linux-kernel - Re: [PATCH v2 bpf 2/2] selftests/bpf: add test for freplace program with write access

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Message-ID: <4b521b2a-a431-2ca1-46ab-a6ddba9e65cb@fb.com>
Date:   Thu, 20 Aug 2020 23:19:21 -0700
From:   Yonghong Song <yhs@...com>
To:     Udip Pant <udippant@...com>, Alexei Starovoitov <ast@...nel.org>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>,
        Andrii Nakryiko <andriin@...com>,
        "David S . Miller" <davem@...emloft.net>
CC:     <netdev@...r.kernel.org>, <bpf@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 bpf 2/2] selftests/bpf: add test for freplace program
 with write access



On 8/20/20 5:28 PM, Udip Pant wrote:
> This adds a selftest that tests the behavior when a freplace target program
> attempts to make a write access on a packet. The expectation is that the read or write
> access is granted based on the program type of the linked program and
> not itself (which is of type, for e.g., BPF_PROG_TYPE_EXT).
> 
> This test fails without the associated patch on the verifier.
> 
> Signed-off-by: Udip Pant <udippant@...com>
> ---

Acked-by: Yonghong Song <yhs@...com>