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The IMA policy file does not implement read. Trying to just open/read/close the file will load a blank policy and you cannot then change the policy without a reboot. This removes the read permission from the file so one must at least be attempting to write... Signed-off-by: Eric Paris <eparis@redhat.com> Acked-by: Mimi Zohar <zohar@us.ibm.com> Signed-off-by: James Morris <jmorris@namei.org>