xref: /aosp_15_r20/system/sepolicy/prebuilts/api/202404/public/installd.te (revision e4a36f4174b17bbab9dc043f4a65dc8d87377290)
1# installer daemon
2type installd, domain;
3type installd_exec, system_file_type, exec_type, file_type;
4typeattribute installd mlstrustedsubject;
5allow installd self:global_capability_class_set { chown dac_override dac_read_search fowner fsetid setgid setuid sys_admin kill };
6
7# Allow labeling of files under /data/app/com.example/oat/
8allow installd dalvikcache_data_file:dir relabelto;
9allow installd dalvikcache_data_file:file { relabelto link };
10
11# Allow movement of APK files between volumes
12allow installd apk_data_file:dir { create_dir_perms relabelfrom };
13allow installd apk_data_file:file { create_file_perms relabelfrom link };
14allow installd apk_data_file:lnk_file { create r_file_perms unlink };
15
16allow installd asec_apk_file:file r_file_perms;
17allow installd apk_tmp_file:file { r_file_perms unlink };
18allow installd apk_tmp_file:dir { relabelfrom create_dir_perms };
19allow installd oemfs:dir r_dir_perms;
20allow installd oemfs:file r_file_perms;
21allow installd cgroup:dir create_dir_perms;
22allow installd cgroup_v2:dir create_dir_perms;
23allow installd mnt_expand_file:dir { search getattr };
24# Check validity of SELinux context before use.
25selinux_check_context(installd)
26
27r_dir_file(installd, rootfs)
28# Scan through APKs in /system/app and /system/priv-app
29r_dir_file(installd, system_file)
30# Scan through APKs in /vendor/app
31r_dir_file(installd, vendor_app_file)
32# Scan through JARs in /vendor/framework
33r_dir_file(installd, vendor_framework_file)
34# Scan through Runtime Resource Overlay APKs in /vendor/overlay
35r_dir_file(installd, vendor_overlay_file)
36# Vendor overlay can be found in vendor apex
37allow installd vendor_apex_metadata_file:dir { getattr search };
38# Get file context
39allow installd file_contexts_file:file r_file_perms;
40# Get seapp_context
41allow installd seapp_contexts_file:file r_file_perms;
42
43# Search /data/app-asec and stat files in it.
44allow installd asec_image_file:dir search;
45allow installd asec_image_file:file getattr;
46
47# Required to initially create subdirectories of /data/user/$userId
48# and lib symlinks before the setfilecon call.  May want to
49# move symlink creation after setfilecon in installd.
50allow installd system_data_file:dir create_dir_perms;
51# Also, allow read for lnk_file so that we can process symlinks within
52# /data/user/$userId when optimizing application code.
53allow installd system_data_file:lnk_file { create getattr read setattr unlink };
54
55# Manage lower filesystem via pass_through mounts
56allow installd mnt_pass_through_file:dir r_dir_perms;
57
58# Upgrade /data/media for multi-user if necessary.
59allow installd media_rw_data_file:dir create_dir_perms;
60allow installd media_rw_data_file:file { getattr unlink };
61# restorecon new /data/media directory.
62allow installd system_data_file:dir relabelfrom;
63allow installd media_rw_data_file:dir relabelto;
64
65# Delete /data/media files through sdcardfs, instead of going behind its back
66allow installd media_userdir_file:dir r_dir_perms;
67allow installd tmpfs:dir r_dir_perms;
68allow installd storage_file:dir search;
69allow installd { sdcard_type fuse }:dir { search open read write remove_name getattr rmdir };
70allow installd { sdcard_type fuse }:file { getattr unlink };
71
72# Create app's mirror data directory in /data_mirror, and bind mount the real directory to it
73allow installd mirror_data_file:dir { create_dir_perms mounton };
74
75# Upgrade /data/misc/keychain for multi-user if necessary.
76allow installd system_userdir_file:dir r_dir_perms;
77allow installd misc_user_data_file:dir create_dir_perms;
78allow installd misc_user_data_file:file create_file_perms;
79allow installd keychain_data_file:dir create_dir_perms;
80allow installd keychain_data_file:file {r_file_perms unlink};
81
82# Create /data/misc/installd/layout_version.* file
83allow installd install_data_file:file create_file_perms;
84allow installd install_data_file:dir rw_dir_perms;
85
86# Create files under /data/dalvik-cache.
