linux-kernel - Re: [PATCH bpf-next v3 2/6] bpf: Add a ARG_PTR_TO_CONST

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Message-ID: <CAEf4BzZPfqKzE==hBwJvmKawusy_orwR7zLg71AUoH2P11G0=g@mail.gmail.com>
Date:   Tue, 13 Apr 2021 16:03:55 -0700
From:   Andrii Nakryiko <andrii.nakryiko@...il.com>
To:     Florent Revest <revest@...omium.org>
Cc:     bpf <bpf@...r.kernel.org>, Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        Yonghong Song <yhs@...com>, KP Singh <kpsingh@...nel.org>,
        Brendan Jackman <jackmanb@...omium.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH bpf-next v3 2/6] bpf: Add a ARG_PTR_TO_CONST_STR argument type

On Mon, Apr 12, 2021 at 8:38 AM Florent Revest <revest@...omium.org> wrote:
>
> This type provides the guarantee that an argument is going to be a const
> pointer to somewhere in a read-only map value. It also checks that this
> pointer is followed by a zero character before the end of the map value.
>
> Signed-off-by: Florent Revest <revest@...omium.org>
> ---

LGTM.

Acked-by: Andrii Nakryiko <andrii@...nel.org>

>  include/linux/bpf.h   |  1 +
>  kernel/bpf/verifier.c | 41 +++++++++++++++++++++++++++++++++++++++++
>  2 files changed, 42 insertions(+)
>

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