50bb7b5a67
Label /proc/misc and allow access to untrusted_apps targeting older API versions, as well as update_engine_common. /proc/misc is used by some banking apps to try to detect if they are running in an emulated environment. TODO: Remove access to proc:file from update_engine_common after more testing. Bug: 35917228 Test: Device boots and no new denials. Change-Id: If1b97a9c55a74cb74d1bb15137201ffb95b5bd75
42 lines
1.9 KiB
Text
42 lines
1.9 KiB
Text
# update_engine payload application permissions. These are shared between the
|
|
# background daemon and the recovery tool to sideload an update.
|
|
|
|
# Allow update_engine to reach block devices in /dev/block.
|
|
allow update_engine_common block_device:dir search;
|
|
|
|
# Allow read/write on system and boot partitions.
|
|
allow update_engine_common boot_block_device:blk_file rw_file_perms;
|
|
allow update_engine_common system_block_device:blk_file rw_file_perms;
|
|
|
|
# Allow to set recovery options in the BCB. Used to trigger factory reset when
|
|
# the update to an older version (channel change) or incompatible version
|
|
# requires it.
|
|
allow update_engine_common misc_block_device:blk_file rw_file_perms;
|
|
|
|
# Allow update_engine_common to mount on the /postinstall directory and reset the
|
|
# labels on the mounted filesystem to postinstall_file.
|
|
allow update_engine_common postinstall_mnt_dir:dir mounton;
|
|
allow update_engine_common postinstall_file:filesystem { mount unmount relabelfrom relabelto };
|
|
allow update_engine_common labeledfs:filesystem relabelfrom;
|
|
|
|
# Allow update_engine_common to read and execute postinstall_file.
|
|
allow update_engine_common postinstall_file:file rx_file_perms;
|
|
allow update_engine_common postinstall_file:lnk_file r_file_perms;
|
|
allow update_engine_common postinstall_file:dir r_dir_perms;
|
|
|
|
|
|
# A postinstall program is typically a shell script (with a #!), so we allow
|
|
# to execute those.
|
|
allow update_engine_common shell_exec:file rx_file_perms;
|
|
|
|
# Allow update_engine_common to suspend, resume and kill the postinstall program.
|
|
allow update_engine_common postinstall:process { signal sigstop };
|
|
|
|
# access /proc/misc
|
|
# Access is also granted to proc:file, but it is likely unneeded
|
|
# due to the more specific grant to proc_misc immediately below.
|
|
allow update_engine proc:file r_file_perms; # delete candidate
|
|
allow update_engine proc_misc:file r_file_perms;
|
|
|
|
# read directories on /system and /vendor
|
|
allow update_engine system_file:dir r_dir_perms;
|