87allow installd dalvikcache_data_file:dir create_dir_perms;
88allow installd dalvikcache_data_file:file create_file_perms;
89allow installd dalvikcache_data_file:lnk_file getattr;
90
91# Create files under /data/resource-cache.
92allow installd resourcecache_data_file:dir rw_dir_perms;
93allow installd resourcecache_data_file:file create_file_perms;
94
95# Upgrade from unlabeled userdata.
96# Just need enough to remove and/or relabel it.
97allow installd unlabeled:dir { getattr search relabelfrom rw_dir_perms rmdir };
98allow installd unlabeled:notdevfile_class_set { getattr relabelfrom rename unlink setattr };
99# Read pkg.apk file for input during dexopt.
100allow installd unlabeled:file r_file_perms;
101
102# Upgrade from before system_app_data_file was used for system UID apps.
103# Just need enough to relabel it and to unlink removed package files.
104# Directory access covered by earlier rule above.
105allow installd system_data_file:notdevfile_class_set { getattr relabelfrom unlink };
106
107# Manage /data/data subdirectories, including initially labeling them
108# upon creation via setfilecon or running restorecon_recursive,
109# setting owner/mode, creating symlinks within them, and deleting them
110# upon package uninstall.
111allow installd app_data_file_type:dir { create_dir_perms relabelfrom relabelto };
112allow installd app_data_file_type:notdevfile_class_set { create_file_perms relabelfrom relabelto };
113
114# Allow setting extended attributes (for project quota IDs) on dirs and files
115# and to enable project ID inheritance through FS_IOC_SETFLAGS
116# Added install_data_file to be able to create file under /data/misc/installd/ioctl_check
117allowxperm installd { app_data_file_type system_data_file install_data_file}:{ dir file } ioctl {
118  FS_IOC_FSGETXATTR
119  FS_IOC_FSSETXATTR
120  FS_IOC_GETFLAGS
121  FS_IOC_SETFLAGS
122};
123
124# Similar for the files under /data/misc/profiles/
125allow installd user_profile_root_file:dir { create_dir_perms relabelfrom };
126allow installd user_profile_data_file:dir { create_dir_perms relabelto };
127allow installd user_profile_data_file:file create_file_perms;
128allow installd user_profile_data_file:file unlink;
129
130# Allow zygote to unmount mirror directories
131allow installd labeledfs:filesystem unmount;
132
133# Files created/updated by profman dumps.
134allow installd profman_dump_data_file:dir { search add_name write };
135allow installd profman_dump_data_file:file { create setattr open write };
136
137# Create and use pty created by android_fork_execvp().
138allow installd devpts:chr_file rw_file_perms;
139
140# execute toybox for app relocation
141allow installd toolbox_exec:file rx_file_perms;
142
143# Allow installd to publish a binder service and make binder calls.
144binder_use(installd)
145add_service(installd, installd_service)
146allow installd dumpstate:fifo_file  { getattr write };
147
148# Allow installd to call into the system server so it can check permissions.
149binder_call(installd, system_server)
150allow installd permission_service:service_manager find;
151
152# Allow installd to read and write quotas
153allow installd block_device:dir { search };
154allow installd labeledfs:filesystem { quotaget quotamod };
155
156# Allow installd to delete from /data/preloads when trimming data caches
157# TODO b/34690396 Remove when time-based purge policy for preloads is implemented in system_server
158allow installd preloads_data_file:file { r_file_perms unlink };
159allow installd preloads_data_file:dir { r_dir_perms write remove_name rmdir };
160allow installd preloads_media_file:file { r_file_perms unlink };
161allow installd preloads_media_file:dir { r_dir_perms write remove_name rmdir };
162
163# Allow installd to read /proc/filesystems
164allow installd proc_filesystems:file r_file_perms;
165
166#add for move app to sd card
167get_prop(installd, storage_config_prop)
168
169# Allow installd to access apps installed on the Incremental File System
170# Accessing files on the Incremental File System uses fds opened in the context of vold.
171allow installd vold:fd use;
172
173###
174### Neverallow rules
175###
176
177# only system_server, installd, dumpstate, and servicemanager may interact with installd over binder
178neverallow { domain -system_server -dumpstate -installd } installd_service:service_manager find;
179neverallow { domain -system_server -dumpstate -servicemanager } installd:binder call;
180neverallow installd {
181    domain
182    -system_server
183    -servicemanager
184    userdebug_or_eng(`-su')
185}:binder call;
186