1 # recovery console (used in recovery init.rc for /sbin/recovery) 2 3 # Declare the domain unconditionally so we can always reference it 4 # in neverallow rules. 5 type recovery, domain; 6 7 # But the allow rules are only included in the recovery policy. 8 # Otherwise recovery is only allowed the domain rules. 9 recovery_only(` 10 allow recovery self:capability { chown dac_override fowner fsetid setfcap setuid setgid sys_admin sys_tty_config }; 11 12 # Set security contexts on files that are not known to the loaded policy. 13 allow recovery self:capability2 mac_admin; 14 15 # Run helpers from / or /system without changing domain. 16 allow recovery rootfs:file execute_no_trans; 17 allow recovery system_file:file execute_no_trans; 18 19 # Mount filesystems. 20 allow recovery rootfs:dir mounton; 21 allow recovery fs_type:filesystem ~relabelto; 22 allow recovery unlabeled:filesystem ~relabelto; 23 allow recovery contextmount_type:filesystem relabelto; 24 25 # Create and relabel files and directories under /system. 26 allow recovery exec_type:{ file lnk_file } { create_file_perms relabelfrom relabelto }; 27 allow recovery system_file:{ file lnk_file } { create_file_perms relabelfrom relabelto }; 28 allow recovery system_file:dir { create_dir_perms relabelfrom relabelto }; 29 30 # We may be asked to set an SELinux label for a type not known to the 31 # currently loaded policy. Allow it. 32 allow recovery unlabeled:{ file lnk_file } { create_file_perms relabelfrom relabelto }; 33 allow recovery unlabeled:dir { create_dir_perms relabelfrom relabelto }; 34 35 # 0eb17d944704b3eb140bb9dded299d3be3aed77e in build/ added SELinux 36 # support to OTAs. However, that code has a bug. When an update occurs, 37 # some directories are inappropriately labeled as exec_type. This is 38 # only transient, and subsequent steps in the OTA script correct this 39 # mistake. 40 # Allow this behavior for now until we can fix the underlying bug. 41 # b/15575013 42 allow recovery exec_type:dir { create_dir_perms relabelfrom relabelto }; 43 auditallow recovery exec_type:dir { create_dir_perms relabelfrom relabelto }; 44 45 # Write to /proc/sys/vm/drop_caches 46 # TODO: create more specific label? 47 allow recovery proc:file w_file_perms; 48 49 # Write to /sys/class/android_usb/android0/enable. 50 # TODO: create more specific label? 51 allow recovery sysfs:file w_file_perms; 52 53 # Access /dev/android_adb or /dev/usb-ffs/adb/ep0 54 allow recovery adb_device:chr_file rw_file_perms; 55 allow recovery functionfs:dir search; 56 allow recovery functionfs:file rw_file_perms; 57 58 # Required to e.g. wipe userdata/cache. 59 allow recovery device:dir r_dir_perms; 60 allow recovery block_device:dir r_dir_perms; 61 allow recovery dev_type:blk_file rw_file_perms; 62 63 # GUI 64 allow recovery self:process execmem; 65 allow recovery ashmem_device:chr_file execute; 66 allow recovery graphics_device:chr_file rw_file_perms; 67 allow recovery graphics_device:dir r_dir_perms; 68 allow recovery input_device:dir r_dir_perms; 69 allow recovery input_device:chr_file r_file_perms; 70 allow recovery tty_device:chr_file rw_file_perms; 71 72 # Create /tmp/recovery.log and execute /tmp/update_binary. 73 allow recovery tmpfs:file { create_file_perms x_file_perms }; 74 allow recovery tmpfs:dir create_dir_perms; 75 76 # Manage files on /cache 77 allow recovery cache_file:dir create_dir_perms; 78 allow recovery cache_file:file create_file_perms; 79 80 # Reboot the device 81 allow recovery powerctl_prop:property_service set; 82 unix_socket_connect(recovery, property, init) 83 84 # Start/stop adbd via ctl.start adbd 85 allow recovery ctl_default_prop:property_service set; 86 87 # Use setfscreatecon() to label files for OTA updates. 88 allow recovery self:process setfscreate; 89 90 # Allow recovery to create a fuse filesystem, and read files from it. 91 allow recovery fuse_device:chr_file rw_file_perms; 92 allow recovery fuse:dir r_dir_perms; 93 allow recovery fuse:file r_file_perms; 94 95 wakelock_use(recovery) 96 97 # This line seems suspect, as it should not really need to 98 # set scheduling parameters for a kernel domain task. 99 allow recovery kernel:process setsched; 100 ') 101
