netdev - Re: [PATCH bpf 1/3] bpf: restrict bpf_probe_read{,str}() only to archs where they work

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Message-ID: <CAHk-=wghQ5dr-56J7CrGR10_bAJsWNZvtHcrYnhVh-RvbPjW3Q@mail.gmail.com>
Date:   Thu, 14 May 2020 11:57:54 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Daniel Borkmann <daniel@...earbox.net>
Cc:     Alexei Starovoitov <ast@...nel.org>, bpf@...r.kernel.org,
        Netdev <netdev@...r.kernel.org>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        brendan.d.gregg@...il.com, Christoph Hellwig <hch@....de>,
        john.fastabend@...il.com, yhs@...com
Subject: Re: [PATCH bpf 1/3] bpf: restrict bpf_probe_read{,str}() only to
 archs where they work

On Thu, May 14, 2020 at 9:18 AM Daniel Borkmann <daniel@...earbox.net> wrote:
>
> However, their use should be restricted to archs with non-overlapping
> address ranges where they are working in their current form. Therefore,
> move this behind a CONFIG_ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE and
> have x86, arm64, arm select it (other archs supporting it can follow-up
> on it as well).

Ack, looks sane to me.

               Linus