linux-kernel - Re: Bricked x86 CPU with software?

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Sat, 6 Jan 2018 17:50:27 +0200
From:   Nikolay Borisov <n.borisov.lkml@...il.com>
To:     Tim Mouraveiko <tim.ml@...opper.com>, linux-kernel@...r.kernel.org
Subject: Re: Bricked x86 CPU with software?



On  4.01.2018 02:47, Tim Mouraveiko wrote:
> Hi,
> 
> In all my years of extensive experience writing drivers and kernels, I never came across a situation 
> where you could brick an x86 CPU. Not until recently, when I was working on debugging a piece of 
> code and I bricked an Intel CPU. I am not talking about an experimental motherboard or anything 
> exotic or an electrical issue where the CPU got fried, but before the software code execution the CPU 
> was fine and then it´s dead. There were signs that something was not right, that the code was causing 
> unusual behavior, which is what I was debugging.
> 
> Has anyone else ever experienced a bricked CPU after executing software code? I just wanted to get 
> input from the community to see if anyone had had any experience like that, since it seems rather 
> unusual to me.
> 
> Tim
> 

"Code talks, bullshit walks". Unless you share the code I don't think
anyone has any reason to believe anything you said.