Version:8350.0.0/ 52.0.2739.0
Seen on tricky.

Traceback (most recent call last):
  File "/usr/local/autotest/client/common_lib/hosts/repair.py", line 281, in _verify_host
    self.verify(host)
  File "/usr/local/autotest/server/hosts/cros_repair.py", line 153, in verify
    'Cannot load the TPM SRK public key')
AutoservVerifyError: Cannot load the TPM SRK public key
05/20 04:43:15.533 ERROR|        base_utils:0269| [stderr] [0520/044314:INFO:update_engine_client.cc(469)] Querying Update Engine status...
05/20 04:43:21.710 ERROR|           control:0030| The host's TPM is available and working
Traceback (most recent call last):
  File "/usr/local/autotest/results/hosts/chromeos4-row2-rack3-host1/848546-provision/20162005043702/control.srv", line 28, in provision_machine
    host.verify()
  File "/usr/local/autotest/server/hosts/cros_host.py", line 1441, in verify
    self._repair_strategy.verify(self)
  File "/usr/local/autotest/client/common_lib/hosts/repair.py", line 626, in verify
    self._verify_root._verify_host(host)
  File "/usr/local/autotest/client/common_lib/hosts/repair.py", line 278, in _verify_host
    self._verify_dependencies(host)
  File "/usr/local/autotest/client/common_lib/hosts/repair.py", line 152, in _verify_dependencies
    self._verify_list(host, self._dependency_list)
  File "/usr/local/autotest/client/common_lib/hosts/repair.py", line 121, in _verify_list
    raise AutoservVerifyDependencyError(*list(failures))
AutoservVerifyDependencyError: The host's TPM is available and working
05/20 04:43:21.714 ERROR|        server_job:0692| Exception escaped control file, job aborting:
Traceback (most recent call last):
  File "/usr/local/autotest/server/server_job.py", line 684, in run
    self._execute_code(server_control_file, namespace)
  File "/usr/local/autotest/server/server_job.py", line 1182, in _execute_code
    execfile(code_file, namespace, namespace)
  File "/usr/local/autotest/results/hosts/chromeos4-row2-rack3-host1/848546-provision/20162005043702/control.srv", line 63, in <module>
    job.parallel_simple(provision_machine, machines)
  File "/usr/local/autotest/server/server_job.py", line 574, in parallel_simple
    return_results=return_results)
  File "/usr/local/autotest/server/subcommand.py", line 93, in parallel_simple
    function(arg)
  File "/usr/local/autotest/results/hosts/chromeos4-row2-rack3-host1/848546-provision/20162005043702/control.srv", line 55, in provision_machine
    raise Exception('')