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Date:   Thu, 16 Apr 2020 14:36:39 -0700
From:   Alexei Starovoitov <alexei.starovoitov@...il.com>
To:     Paolo Pisati <paolo.pisati@...onical.com>
Cc:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        Andrii Nakryiko <andriin@...com>, bpf@...r.kernel.org,
        linux-kselftest@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: selftests/bpf: test_maps: libbpf: Error loading .BTF into
 kernel: -22. Failed to load SK_SKB verdict prog

On Thu, Apr 09, 2020 at 10:42:23AM +0200, Paolo Pisati wrote:
> test_maps fails consistently on x86-64 5.4.y (5.4.31 and defconfig +
> tools/testing/selftests/bpf/config in this case) and dumps this output:
> 
> ~/linux/tools/testing/selftests/bpf$ sudo ./test_maps
> libbpf: Error loading BTF: Invalid argument(22)
> libbpf: magic: 0xeb9f
> libbpf: Error loading .BTF into kernel: -22.
> libbpf: Error loading BTF: Invalid argument(22)
> libbpf: magic: 0xeb9f
> 
> libbpf: Error loading .BTF into kernel: -22.
> Failed to load SK_SKB verdict prog

I've been trying to reproduce on the latest bpf tree and couldn't.
Does it reproduce for you on the latest?

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