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[Thierry Carrez <thierry.carrez+lp@xxxxxxxxx>]

** Changed in: cinder
       Status: Fix Committed => Fix Released

** Changed in: cinder
    Milestone: None => grizzly-3

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https://bugs.launchpad.net/bugs/1100363

Title:
  NULs should be persisted when securely clearing volumes

Status in Cinder:
  Fix Released
Status in OpenStack Compute (Nova):
  Fix Released

Bug description:
  Currently O_DIRECT is _not_ used when copying from /dev/zero                         
  and there are issues with enabling that (see 444cd542).                         
  That leaves the possibility that data in the write cache
  may be flushed if the device is unprovisioned.

  Given that this only affects data towards the end of a device,
  and that it may only be significant on shared storage systems,
  I'm not sure how much of an issue this is in practise.
  Nevertheless I've marked this bug as security sensitive for now.

  Note the same issue impacts nova and cinder.

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