netdev - Re: [PATCH bpf] selftests/bpf: test ringbuf mmap read-only and read-write restrictions

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Message-ID: <CAPhsuW7typcvUU+Hot_eCKsXVPru4Sc4q+oVO30=UQx8QBiSHg@mail.gmail.com>
Date:   Fri, 14 May 2021 16:11:36 -0700
From:   Song Liu <song@...nel.org>
To:     Andrii Nakryiko <andrii@...nel.org>
Cc:     bpf <bpf@...r.kernel.org>, Networking <netdev@...r.kernel.org>,
        Alexei Starovoitov <ast@...com>,
        Daniel Borkmann <daniel@...earbox.net>,
        Kernel Team <kernel-team@...com>,
        Thadeu Lima de Souza Cascardo <cascardo@...onical.com>
Subject: Re: [PATCH bpf] selftests/bpf: test ringbuf mmap read-only and
 read-write restrictions

On Fri, May 14, 2021 at 1:11 PM Andrii Nakryiko <andrii@...nel.org> wrote:
>
> Extend ringbuf selftest to validate read/write and read-only restrictions on
> memory mapping consumer/producer/data pages. Ensure no "escalations" from
> PROT_READ to PROT_WRITE/PROT_EXEC is allowed. And test that mremap() fails to
> expand mmap()'ed area.
>
> Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@...onical.com>
> Signed-off-by: Andrii Nakryiko <andrii@...nel.org>

Acked-by: Song Liu <songliubraving@...com>