Date: Sun, 21 Dec 2014 12:50:07 -0500 From: Daniel Micay <danielmicay@...il.com> To: oss-security@...ts.openwall.com Subject: Re: can we talk about secure time? On 21/12/14 06:31 AM, Florian Weimer wrote: > > In contrast, servers with long-running connections and I/O polling > loops often do not react gracefully to jumps in time. (I once > disconnected a few hundreds, if not thousands of users from an IRC > server just by setting its time correctly.) Sure, you can avoid that > by using the appropriate kernel clock for timeout handling, but I have > the impression that the correct clock changes every couple of years. I don't think it has ever changed. CLOCK_MONOTONIC won't *ever* jump either forwards or backwards, but is impacted by clock skew. I don't think most use cases actually want CLOCK_MONOTONIC_RAW, especially considering that there's no vdso implementation so it's slow. Of course, there's lots of buggy software which is why we have stuff like ASLR / SSP in the first place. :) Download attachment "signature.asc" of type "application/pgp-signature" (820 bytes)
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