Paul Meyer
afff448cf4
The userspace measurement log carries a sticky-bit marker while a writer is between updating a measurement register and appending the matching record, so that a writer dying in between leaves the log detectably incomplete. However, the next successful writer used to clear the marker again after appending its own record, erasing the evidence that an earlier writer had died and the log is still missing a record. Keep the marker set in that case instead; the new record is appended and synced regardless. The marker likewise stays set if the measurement itself fails, so that any non-clean completion remains flagged: a spurious flag on a failed but harmless measurement is preferable to erasing evidence of a real gap, and PCR replay stays authoritative either way. Finally, warn when systemd-pcrlock loads a marked log, so the resulting PCR validation failures come with a hint at their cause. Signed-off-by: Paul Meyer <katexochen0@gmail.com>
System and Service Manager
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