Prevent direct opens into the system_app sandbox.

Change-Id: I04c22076939a9a09a6c861ae73da839c879c4ba7
Signed-off-by: William Roberts <william.c.roberts@intel.com>

We decided a different approach for these policies in the
meeting today.

This reverts commit 5507fa66.

Bug: 28008031
Change-Id: Id86520660bdbc3fc36ac4acf51082547d6a559eb

Do not allow other domains to create or unlink files under
the system app sandbox.

Change-Id: I7c3037210c6849c3b0fc205fa71fa5ed4dcac1c2
Signed-off-by: William Roberts <william.c.roberts@intel.com>

Change-Id: Idaf59ab51f7873d4d75969c5f4e62b5fbf608ef5
Signed-off-by: William Roberts <william.c.roberts@intel.com>

update_engine had an automatic transition to the "postinstall" domain
when executing a "postinstall_file" which required it to be an
entrypoint. This patch removes this automatic transition and the
associated rules in update_engine.te, removing as well the need to
add exec_type to postinstall_file. Instead, update_engine now makes
this transition explicit by calling setexeccon(3).

Bug: 28008031
TEST=make dist; Deployed an update to edison-eng: postinstall runs as "postinstall" domain.

Change-Id: I2b799ac4808c90b010a9e776aaa7015020a94b49

Bug: 27965066
Change-Id: Ia0690c544876e209e4c080b0e959f763b731c48a

Some of the init allow rules were well passed 100 characters and
were difficult to read. Format them to use the one-per-line
set subtraction format as seen in other locations within sepolicy.

Change-Id: Ifeeb3a8a81c4c19bfb1e56e7f2493f817e896eaf
Signed-off-by: William Roberts <william.c.roberts@intel.com>

Postinstall testing requires to mount a filesystem and relabel its
files to postinstall_file. While this task will normally be performed
by the update_engine daemon running in a domain of the same name, we
also test this workflow with sample images from /data/nativetest in
eng builds.

This hides the log messages from the 'su' context when mounting and
relabeling a filesystem onto the postinstall mountpoint.

Bug: 27272144
Bug: 26955860
TEST=m; update_engine_unittests pass Postinstall tests.

Change-Id: Id39aa1afdc11a6f59434873e68a53cbcb6ae363f

The auditallow for install_recovery accessing cache_recovery_files
hasn't triggered, so drop the rules as they don't appear to be
used.

Change-Id: I74bb152b6c829612594c647674907e16783fa477

Followup to 121f5bfd.

Move misc_logd_file neverallow rule from domain.te to logd.te,
since the goal of the neverallow rule is to protect logd / logpersist
files from other processes.

Switch the misc_logd_file neverallow rule from using "rw_file_perms"
to "no_rw_file_perms". The latter covers more cases of file
modifications.

Add more neverallow rules covering misc_logd_file directories.

Instead of using not_userdebug_nor_eng(), modify the rules to be
consistent with other highly constrained file types such as
keystore_data_file or vold_data_file. See, for example,
https://android-review.googlesource.com/144768

To see the net effect of this change, you can use the following
command line:

  sesearch --allow -t misc_logd_file -c file,dir,lnk_file \
  out/target/product/bullhead/root/sepolicy

Before this change:

  # userdebug builds
  allow init misc_logd_file:dir { search setattr read create getattr write relabelfrom ioctl rmdir remove_name relabelto open add_name };
  allow init misc_logd_file:file { setattr read create write relabelfrom getattr relabelto unlink open };
  allow init misc_logd_file:lnk_file { setattr relabelfrom create getattr relabelto unlink };
  allow logd misc_logd_file:dir { search read lock getattr write ioctl remove_name open add_name };
  allow logd misc_logd_file:file { rename setattr read lock create getattr write ioctl unlink open append };
  allow shell misc_logd_file:dir { search read lock getattr ioctl open };
  allow shell misc_logd_file:file { read lock ioctl open getattr };

  # user builds
  allow init misc_logd_file:dir { search setattr read create getattr write relabelfrom ioctl rmdir remove_name relabelto open add_name };
  allow init misc_logd_file:file relabelto;
  allow init misc_logd_file:lnk_file { setattr relabelfrom create getattr relabelto unlink };

After this change:

