Re: [PATCH] timekeeping: Limit system time to prevent 32-bit time_t overflow

[Miroslav Lichvar]

On Fri, Oct 09, 2015 at 12:38:32PM +0200, Thomas Gleixner wrote:
> On Fri, 9 Oct 2015, Miroslav Lichvar wrote:
> > Do you feel the same about preventing the time from reaching
> > KTIME_MAX?
> 
> That's going to happen in ~500 years from now.

At any time if you include accidents and attacks on services with
the CAP_SYS_TIME capability (e.g. NTP/PTP implementations). Even with
32-bit time_t you are not safe, the time can be set forward by any
amount with multiple adjtimex(ADJ_SETOFFSET) calls.

-- 
Miroslav Lichvar
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