[Bug 2085851] Re: Jammy package 2:20.3.1-0ubuntu1.4 is missing the upstream privsep pieces

[James Page]

This will impact noble as well as it has the older version of the patch.

** Changed in: cinder (Ubuntu Jammy)
       Status: New => Triaged

** Changed in: cinder (Ubuntu Noble)
       Status: New => Triaged

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https://bugs.launchpad.net/bugs/2085851

Title:
  Jammy package 2:20.3.1-0ubuntu1.4 is missing the upstream privsep
  pieces

Status in cinder package in Ubuntu:
  Invalid
Status in cinder source package in Jammy:
  Triaged
Status in cinder source package in Noble:
  Triaged

Bug description:
  Ubuntu Jammy cinder package version 2:20.3.1-0ubuntu1.4 [1] backported fix [2] for the LP#2059809 [3] (the CVE-2024-32498 fix).
  The upstream fix [2] calls the `format_inspector.detect_file_format` with the eleviated previlages [4], however the code in the Ubuntu package does not [5]. Instead it calls the `format_inspector.detect_file_format` without using privsep. That is causing the following error when creating qcow image from volume (using purestorage driver):
  2024-10-28 09:45:28.849 2007342 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3/dist-packages/cinder/volume/manager.py", line 1744, in copy_volume_to_image
  2024-10-28 09:45:28.849 2007342 ERROR oslo_messaging.rpc.server     self.driver.copy_volume_to_image(context, volume,
  2024-10-28 09:45:28.849 2007342 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3/dist-packages/cinder/volume/driver.py", line 919, in copy_volume_to_image
  2024-10-28 09:45:28.849 2007342 ERROR oslo_messaging.rpc.server     volume_utils.upload_volume(context,
  2024-10-28 09:45:28.849 2007342 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3/dist-packages/cinder/volume/volume_utils.py", line 1341, in upload_volume
  2024-10-28 09:45:28.849 2007342 ERROR oslo_messaging.rpc.server     image_utils.upload_volume(context, image_service, image_meta, volume_path,
  2024-10-28 09:45:28.849 2007342 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3/dist-packages/cinder/image/image_utils.py", line 1083, in upload_volume
  2024-10-28 09:45:28.849 2007342 ERROR oslo_messaging.rpc.server     data = qemu_img_info(volume_path, run_as_root=run_as_root)
  2024-10-28 09:45:28.849 2007342 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3/dist-packages/cinder/image/image_utils.py", line 164, in qemu_img_info
  2024-10-28 09:45:28.849 2007342 ERROR oslo_messaging.rpc.server     inspector = format_inspector.detect_file_format(path)
  2024-10-28 09:45:28.849 2007342 ERROR oslo_messaging.rpc.server   File "/usr/lib/python3/dist-packages/cinder/image/format_inspector.py", line 921, in detect_file_format
  2024-10-28 09:45:28.849 2007342 ERROR oslo_messaging.rpc.server     with open(filename, 'rb') as f:
  2024-10-28 09:45:28.849 2007342 ERROR oslo_messaging.rpc.server PermissionError: [Errno 13] Permission denied: '/dev/dm-0'

  [1] https://launchpad.net/ubuntu/+source/cinder/2:20.3.1-0ubuntu1.4
  [2] https://review.opendev.org/c/openstack/cinder/+/923873
  [3] https://launchpad.net/bugs/2059809
  [4] https://review.opendev.org/c/openstack/cinder/+/923873/9/cinder/image/image_utils.py#164
  [5] https://launchpadlibrarian.net/737789879/cinder_2%3A20.2.0-0ubuntu1.1_2%3A20.3.1-0ubuntu1.4.diff.gz

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