  # userdebug builds
  allow init misc_logd_file:dir { search setattr read create getattr ioctl relabelto open };
  allow init misc_logd_file:file { relabelto getattr };
  allow init misc_logd_file:lnk_file relabelto;
  allow logd misc_logd_file:dir { search read lock getattr write ioctl remove_name open add_name };
  allow logd misc_logd_file:file { rename setattr read lock create getattr write ioctl unlink open append };
  allow shell misc_logd_file:dir { search read lock getattr ioctl open };
  allow shell misc_logd_file:file { read lock ioctl open getattr };

  # user builds
  allow init misc_logd_file:dir { search setattr read create getattr ioctl relabelto open };
  allow init misc_logd_file:file { relabelto getattr };
  allow init misc_logd_file:lnk_file relabelto;

Change-Id: I0b00215049ad83182f458b4b9e258289c5144479

To write bytes to appfuse file from priv_app, we need to specify
mlstrustedobject.
The CL fixes the following denial.

type=1400 audit(0.0:77): avc: denied { write } for name="10" dev="fuse" ino=10 scontext=u:r:priv_app:s0:c512,c768 tcontext=u:object_r:app_fuse_file:s0 tclass=file permissive=0

BUG=23093747

Change-Id: I9901033bb3349d5def0bd7128db45a1169856dc1

Bug: 27176738
Change-Id: I70e4b7b54044dd541076eddd39a8e9f5d881badf

03-25 09:31:22.996     1     1 W init    : type=1400 audit(0.0:8): \
  avc: denied { getattr } for path="/data/misc/logd/logcat.052" \
  dev="dm-2" ino=124778 scontext=u:r:init:s0 \
  tcontext=u:object_r:misc_logd_file:s0 tclass=file permissive=0
. . .

Introduced a new macro not_userdebug_nor_eng()

Change-Id: I9c3a952c265cac096342493598fff7d41604ca45

Add a neverallow rule (compile time assertion + CTS test) that
isolated_apps and untrusted_apps can't do anything else but append
to /data/anr/traces.txt. In particular, assert that they can't
read from the file, or overwrite other data which may already be
in the file.

Bug: 18340553
Bug: 27853304
Change-Id: I249fe2a46401b660efaa3f1102924a448ed750d5

/dev/uio uio_device is already declared. Accessing uio through /sys
is also common.

Bug: 26990688
Change-Id: I3db941161dae31d3b87f265708abbcd9171a2c1f

sysfs_thermal nodes are common enough to warrant an entry in global
policy and the new HardwarePropertiesManagerService exists explicitly to
expose some of this information.

Address the following denials:
avc: denied { search } for name="thermal" dev="sysfs" ino=17509 scontext=u:r:system_server:s0 tcontext=u:object_r:sysfs_thermal:s0 tclass=dir permissive=1
avc: denied { read } for name="temp" dev="sysfs" ino=17848 scontext=u:r:system_server:s0 tcontext=u:object_r:sysfs_thermal:s0 tclass=file permissive=1
avc: denied { open } for path="/sys/devices/virtual/thermal/thermal_zone8/temp" dev="sysfs" ino=17848 scontext=u:r:system_server:s0 tcontext=u:object_r:sysfs_thermal:s0 tclass=file permissive=1
avc: denied { getattr } for path="/sys/devices/virtual/thermal/thermal_zone8/temp" dev="sysfs" ino=17848 scontext=u:r:system_server:s0 tcontext=u:object_r:sysfs_thermal:s0 tclass=file permissive=1

(cherry-pick of internal commit: 98eff7c3)

Bug: 27809332
Change-Id: I6f812a7e281e348aa24c76b119e71ed95e1a1d9f

One time executables. recovery_refresh can be used at any time to
ensure recovery logs in pmsg are re-placed at the end of the FIFO.
recovery_persist takes the recovery logs in pmsg and drops them
into /data/misc/recovery/ directory.

Bug: 27176738
Change-Id: Ife3cf323930fb7a6a5d1704667961f9d42bfc5ac

See https://groups.google.com/d/msg/android-ndk/BbEOA9pnR-I/HgLkGy5qAgAJ

Addresses the following denial:

  avc: denied { lock } for path="/data/data/com.mypackage/files/somefilename" dev="mmcblk0p28" ino=114736 scontext=u:r:untrusted_app:s0:c512,c768 tcontext=u:object_r:app_data_file:s0:c512,c768 tclass=dir permissive=0

While I'm here, also add lock to w_file_perms.

