1# ueventd seclabel is specified in init.rc since 2# it lives in the rootfs and has no unique file type. 3type ueventd, domain; 4 5# Write to /dev/kmsg. 6allow ueventd kmsg_device:chr_file rw_file_perms; 7 8allow ueventd self:capability { chown mknod net_admin setgid fsetid sys_rawio dac_override fowner }; 9allow ueventd device:file create_file_perms; 10 11r_dir_file(ueventd, sysfs_type) 12r_dir_file(ueventd, rootfs) 13allow ueventd sysfs:file w_file_perms; 14allow ueventd sysfs_usb:file w_file_perms; 15allow ueventd sysfs_hwrandom:file w_file_perms; 16allow ueventd sysfs_zram_uevent:file w_file_perms; 17allow ueventd sysfs_type:{ file lnk_file } { relabelfrom relabelto setattr getattr }; 18allow ueventd sysfs_type:dir { relabelfrom relabelto setattr r_dir_perms }; 19allow ueventd sysfs_devices_system_cpu:file rw_file_perms; 20allow ueventd tmpfs:chr_file rw_file_perms; 21allow ueventd dev_type:dir create_dir_perms; 22allow ueventd dev_type:lnk_file { create unlink }; 23allow ueventd dev_type:chr_file { getattr create setattr unlink }; 24allow ueventd dev_type:blk_file { getattr relabelfrom relabelto create setattr unlink }; 25allow ueventd self:netlink_kobject_uevent_socket create_socket_perms_no_ioctl; 26allow ueventd efs_file:dir search; 27allow ueventd efs_file:file r_file_perms; 28 29# Get SELinux enforcing status. 30r_dir_file(ueventd, selinuxfs) 31 32# Access for /vendor/ueventd.rc and /vendor/firmware 33r_dir_file(ueventd, vendor_file) 34 35# Get file contexts for new device nodes 36allow ueventd file_contexts_file:file r_file_perms; 37 38# Use setfscreatecon() to label /dev directories and files. 39allow ueventd self:process setfscreate; 40 41##### 42##### neverallow rules 43##### 44 45# ueventd must never set properties, otherwise deadlocks may occur. 46# https://android-review.googlesource.com/#/c/133120/6/init/devices.cpp@941 47# No writing to the property socket, connecting to init, or setting properties. 48neverallow ueventd property_socket:sock_file write; 49neverallow ueventd init:unix_stream_socket connectto; 50neverallow ueventd property_type:property_service set; 51 52# Restrict ueventd access on block devices to maintenence operations. 53neverallow ueventd dev_type:blk_file ~{ getattr relabelfrom relabelto create setattr unlink }; 54 55# Only relabelto as we would never want to relabelfrom kmem_device or port_device 56neverallow ueventd { kmem_device port_device }:chr_file ~{ getattr create setattr unlink relabelto }; 57