+ Cleanups

  - make aa_set_current_onexec return void
  - fix kernel-doc complaints

+ Bug Fixes
  - fix missing error check for rhashtable_insert_fast
  - add missing failure check in compute_xmatch_perms
  - Return directly after a failed kzalloc() in two functions
  - apparmor: fix use of strcpy in policy_unpack_test
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