(cherrypicked from commit 4ee494cc)

Change-Id: I2568a228099c4e112e4a8b80da3bfcf2e35eb0ea

Block other operations which involve non-file descriptor
operations.

Change-Id: I5d813781c201a732aa1ee6ff6fd3d82f2af32ec7

BUG: 27419521
Change-Id: I63108468d75be3ef7f9761107a3df8997f207d07

This policy takes effect only when building with
SANITIZE_TARGET=address and allows the Zygote to load libraries from
/data. That's where ASan-instrumented copies of system libraries are
located. 32-bit library directories have been added a while back;
this CL extends the same policy to 64-bit directories.

Bug: 25751174

Change-Id: Ieb4701b78db9649ec8563f2962a69db537ae61b3

Applications do not explicitly request handles to the batteryproperties
service, but the BatteryManager obtains a reference to it and uses it
for its underlying property queries.  Mark it as an app_api_service so
that all applications may use this API.  Also remove the batterypropreg
service label, as this does not appear to be used and may have been a
duplication of batteryproperties.  As a result, remove the
healthd_service type and replace it with a more specific
batteryproperties_service type.

Bug: 27442760
Change-Id: I5c0f9d7992ff2ec64adaeef22356e88fd0e8169c

HwRngTest needs access to the hwrandom sysfs files, but untrused_app
does not have access to sysfs.  Give these files their own label and
allow the needed read access.

(cherry-pick from internal commit: 85c0f8af)

Bug: 27263241
Change-Id: If572ad0931a534d76e148b688b76687460e99af9

Remove references to /data/security and the corresponding
type securitly_file.

Bug: 26544104
Change-Id: Iac00c293daa6b781a24c2bd4c12168dfb1cceac6

Many permissions were removed from untrusted_app by the removal of
domain_deprecated, including procfs access. procfs file access was restored,
however, but not completely.  Add the ability to getattr to all domains,
so that other domains which lost domain_deprecated may benefit, as they
will likely need it.

Bug: 27249037
Change-Id: Id3f5e6121548b29d739d5e0fa6ccdbc9f0fc29be

Bug: http://b/27367422
Change-Id: I936c16281e06214b35f8d245da8f619dc92ff15f

Bug: 26813932
Change-Id: I155087d28d9284d8c96554cc6739bb676272a00f

am: edd86a63

* commit 'edd86a63':
  New postinstall domain and rules to run post-install program.

am: 01d95c23

* commit '01d95c23':
  Update netlink socket classes.

Define new netlink socket security classes introduced by upstream kernel commit
6c6d2e9bde1c1c87a7ead806f8f5e2181d41a652 ("selinux: update netlink socket
classes").  This was merged in Linux 4.2 and is therefore only required
for Android kernels based on 4.2 or newer (e.g. the android-4.4 branch
of the kernel/common tree).

Add the new socket classes to socket_class_set.
Add an initial set of allow rules although further refinement
will likely be necessary.  Any allow rule previously written
on :netlink_socket may need to be rewritten or duplicated for
one or more of the more specific classes.  For now, we retain
the existing :netlink_socket rules for compatibility on older kernels.

Change-Id: I5040b30edd2d374538490a080feda96dd4bae5bf
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>

When using the A/B updater, a device specific hook is sometimes needed
to run after the new partitions are updated but before rebooting into
the new image. This hook is referred to throughout the code as the
"postinstall" step.

This patch creates a new execution domain "postinstall" which
update_engine will use to run said hook. Since the hook needs to run
from the new image (namelly, slot "B"), update_engine needs to
temporarly mount this B partition into /postinstall and then run a
program from there.

Since the new program in B runs from the old execution context in A, we
can't rely on the labels set in the xattr in the new filesystem to
enforce the policies baked into the old running image. Instead, when
temporarily mounting the new filesystem in update_engine, we override
all the new file attributes with the new postinstall_file type by
passing "context=u:object_r:postinstall_file:s0" to the mount syscall.
This allows us to set new rules specific to the postinstall environment
that are consistent with the rules in the old system.

Bug: 27177071
TEST=Deployed a payload with a trivial postinstall script to edison-eng.

Change-Id: Ib06fab92afb45edaec3c9c9872304dc9386151b4

am: 6ef10bd4

* commit '6ef10bd4':
  suppress unnecessary makefile output