Bug 246985

Summary:	`newfs -R` is incomplete
Product:	Base System	Reporter:	goatshit54108
Component:	kern	Assignee:	freebsd-bugs (Nobody) <bugs>
Status:	New ---
Severity:	Affects Only Me	CC:	pat, pi
Priority:	---
Version:	Unspecified
Hardware:	Any
OS:	Any

Description goatshit54108 2020-06-04 16:09:55 UTC

`newfs -R` has the purpose of enforcing reproducible output, i.e. to be independent of time or random seeds. However, it is incomplete, because sbput(3) writes a fresh time() sample into the `struct fs` variable: see ffs_sbput() in sys/ufs/ffs/ffs_subr.c.