netdev - Re: selftests/bpf: test_kmod.sh hangs on all devices

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Message-ID: <CA+G9fYuEFofW=L0cmmAAJGaO4ZvaPYUg=h6XgjAY=PiacXM3JA@mail.gmail.com>
Date:   Mon, 8 Oct 2018 20:25:01 +0530
From:   Naresh Kamboju <naresh.kamboju@...aro.org>
To:     Daniel Borkmann <daniel@...earbox.net>
Cc:     "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@...r.kernel.org>,
        Shuah Khan <shuahkh@....samsung.com>,
        Anders Roxell <anders.roxell@...aro.org>,
        Rafael Tinoco <rafael.tinoco@...aro.org>, ast@...nel.org,
        netdev@...r.kernel.org, songliubraving@...com,
        Willem de Bruijn <willemb@...gle.com>
Subject: Re: selftests/bpf: test_kmod.sh hangs on all devices

Daniel,

On Mon, 8 Oct 2018 at 18:58, Daniel Borkmann <daniel@...earbox.net> wrote:
>
> On 10/08/2018 03:13 PM, Naresh Kamboju wrote:
> > BPF test case test_kmod.sh hangs on all devices running linux next.
> >
> > + cd /opt/kselftests/default-in-kernel/bpf
> > + ./test_kmod.sh
> > sysctl: cannot stat /proc/sys/net/core/bpf_jit_enable: No such file or directory
> > sysctl: cannot stat /proc/sys/net/core/bpf_jit_harden: No such file or directory
> > sysctl: cannot stat /proc/sys/net/core/bpf_jit_enable: No such file or directory
> > sysctl: cannot stat /proc/sys/net/core/bpf_jit_harden: No such file or directory
> > [ JIT enabled:0 hardened:0 ]
> >
> > https://lkft.validation.linaro.org/scheduler/job/429726
> >
> > Test hangs started from 4.19.0-rc4-next-20180918.
> > Linux version 4.19.0-rc4-next-20180918 (oe-user@...host) (gcc version
> > 7.1.1 20170707 (Linaro GCC 7.1-2017.08)) #1 SMP Tue Sep 18 05:26:00
> > UTC 2018
> >
> > History can be compared from this page.
> > https://qa-reports.linaro.org/lkft/linux-next-oe/tests/kselftest/bpf_test_kmod.sh
> >
> > OTOH,
> > There is a kernel BUG,
>
> This is quite an old linux-next kernel, should be fixed by 100811936f89 ("bpf: test_bpf:
> add init_net to dev for flow_dissector"). Please make sure you have that commit included
> in your testing:

I will re-validate on latest code base and let you know.

>
> https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git/commit/?id=100811936f89fd455eda1984810c09003550555b

Thanks for the quick reply.

- Naresh
>
> Thanks,
> Daniel