linux-kernel - Re: [PATCH v4 07/10] x86: narrow out of bounds syscalls to sys

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Message-ID: <CA+55aFziKW3=R4erPJ_35JbWv5P02qqqnmS8zDR1mn=+M-YXQw@mail.gmail.com>
Date:   Tue, 6 Feb 2018 12:43:19 -0800
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Dan Williams <dan.j.williams@...el.com>
Cc:     Luis Henriques <lhenriques@...e.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-arch <linux-arch@...r.kernel.org>,
        Kernel Hardening <kernel-hardening@...ts.openwall.com>,
        Greg KH <gregkh@...uxfoundation.org>, X86 ML <x86@...nel.org>,
        Ingo Molnar <mingo@...hat.com>,
        Andy Lutomirski <luto@...nel.org>,
        "H. Peter Anvin" <hpa@...or.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Alan Cox <alan@...ux.intel.com>
Subject: Re: [PATCH v4 07/10] x86: narrow out of bounds syscalls to sys_read
 under speculation

On Tue, Feb 6, 2018 at 12:42 PM, Linus Torvalds
<torvalds@...ux-foundation.org> wrote:
>
> Sadly, that is *very* easy to miscompile.

Side note: don't read email, go watch the falcon heavy takeoff.

              Linus