netdev - Re: [PATCH bpf-next] bpf/verifier: enable ctx + const + 0.

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Message-ID: <20180502045206.6aqm4koawyisgkxr@ast-mbp>
Date:   Tue, 1 May 2018 21:52:07 -0700
From:   Alexei Starovoitov <alexei.starovoitov@...il.com>
To:     William Tu <u9012063@...il.com>
Cc:     Linux Kernel Network Developers <netdev@...r.kernel.org>,
        Yonghong Song <yhs@...com>, Yifeng Sun <pkusunyifeng@...il.com>
Subject: Re: [PATCH bpf-next] bpf/verifier: enable ctx + const + 0.

On Tue, May 01, 2018 at 09:35:29PM -0700, William Tu wrote:
> 
> > How did you test this patch?
> >
> Without the patch, the test case will fail.
> With the patch, the test case passes.

Please test it with real program and you'll see crashes and garbage returned.