linux-kernel - Re: [PATCH 18/27] bpf: Restrict kernel image access functions when the kernel is locked down

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Message-ID: <19424.1508515402@warthog.procyon.org.uk>
Date:   Fri, 20 Oct 2017 17:03:22 +0100
From:   David Howells <dhowells@...hat.com>
To:     jlee@...e.com
Cc:     dhowells@...hat.com,
        Alexei Starovoitov <alexei.starovoitov@...il.com>,
        linux-security-module@...r.kernel.org, gnomes@...rguk.ukuu.org.uk,
        linux-efi@...r.kernel.org, matthew.garrett@...ula.com,
        gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org,
        jforbes@...hat.com, Daniel Borkmann <daniel@...earbox.net>,
        "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
        Gary Lin <GLin@...e.com>
Subject: Re: [PATCH 18/27] bpf: Restrict kernel image access functions when the kernel is locked down

jlee@...e.com wrote:

> I think that we don't need to lock down sys_bpf() now because
> we didn't lock down other interfaces for reading arbitrary
> address like /dev/mem and /dev/kmem.

Ummm...  See patch 4.  You even gave me a Reviewed-by for it ;-)

David