linux-kernel - Re: [PATCH bpf-next v6 04/23] selftests/bpf: add test for accessing ctx from syscall program type

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Message-ID: <2b6d2fed-f357-9426-b6fd-cb4864180842@fb.com>
Date:   Fri, 15 Jul 2022 17:17:06 -0700
From:   Yonghong Song <yhs@...com>
To:     Benjamin Tissoires <benjamin.tissoires@...hat.com>,
        Greg KH <gregkh@...uxfoundation.org>,
        Jiri Kosina <jikos@...nel.org>,
        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>,
        KP Singh <kpsingh@...nel.org>, Shuah Khan <shuah@...nel.org>,
        Dave Marchevsky <davemarchevsky@...com>,
        Joe Stringer <joe@...ium.io>, Jonathan Corbet <corbet@....net>
Cc:     Tero Kristo <tero.kristo@...ux.intel.com>,
        linux-kernel@...r.kernel.org, linux-input@...r.kernel.org,
        netdev@...r.kernel.org, bpf@...r.kernel.org,
        linux-kselftest@...r.kernel.org, linux-doc@...r.kernel.org
Subject: Re: [PATCH bpf-next v6 04/23] selftests/bpf: add test for accessing
 ctx from syscall program type



On 7/12/22 7:58 AM, Benjamin Tissoires wrote:
> We need to also export the kfunc set to the syscall program type,
> and then add a couple of eBPF programs that are testing those calls.
> 
> The first one checks for valid access, and the second one is OK
> from a static analysis point of view but fails at run time because
> we are trying to access outside of the allocated memory.
> 
> Signed-off-by: Benjamin Tissoires <benjamin.tissoires@...hat.com>

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