1 # ueventd seclabel is specified in init.rc since 2 # it lives in the rootfs and has no unique file type. 3 type ueventd, domain; 4 5 # Write to /dev/kmsg. 6 allow ueventd kmsg_device:chr_file rw_file_perms; 7 8 allow ueventd self:global_capability_class_set { chown mknod net_admin setgid fsetid sys_rawio dac_override fowner }; 9 allow ueventd device:file create_file_perms; 10 11 r_dir_file(ueventd, rootfs) 12 13 # ueventd needs write access to files in /sys to regenerate uevents 14 allow ueventd sysfs_type:file w_file_perms; 15 r_dir_file(ueventd, sysfs_type) 16 allow ueventd sysfs_type:{ file lnk_file } { relabelfrom relabelto setattr }; 17 allow ueventd sysfs_type:dir { relabelfrom relabelto setattr }; 18 allow ueventd tmpfs:chr_file rw_file_perms; 19 allow ueventd dev_type:dir create_dir_perms; 20 allow ueventd dev_type:lnk_file { create unlink }; 21 allow ueventd dev_type:chr_file { getattr create setattr unlink }; 22 allow ueventd dev_type:blk_file { getattr relabelfrom relabelto create setattr unlink }; 23 allow ueventd self:netlink_kobject_uevent_socket create_socket_perms_no_ioctl; 24 allow ueventd efs_file:dir search; 25 allow ueventd efs_file:file r_file_perms; 26 27 # Get SELinux enforcing status. 28 r_dir_file(ueventd, selinuxfs) 29 30 # Access for /vendor/ueventd.rc and /vendor/firmware 31 r_dir_file(ueventd, { vendor_file_type -vendor_app_file -vendor_overlay_file }) 32 33 # Get file contexts for new device nodes 34 allow ueventd file_contexts_file:file r_file_perms; 35 36 # Use setfscreatecon() to label /dev directories and files. 37 allow ueventd self:process setfscreate; 38 39 # Allow ueventd to read androidboot.android_dt_dir from kernel cmdline. 40 allow 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. 49 neverallow ueventd property_socket:sock_file write; 50 neverallow ueventd init:unix_stream_socket connectto; 51 neverallow ueventd property_type:property_service set; 52 53 # Restrict ueventd access on block devices to maintenence operations. 54 neverallow 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 57 neverallow ueventd { kmem_device port_device }:chr_file ~{ getattr create setattr unlink relabelto }; 58
