts type= fields.
|
|
allow installd {
|
|
system_app_data_file
|
|
bluetooth_data_file
|
|
nfc_data_file
|
|
radio_data_file
|
|
shell_data_file
|
|
app_data_file
|
|
privapp_data_file
|
|
}:dir { create_dir_perms relabelfrom relabelto };
|
|
|
|
allow installd {
|
|
system_app_data_file
|
|
bluetooth_data_file
|
|
nfc_data_file
|
|
radio_data_file
|
|
shell_data_file
|
|
app_data_file
|
|
privapp_data_file
|
|
}:notdevfile_class_set { create_file_perms relabelfrom relabelto };
|
|
|
|
# Similar for the files under /data/misc/profiles/
|
|
allow installd user_profile_data_file:dir create_dir_perms;
|
|
allow installd user_profile_data_file:file create_file_perms;
|
|
allow installd user_profile_data_file:dir rmdir;
|
|
allow installd user_profile_data_file:file unlink;
|
|
|
|
# Files created/updated by profman dumps.
|
|
allow installd profman_dump_data_file:dir { search add_name write };
|
|
allow installd profman_dump_data_file:file { create setattr open write };
|
|
|
|
# Create and use pty created by android_fork_execvp().
|
|
allow installd devpts:chr_file rw_file_perms;
|
|
|
|
# execute toybox for app relocation
|
|
allow installd toolbox_exec:file rx_file_perms;
|
|
|
|
# Allow installd to publish a binder service and make binder calls.
|
|
binder_use(installd)
|
|
add_service(installd, installd_service)
|
|
allow installd dumpstate:fifo_file { getattr write };
|
|
|
|
# Allow installd to call into the system server so it can check permissions.
|
|
binder_call(installd, system_server)
|
|
allow installd permission_service:service_manager find;
|
|
|
|
# Allow installd to read and write quotas
|
|
allow installd block_device:dir { search };
|
|
allow installd labeledfs:filesystem { quotaget quotamod };
|
|
|
|
# Allow installd to delete from /data/preloads when trimming data caches
|
|
# TODO b/34690396 Remove when time-based purge policy for preloads is implemented in system_server
|
|
allow installd preloads_data_file:file { r_file_perms unlink };
|
|
allow installd preloads_data_file:dir { r_dir_perms write remove_name rmdir };
|
|
allow installd preloads_media_file:file { r_file_perms unlink };
|
|
allow installd preloads_media_file:dir { r_dir_perms write remove_name rmdir };
|
|
|
|
###
|
|
### Neverallow rules
|
|
###
|
|
|
|
# only system_server, installd and dumpstate may interact with installd over binder
|
|
neverallow { domain -system_server -dumpstate -installd } installd_service:service_manager find;
|
|
neverallow { domain -system_server -dumpstate } installd:binder call;
|
|
neverallow installd { domain -system_server -servicemanager userdebug_or_eng(`-su') }:binder call;
|