Date: Wed, 7 Apr 1999 09:36:57 -0700 (PDT) From: Nick Sayer <nsayer@FreeBSD.org> To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/kern kern_time.c Message-ID: <199904071636.JAA15238@freefall.freebsd.org>
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nsayer 1999/04/07 09:36:57 PDT
Modified files:
sys/kern kern_time.c
Log:
If securelevel>1, allow the clock to be adjusted negatively only up to
1 second prior to the highest the clock has run so far. This allows
time adjusters like xntpd to do their work, but the worst a miscreant
can do is "freeze" the clock, not go back in time.
We still need to decide on an algorithm to clamp positive adjustments.
As it stands, it is possible to achieve arbitrary negative adjustments
by "wrapping" time around.
PR: 10361
Revision Changes Path
1.62 +27 -8 src/sys/kern/kern_time.c
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