This required for kernel to do loopback mounts on filesystem
images created by the kernel system call tests in LTP.

Add a corresponding neverallow to stop all domains from accessing
the location at /data/local/tmp/ltp.

Bug: 73220071
Test: Boot sailfish successfully
Test: run vts-kernel -m VtsKernelLtp -t syscalls.fchown04

Change-Id: I73f5f14017e22971fc246a05751ba67be4653bca
Signed-off-by: Sandeep Patil <sspatil@google.com>

In kernel 4.7, the capability and capability2 classes were split apart
from cap_userns and cap2_userns (see kernel commit
8e4ff6f228e4722cac74db716e308d1da33d744f). Since then, Android cannot be
run in a container with SELinux in enforcing mode.

This change applies the existing capability rules to user namespaces as
well as the root namespace so that Android running in a container
behaves the same on pre- and post-4.7 kernels.

This is essentially:
  1. New global_capability_class_set and global_capability2_class_set
     that match capability+cap_userns and capability2+cap2_userns,
     respectively.
  2. s/self:capability/self:global_capability_class_set/g
  3. s/self:capability2/self:global_capability2_class_set/g
  4. Add cap_userns and cap2_userns to the existing capability_class_set
     so that it covers all capabilities.  This set was used by several
     neverallow and dontaudit rules, and I confirmed that the new
     classes are still appropriate.

Test: diff new policy against old and confirm that all new rules add
      only cap_userns or cap2_userns;
      Boot ARC++ on a device with the 4.12 kernel.
Bug: crbug.com/754831

Change-Id: I4007eb3a2ecd01b062c4c78d9afee71c530df95f

Bug: 65643247
Test: sailfish boots, can take pictures, use browser without denials
form kernel domain.
Change-Id: I4fc0555f0b65fc5537e0b2765142b384ed0560c8

Bug: 37916906
Test: Builds 'n' boots.
Change-Id: Ia1d86264446ebecc1ca79f32f11354921bc77668
Merged-In: I208ec6a864127a059fb389417a9c6b259d7474cb

This CL was accidentally reverted a second time by commit:
cb5129f9.  Submit it for the third,
and final, time.

(cherry-pick of 5637587d
which was in AOSP and internal master but not stage-aosp-master)

Bug: 62102757
Test: Builds and boots.
Change-Id: I0394907e808c737422e644aec452baa3e777cf6f

Bug: 37916906
Test: Builds 'n' boots.
Change-Id: Ia1d86264446ebecc1ca79f32f11354921bc77668
Merged-In: I208ec6a864127a059fb389417a9c6b259d7474cb

1. Labeled:
/proc/cmdline -> proc_cmdline

2. Removed access to proc label from vold domain.

3. Added access proc_cmdline to these domains:
init, kernel, vold

4. Also, added proc_drop_caches access to vold.

Bug: 66497047
Test: device boots without selinux denials to new labels
Change-Id: Ic88d11b7e56b07c0e8bd874e7f72788922a218e3

This CL was accidentally reverted a second time by commit:
cb5129f9.  Submit it for the third,
and final, time.

Bug: 62102757
Test: Builds and boots.

This reverts commit c147b592.

The new domain changed neverallows, breaking CTS compatability.
Revert the domain now, with the intention to re-add for the next
release.

Bug: 62102757
Test: domain is set to priv_app
Change-Id: I907ff7c513cd642a306e3eaed3937352ced90005

This reverts commit c00c07c1.

Change-Id: I0c4f5e8cece9c48672a5210adb7e8427e4fd427a

This reverts commit c147b592.

The new domain changed neverallows, breaking CTS compatability.
Revert the domain now, with the intention to re-add for the next
release.

Bug: 62102757
Test: domain is set to priv_app
Change-Id: I907ff7c513cd642a306e3eaed3937352ced90005

These were missing when the sepolicy was migrated.

