netdev - Re: WARNING net/core/stream.c:208 when running test

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Message-ID: <CAM_iQpUdbsf97g8X=K7wKnGu1mmfuu7bseHdtaQ_uvo1XOmG_A@mail.gmail.com>
Date:   Wed, 7 Apr 2021 16:14:27 -0700
From:   Cong Wang <xiyou.wangcong@...il.com>
To:     Jiri Olsa <jolsa@...hat.com>
Cc:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andriin@...com>,
        Paolo Abeni <pabeni@...hat.com>, bpf <bpf@...r.kernel.org>,
        Linux Kernel Network Developers <netdev@...r.kernel.org>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...omium.org>,
        Toke Høiland-Jørgensen <toke@...hat.com>,
        Jiri Olsa <jolsa@...nel.org>, Jiri Benc <jbenc@...hat.com>,
        Yauheni Kaliuta <yauheni.kaliuta@...hat.com>
Subject: Re: WARNING net/core/stream.c:208 when running test_sockmap

On Wed, Apr 7, 2021 at 2:22 PM Jiri Olsa <jolsa@...hat.com> wrote:
>
> hi,
> I'm getting couple of WARNINGs below when running
> test_sockmap on latest bpf-next/master, like:
>
>   # while :; do ./test_sockmap ; done
>
> The warning is at:
>   WARN_ON(sk->sk_forward_alloc);
>
> so looks like some socket allocation math goes wrong.

This one should be fixed by:
https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=144748eb0c445091466c9b741ebd0bfcc5914f3d

So please try the latest bpf branch.

Thanks.