linux-kernel - Re: [PATCH] x86/cpu, x86/pti: Do not enable PTI on AMD processors

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>] [day] [month] [year] [list]

Message-ID: <5A4D3126.11790.FCAAD77A@tim.ml.ipcopper.com>
Date:   Wed, 03 Jan 2018 11:38:14 -0800
From:   "Tim Mouraveiko" <tim.ml@...opper.com>
To:     linux-kernel@...r.kernel.org
Subject: Re: [PATCH] x86/cpu, x86/pti: Do not enable PTI on AMD processors

On 12/26/2017 09:43 PM, Tom Lendacky wrote:
>AMD processors are not subject to the types of attacks that the kernel page table isolation 
feature protects against.

There is no doubt this is a serious flaw. This thread reminded me - about a year ago we 
discovered a software code that bricked an Intel CPU. The software code was executed and 
the processor seized. The Motherboard was reset via the reset button, but the processor 
never came back. It was rather dead - the CPU did not even draw any power. We contacted 
Intel and one of their personnel suggested that they were aware of it. I never quite 
understood if it was a processor feature or a flaw.

Tim