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Date:   Wed, 3 Apr 2019 16:52:40 +0100
From:   Edward Cree <>
To:     Daniel Borkmann <>,
        Paul Chaignon <>,
        Alexei Starovoitov <>, <>,
CC:     Xiao Han <>, <>,
        "Martin KaFai Lau" <>,
        Song Liu <>, Yonghong Song <>
Subject: Re: [PATCH bpf] bpf: report verifier bugs as warnings

On 02/04/2019 15:37, Daniel Borkmann wrote:
> If we really want to have a kernel warn, then lets add a
> helper macro verbose_and_warn(...) which will trigger a one-time warning, but keeps
> the verbose log intact as well.

Any time the verifier detects that its internal invariants have been broken,
 logging a warning is the right thing to do, just like any other part of the

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