OpenStack Compute (nova)

  1. Bug #1996188
  2. Comment #3

Comment 3 for bug 1996188

Revision history for this message
Guillaume Espanel (guillaume-espanel) wrote : Re: Arbitrary file access through custom VMDK flat descriptor

About qcow2:

It seems that nova refuses to convert qcow2 images that have a backing file, at least here:
https://opendev.org/openstack/nova/src/commit/c97507dfcd57cce9d76670d3b0d48538900c00e9/nova/virt/images.py#L127

Same for cinder: https://opendev.org/openstack/cinder/src/commit/dcec2f6f01ffc63dc058f641370e9f5a0bad07e4/cinder/image/image_utils.py#L659

I think glance also rejects qcow2 that have backing files:
https://opendev.org/openstack/glance/src/branch/master/glance/async_/flows/base_import.py#L178
but I am not sure that's the case everywhere.