e178ac5a71
The labels for filesystem and files are assigned by vold with using context= mount option. Change-Id: I8a9d701a46a333093a27107fc3c52b17a2af1a94
194 lines
7 KiB
Text
194 lines
7 KiB
Text
# volume manager
|
|
type vold, domain, domain_deprecated;
|
|
type vold_exec, exec_type, file_type;
|
|
|
|
init_daemon_domain(vold)
|
|
|
|
# Switch to more restrictive domains when executing common tools
|
|
domain_auto_trans(vold, sgdisk_exec, sgdisk);
|
|
domain_auto_trans(vold, sdcardd_exec, sdcardd);
|
|
|
|
# Read already opened /cache files.
|
|
allow vold cache_file:dir r_dir_perms;
|
|
allow vold cache_file:file { getattr read };
|
|
allow vold cache_file:lnk_file r_file_perms;
|
|
|
|
# Read access to pseudo filesystems.
|
|
r_dir_file(vold, proc)
|
|
r_dir_file(vold, proc_net)
|
|
r_dir_file(vold, sysfs)
|
|
r_dir_file(vold, rootfs)
|
|
|
|
# For a handful of probing tools, we choose an even more restrictive
|
|
# domain when working with untrusted block devices
|
|
domain_trans(vold, shell_exec, blkid);
|
|
domain_trans(vold, shell_exec, blkid_untrusted);
|
|
domain_trans(vold, fsck_exec, fsck);
|
|
domain_trans(vold, fsck_exec, fsck_untrusted);
|
|
|
|
# Allow us to jump into execution domains of above tools
|
|
allow vold self:process setexec;
|
|
|
|
# For sgdisk launched through popen()
|
|
allow vold shell_exec:file rx_file_perms;
|
|
|
|
typeattribute vold mlstrustedsubject;
|
|
allow vold self:process setfscreate;
|
|
allow vold system_file:file x_file_perms;
|
|
allow vold block_device:dir create_dir_perms;
|
|
allow vold device:dir write;
|
|
allow vold devpts:chr_file rw_file_perms;
|
|
allow vold rootfs:dir mounton;
|
|
allow vold sdcard_type:dir mounton; # TODO: deprecated in M
|
|
allow vold sdcard_type:filesystem { mount remount unmount }; # TODO: deprecated in M
|
|
allow vold sdcard_type:dir create_dir_perms; # TODO: deprecated in M
|
|
allow vold sdcard_type:file create_file_perms; # TODO: deprecated in M
|
|
|
|
# Manage locations where storage is mounted
|
|
allow vold { mnt_media_rw_file storage_file sdcard_type }:dir create_dir_perms;
|
|
allow vold { mnt_media_rw_file storage_file sdcard_type }:file create_file_perms;
|
|
|
|
# Access to storage that backs emulated FUSE daemons for migration optimization
|
|
allow vold media_rw_data_file:dir create_dir_perms;
|
|
allow vold media_rw_data_file:file create_file_perms;
|
|
|
|
# Newly created storage dirs are always treated as mount stubs to prevent us
|
|
# from accidentally writing when the mount point isn't present.
|
|
type_transition vold storage_file:dir storage_stub_file;
|
|
type_transition vold mnt_media_rw_file:dir mnt_media_rw_stub_file;
|
|
|
|
# Allow mounting of storage devices
|
|
allow vold { mnt_media_rw_stub_file storage_stub_file }:dir { mounton create rmdir getattr setattr };
|
|
allow vold sdcard_type:filesystem { mount unmount remount };
|
|
|
|
# Manage per-user primary symlinks
|
|
allow vold mnt_user_file:dir create_dir_perms;
|
|
allow vold mnt_user_file:lnk_file create_file_perms;
|
|
|
|
# Allow to create and mount expanded storage
|
|
allow vold mnt_expand_file:dir { create_dir_perms mounton };
|
|
allow vold apk_data_file:dir { create getattr setattr };
|
|
allow vold shell_data_file:dir { create getattr setattr };
|
|
|
|
allow vold tmpfs:filesystem { mount unmount };
|
|
allow vold tmpfs:dir create_dir_perms;
|
|
allow vold tmpfs:dir mounton;
|
|
allow vold self:capability { net_admin dac_override mknod sys_admin chown fowner fsetid };
|
|
allow vold self:netlink_kobject_uevent_socket create_socket_perms;
|
|
allow vold app_data_file:dir search;
|
|
allow vold app_data_file:file rw_file_perms;
|
|
allow vold loop_device:blk_file create_file_perms;
|
|
allow vold vold_device:blk_file create_file_perms;
|
|
allow vold dm_device:chr_file rw_file_perms;
|
|
allow vold dm_device:blk_file rw_file_perms;
|
|
# For vold Process::killProcessesWithOpenFiles function.
|
|
allow vold domain:dir r_dir_perms;
|
|
allow vold domain:{ file lnk_file } r_file_perms;
|
|
allow vold domain:process { signal sigkill };
|
|
allow vold self:capability { sys_ptrace kill };
