sepolicy/vendor/update_engine_common.te

# Allow update_engine and update_engine_sideload (recovery) read/write on the
# device-specific partitions it should update.
allow update_engine_common xbl_block_device:blk_file rw_file_perms;
allow update_engine_common ab_block_device:blk_file rw_file_perms;
allow update_engine_common modem_block_device:blk_file rw_file_perms;

allow update_engine_common postinstall_mnt_dir:dir r_dir_perms;
allow update_engine_common tmpfs:lnk_file r_file_perms;