Re: [PATCH] tests: Wait for migration completion on destination QEMU to avoid failures

["Daniel P. Berrangé" <berrange@redhat.com>]

On Wed, Oct 16, 2024 at 11:21:59AM -0400, Stefan Berger wrote:
> Rather than waiting for the completion of migration on the source side,
> wait for it on the destination QEMU side to avoid accessing the TPM TIS
> memory mapped registers before QEMU could restore their state. This
> error condition could be triggered on busy systems where the destination
> QEMU did not have enough time to restore the TIS state while the test case
> was already reading its registers. The test case was for example reading
> the STS register and received an unexpected value (0xffffffff), which
> lead to a segmentation fault later on due to trying to read 0xffff bytes
> from the TIS into a buffer.
> 
> Cc: qemu-stable@nongnu.org
> Reported-by: Fabiano Rosas <farosas@suse.de>
> Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
> ---
>  tests/qtest/tpm-tests.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>


With regards,
Daniel
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