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master: 77%

Ran 15 Oct 2021 07:29PM UTC

Files 455

Run time 1min

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Committed 15 Oct 2021 07:19PM UTC coverage: 77.509% (+0.007%) from 77.502%

Job # COVERITY_SCAN_TOKEN=[secure] CONFIG="--with-openssl --prefix=/usr --with-tpm2 --enable-test-coverage" TARGET="install" NPROC="nproc"

Build Type

push

travis-ci-com

Committed by

stefanberger

Commit Message

tpm2: Do not write permanent state if only clock changed

To avoid timeouts on short-running commands, such as TPM2_PCR_Extend,
avoid triggering the writing of the permanent state of the TPM 2
if only the clock was updated. So the clock by itself will not cause
the permanent state to be written out anymore but there have to be
other reasons as well.

The state will still be written out upon a TPM2_Shutdown, which is
supposed to be the last command to be sent to the TPM when shutting
down the VM/vTPM. Also, the permanent state will still carry the
latest clock value if it is retrieved via control channel for
VM/VTPM suspend.

The case that may be affected, but is of lesser importance, is the one
where swtpm's volatile state is written to storage using 'swtpm_ioctl -v'
and then swtpm is terminated and restarted (similar to suspend/resume)
and the permanent state file is read from storage but does not contain
the latest clock value. In this case the go.clock will be updated when
the first command after resume is executed.

This fixes the swtpm issue https://github.com/stefanberger/swtpm/issues/597.

Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>

Run Details

29137 of 37592 relevant lines covered (77.51%)

100319.96 hits per line

Source Files on job 2337.2 (COVERITY_SCAN_TOKEN=[secure] CONFIG="--with-openssl --prefix=/usr --with-tpm2 --enable-test-coverage" TARGET="install" NPROC="nproc")

stefanberger / libtpms / 2337 / 2
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master: 77%

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Source Files on job 2337.2 (COVERITY_SCAN_TOKEN=[secure] CONFIG="--with-openssl --prefix=/usr --with-tpm2 --enable-test-coverage" TARGET="install" NPROC="nproc")

stefanberger / libtpms / 2337 / 2
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master: 77%

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