89d771871e
Comments indicate that these permissions are used to access already
open FDs. However, getattr of a directory is clearly not necessary
for that, search of system_data_file is already granted to domain
and following symlinks is clearly not needed for reading an already
open FD.
Bug: 34980020
Test: boot marlin. Test drm with google play movies, no related
denials
Test: cts-tradefed run cts -m CtsMediaTestCases -t \
android.media.cts.MediaCasTest
5/6 tests fail with no related selinux denials. The same 5/6
also fail in selinux permissive mode.
Change-Id: Ib4b9a1e18bdc479d656b2d64917bbc0358515525
35 lines
1.1 KiB
Text
35 lines
1.1 KiB
Text
# HwBinder IPC from client to server, and callbacks
|
|
binder_call(hal_cas_client, hal_cas_server)
|
|
binder_call(hal_cas_server, hal_cas_client)
|
|
|
|
add_hwservice(hal_cas_server, hal_cas_hwservice)
|
|
allow hal_cas_client hal_cas_hwservice:hwservice_manager find;
|
|
allow hal_cas_server hidl_memory_hwservice:hwservice_manager find;
|
|
|
|
# Permit reading device's serial number from system properties
|
|
get_prop(hal_cas, serialno_prop)
|
|
|
|
# Read files already opened under /data
|
|
allow hal_cas system_data_file:file { getattr read };
|
|
|
|
# Read access to pseudo filesystems
|
|
r_dir_file(hal_cas, cgroup)
|
|
allow hal_cas cgroup:dir { search write };
|
|
allow hal_cas cgroup:file w_file_perms;
|
|
|
|
# Allow access to ion memory allocation device
|
|
allow hal_cas ion_device:chr_file rw_file_perms;
|
|
allow hal_cas hal_graphics_allocator:fd use;
|
|
|
|
allow hal_cas tee_device:chr_file rw_file_perms;
|
|
|
|
###
|
|
### neverallow rules
|
|
###
|
|
|
|
# hal_cas should never execute any executable without a
|
|
# domain transition
|
|
neverallow hal_cas { file_type fs_type }:file execute_no_trans;
|
|
|
|
# do not allow privileged socket ioctl commands
|
|
neverallowxperm hal_cas domain:{ rawip_socket tcp_socket udp_socket } ioctl priv_sock_ioctls;
|