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Message-ID: <CAGXu5j+5rfZ17KcBwMPg6dEnBBVZVvFjv+xZhyThr2rJZ-V0WA@mail.gmail.com>
Date: Wed, 20 Feb 2019 09:00:45 -0800
From: Kees Cook <keescook@...omium.org>
To: Jann Horn <jannh@...gle.com>
Cc: Thomas Gleixner <tglx@...utronix.de>, kernel list <linux-kernel@...r.kernel.org>,
Kernel Hardening <kernel-hardening@...ts.openwall.com>,
"the arch/x86 maintainers" <x86@...nel.org>
Subject: Re: [PATCH] x86/asm: Pin sensitive CR4 bits
On Tue, Feb 19, 2019 at 6:37 PM Jann Horn <jannh@...gle.com> wrote:
>
> On Wed, Feb 20, 2019 at 1:55 AM Kees Cook <keescook@...omium.org> wrote:
> > + if (WARN_ONCE(cr4_pin && (val & cr4_pin) == 0,
>
> Don't you mean `cr4_pin && (val & cr4_pin) != cr4_pin)`?
Whoops! Yes, thanks. :)
--
Kees Cook
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