201 lines
8.5 KiB
Text
201 lines
8.5 KiB
Text
typeattribute apexd coredomain;
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init_daemon_domain(apexd)
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# Allow creating, reading and writing of APEX files/dirs in the APEX data dir
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allow apexd apex_data_file:dir create_dir_perms;
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allow apexd apex_data_file:file create_file_perms;
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# Allow relabeling file created in /data/apex/decompressed
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allow apexd apex_data_file:file relabelfrom;
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# Allow creating, reading and writing of APEX files/dirs in the APEX metadata dir
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allow apexd metadata_file:dir search;
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allow apexd apex_metadata_file:dir create_dir_perms;
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allow apexd apex_metadata_file:file create_file_perms;
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# Allow reserving space on /data/apex/ota_reserved for apex decompression
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allow apexd apex_ota_reserved_file:dir create_dir_perms;
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allow apexd apex_ota_reserved_file:file create_file_perms;
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# Allow apexd to create files and directories for snapshots of apex data
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allow apexd apex_art_data_file:dir { create_dir_perms relabelto };
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allow apexd apex_art_data_file:file { create_file_perms relabelto };
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allow apexd apex_permission_data_file:dir { create_dir_perms relabelto };
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allow apexd apex_permission_data_file:file { create_file_perms relabelto };
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allow apexd apex_module_data_file:dir { create_dir_perms relabelfrom };
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allow apexd apex_module_data_file:file { create_file_perms relabelfrom };
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allow apexd apex_rollback_data_file:dir create_dir_perms;
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allow apexd apex_rollback_data_file:file create_file_perms;
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allow apexd apex_scheduling_data_file:dir { create_dir_perms relabelto };
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allow apexd apex_scheduling_data_file:file { create_file_perms relabelto };
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allow apexd apex_wifi_data_file:dir { create_dir_perms relabelto };
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allow apexd apex_wifi_data_file:file { create_file_perms relabelto };
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# Allow apexd to read directories under /data/misc_de in order to snapshot and
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# restore apex data for all users.
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allow apexd system_data_file:dir r_dir_perms;
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# allow apexd to create loop devices with /dev/loop-control
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allow apexd loop_control_device:chr_file rw_file_perms;
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# allow apexd to access loop devices
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allow apexd loop_device:blk_file rw_file_perms;
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allowxperm apexd loop_device:blk_file ioctl {
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LOOP_GET_STATUS64
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LOOP_SET_STATUS64
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LOOP_SET_FD
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LOOP_SET_BLOCK_SIZE
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LOOP_SET_DIRECT_IO
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LOOP_CLR_FD
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BLKFLSBUF
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LOOP_CONFIGURE
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};
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# allow apexd to access /dev/block
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allow apexd block_device:dir r_dir_perms;
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#allow apexd to access virtual disks
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allow apexd vd_device:blk_file r_file_perms;
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# allow apexd to access /dev/block/dm-* (device-mapper entries)
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allow apexd dm_device:chr_file rw_file_perms;
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allow apexd dm_device:blk_file rw_file_perms;
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# sys_admin is required to access the device-mapper and mount
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# dac_override, chown, and fowner are needed for snapshot and restore
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allow apexd self:global_capability_class_set { sys_admin chown dac_override dac_read_search fowner };
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# Note: fsetid is deliberately not included above. fsetid checks are
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# triggered by chmod on a directory or file owned by a group other
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# than one of the groups assigned to the current process to see if
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# the setgid bit should be cleared, regardless of whether the setgid
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# bit was even set. We do not appear to truly need this capability
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# for apexd to operate.
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dontaudit apexd self:global_capability_class_set fsetid;
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# allow apexd to create a mount point in /apex
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allow apexd apex_mnt_dir:dir create_dir_perms;
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# allow apexd to mount in /apex
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allow apexd apex_mnt_dir:filesystem { mount unmount };
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allow apexd apex_mnt_dir:dir mounton;
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# allow apexd to create symlinks in /apex
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allow apexd apex_mnt_dir:lnk_file create_file_perms;
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# allow apexd to create /apex/apex-info-list.xml and relabel to apex_info_file
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allow apexd apex_mnt_dir:file { create_file_perms relabelfrom mounton };
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allow apexd apex_info_file:file relabelto;
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# allow apexd to unlink apex files in /data/apex/active
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# note that apexd won't be able to unlink files in /data/app-staging/session_XXXX,
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# because it doesn't have write permission for staging_data_file object.
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allow apexd staging_data_file:file unlink;
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# allow apexd to read files from /data/app-staging and hardlink them to /data/apex.
