action #123664
os-autoinst does not flush serial console buffer on snapshot reload
Start date:
2023-01-25
Due date:
% Done:
0%
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Description
When tests fail with kernel backtraces, the stale backtrace will be reported again after snapshot reload and trigger bogus failure even when the next test is successful.
Example: https://openqa.suse.de/tests/10371180#step/cve-2017-1000111/13
dmesg log: https://openqa.suse.de/tests/10371180/logfile?filename=serial0.txt
Here, the LTP test cve-2017-18075 triggered kernel warning and failed. But the same kernel warning gets reported again at the end of test cve-2017-1000111 which was successful and the dmesg log does not show any additional backtraces from it.
This appears to be os-autoinst regression because IIRC kernel backtrace detection used to work fine and only reported errors once.
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