platform_system_sepolicy/public/otapreopt_chroot.te
dcashman cc39f63773 Split general policy into public and private components.
Divide policy into public and private components.  This is the first
step in splitting the policy creation for platform and non-platform
policies.  The policy in the public directory will be exported for use
in non-platform policy creation.  Backwards compatibility with it will
be achieved by converting the exported policy into attribute-based
policy when included as part of the non-platform policy and a mapping
file will be maintained to be included with the platform policy that
maps exported attributes of previous versions to the current platform
version.

Eventually we would like to create a clear interface between the
platform and non-platform device components so that the exported policy,
and the need for attributes is minimal.  For now, almost all types and
avrules are left in public.

Test: Tested by building policy and running on device.

Change-Id: Idef796c9ec169259787c3f9d8f423edf4ce27f8c
2016-10-06 13:09:06 -07:00

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# otapreopt_chroot executable
type otapreopt_chroot, domain;
type otapreopt_chroot_exec, exec_type, file_type;
# Chroot preparation and execution.
# We need to create an unshared mount namespace, and then mount /data.
allow otapreopt_chroot postinstall_file:dir { search mounton };
allow otapreopt_chroot self:capability { sys_admin sys_chroot };
# This is required to mount /vendor.
allow otapreopt_chroot block_device:dir search;
allow otapreopt_chroot labeledfs:filesystem mount;
# Mounting /vendor can have this side-effect. Ignore denial.
dontaudit otapreopt_chroot kernel:process setsched;
# Allow otapreopt to use file descriptors from update-engine. It will
# close them immediately.
allow otapreopt_chroot postinstall:fd use;
allow otapreopt_chroot update_engine:fd use;
allow otapreopt_chroot update_engine:fifo_file write;