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allow apexd staging_data_file:dir r_dir_perms;
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allow apexd staging_data_file:file { r_file_perms link };
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# # Allow relabeling file created in /data/apex/decompressed
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allow apexd staging_data_file:file relabelto;
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# allow apexd to read files from /vendor/apex
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allow apexd vendor_apex_file:dir r_dir_perms;
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allow apexd vendor_apex_file:file r_file_perms;
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# Unmount and mount filesystems
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allow apexd labeledfs:filesystem { mount unmount };
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# /sys directory tree traversal
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allow apexd sysfs_type:dir search;
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# Configure read-ahead of dm-verity and loop devices
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# for dm-X
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allow apexd sysfs_dm:dir r_dir_perms;
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allow apexd sysfs_dm:file rw_file_perms;
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# for loopX
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allow apexd sysfs_loop:dir r_dir_perms;
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allow apexd sysfs_loop:file rw_file_perms;
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# Allow apexd to log to the kernel.
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allow apexd kmsg_device:chr_file w_file_perms;
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# Allow apexd to reboot device. Required for rollbacks of apexes that are
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# not covered by rollback manager.
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set_prop(apexd, powerctl_prop)
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# Allow apexd to stop itself
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set_prop(apexd, ctl_apexd_prop)
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# Find the vold service, and call into vold to manage FS checkpoints
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allow apexd vold_service:service_manager find;
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binder_call(apexd, vold)
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# Apex pre- & post-install permission.
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# Allow self-execute for the fork mount helper.
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allow apexd apexd_exec:file execute_no_trans;
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# Unshare and make / private so that hooks cannot influence the
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# running system.
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allow apexd rootfs:dir mounton;
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# Allow to execute shell for pre- and postinstall scripts. A transition
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# rule is required, thus restricted to execute and not execute_no_trans.
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allow apexd shell_exec:file { r_file_perms execute };
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# apexd is using bootstrap bionic
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allow apexd system_bootstrap_lib_file:dir r_dir_perms;
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allow apexd system_bootstrap_lib_file:file { execute read open getattr map };
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# Allow transition to test APEX preinstall domain.
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userdebug_or_eng(`
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domain_auto_trans(apexd, apex_test_prepostinstall_exec, apex_test_prepostinstall)
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')
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# Allow transition to GKI update pre/post install domain
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domain_auto_trans(apexd, gki_apex_prepostinstall_exec, gki_apex_prepostinstall)
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# Allow apexd to be invoked with logwrapper from init during userspace reboot.
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allow apexd devpts:chr_file { read write };
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# Allow apexd to create pts files via logwrap_fork_exec for its own use, to pass to
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# other processes
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create_pty(apexd)
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# Allow apexd to read file contexts when performing restorecon of snapshots.
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allow apexd file_contexts_file:file r_file_perms;
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# Allow apexd to execute toybox for snapshot & restore
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allow apexd toolbox_exec:file rx_file_perms;
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# Allow apexd to read ro.cold_boot_done prop.
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# apexd uses it to decide whether it needs to keep retrying polling for loop device.
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get_prop(apexd, cold_boot_done_prop)
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# Allow apexd to read per-device configuration properties.
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get_prop(apexd, apexd_config_prop)
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neverallow { domain -apexd -init } apex_data_file:dir no_w_dir_perms;
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neverallow { domain -apexd -init } apex_metadata_file:dir no_w_dir_perms;
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neverallow { domain -apexd -init -kernel } apex_data_file:file no_w_file_perms;
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neverallow { domain -apexd -init -kernel } apex_metadata_file:file no_w_file_perms;
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neverallow { domain -apexd } apex_mnt_dir:lnk_file no_w_file_perms;
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neverallow { domain -apexd -init -vold_prepare_subdirs } apex_module_data_file:dir no_w_dir_perms;
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neverallow { domain -apexd -init -vold_prepare_subdirs } apex_module_data_file:file no_w_file_perms;
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neverallow { domain -apexd -init -vold_prepare_subdirs } apex_rollback_data_file:dir no_w_dir_perms;
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neverallow { domain -apexd -init -vold_prepare_subdirs } apex_rollback_data_file:file no_w_file_perms;
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# only apexd can set apexd sysprop
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set_prop(apexd, apexd_prop)
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neverallow { domain -apexd -init } apexd_prop:property_service set;
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# only apexd can write apex-info-list.xml
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neverallow { domain -apexd } apex_info_file:file no_w_file_perms;
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# Only apexd and init should be allowed to manage /apex mounts
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# A note on otapreopt_chroot. It used to mount APEXes during postainstall stage of A/B OTAs,
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# but starting from S it just calls into apexd to prepare /apex for otapreoprt. Once the sepolicies
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# around otapreopt_chroot are cleaned up we should be able to remove it from the lists below.
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neverallow { domain -apexd -init -otapreopt_chroot } apex_mnt_dir:filesystem { mount unmount };
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neverallow { domain -apexd -init -otapreopt_chroot } apex_mnt_dir:dir { mounton };
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# Allow for use in postinstall
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allow apexd otapreopt_chroot:fd use;
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allow apexd postinstall_apex_mnt_dir:dir { create_dir_perms mounton };
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allow apexd postinstall_apex_mnt_dir:file { create_file_perms relabelfrom };
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allow apexd proc_filesystems:file r_file_perms;
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