ubuntu_zfs_smoke_test's kernel-smoke-test-encrypt fails on j:fips

[Magali Lemes do Sacramento]

The test is failing on j:fips 5.15.0-102.112+fips1 and j:azure-fips 5.15.0-1060.69+fips1 in the 2024.03.04 SRU cycle in all arches we support.

In the previous s2024.02.05 cycle, the tests passed. However, I did a quick test with the j:fips kernel from the previous cycle and this same test also failed, which could be an indicator that this is now failing due to some userspace change, but that is yet to be confirmed.

We have the following output:

  * Command:
      /home/ubuntu/autotest/client/tests/ubuntu_zfs_smoke_test/kernel-smoke-
      test-encrypt /home/ubuntu/autotest/client/tmp/ubuntu_zfs_smoke_test/src
  Exit status: 1
  Duration: 1.6928191185

  stdout:
  Testing kernel driver 20105 with zfsutils 2.1.5-1ubuntu6~22.04.3
  VDEVs in /home/ubuntu/autotest/client/tmp/ubuntu_zfs_smoke_test/src
  [...]
  kernel smoke test, create and destroy ZFS encrypted filesystem using aes-128-ccm with 1000000 pbkdf2iters: FAILED
  zfs create aes-128-ccm passphrase encrypted filesystem failed, exit code=1
  stderr:
  cannot create 'pool-smoke-23420/fs-aes-128-ccm-pbkdf2iters': Failed to generate key from passphrase.

[Po-Hsu Lin (cypressyew)]

This is affecting other Jammy FIPS variants like J-azure-fips-5.15.0-1060.69+fips1, J-gcp-fips-5.15.0-1055.63+fips2 as well.