netdev - Re: [PATCH bpf] bpf: prevent out-of-bounds speculation

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Message-ID: <8db828ea-d395-96ab-3131-6b82213a06ab@fb.com>
Date:   Wed, 10 Jan 2018 14:29:58 -0800
From:   Alexei Starovoitov <ast@...com>
To:     Will Deacon <will.deacon@....com>,
        Linus Torvalds <torvalds@...ux-foundation.org>
CC:     Mark Rutland <mark.rutland@....com>,
        "David S . Miller" <davem@...emloft.net>,
        Daniel Borkmann <daniel@...earbox.net>,
        Jann Horn <jannh@...gle.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Elena Reshetova <elena.reshetova@...el.com>,
        Alan Cox <alan@...ux.intel.com>,
        Network Development <netdev@...r.kernel.org>,
        kernel-team <kernel-team@...com>
Subject: Re: [PATCH bpf] bpf: prevent out-of-bounds speculation

On 1/10/18 11:47 AM, Will Deacon wrote:
> Hi again Linus, Alexei,
>
> I can happily confirm that there aren't any (ARM architecture) CPUs where
> the masking approach is not sufficient, so there's no need to worry about
> value speculation breaking this.

Awesome! Thank you for confirming.