Addresses denials:

E SELinux : avc:  denied  { find } for service=drm.drmManager pid=11769
uid=10018 scontext=u:r:mediaprovider:s0:c512,c768
tcontext=u:object_r:drmserver_service:s0 tclass=service_manager

W kworker/u16:2: type=1400 audit(0.0:1667): avc: denied { use } for
path="/storage/emulated/0/DCIM/Camera/IMG_20170425_124723.jpg"
dev="sdcardfs" ino=1032250 scontext=u:r:kernel:s0
tcontext=u:r:mediaprovider:s0:c512,c768 tclass=fd permissive=0

Bug: 37685394
Bug: 37686255
Test: Sync files
Test: Open downloaded file

Change-Id: Ibb02d233720b8510c3eec0463b8909fcc5bbb73d

MediaProvider requires permissions that diverge from those
of a typical priv_app. This create a new domain and removes
Mtp related permissions from priv_app.

Bug: 33574909
Test: Connect with MTP, download apps and files, select ringtones
Test: DownloadProvider instrument tests, CtsProviderTestCases

Change-Id: I950dc11f21048c34af639cb3ab81873d2a6730a9

MediaProvider requires permissions that diverge from those
of a typical priv_app. This create a new domain and removes
Mtp related permissions from priv_app.

Bug: 33574909
Test: Connect with MTP, download apps and files, select ringtones
Test: DownloadProvider instrument tests, CtsProviderTestCases

Change-Id: I950dc11f21048c34af639cb3ab81873d2a6730a9

file_context files need to be explicitly labeled as they are now split
across system and vendor and won't have the generic world readable
'system_file' label.

Bug: 36002414
Test: no new 'file_context' denials at boot complete on sailfish
Test: successfully booted into recovery without denials and sideloaded
OTA update.
Test: ./cts-tradefed run singleCommand cts --skip-device-info \
       --skip-preconditions --skip-connectivity-check --abi \
       arm64-v8a --module CtsSecurityHostTestCases -t \
       android.security.cts.SELinuxHostTest#testAospFileContexts

Change-Id: I603157e9fa7d1de3679d41e343de397631666273
Signed-off-by: Sandeep Patil <sspatil@google.com>

This is a special file that can be mounted as a loopback device to
exercise adoptable storage code on devices that don't have valid
physical media.  For example, they may only support storage media
through a USB OTG port that is being used for an adb connection.

avc: denied { read } for path="/data/misc/vold/virtual_disk" dev="sda35" ino=508695 scontext=u:r:kernel:s0 tcontext=u:object_r:vold_data_file:s0 tclass=file permissive=0

Bug: 34903607
Change-Id: I84721ec0e9495189a7d850461875df1839826212

The kernel should never be accessing files owned by other users.

Disallow this access.

Test: Marlin builds. Neverallow are build time assertions,
they do not policy on the device.

Change-Id: I6ba2eb27c0e2ecf46974059588508cd3223baceb

The kernel domain exists solely on boot, and is used by kernel threads.
Because of the way the system starts, there is never an entrypoint for
that domain, not even a file on rootfs. So tighten up the neverallow
restriction.

Remove an obsolete comment. The *.rc files no longer have a setcon
statement, and the transition from the kernel domain to init occurs
because init re-execs itself. The statement no longer applies.

Test: bullhead policy compiles.
Change-Id: Ibe75f3d25804453507dbb05c7a07bba1d37a1c7b

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

No "granted" messages for the removed permissions observed in three
months of log audits.

Bug: 28760354
Change-Id: I6bd9525b663a2bdad4f5b2d4a85d3dd46d5fd106

Grant permissions observed.

Bug: 28760354
Change-Id: Ie63cda709319bbf635ef7bffbba3477c2cccc11b

This reverts commit 9c820a11.

Bug: 31364540
Change-Id: I98a34bd32dd835e6795d31a90f16f4ccd691e6e5

This reverts commit 48d68a64.

