1# volume manager 2type vold, domain; 3type vold_exec, exec_type, file_type; 4 5# Read already opened /cache files. 6allow vold cache_file:dir r_dir_perms; 7allow vold cache_file:file { getattr read }; 8allow vold cache_file:lnk_file r_file_perms; 9 10# Read access to pseudo filesystems. 11r_dir_file(vold, proc) 12r_dir_file(vold, proc_net) 13r_dir_file(vold, sysfs_type) 14# XXX Label sysfs files with a specific type? 15allow vold sysfs:file w_file_perms; 16allow vold sysfs_usb:file w_file_perms; 17allow vold sysfs_zram_uevent:file w_file_perms; 18 19r_dir_file(vold, rootfs) 20allow vold proc_meminfo:file r_file_perms; 21 22#Get file contexts 23allow vold file_contexts_file:file r_file_perms; 24 25# Allow us to jump into execution domains of above tools 26allow vold self:process setexec; 27 28# For sgdisk launched through popen() 29allow vold shell_exec:file rx_file_perms; 30 31# For formatting adoptable storage devices 32allow vold e2fs_exec:file rx_file_perms; 33 34typeattribute vold mlstrustedsubject; 35allow vold self:process setfscreate; 36allow vold system_file:file x_file_perms; 37not_full_treble(`allow vold vendor_file:file x_file_perms;') 38allow vold block_device:dir create_dir_perms; 39allow vold device:dir write; 40allow vold devpts:chr_file rw_file_perms; 41allow vold rootfs:dir mounton; 42allow vold sdcard_type:dir mounton; # TODO: deprecated in M 43allow vold sdcard_type:filesystem { mount remount unmount }; # TODO: deprecated in M 44allow vold sdcard_type:dir create_dir_perms; # TODO: deprecated in M 45allow vold sdcard_type:file create_file_perms; # TODO: deprecated in M 46 47# Manage locations where storage is mounted 48allow vold { mnt_media_rw_file storage_file sdcard_type }:dir create_dir_perms; 49allow vold { mnt_media_rw_file storage_file sdcard_type }:file create_file_perms; 50 51# Access to storage that backs emulated FUSE daemons for migration optimization 52allow vold media_rw_data_file:dir create_dir_perms; 53allow vold media_rw_data_file:file create_file_perms; 54 55# Allow mounting of storage devices 56allow vold { mnt_media_rw_stub_file storage_stub_file }:dir { mounton create rmdir getattr setattr }; 57 58# Manage per-user primary symlinks 59allow vold mnt_user_file:dir create_dir_perms; 60allow vold mnt_user_file:lnk_file create_file_perms; 61 62# Allow to create and mount expanded storage 63allow vold mnt_expand_file:dir { create_dir_perms mounton }; 64allow vold apk_data_file:dir { create getattr setattr }; 65allow vold shell_data_file:dir { create getattr setattr }; 66 67allow vold tmpfs:filesystem { mount unmount }; 68allow vold tmpfs:dir create_dir_perms; 69allow vold tmpfs:dir mounton; 70allow vold self:capability { net_admin dac_override mknod sys_admin chown fowner fsetid }; 71allow vold self:netlink_kobject_uevent_socket create_socket_perms_no_ioctl; 72allow vold app_data_file:dir search; 73allow vold app_data_file:file rw_file_perms; 74allow vold loop_control_device:chr_file rw_file_perms; 75allow vold loop_device:blk_file { create setattr unlink rw_file_perms }; 76allow vold vold_device:blk_file { create setattr unlink rw_file_perms }; 77allow vold dm_device:chr_file rw_file_perms; 78allow vold dm_device:blk_file rw_file_perms; 79# For vold Process::killProcessesWithOpenFiles function. 80allow vold domain:dir r_dir_perms; 81allow vold domain:{ file lnk_file } r_file_perms; 82allow vold domain:process { signal sigkill }; 83allow vold self:capability { sys_ptrace kill }; 84 85# XXX Label sysfs files with a specific type? 86allow vold sysfs:file rw_file_perms; 87 88allow vold kmsg_device:chr_file rw_file_perms; 89 90# Run fsck in the fsck domain. 