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  • Benjamin Gordon's avatar
    sepolicy: Add rules for non-init namespaces · 9b2e0cbe
    Benjamin Gordon authored 
    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
    9b2e0cbe
logpersist.te 1011 B 
typeattribute logpersist coredomain;

# android debug log storage in logpersist domains (eng and userdebug only)
userdebug_or_eng(`

  r_dir_file(logpersist, cgroup)

  allow logpersist misc_logd_file:file create_file_perms;
  allow logpersist misc_logd_file:dir rw_dir_perms;

  allow logpersist self:global_capability_class_set sys_nice;
  allow logpersist pstorefs:dir search;
  allow logpersist pstorefs:file r_file_perms;

  control_logd(logpersist)
  unix_socket_connect(logpersist, logdr, logd)
  read_runtime_log_tags(logpersist)

')

# logpersist is allowed to write to /data/misc/log for userdebug and eng builds
neverallow logpersist { file_type userdebug_or_eng(`-misc_logd_file -coredump_file') }:file { create write append };
neverallow { domain -init userdebug_or_eng(`-logpersist -logd -dumpstate') } misc_logd_file:file no_rw_file_perms;
neverallow { domain -init userdebug_or_eng(`-logpersist -logd') } misc_logd_file:dir { add_name link relabelfrom remove_name rename reparent rmdir write };