Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
MIME-Version: 1.0
References: <20210113053810.13518-1-gilad.reti@gmail.com>
In-Reply-To: <20210113053810.13518-1-gilad.reti@gmail.com>
From:   KP Singh <kpsingh@kernel.org>
Date:   Wed, 13 Jan 2021 23:29:16 +0100
Message-ID: <CACYkzJ5o7QBR1stFTqxGJv2gbS0qsVKZW6BJ3iBUagy5_S+N0w@mail.gmail.com>
Subject: Re: [PATCH bpf v2 1/2] bpf: support PTR_TO_MEM{,_OR_NULL} register spilling
To:     Gilad Reti <gilad.reti@gmail.com>
Cc:     bpf <bpf@vger.kernel.org>, Yonghong Song <yhs@fb.com>,
        Alexei Starovoitov <ast@kernel.org>,
        Daniel Borkmann <daniel@iogearbox.net>,
        Andrii Nakryiko <andrii@kernel.org>,
        Martin KaFai Lau <kafai@fb.com>,
        Song Liu <songliubraving@fb.com>,
        John Fastabend <john.fastabend@gmail.com>,
        Shuah Khan <shuah@kernel.org>,
        Networking <netdev@vger.kernel.org>,
        open list <linux-kernel@vger.kernel.org>,
        linux-kselftest@vger.kernel.org
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

On Wed, Jan 13, 2021 at 6:38 AM Gilad Reti <gilad.reti@gmail.com> wrote:
>
> Add support for pointer to mem register spilling, to allow the verifier
> to track pointers to valid memory addresses. Such pointers are returned
> for example by a successful call of the bpf_ringbuf_reserve helper.
>
> The patch was partially contributed by CyberArk Software, Inc.
>
> Fixes: 457f44363a88 ("bpf: Implement BPF ring buffer and verifier support for it")
> Suggested-by: Yonghong Song <yhs@fb.com>
> Signed-off-by: Gilad Reti <gilad.reti@gmail.com>

Acked-by: KP Singh <kpsingh@kernel.org>