netdev - Re: [PATCH bpf] bpf/verifier: disallow pointer subtraction

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Message-ID: <4e8da98b-46a6-32b1-214b-388eaf021f22@iogearbox.net>
Date:   Wed, 12 Sep 2018 23:48:58 +0200
From:   Daniel Borkmann <daniel@...earbox.net>
To:     Alexei Starovoitov <ast@...nel.org>,
        "David S . Miller" <davem@...emloft.net>
Cc:     netdev@...r.kernel.org, kernel-team@...com
Subject: Re: [PATCH bpf] bpf/verifier: disallow pointer subtraction

On 09/12/2018 11:06 PM, Alexei Starovoitov wrote:
> Subtraction of pointers was accidentally allowed for unpriv programs
> by commit 82abbf8d2fc4. Revert that part of commit.
> 
> Fixes: 82abbf8d2fc4 ("bpf: do not allow root to mangle valid pointers")
> Reported-by: Jann Horn <jannh@...gle.com>
> Acked-by: Daniel Borkmann <daniel@...earbox.net>
> Signed-off-by: Alexei Starovoitov <ast@...nel.org>

Applied to bpf, thanks Alexei!