netdev - Re: [PATCH bpf-next v2 3/3] selftests/bpf: add verifier tests for wide stores

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Date:   Mon, 1 Jul 2019 09:55:12 -0700
From:   Andrii Nakryiko <andrii.nakryiko@...il.com>
To:     Stanislav Fomichev <sdf@...gle.com>
Cc:     Networking <netdev@...r.kernel.org>, bpf <bpf@...r.kernel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andriin@...com>, Yonghong Song <yhs@...com>
Subject: Re: [PATCH bpf-next v2 3/3] selftests/bpf: add verifier tests for
 wide stores

On Mon, Jul 1, 2019 at 9:54 AM Stanislav Fomichev <sdf@...gle.com> wrote:
>
> Make sure that wide stores are allowed at proper (aligned) addresses.
> Note that user_ip6 is naturally aligned on 8-byte boundary, so
> correct addresses are user_ip6[0] and user_ip6[2]. msg_src_ip6 is,
> however, aligned on a 4-byte bondary, so only msg_src_ip6[1]
> can be wide-stored.
>
> Cc: Andrii Nakryiko <andriin@...com>
> Cc: Yonghong Song <yhs@...com>
> Signed-off-by: Stanislav Fomichev <sdf@...gle.com>
> ---

Acked-by: Andrii Nakryiko <andriin@...com>

>  tools/testing/selftests/bpf/test_verifier.c   | 17 +++++++--
>  .../selftests/bpf/verifier/wide_store.c       | 36 +++++++++++++++++++
>  2 files changed, 50 insertions(+), 3 deletions(-)
>  create mode 100644 tools/testing/selftests/bpf/verifier/wide_store.c
>

<snip>