android_system_sepolicy/private/blkid.te
Alex Klyubin f5446eb148 Vendor domains must not use Binder
On PRODUCT_FULL_TREBLE devices, non-vendor domains (except vendor
apps) are not permitted to use Binder. This commit thus:
* groups non-vendor domains using the new "coredomain" attribute,
* adds neverallow rules restricting Binder use to coredomain and
  appdomain only, and
* temporarily exempts the domains which are currently violating this
  rule from this restriction. These domains are grouped using the new
  "binder_in_vendor_violators" attribute. The attribute is needed
  because the types corresponding to violators are not exposed to the
  public policy where the neverallow rules are.

Test: mmm system/sepolicy
Test: Device boots, no new denials
Test: In Chrome, navigate to ip6.me, play a YouTube video
Test: YouTube: play a video
Test: Netflix: play a movie
Test: Google Camera: take a photo, take an HDR+ photo, record video with
      sound, record slow motion video with sound. Confirm videos play
      back fine and with sound.
Bug: 35870313
Change-Id: I0cd1a80b60bcbde358ce0f7a47b90f4435a45c95
2017-03-24 07:54:00 -07:00

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# blkid called from vold
typeattribute blkid coredomain;
type blkid_exec, exec_type, file_type;
# Allowed read-only access to encrypted devices to extract UUID/label
allow blkid block_device:dir search;
allow blkid userdata_block_device:blk_file r_file_perms;
allow blkid dm_device:blk_file r_file_perms;
# Allow stdin/out back to vold
allow blkid vold:fd use;
allow blkid vold:fifo_file { read write getattr };
# For blkid launched through popen()
allow blkid blkid_exec:file rx_file_perms;
# Only allow entry from vold
neverallow { domain -vold } blkid:process transition;
neverallow * blkid:process dyntransition;
neverallow blkid { file_type fs_type -blkid_exec -shell_exec }:file entrypoint;