CVSROOT: /cvs
Module name: src
Changes by: [email protected] 2019/01/30 22:00:19
Modified files:
sys/kern : kern_tc.c
Log message:
tc_setclock: Don't rewind the system uptime during resume/unhibernate.
When we come back from suspend/hibernate the BIOS/firmware/whatever can
hand us *any* TOD, so we need to check that the given TOD doesn't set our
boot offset backwards, breaking the monotonicity of e.g. CLOCK_MONOTONIC.
This is trivial to do from the BIOS on most PCs before unhibernating.
There might be other ways it can happen, accidentally or otherwise.
This is a bit messy but it can be made prettier later with a "bintimecmp"
macro or something like that.
Problem confirmed by jmatthew@.
"you are very likely right" deraadt@
