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:global_capability_class_set { chown mknod net_admin setgid fsetid sys_rawio dac_override fowner }; 9allow ueventd device:file create_file_perms; 10 11r_dir_file(ueventd, rootfs) 12 13# ueventd needs write access to files in /sys to regenerate uevents 14allow ueventd sysfs_type:file w_file_perms; 15r_dir_file(ueventd, sysfs_type) 16allow ueventd sysfs_type:{ file lnk_file } { relabelfrom relabelto setattr }; 17allow ueventd sysfs_type:dir { relabelfrom relabelto setattr }; 18allow ueventd tmpfs:chr_file rw_file_perms; 19allow ueventd dev_type:dir create_dir_perms; 20allow ueventd dev_type:lnk_file { create unlink }; 21allow ueventd dev_type:chr_file { getattr create setattr unlink }; 22allow ueventd dev_type:blk_file { getattr relabelfrom relabelto create setattr unlink }; 23allow ueventd self:netlink_kobject_uevent_socket create_socket_perms_no_ioctl; 24allow ueventd efs_file:dir search; 25allow ueventd efs_file:file r_file_perms; 26 27# Get SELinux enforcing status. 28r_dir_file(ueventd, selinuxfs) 29 30# Access for /vendor/ueventd.rc and /vendor/firmware 31r_dir_file(ueventd, { vendor_file_type -vendor_app_file -vendor_overlay_file }) 32 33# Get file contexts for new device nodes 34allow ueventd file_contexts_file:file r_file_perms; 35 36# Use setfscreatecon() to label /dev directories and files. 37allow ueventd self:process setfscreate; 38 39# Allow ueventd to read androidboot.android_dt_dir from kernel cmdline. 40allow ueventd proc_cmdline:file r_file_perms; 41 42##### 43##### neverallow rules 44##### 45 46# ueventd must never set properties, otherwise deadlocks may occur. 47# https://android-review.googlesource.com/#/c/133120/6/init/devices.cpp@941 48# No writing to the property socket, connecting to init, or setting properties. 49neverallow ueventd property_socket:sock_file write; 50neverallow ueventd init:unix_stream_socket connectto; 51neverallow ueventd property_type:property_service set; 52 53# Restrict ueventd access on block devices to maintenence operations. 54neverallow ueventd dev_type:blk_file ~{ getattr relabelfrom relabelto create setattr unlink }; 55 56# Only relabelto as we would never want to relabelfrom kmem_device or port_device 57neverallow ueventd { kmem_device port_device }:chr_file ~{ getattr create setattr unlink relabelto }; 58