|
|
|
|
# XXX Label sysfs files with a specific type?
|
|
allow vold sysfs:file rw_file_perms;
|
|
|
|
allow vold kmsg_device:chr_file rw_file_perms;
|
|
|
|
# Run fsck in the fsck domain.
|
|
allow vold fsck_exec:file { r_file_perms execute };
|
|
|
|
# Log fsck results
|
|
allow vold fscklogs:dir rw_dir_perms;
|
|
allow vold fscklogs:file create_file_perms;
|
|
|
|
#
|
|
# Rules to support encrypted fs support.
|
|
#
|
|
|
|
# Unmount and mount the fs.
|
|
allow vold labeledfs:filesystem { mount unmount remount };
|
|
|
|
# Access /efs/userdata_footer.
|
|
# XXX Split into a separate type?
|
|
allow vold efs_file:file rw_file_perms;
|
|
|
|
# Create and mount on /data/tmp_mnt and management of expansion mounts
|
|
allow vold system_data_file:dir { create rw_dir_perms mounton setattr rmdir };
|
|
|
|
# Set scheduling policy of kernel processes
|
|
allow vold kernel:process setsched;
|
|
|
|
# Property Service
|
|
set_prop(vold, vold_prop)
|
|
set_prop(vold, powerctl_prop)
|
|
set_prop(vold, ctl_fuse_prop)
|
|
set_prop(vold, restorecon_prop)
|
|
|
|
# ASEC
|
|
allow vold asec_image_file:file create_file_perms;
|
|
allow vold asec_image_file:dir rw_dir_perms;
|
|
security_access_policy(vold)
|
|
allow vold asec_apk_file:dir { create_dir_perms mounton relabelfrom relabelto };
|
|
allow vold asec_public_file:dir { relabelto setattr };
|
|
allow vold asec_apk_file:file { r_file_perms setattr relabelfrom relabelto };
|
|
allow vold asec_public_file:file { relabelto setattr };
|
|
# restorecon files in asec containers created on 4.2 or earlier.
|
|
allow vold unlabeled:dir { r_dir_perms setattr relabelfrom };
|
|
allow vold unlabeled:file { r_file_perms setattr relabelfrom };
|
|
|
|
# Handle wake locks (used for device encryption)
|
|
wakelock_use(vold)
|
|
|
|
# talk to batteryservice
|
|
binder_use(vold)
|
|
binder_call(vold, healthd)
|
|
|
|
# talk to keymaster
|
|
allow vold tee_device:chr_file rw_file_perms;
|
|
|
|
# Access userdata block device.
|
|
allow vold userdata_block_device:blk_file rw_file_perms;
|
|
|
|
# Access metadata block device used for encryption meta-data.
|
|
allow vold metadata_block_device:blk_file rw_file_perms;
|
|
|
|
# Allow vold to manipulate /data/unencrypted
|
|
allow vold unencrypted_data_file:{ file } create_file_perms;
|
|
allow vold unencrypted_data_file:dir create_dir_perms;
|
|
|
|
# Write to /proc/sys/vm/drop_caches
|
|
allow vold proc_drop_caches:file w_file_perms;
|
|
|
|
# Give vold a place where only vold can store files; everyone else is off limits
|
|
allow vold vold_data_file:dir create_dir_perms;
|
|
allow vold vold_data_file:file create_file_perms;
|
|
|
|
# linux keyring configuration
|
|
allow vold init:key { write search setattr };
|
|
allow vold vold:key { write search setattr };
|
|
|
|
# vold temporarily changes its priority when running benchmarks
|
|
allow vold self:capability sys_nice;
|
|
|
|
# vold needs to chroot into app namespaces to remount when runtime permissions change
|
|
allow vold self:capability sys_chroot;
|
|
allow vold storage_file:dir mounton;
|
|
|
|
# For AppFuse.
|
|
allow vold fuse_device:chr_file rw_file_perms;
|
|
allow vold fuse:filesystem { relabelfrom };
|
|
allow vold app_fusefs:filesystem { relabelfrom relabelto };
|
|
allow vold app_fusefs:filesystem { mount unmount };
|
|
|
|
# coldboot of /sys/block
|
|
allow vold sysfs_zram:dir r_dir_perms;
|
|
allow vold sysfs_zram_uevent:file rw_file_perms;
|
|
|
|
# MoveTask.cpp executes cp and rm
|
|
allow vold toolbox_exec:file rx_file_perms;
|
|
|
|
neverallow { domain -vold } vold_data_file:dir ~{ open create read getattr setattr search relabelto ioctl };
|
|
neverallow { domain -vold } vold_data_file:notdevfile_class_set ~{ relabelto getattr };
|
|
neverallow { domain -vold -init } vold_data_file:dir *;
|
|
neverallow { domain -vold -init } vold_data_file:notdevfile_class_set *;
|
|
neverallow { domain -vold -init } restorecon_prop:property_service set;
|
|
|
|
neverallow vold fsck_exec:file execute_no_trans;
|