Re: [Y2038] [PATCH] timekeeping: Limit system time to prevent 32-bit time_t overflow

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.