Bug: 31364540
Change-Id: I2a83b661e06c84f42c0a7aa566f02d2c135b96c3

(cherry picked from commit 48d68a64)

Remove audit messaged.

Addresses:
avc:  granted  { read } for  pid=1 comm="init" name="cmdline" dev="proc" ino=4026535448 scontext=u:r:kernel:s0 tcontext=u:object_r:proc:s0 tclass=file
avc:  granted  { read open } for  pid=1 comm="init" path="/proc/cmdline" dev="proc" ino=4026535448 scontext=u:r:kernel:s0 tcontext=u:object_r:proc:s0 tclass=file

Bug: 28760354
Change-Id: I48ea01b35c6d1b255995484984ec92203b6083be

Grant permissions observed.

(cherry picked from commit 9c820a11)

Merged-in: Ifdead51f873eb587556309c48fb84ff1542ae303
Bug: 28760354
Change-Id: Ifdead51f873eb587556309c48fb84ff1542ae303

Bug: http://b/30317429
Change-Id: I5c499c48d5e321ebdf588a162d29e949935ad8ee
Test: adb shell dmesg | grep ueventd

Remove audit messaged.

Addresses:
avc:  granted  { read } for  pid=1 comm="init" name="cmdline" dev="proc" ino=4026535448 scontext=u:r:kernel:s0 tcontext=u:object_r:proc:s0 tclass=file
avc:  granted  { read open } for  pid=1 comm="init" path="/proc/cmdline" dev="proc" ino=4026535448 scontext=u:r:kernel:s0 tcontext=u:object_r:proc:s0 tclass=file

Bug: 28760354
Change-Id: I48ea01b35c6d1b255995484984ec92203b6083be

Grant permissions observed.

Bug: 28760354
Change-Id: Ifdead51f873eb587556309c48fb84ff1542ae303

This fixes the following denies:
type=1400 audit(0.0:4389): avc: denied { read } for path="/data/misc/update_engine/tmp/a_loop_file.W0j9ss" dev="mmcblk0p13" ino=24695 scontext=u:r:kernel:s0 tcontext=u:object_r:update_engine_data_file:s0 tclass=file permissive=0
type=1400 audit(0.0:30): avc: denied { read } for path="/data/nativetest/update_engine_unittests/gen/disk_ext2_unittest.img" dev="mmcblk0p13" ino=71 scontext=u:r:kernel:s0 tcontext=u:object_r:nativetest_data_file:s0 tclass=file permissive=0

Bug: 28319454
Test: setenforce 1 && ./update_engine_unittests

Change-Id: I8d54709d4bda06b364b5420d196d75a4ecc011d3

With sdcardfs, we no longer have a separate sdcardd acting as
an intermediate between the outside world and /data/media.
Unless we modify sdcardfs to change contexts, we need these.
Added for: adbd, kernel, mediaserver, and shell

Remove this patch if sdcardfs is updated to change the
secontext of fs accesses.

Bug: 27915475
Bug: 27937873

Change-Id: I25edcfc7fb8423b3184db84040bda790a1042724

Modify many "neverallow domain" rules to be "neverallow *" rules
instead. This will catch more SELinux policy bugs where a label
is assigned an irrelevant rule, as well as catch situations where
a domain attribute is not assigned to a process.

Change-Id: I5b83a2504c13b384f9dff616a70ca733b648ccdf

In preparation of removing permissions from domain_deprecated.

