One day we won't need this mechanism any more & can remove all traces
of it.
Bug: 141677108
Test: builds
Change-Id: I95525a163ab4f19d8ca411c02a3c06498c6777ef
We no longer allow apps with mlstrustedsubject access to app_data_file
or privapp_data_file. For compatibility we grant access to all apps on
vendor images for SDK <= 30, whether mlstrustedsubject or not. (The
ones that are not already have access, but that is harmless.)
Additionally we have started adding categories to system_data_file
etc. We treat these older vendor apps as trusted for those types only.
The result is that apps on older vendor images still have all the
access they used to but no new access.
We add a neverallow to prevent the compatibility attribute being
abused.
Test: builds
Change-Id: I10a885b6a122292f1163961b4a3cf3ddcf6230ad
Steps taken to produce the mapping files:
1. Add prebuilts/api/30.0/plat_pub_versioned.cil from the
/vendor/etc/selinux/plat_pub_versioned.cil file built on rvc-dev with
lunch target aosp_arm64-eng. Add prebuilts/api/30.0/vendor_sepolicy.cil
as an empty file.
2. Add new file private/compat/30.0/30.0.cil by doing the following:
- copy /system/etc/selinux/mapping/30.0.cil from rvc-dev aosp_arm64-eng
device to private/compat/30.0/30.0.cil
- remove all attribute declaration statement (typeattribute ...) and
sort lines alphabetically
- some selinux types were added/renamed/deleted w.r.t 30 sepolicy.
Find all such types using treble_sepolicy_tests_30.0 test.
- for all these types figure out where to map them by looking at
29.0.[ignore.]cil files and add approprite entries to 30.0.[ignore.]cil.
This change also enables treble_sepolicy_tests_30.0 and installs
30.0.cil mapping file onto the device.
Bug: 153661471
Test: m treble_sepolicy_tests_30.0
Test: m 30.0_compat_test
Test: m selinux_policy
Change-Id: I6dfae41fbd5f245119ede540d2c321688d6e7929