91allow vold fsck_exec:file { r_file_perms execute }; 92 93# Log fsck results 94allow vold fscklogs:dir rw_dir_perms; 95allow vold fscklogs:file create_file_perms; 96 97# 98# Rules to support encrypted fs support. 99# 100 101# Unmount and mount the fs. 102allow vold labeledfs:filesystem { mount unmount }; 103 104# Access /efs/userdata_footer. 105# XXX Split into a separate type? 106allow vold efs_file:file rw_file_perms; 107 108# Create and mount on /data/tmp_mnt and management of expansion mounts 109allow vold system_data_file:dir { create rw_dir_perms mounton setattr rmdir }; 110 111# Set scheduling policy of kernel processes 112allow vold kernel:process setsched; 113 114# Property Service 115set_prop(vold, vold_prop) 116set_prop(vold, powerctl_prop) 117set_prop(vold, ctl_fuse_prop) 118set_prop(vold, restorecon_prop) 119 120# ASEC 121allow vold asec_image_file:file create_file_perms; 122allow vold asec_image_file:dir rw_dir_perms; 123allow vold asec_apk_file:dir { create_dir_perms mounton relabelfrom relabelto }; 124allow vold asec_public_file:dir { relabelto setattr }; 125allow vold asec_apk_file:file { r_file_perms setattr relabelfrom relabelto }; 126allow vold asec_public_file:file { relabelto setattr }; 127# restorecon files in asec containers created on 4.2 or earlier. 128allow vold unlabeled:dir { r_dir_perms setattr relabelfrom }; 129allow vold unlabeled:file { r_file_perms setattr relabelfrom }; 130 131# Handle wake locks (used for device encryption) 132wakelock_use(vold) 133 134# talk to batteryservice 135binder_use(vold) 136binder_call(vold, healthd) 137 138# talk to keymaster 139hal_client_domain(vold, hal_keymaster) 140 141# Access userdata block device. 142allow vold userdata_block_device:blk_file rw_file_perms; 143 144# Access metadata block device used for encryption meta-data. 145allow vold metadata_block_device:blk_file rw_file_perms; 146 147# Allow vold to manipulate /data/unencrypted 148allow vold unencrypted_data_file:{ file } create_file_perms; 149allow vold unencrypted_data_file:dir create_dir_perms; 150 151# Write to /proc/sys/vm/drop_caches 152allow vold proc_drop_caches:file w_file_perms; 153 154# Give vold a place where only vold can store files; everyone else is off limits 155allow vold vold_data_file:dir create_dir_perms; 156allow vold vold_data_file:file create_file_perms; 157 158# linux keyring configuration 159allow vold init:key { write search setattr }; 160allow vold vold:key { write search setattr }; 161 162# vold temporarily changes its priority when running benchmarks 163allow vold self:capability sys_nice; 164 165# vold needs to chroot into app namespaces to remount when runtime permissions change 166allow vold self:capability sys_chroot; 167allow vold storage_file:dir mounton; 168 169# For AppFuse. 170allow vold fuse_device:chr_file rw_file_perms; 171allow vold fuse:filesystem { relabelfrom }; 172allow vold app_fusefs:filesystem { relabelfrom relabelto }; 173allow vold app_fusefs:filesystem { mount unmount }; 174 175# MoveTask.cpp executes cp and rm 176allow vold toolbox_exec:file rx_file_perms; 177 178# Prepare profile dir for users. 179allow vold user_profile_data_file:dir create_dir_perms; 180 181# Raw writes to misc block device 182allow vold misc_block_device:blk_file w_file_perms; 183 184neverallow { domain -vold } vold_data_file:dir ~{ open create read getattr setattr search relabelto ioctl }; 185neverallow { domain -vold -kernel } vold_data_file:notdevfile_class_set ~{ relabelto getattr }; 186neverallow { domain -vold -init } vold_data_file:dir *; 187neverallow { domain -vold -init -kernel } vold_data_file:notdevfile_class_set *; 188neverallow { domain -vold -init } restorecon_prop:property_service set; 189 190neverallow vold fsck_exec:file execute_no_trans; 191