netdev - Re: [PATCH bpf] Revert "bpf: program: Refuse non-O_RDWR flags in BPF_OBJ

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Message-ID: <CACAyw99k4ZhePBcRJzJn37rvGKnPHEgE3z8Y-47iYKQO2nqFpQ@mail.gmail.com>
Date:   Fri, 18 Jun 2021 12:55:15 +0100
From:   Lorenz Bauer <lmb@...udflare.com>
To:     Maciej Żenczykowski <zenczykowski@...il.com>
Cc:     Maciej Żenczykowski <maze@...gle.com>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Linux Network Development Mailing List 
        <netdev@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        BPF Mailing List <bpf@...r.kernel.org>,
        "David S . Miller" <davem@...emloft.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        Greg Kroah-Hartman <gregkh@...gle.com>
Subject: Re: [PATCH bpf] Revert "bpf: program: Refuse non-O_RDWR flags in BPF_OBJ_GET"

On Fri, 18 Jun 2021 at 11:55, Maciej Żenczykowski
<zenczykowski@...il.com> wrote:
>
> This reverts commit d37300ed182131f1757895a62e556332857417e5.
>
> This breaks Android userspace which expects to be able to
> fetch programs with just read permissions.

Sorry about this! I'll defer to the maintainers what to do here.
Reverting leaves us with a gaping hole for access control of pinned
programs.

-- 
Lorenz Bauer  |  Systems Engineer
6th Floor, County Hall/The Riverside Building, SE1 7PB, UK

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