AMD RDRAND

Germano Massullo germano.massullo at gmail.com
Tue Jan 12 12:07:22 UTC 2021


Il 12/01/21 00:20, Jason A. Donenfeld ha scritto:
> Hi Germano,
>
> I fixed this already, by removing the use of RDRAND from
> get_random_{u32,u64,int,long} entirely:
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=69efea712f5b0489e67d07565aad5c94e09a3e52
>
> This happened almost a year ago back in February, and was backported
> to the stable kernels too, which means you should have no issues
> finding a working kernel for your brand new Ryzen.
>
> Is this actually a problem you're experiencing or is your report
> mostly just speculation based on that systemd issue you linked to?
>
> Jason

Hi Jason, I did not know you already addressed the problem in the Linux
kernel, I just made a quick search in Wireguard mailing list but I did
not find any discussion related to RDRAND
I did not experience the problem (I haven't run proper tests yet), and I
haven't studied yet in detail all new replies in the thread. I just
wanted to let Wireguard developers know about this problem because I
thought it may affect Wireguard




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