linux-kernel - Re: [PATCH bpf v2 1/2] bpf: support PTR_TO_MEM{,_OR

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Message-ID: <CACYkzJ5o7QBR1stFTqxGJv2gbS0qsVKZW6BJ3iBUagy5_S+N0w@mail.gmail.com>
Date:   Wed, 13 Jan 2021 23:29:16 +0100
From:   KP Singh <kpsingh@...nel.org>
To:     Gilad Reti <gilad.reti@...il.com>
Cc:     bpf <bpf@...r.kernel.org>, Yonghong Song <yhs@...com>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>,
        John Fastabend <john.fastabend@...il.com>,
        Shuah Khan <shuah@...nel.org>,
        Networking <netdev@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        linux-kselftest@...r.kernel.org
Subject: Re: [PATCH bpf v2 1/2] bpf: support PTR_TO_MEM{,_OR_NULL} register spilling

On Wed, Jan 13, 2021 at 6:38 AM Gilad Reti <gilad.reti@...il.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@...com>
> Signed-off-by: Gilad Reti <gilad.reti@...il.com>

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