TPM2.0 error while trying to clear the chip - tpm

Question

I'm discovering the tpm2.0 chip on Ubuntu 17.10. I'm using tpm2-tools package in version 1.1.0. (I have physical chip on my laptop). However when I try to clear the chip I have an error.
$ tpm2_takeownership -c
Clear Failed ! ErrorCode: 0x921
I launched tpmtest too and had few more error.
9 - DICTIONARY ATTACK LOCK RESET TEST
DICTIONARY ATTACK LOCK RESET TEST:
passing case: FAILED! TPM Error: 0x921
16 - POLICY TESTS
POLICY TESTS:
Policy Test: PASSWORD
passing case: PASSED!
passing case: PASSED!
passing case: PASSED!
passing case: PASSED!
passing case: PASSED!
passing case: PASSED!
passing case: FAILED! TPM Error: 0x9a2
24 - QUOTE CONTROL TESTS
QUOTE CONTROL TESTS:
passing case: FAILED! TPM Error: 0x184
I also had a failed test in tpmclient.
$ tpmclient
[...]
STARTUP TESTS:
passing case: PASSED!
passing case: FAILED! TPM Error: 0x100
I checked that resourcemgr service is well activated. I tryed some basics commands over the tpm (tpm2_create, tpm2_load, tpm2_rsaencrypt, tpm2_sign, etc...) and they worked.
Here is the output of tpm2_rc_decode:
$ tpm2_rc_decode 0x921
error layer
hex: 0x0
identifier: TSS2_TPM_ERROR_LEVEL
description: Error produced by the TPM
format 0 warning code
hex: 0x21
name: TPM_RC_LOCKOUT
description: authorizations for objects subject to DA protection are not allowed at this time because the TPM is in DA lockout mode
$ tpm2_rc_decode 0x9a2
error layer
hex: 0x0
identifier: TSS2_TPM_ERROR_LEVEL
description: Error produced by the TPM
format 1 error code
hex: 0x22
identifier: TPM_RC_BAD_AUTH
description: authorization failure without DA implications
session
hex: 0x100
identifier: TPM_RC_1
description: (null)
$ tpm2_rc_decode 0x184
error layer
hex: 0x0
identifier: TSS2_TPM_ERROR_LEVEL
description: Error produced by the TPM
format 1 error code
hex: 0x04
identifier: TPM_RC_VALUE
description: value is out of range or is not correct for the context
handle
hex:0x100
identifier: TPM_RC_1
description: (null)
$ tpm2_rc_decode 0x100
error layer
hex: 0x0
identifier: TSS2_TPM_ERROR_LEVEL
description: Error produced by the TPM
format 0 error code
hex: 0x00
name: TPM_RC_INITIALIZE
description: TPM not initialized
I'm new in tpm technology so I wonder if those errors come from the tpm itself or from the package tpm2-tools. Thank you for your help !

Answer 1

RC = 0x100 is not a 100%-error indeed.
I have a look to tpm2-tss sources. In their integration test that error (and only it) is ignored at test start-up (files: test/integration/main-sapi.c test/integration/main-esapi.c)
Moreover, they describe the error as 'TPM not initialized by TPM2_Startup or already initialized' in their headers. So, the most likely, your error is just an initialization repetition.