Some file types used as domain entrypoints were missing the
exec_type attribute.  Add it and add a neverallow rule to
keep it that way.

Change-Id: I7563f3e03940a27ae40ed4d6bb74181c26148849
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>

This prevents denials from being generated by the base policy.
Over time, these rules will be incrementally tightened to improve
security.

Change-Id: I4be1c987a5d69ac784a56d42fc2c9063c402de11

/data/security is another location that policy
files can reside. In fact, these policy files
take precedence over their rootfs counterparts
under certain circumstances. Give the appropriate
players the rights to read these policy files.

Change-Id: I9951c808ca97c2e35a9adb717ce5cb98cda24c41

- Remove dac_read_search as it is no longer required by run-as.
- Introduce a separate type for /dev/tty so that we can allow use of own tty for
for a run-as shell without allowing access to other /dev/tty[0-9]* nodes.
- Allow sigchld notifications for death of run-as and its descendants by adbd.
- Drop redundant rules for executing shell or system commands from untrusted_app;
now covered by rules in app.te.

Change-Id: Ic3bf7bee9eeabf9ad4a20f61fbb142a64bb37c6c

/data/security is another location that policy
files can reside. In fact, these policy files
take precedence over their rootfs counterparts
under certain circumstances. Give the appropriate
players the rights to read these policy files.

Change-Id: I9951c808ca97c2e35a9adb717ce5cb98cda24c41

- Remove dac_read_search as it is no longer required by run-as.
- Introduce a separate type for /dev/tty so that we can allow use of own tty for
for a run-as shell without allowing access to other /dev/tty[0-9]* nodes.
- Allow sigchld notifications for death of run-as and its descendants by adbd.
- Drop redundant rules for executing shell or system commands from untrusted_app;
now covered by rules in app.te.

Change-Id: Ic3bf7bee9eeabf9ad4a20f61fbb142a64bb37c6c

Add policy for run-as program and label it in file_contexts.
Drop MLS constraints on local socket checks other than create/relabel
as this interferes with connections with services, in particular for
adb forward.

Change-Id: Ib0c4abeb7cbef559e150a620c45a7c31e0531114
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>