oss-sec mailing list archives
Re: Some AMD cpus with RDRAND fail to produce random numbers after suspend/resume
From: Peter Kjellström <cap () nsc liu se>
Date: Mon, 20 Jan 2020 11:17:29 +0100
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
Current thread:
- Some AMD cpus with RDRAND fail to produce random numbers after suspend/resume Jeffrey Walton (Jan 16)
- Re: Some AMD cpus with RDRAND fail to produce random numbers after suspend/resume Sven Schwedas (Jan 17)
- Re: Some AMD cpus with RDRAND fail to produce random numbers after suspend/resume Peter Kjellström (Jan 20)