linux-kernel - Re: [PATCH v2 5/6] x86/cpu: Remove "noexec"

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:   Tue, 8 Feb 2022 17:40:25 +0000
From:   Sean Christopherson <seanjc@...gle.com>
To:     Kees Cook <keescook@...omium.org>
Cc:     Borislav Petkov <bp@...en8.de>, X86 ML <x86@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Lai Jiangshan <jiangshanlai@...il.com>
Subject: Re: [PATCH v2 5/6] x86/cpu: Remove "noexec"

On Mon, Feb 07, 2022, Kees Cook wrote:
> On Thu, Jan 27, 2022 at 12:56:25PM +0100, Borislav Petkov wrote:
> > From: Borislav Petkov <bp@...e.de>
> > 
> > It doesn't make any sense to disable non-executable mappings -
> > security-wise or else.

Heh, I've actually used noexec relatively recently to triage KVM goofs.  That
said, the same net result can still be achieved via clearcpuid=52, so I've no
objection to removing the dedicated parameter.