kernel-packages team mailing list archive

[John Johansen <john.johansen@xxxxxxxxxxxxx>]

This is not an issue. It is working as designed and is necessary to open
up the file for the stacking work.

This patch should be reverted immediately as it opens up a policy
introspection hole.

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https://bugs.launchpad.net/bugs/1560583

Title:
  reading /sys/kernel/security/apparmor/profiles requires CAP_MAC_ADMIN

Status in linux package in Ubuntu:
  Fix Committed
Status in linux source package in Xenial:
  Fix Committed

Bug description:
  $ cat ./t
  #include <tunables/global>

  profile t {
     #include <abstractions/base>
     /bin/cat ixr,
     /sys/kernel/security/apparmor/profiles r,
  }

  $ sudo apparmor_parser -r ./t
  $ sudo aa-exec -p t -- cat /sys/kernel/security/apparmor/profiles 
  cat: /sys/kernel/security/apparmor/profiles: Permission denied
  [1]

  kernel: [   62.203035] audit: type=1400 audit(1458665428.726:128):
  apparmor="DENIED" operation="capable" profile="t" pid=3683 comm="cat"
  capability=33  capname="mac_admin"

  This is new in the -15 kernel.

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