linux-kernel - [PATCH =v2 3/3] tpm: selftest: cleanup after unseal with wrong auth/policy test

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Date:   Thu, 12 Dec 2019 09:48:59 -0800
From:   Tadeusz Struk <tadeusz.struk@...el.com>
To:     jarkko.sakkinen@...ux.intel.com
Cc:     tadeusz.struk@...el.com, peterz@...radead.org,
        linux-kernel@...r.kernel.org, jgg@...pe.ca, mingo@...hat.com,
        jeffrin@...agiritech.edu.in, linux-integrity@...r.kernel.org,
        will@...nel.org, peterhuewe@....de
Subject: [PATCH =v2 3/3] tpm: selftest: cleanup after unseal with wrong
 auth/policy test

Unseal with wrong auth or wrong policy test affects DA lockout
and eventually causes the tests to fail with:
"ProtocolError: TPM_RC_LOCKOUT: rc=0x00000921"
when the tests run multiple times.
Send tpm clear command after the test to reset the DA counters.

Signed-off-by: Tadeusz Struk <tadeusz.struk@...el.com>
---
 tools/testing/selftests/tpm2/test_smoke.sh |    5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tools/testing/selftests/tpm2/test_smoke.sh b/tools/testing/selftests/tpm2/test_smoke.sh
index cb54ab637ea6..8155c2ea7ccb 100755
--- a/tools/testing/selftests/tpm2/test_smoke.sh
+++ b/tools/testing/selftests/tpm2/test_smoke.sh
@@ -3,3 +3,8 @@
 
 python -m unittest -v tpm2_tests.SmokeTest
 python -m unittest -v tpm2_tests.AsyncTest
+
+CLEAR_CMD=$(which tpm2_clear)
+if [ -n $CLEAR_CMD ]; then
+	tpm2_clear -T device
+fi