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List:       oss-security
Subject:    Re: [oss-security] Some AMD cpus with RDRAND fail to produce random numbers after suspend/resume
From:       Peter =?UTF-8?B?S2plbGxzdHLDtm0=?= <cap () nsc ! liu ! se>
Date:       2020-01-20 10:17:29
Message-ID: 20200120111729.7fe9d09b () yaydoe
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On Thu, 16 Jan 2020 23:21:52 -0500
Jeffrey Walton <noloader@gmail.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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