blob: 3a38ba539405979c9198137cb2b3a476e41e2a78 [file] [log] [blame]
# volume manager
type vold, domain;
type vold_exec, exec_type, file_type, system_file_type;
# 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;
r_dir_file(vold, { sysfs_type -sysfs_batteryinfo })
# XXX Label sysfs files with a specific type?
allow vold {
sysfs # writing to /sys/*/uevent during coldboot.
sysfs_loop # writing to /sys/block/loop*/uevent during coldboot.
}:file w_file_perms;
r_dir_file(vold, rootfs)
r_dir_file(vold, metadata_file)
allow vold {
proc # b/67049235 processes /proc/<pid>/* files are mislabeled.
}:file r_file_perms;
#Get file contexts
allow vold file_contexts_file:file r_file_perms;
# Allow us to jump into execution domains of above tools
allow vold self:process setexec;
# For formatting adoptable storage devices
allow vold e2fs_exec:file rx_file_perms;
# Run fstrim on mounted partitions
# allowxperm still requires the ioctl permission for the individual type
allowxperm vold { fs_type file_type }:dir ioctl FITRIM;
# Get encryption policy for dirs in /data
allowxperm vold data_file_type:dir ioctl {
# Find the location on the raw block device where the
# crypto key is stored so it can be destroyed
allowxperm vold vold_data_file:file ioctl {
typeattribute vold mlstrustedsubject;
allow vold self:process setfscreate;
allow vold system_file:file x_file_perms;
not_full_treble(`allow vold vendor_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;
# Allow mounting of storage devices
allow vold { mnt_media_rw_stub_file storage_stub_file }:dir { mounton create rmdir getattr setattr };
# Manage per-user primary symlinks
allow vold mnt_user_file:dir { create_dir_perms mounton };
allow vold mnt_user_file:lnk_file create_file_perms;
allow vold mnt_user_file: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:global_capability_class_set { net_admin dac_override dac_read_search mknod sys_admin chown fowner fsetid };
allow vold self:netlink_kobject_uevent_socket create_socket_perms_no_ioctl;
allow vold loop_control_device:chr_file rw_file_perms;
allow vold loop_device:blk_file { create setattr unlink rw_file_perms };
allowxperm vold loop_device:blk_file ioctl {
allow vold vold_device:blk_file { create setattr unlink rw_file_perms };
allowxperm vold vold_device:blk_file ioctl { BLKDISCARD BLKGETSIZE };
allow vold dm_device:chr_file rw_file_perms;
allow vold dm_device:blk_file rw_file_perms;
allowxperm vold dm_device:blk_file ioctl BLKSECDISCARD;
# 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:global_capability_class_set { sys_ptrace kill };
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 };
allow vold system_data_file:lnk_file getattr;
# Vold create users in /data/vendor_{ce,de}/[0-9]+
allow vold vendor_data_file:dir create_dir_perms;
# for secdiscard
allow vold system_data_file:file read;
# Set scheduling policy of kernel processes
allow vold kernel:process setsched;
# Property Service
set_prop(vold, vold_prop)
set_prop(vold, exported_vold_prop)
set_prop(vold, exported2_vold_prop)
set_prop(vold, powerctl_prop)
set_prop(vold, ctl_fuse_prop)
set_prop(vold, restorecon_prop)
allow vold asec_image_file:file create_file_perms;
allow vold asec_image_file:dir rw_dir_perms;
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)
# Allow vold to publish a binder service and make binder calls.
add_service(vold, vold_service)
# Allow vold to call into the system server so it can check permissions.
binder_call(vold, system_server)
allow vold permission_service:service_manager find;
# talk to batteryservice
binder_call(vold, healthd)
# talk to keymaster
hal_client_domain(vold, hal_keymaster)
# talk to health storage HAL
hal_client_domain(vold, hal_health_storage)
# talk to bootloader HAL
full_treble_only(`hal_client_domain(vold, hal_bootctl)')
# Access userdata block device.
allow vold userdata_block_device:blk_file rw_file_perms;
allowxperm vold userdata_block_device:blk_file ioctl BLKSECDISCARD;
# 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;
# And a similar place in the metadata partition
allow vold vold_metadata_file:dir create_dir_perms;
allow vold vold_metadata_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:global_capability_class_set sys_nice;
# vold needs to chroot into app namespaces to remount when runtime permissions change
allow vold self:global_capability_class_set 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 };
allow vold app_fuse_file:dir rw_dir_perms;
allow vold app_fuse_file:file { read write open getattr append };
# MoveTask.cpp executes cp and rm
allow vold toolbox_exec:file rx_file_perms;
# Prepare profile dir for users.
allow vold user_profile_data_file:dir create_dir_perms;
# Raw writes to misc block device
allow vold misc_block_device:blk_file w_file_perms;
# vold might need to search or mount /mnt/vendor/*
allow vold mnt_vendor_file:dir search;
dontaudit vold self:global_capability_class_set sys_resource;
# vold needs to know whether we're running a GSI.
allow vold gsi_metadata_file:dir r_dir_perms;
allow vold gsi_metadata_file:file r_file_perms;
neverallow {
} vold_data_file:dir ~{ open create read getattr setattr search relabelfrom relabelto ioctl };
neverallow {
} vold_data_file:dir *;
neverallow {
} vold_metadata_file:dir *;
neverallow {
} vold_data_file:notdevfile_class_set ~{ relabelto getattr };
neverallow {
} vold_metadata_file:notdevfile_class_set ~{ relabelto getattr };
neverallow {
} { vold_data_file vold_metadata_file }:notdevfile_class_set *;
neverallow { domain -vold -init } restorecon_prop:property_service set;
neverallow {
} vold_service:service_manager find;
neverallow vold {
}:binder call;
neverallow vold fsck_exec:file execute_no_trans;
neverallow { domain -init } vold:process { transition dyntransition };
neverallow vold *:process ptrace;
neverallow vold *:rawip_socket *;