[PATCH 5.10 294/390] selftest: tpm2: Add Client.__del__() to close /dev/tpm* handle

From: Greg Kroah-Hartman
Date: Mon Oct 24 2022 - 09:26:32 EST


From: Stefan Berger <stefanb@xxxxxxxxxxxxx>

[ Upstream commit 2d869f0b458547386fbcd8cf3004b271b7347b7f ]

The following output can bee seen when the test is executed:

test_flush_context (tpm2_tests.SpaceTest) ... \
/usr/lib64/python3.6/unittest/case.py:605: ResourceWarning: \
unclosed file <_io.FileIO name='/dev/tpmrm0' mode='rb+' closefd=True>

An instance of Client does not implicitly close /dev/tpm* handle, once it
gets destroyed. Close the file handle in the class destructor
Client.__del__().

Fixes: 6ea3dfe1e0732 ("selftests: add TPM 2.0 tests")
Cc: Shuah Khan <shuah@xxxxxxxxxx>
Cc: linux-kselftest@xxxxxxxxxxxxxxx
Cc: Jarkko Sakkinen <jarkko@xxxxxxxxxx>
Signed-off-by: Stefan Berger <stefanb@xxxxxxxxxxxxx>
Reviewed-by: Jarkko Sakkinen <jarkko@xxxxxxxxxx>
Signed-off-by: Jarkko Sakkinen <jarkko@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
tools/testing/selftests/tpm2/tpm2.py | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/tools/testing/selftests/tpm2/tpm2.py b/tools/testing/selftests/tpm2/tpm2.py
index f34486cd7342..3e67fdb518ec 100644
--- a/tools/testing/selftests/tpm2/tpm2.py
+++ b/tools/testing/selftests/tpm2/tpm2.py
@@ -370,6 +370,10 @@ class Client:
fcntl.fcntl(self.tpm, fcntl.F_SETFL, flags)
self.tpm_poll = select.poll()

+ def __del__(self):
+ if self.tpm:
+ self.tpm.close()
+
def close(self):
self.tpm.close()

--
2.35.1