From: Sean Christopherson <seanjc@google.com>
To: Kees Cook <keescook@chromium.org>
Cc: Borislav Petkov <bp@alien8.de>, X86 ML <x86@kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
Lai Jiangshan <jiangshanlai@gmail.com>
Subject: Re: [PATCH v2 5/6] x86/cpu: Remove "noexec"
Date: Tue, 8 Feb 2022 17:40:25 +0000 [thread overview]
Message-ID: <YgKrCZkiU3X2OV6b@google.com> (raw)
In-Reply-To: <202202071419.E21C67553@keescook>
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@suse.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.
next prev parent reply other threads:[~2022-02-08 17:40 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-27 11:56 [PATCH v2 0/6] x86/cpu: Do some janitorial work Borislav Petkov
2022-01-27 11:56 ` [PATCH v2 1/6] x86/cpu: Allow feature bit names from /proc/cpuinfo in clearcpuid= Borislav Petkov
2022-02-07 22:04 ` Kees Cook
2022-02-08 11:54 ` Borislav Petkov
2022-04-04 18:22 ` [tip: x86/cpu] " tip-bot2 for Borislav Petkov
2022-01-27 11:56 ` [PATCH v2 2/6] x86/cpu: Remove "nosep" Borislav Petkov
2022-02-07 21:58 ` Kees Cook
2022-04-04 18:22 ` [tip: x86/cpu] " tip-bot2 for Borislav Petkov
2022-01-27 11:56 ` [PATCH v2 3/6] x86/cpu: Remove CONFIG_X86_SMAP and "nosmap" Borislav Petkov
2022-02-07 22:07 ` Kees Cook
2022-02-08 15:06 ` Borislav Petkov
2022-02-08 21:01 ` Borislav Petkov
2022-02-09 2:56 ` Kees Cook
2022-02-09 11:53 ` Borislav Petkov
2022-04-04 18:22 ` [tip: x86/cpu] " tip-bot2 for Borislav Petkov
2022-01-27 11:56 ` [PATCH v2 4/6] x86/cpu: Remove "nosmep" Borislav Petkov
2022-02-07 22:07 ` Kees Cook
2022-04-04 18:22 ` [tip: x86/cpu] " tip-bot2 for Borislav Petkov
2022-01-27 11:56 ` [PATCH v2 5/6] x86/cpu: Remove "noexec" Borislav Petkov
2022-02-07 22:25 ` Kees Cook
2022-02-08 17:40 ` Sean Christopherson [this message]
2022-02-08 19:56 ` Borislav Petkov
2022-04-04 18:22 ` [tip: x86/cpu] " tip-bot2 for Borislav Petkov
2022-01-27 11:56 ` [PATCH v2 6/6] x86/cpu: Remove "noclflush" Borislav Petkov
2022-02-07 22:08 ` Kees Cook
2022-04-04 18:22 ` [tip: x86/cpu] " tip-bot2 for Borislav Petkov
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