Addresses:
avc: denied { read } for name="enforce" dev="selinuxfs" ino=4 scontext=u:r:kernel:s0 tcontext=u:object_r:selinuxfs:s0 tclass=file permissive=1
avc: denied { open } for path="/sys/fs/selinux/enforce" dev="selinuxfs" ino=4 scontext=u:r:kernel:s0 tcontext=u:object_r:selinuxfs:s0 tclass=file permissive=1
avc: denied { read } for name="selinux_version" dev="rootfs" ino=4765 scontext=u:r:kernel:s0 tcontext=u:object_r:rootfs:s0 tclass=file permissive=1
avc: denied { open } for path="/selinux_version" dev="rootfs" ino=4765 scontext=u:r:kernel:s0 tcontext=u:object_r:rootfs:s0 tclass=file permissive=1
avc: denied { getattr } for path="/selinux_version" dev="rootfs" ino=4765 scontext=u:r:kernel:s0 tcontext=u:object_r:rootfs:s0 tclass=file permissive=1

Change-Id: I62cbffe85941677283d3b7bf8fc1c437671569a3

auditallow says it's not used.

Bug: 25331459
Change-Id: Ic414efcd0a3be6d744ab66382c20f0ea4c9ea116

Motivation: Domain is overly permissive. Start removing permissions
from domain and assign them to the domain_deprecated attribute.
Domain_deprecated and domain can initially be assigned to all
domains. The goal is to not assign domain_deprecated to new domains
and to start removing domain_deprecated where it is not required or
reassigning the appropriate permissions to the inheriting domain
when necessary.

Bug: 25433265
Change-Id: I8b11cb137df7bdd382629c98d916a73fe276413c

Determine if the following rule can be removed:

allow kernel untrusted_app:fd use

Bug: 25331459
Change-Id: I4ef9f376d7fc1d2bdfba69b2fb3e24d49ac136ad

Address the following denial:
avc: denied { use } for path="/storage/emulated/0/305512.pdf" dev="fuse"
ino=239 scontext=u:r:kernel:s0 tcontext=u:r:priv_app:s0:c512,c768 tclass=fd
permissive=0

Bug: 25068662
Change-Id: Ic29d9569ff387dfd411363db751c3642572c8e85

Addresses the following denials:

  avc:  denied  { write } for  pid=1 comm="init" path=2F6465762F5F5F6B6D73675F5F202864656C6574656429 dev="tmpfs" ino=7214 scontext=u:r:kernel:s0 tcontext=u:object_r:tmpfs:s0 tclass=chr_file permissive=0
  avc:  denied  { write } for  pid=1 comm="init" name="sysrq-trigger" dev="proc" ino=4026534153 scontext=u:r:kernel:s0 tcontext=u:object_r:proc_sysrq:s0 tclass=file permissive=0
  avc:  denied  { sys_boot } for  pid=1 comm="init" capability=22  scontext=u:r:kernel:s0 tcontext=u:r:kernel:s0 tclass=capability permissive=0

(cherrypicked from commit e550e79c)

Change-Id: I46be370d520c4492d97c6ed7ccdc55cc20b22c49

Addresses the following denials:

  avc:  denied  { write } for  pid=1 comm="init" path=2F6465762F5F5F6B6D73675F5F202864656C6574656429 dev="tmpfs" ino=7214 scontext=u:r:kernel:s0 tcontext=u:object_r:tmpfs:s0 tclass=chr_file permissive=0
  avc:  denied  { write } for  pid=1 comm="init" name="sysrq-trigger" dev="proc" ino=4026534153 scontext=u:r:kernel:s0 tcontext=u:object_r:proc_sysrq:s0 tclass=file permissive=0
  avc:  denied  { sys_boot } for  pid=1 comm="init" capability=22  scontext=u:r:kernel:s0 tcontext=u:r:kernel:s0 tclass=capability permissive=0

Change-Id: I46be370d520c4492d97c6ed7ccdc55cc20b22c49

This reverts commit c450759e.

There was nothing wrong with this change originally --- the companion
change in init was broken.

Bug: http://b/19702273
Change-Id: I9d806f6ac251734a61aa90c0741bec7118ea0387

shamu isn't booting.

This reverts commit 46e832f5.

Change-Id: Ib697745a9a1618061bc72f8fddd7ee88c1ac5eca