Date: Mon, 20 Jan 2020 11:17:29 +0100 From: Peter Kjellström <cap@....liu.se> To: Jeffrey Walton <noloader@...il.com> Cc: oss-security@...ts.openwall.com Subject: Re: Some AMD cpus with RDRAND fail to produce random numbers after suspend/resume On Thu, 16 Jan 2020 23:21:52 -0500 Jeffrey Walton <noloader@...il.com> wrote: > This just made my radar. It appears some AMD cpus with RDRAND fail to > produce random numbers after a suspend/resume. It looks like it was > first reported in 2014 or so. Note that there are, afaict, two distict AMD RDRAND issues discussed here. The original 2014 suspend/resume one and the more recent, "ryzen 3000 just returnx 0xffffffff". The latter is probably the reason for the renewed focus on this... /Peter
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