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Date:   Fri, 31 Jul 2020 14:55:03 -0700
From:   John Fastabend <>
To:     Andrii Nakryiko <>,,,,
        Andrii Nakryiko <>
Subject: RE: [PATCH bpf-next] selftests/bpf: fix spurious test failures in
 core_retro selftest

Andrii Nakryiko wrote:
> core_retro selftest uses BPF program that's triggered on sys_enter
> system-wide, but has no protection from some unrelated process doing syscall
> while selftest is running. This leads to occasional test failures with
> unexpected PIDs being returned. Fix that by filtering out all processes that
> are not test_progs process.
> Fixes: fcda189a5133 ("selftests/bpf: Add test relying only on CO-RE and no recent kernel features")
> Signed-off-by: Andrii Nakryiko <>
> ---

Acked-by: John Fastabend <>

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