netdev - Re: [for-next 4/6] net/mlx5: FPGA, Add basic support for Innova

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Message-ID: <20170612161746.GC24829@obsidianresearch.com>
Date:   Mon, 12 Jun 2017 10:17:46 -0600
From:   Jason Gunthorpe <jgunthorpe@...idianresearch.com>
To:     Majd Dibbiny <majd@...lanox.com>
Cc:     Doug Ledford <dledford@...hat.com>,
        Saeed Mahameed <saeedm@....mellanox.co.il>,
        Ilan Tayari <ilant@...lanox.com>,
        Alexei Starovoitov <alexei.starovoitov@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-rdma@...r.kernel.org" <linux-rdma@...r.kernel.org>,
        "jsorensen@...com" <jsorensen@...com>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        "linux-fpga@...r.kernel.org" <linux-fpga@...r.kernel.org>,
        Alan Tull <atull@...nsource.altera.com>,
        "yi1.li@...ux.intel.com" <yi1.li@...ux.intel.com>,
        Boris Pismenny <borisp@...lanox.com>
Subject: Re: [for-next 4/6] net/mlx5: FPGA, Add basic support for Innova

On Sat, Jun 10, 2017 at 02:11:13PM +0000, Majd Dibbiny wrote:

> >> This is especially true for mlx nics as there are many raw packet
> >> bypass mechanisms available to userspace.

> All of the Raw packet bypass mechanisms are restricted to
> CAP_NET_RAW, and thus malicious users can't simply open a RAW Packet
> QP and send it to the FPGA..

It is big expansion of CAP_NET_RAW to also basically also include
reconfiguring ipsec xfrm.

Plus, if someone configures ethernet bridging (eg in a VM situation)
then could a hacked VM reconfigure this FPGA?

Jason