PEFS release 2018.12.29 fixes build issues in FreeBSD 13-CURRENT; workaround for LazyFPU security bug.
PEFS was negatively affected by LazyFPU remediation changes for a two month period in June – July of 2018. FreeBSD kernel issue was discovered by PEFS team and promptly addressed. Workaround was committed on July 19 before official FreeBSD security advisory publication.
Official FreeBSD security advisory FreeBSD-EN-18:08.lazyfpu.asc was published to address the issue:
As a result of fixing the issue described in SA-18:07.lazyfpu, a regression was introduced. FPU state manipulation did not sufficiently prevent context switches potentially allowing partially modified FPU context to be switched out. Upon returning the thread to a running state, stale FPU context could be reloaded.
Additionally, several build fixes were made earlier this year: