In general, it appears that libselinux and libsepol interpret paths and
contexts as bytes. For instance, selabel_file(5) mentions about the path
field of file_contexts:
Strings representing paths are processed as bytes (as opposed to
Unicode), meaning that non-ASCII characters are not matched
by a single wildcard.
libsepol also uses primitives such as strchr[1], which explicitly
operate at the byte level (see strchr(3)). However, practically, Android
paths and contexts all uses ASCII characters.
Use the str type (i.e., Unicode) for all Python code to avoid a larger
refactoring. Ensure we convert to bytes for inputs and outputs of
libsepolwrap.so. The encoding "ascii" is used, which will raise an error
should a context or type contain non-ASCII characters.
Update headers to match development/docs/copyright-templates.
[1] https://cs.android.com/android/platform/superproject/+/master:external/selinux/libsepol/src/context_record.c;l=224;drc=454466e2e49fd99f36db78396e604962b8682cb4
Bug: 200119288
Test: lunch aosp_bramble-userdebug && m
Test: atest --host fc_sort_test
Test: manually run searchpolicy
Change-Id: I72d41a35f90b2d4112e481cd8d7408764a6c8132
This reverts commit a00863e4d8.
All dependencies for this patch are now merged.
Bug: 184381659
Test: atest
android.security.cts.SELinuxHostTest#testTracefsTypeViolators
Change-Id: Ic268b24222a87cd9f7ff9158eb16a20f1cb3ecbb
Revert submission 1668411
Reason for revert: Suspect for b/186173384
Reverted Changes:
Iaa4fce9f0:Check that tracefs files are labelled as tracefs_t...
I743a81489:Exclude vendor_modprobe from debugfs neverallow re...
I63a22402c:Add neverallows for debugfs access
I289f2d256:Add a neverallow for debugfs mounting
Change-Id: I398e7ecb0403c2044027c3145438d02b9ffaeb8a
One of the advantages of the DMA-BUF heaps framework over
ION is that each heap is a separate char device and hence
it is possible to create separate sepolicy permissions to restrict
access to each heap.
In the case of ION, allocation in every heap had to be done through
/dev/ion which meant that there was no away to restrict allocations in
a specific heap.
This patch intends to restrict coredomain access to only approved
categories of vendor heaps. Currently, the only identified category
as per partner feedback is the system-secure heap which is defined
as a heap that allocates from protected memory.
Test: Build, video playback works on CF with ION disabled and
without sepolicy denials
Bug: 175697666
Change-Id: I923d2931c631d05d569e97f6e49145ef71324f3b
We need to be able to access app data files from core domains such as
installd even for vendor apps. Those file types should not be
core_data_file_type, so we explicitly exempty app_data_file_type as
well as core_data_file_type from the relevant neverallows.
To prevent misuse of the attribute, add a test to check it is not
applied to anything in file_contexts. Exempt the existing violators in
system policy for now.
Test: Builds
Test: Adding a type with just "file_type, data_file_type, app_data_file_type" works
Test: New test successfully catches violators.
Bug: 171795911
Change-Id: I07bf3ec3db615f8b7a33d8235da5e6d8e2508975
Adds missing partitions to Treble sepolicy tests, and makes exceptions
explicit.
Bug: 154851797
Test: build runs this test
Change-Id: I93f3e633981383d3d215d3a850f6ade12c910415
system_property_type and vendor_property_type can't be assigned
together. For example, the following policy snippet will fail.
system_public_prop(foo_prop)
typeattribute foo_prop vendor_property_type;
product_property_type is currently synonym for system_property_type, so
we only check those two.
Bug: 171437654
Test: m selinux_policy
Test: add "typeattribute default_prop vendor_property_type;" to
property.te and then "m selinux_policy"
Change-Id: I1cdbf3d04264bb045568c30f19339dfe3889dbb4
system_file_type is an attribute assigned to all files on the /system
partition. Add a compile time test to ensure that the attribute is
assigned to all the relevant types.
Test: code compiles.
Change-Id: I7d69a04a4f04f6269cc408f25527b948756cc079
system_file_type is a new attribute used to identify files which exist
on the /system partition. It's useful for allow rules in init, which are
based off of a blacklist of writable files. Additionally, it's useful
for constructing neverallow rules to prevent regressions.
Additionally, add commented out tests which enforce that all files on
the /system partition have the system_file_type attribute. These tests
will be uncommented in a future change after all the device-specific
policies are cleaned up.
Test: Device boots and no obvious problems.
Change-Id: Id9bae6625f042594c8eba74ca712abb09702c1e5
Types in sysfs should have the sysfs_type attribute, types in
debugfs and tracefs should have the debugfs_type attribute.
TODO: Test that files in procfs have the proc_type attribute.
TODO: Assert these tests in CTS.
Bug: 74182216
Test: build - these are build-time tests.
Change-Id: Icf0ff2a26c05f94da421ba23df0b92d8eef906bf
Two areas need better coverage:
1. Tests are not verifying that files in /data/vendor do not have the
core_data_file_type attribute.
2. No error is thrown if a type lives in both /data/vendor
/data/<not vendor>.
Bug: 72998741
Test: build all selinux policies on master (assert build time tests)
Test: build and boot Marlin and Taimen, verify no selinux denials and
everything works as expected.
Change-Id: I133a068123139a599b9b81ddcc254616894621eb
(cherry picked from commit 55d5e28472)
This change renames the non-platform sepolicy files on a DUT from
nonplat_* to vendor_*.
It also splits the versioned platform sepolicy from vendor_sepolicy.cil
to a new file /vendor/etc/selinux/plat_pub_versioned.cil. And only keeps
vendor customizations in vendor_sepolicy.cil.
Build variable BOARD_SEPOLICY_DIRS is also renamed to
BOARD_VENDOR_SEPOLICY_DIRS.
Bug: 64240127
Test: boot bullhead/taimen
Change-Id: Iea2210c9c8ab30c9ecbcd8146f074e76e90e6943
Data outside of /data/vendor should have the core_data_file_type.
Exempt data_between_core_and_vendor for some types.
Ensure core_data_file_type and coredomain_socket do not get expanded
to their underlying types.
Test: build sepolicy for all targets in master (this is a build time
test)
Bug: 34980020
Change-Id: I59387a87875f4603a001fb03f22fa31cae84bf5a
(cherry picked from commit bdd454792d)
Bug: 37008075
Test: build, all tests pass. Modify some attributes locally to
cause tests to fail (verify that they are actually working).
Change-Id: If9f9ece61dff835f38ef9c8a57f5a7baddbae5cd
