f0f6ee2057
The recovery and update_binary need to access the /oem partition for
devices like sprout.
Bug: 19764039
Change-Id: I3647c5d72ed708cd797968669fa1116a3ba39542
(cherry picked from commit d245789c34)
118 lines
4.3 KiB
Text
118 lines
4.3 KiB
Text
# recovery console (used in recovery init.rc for /sbin/recovery)
|
|
|
|
# Declare the domain unconditionally so we can always reference it
|
|
# in neverallow rules.
|
|
type recovery, domain;
|
|
|
|
# But the allow rules are only included in the recovery policy.
|
|
# Otherwise recovery is only allowed the domain rules.
|
|
recovery_only(`
|
|
allow recovery self:capability { chown dac_override fowner fsetid setfcap setuid setgid sys_admin sys_tty_config };
|
|
|
|
# Set security contexts on files that are not known to the loaded policy.
|
|
allow recovery self:capability2 mac_admin;
|
|
|
|
# Run helpers from / or /system without changing domain.
|
|
allow recovery rootfs:file execute_no_trans;
|
|
allow recovery system_file:file execute_no_trans;
|
|
|
|
# Mount filesystems.
|
|
allow recovery rootfs:dir mounton;
|
|
allow recovery fs_type:filesystem ~relabelto;
|
|
allow recovery unlabeled:filesystem ~relabelto;
|
|
allow recovery contextmount_type:filesystem relabelto;
|
|
|
|
# Create and relabel files and directories under /system.
|
|
allow recovery exec_type:{ file lnk_file } { create_file_perms relabelfrom relabelto };
|
|
allow recovery system_file:{ file lnk_file } { create_file_perms relabelfrom relabelto };
|
|
allow recovery system_file:dir { create_dir_perms relabelfrom relabelto };
|
|
|
|
# We may be asked to set an SELinux label for a type not known to the
|
|
# currently loaded policy. Allow it.
|
|
allow recovery unlabeled:{ file lnk_file } { create_file_perms relabelfrom relabelto };
|
|
allow recovery unlabeled:dir { create_dir_perms relabelfrom relabelto };
|
|
|
|
# 0eb17d944704b3eb140bb9dded299d3be3aed77e in build/ added SELinux
|
|
# support to OTAs. However, that code has a bug. When an update occurs,
|
|
# some directories are inappropriately labeled as exec_type. This is
|
|
# only transient, and subsequent steps in the OTA script correct this
|
|
# mistake. New devices are moving to block based OTAs, so this is not
|
|
# worth fixing. b/15575013
|
|
allow recovery exec_type:dir { create_dir_perms relabelfrom relabelto };
|
|
|
|
# Write to /proc/sys/vm/drop_caches
|
|
allow recovery proc_drop_caches:file w_file_perms;
|
|
|
|
# Write to /sys/class/android_usb/android0/enable.
|
|
# TODO: create more specific label?
|
|
allow recovery sysfs:file w_file_perms;
|
|
|
|
access_kmsg(recovery)
|
|
|
|
# Access /dev/android_adb or /dev/usb-ffs/adb/ep0
|
|
allow recovery adb_device:chr_file rw_file_perms;
|
|
allow recovery functionfs:dir search;
|
|
allow recovery functionfs:file rw_file_perms;
|
|
|
|
# Required to e.g. wipe userdata/cache.
|
|
allow recovery device:dir r_dir_perms;
|
|
allow recovery block_device:dir r_dir_perms;
|
|
allow recovery dev_type:blk_file rw_file_perms;
|
|
|
|
# GUI
|
|
allow recovery self:process execmem;
|
|
allow recovery ashmem_device:chr_file execute;
|
|
allow recovery graphics_device:chr_file rw_file_perms;
|
|
allow recovery graphics_device:dir r_dir_perms;
|
|
allow recovery input_device:dir r_dir_perms;
|
|
allow recovery input_device:chr_file r_file_perms;
|
|
allow recovery tty_device:chr_file rw_file_perms;
|
|
|
|
# Create /tmp/recovery.log and execute /tmp/update_binary.
|
|
allow recovery tmpfs:file { create_file_perms x_file_perms };
|
|
allow recovery tmpfs:dir create_dir_perms;
|
|
|
|
# Manage files on /cache
|
|
allow recovery cache_file:dir create_dir_perms;
|
|
allow recovery cache_file:file create_file_perms;
|
|
|
|
# Read files on /oem.
|
|
r_dir_file(recovery, oemfs);
|
|
|
|
# Reboot the device
|
|
set_prop(recovery, powerctl_prop)
|
|
|
|
# Start/stop adbd via ctl.start adbd
|
|
set_prop(recovery, ctl_default_prop)
|
|
|
|
# Use setfscreatecon() to label files for OTA updates.
|
|
allow recovery self:process setfscreate;
|
|
|
|
# Allow recovery to create a fuse filesystem, and read files from it.
|
|
allow recovery fuse_device:chr_file rw_file_perms;
|
|
allow recovery fuse:dir r_dir_perms;
|
|
allow recovery fuse:file r_file_perms;
|
|
|
|
wakelock_use(recovery)
|
|
|
|
# This line seems suspect, as it should not really need to
|
|
# set scheduling parameters for a kernel domain task.
|
|
allow recovery kernel:process setsched;
|
|
')
|
|
|
|
###
|
|
### neverallow rules
|
|
###
|
|
|
|
# Recovery should never touch /data.
|
|
#
|
|
# In particular, if /data is encrypted, it is not accessible
|
|
# to recovery anyway.
|
|
#
|
|
# For now, we only enforce write/execute restrictions, as domain.te
|
|
# contains a number of read-only rules that apply to all
|
|
# domains, including recovery.
|
|
#
|
|
# TODO: tighten this up further.
|
|
neverallow recovery data_file_type:file { no_w_file_perms no_x_file_perms };
|
|
neverallow recovery data_file_type:dir no_w_dir_perms;
|