linux-kernel - Re: [PATCH 00/29] x86: Kernel IBT

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Message-ID: <420C3057-8359-4303-9E25-0C25FAB9203B@chromium.org>
Date:   Tue, 22 Feb 2022 23:26:57 -0800
From:   Kees Cook <keescook@...omium.org>
To:     "Edgecombe, Rick P" <rick.p.edgecombe@...el.com>,
        "Poimboe, Josh" <jpoimboe@...hat.com>,
        "peterz@...radead.org" <peterz@...radead.org>,
        "hjl.tools@...il.com" <hjl.tools@...il.com>,
        "x86@...nel.org" <x86@...nel.org>,
        "joao@...rdrivepizza.com" <joao@...rdrivepizza.com>,
        "Cooper, Andrew" <andrew.cooper3@...rix.com>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "samitolvanen@...gle.com" <samitolvanen@...gle.com>,
        "ndesaulniers@...gle.com" <ndesaulniers@...gle.com>,
        "Milburn, Alyssa" <alyssa.milburn@...el.com>
Subject: Re: [PATCH 00/29] x86: Kernel IBT


On Fri, 2022-02-18 at 17:49 +0100, Peter Zijlstra wrote:
> This is an (almost!) complete Kernel IBT implementation. 

BTW, I've successfully tested this on what /proc/cpuinfo calls an "11th Gen Intel(R) Core(TM) i7-1165G7 @ 2.80GHz" (in a Lenovo "Yoga 7 15ITL5"). Normal laptop-y things all seem happy and it correctly blows up on a new LKDTM test I'll send out tomorrow.

So, even though the series is young and has some TODOs still:

Tested-by: Kees Cook <keescook@...omium.org>

One thought: should there be a note in dmesg about it being active? The only way to see it is finding "ibt" in cpuinfo...

-Kees

-- 
Kees Cook