CQ failure: https://luci-milo.appspot.com/buildbot/chromeos/guado_moblab-paladin/5514

Destroyed the moblab DUT. It is currently in a verify-repair loop.

Provisioning the DUT failed with:

touch: cannot touch '/var/tmp/provision_failed': Read-only file system
Traceback (most recent call last):
  File "/usr/local/autotest/client/common_lib/test.py", line 817, in _call_test_function
    return func(*args, **dargs)
  File "/usr/local/autotest/client/common_lib/test.py", line 470, in execute
    dargs)
  File "/usr/local/autotest/client/common_lib/test.py", line 347, in _call_run_once_with_retry
    postprocess_profiled_run, args, dargs)
  File "/usr/local/autotest/client/common_lib/test.py", line 380, in _call_run_once
    self.run_once(*args, **dargs)
  File "/usr/local/autotest/server/site_tests/provision_AutoUpdate/provision_AutoUpdate.py", line 113, in run_once
    force_full_update=force)
  File "/usr/local/autotest/server/afe_utils.py", line 208, in machine_install_and_update_labels
    image_name, host_attributes = host.machine_install(*args, **dargs)
  File "/usr/local/autotest/server/hosts/cros_host.py", line 862, in machine_install
    self.run('touch %s' % self.PROVISION_FAILED)
  File "/usr/local/autotest/server/hosts/ssh_host.py", line 295, in run
    ssh_failure_retry_ok)
  File "/usr/local/autotest/server/hosts/ssh_host.py", line 252, in _run
    raise error.AutoservRunError("command execution error", result)


Failed provision: https://pantheon.corp.google.com/storage/browser/chromeos-autotest-results/hosts/chromeos2-row1-rack8-host1/421528-provision
Following repair: https://pantheon.corp.google.com/storage/browser/chromeos-autotest-results/hosts/chromeos2-row1-rack8-host1/421530-repair
Following verify: https://pantheon.corp.google.com/storage/browser/chromeos-autotest-results/hosts/chromeos2-row1-rack8-host1/421539-verify
(it's in a verify-repair loop since)

and the job _before_ the failed provision: http://cautotest/afe/#tab_id=view_job&object_id=110315076