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    Subject[PATCH 4.11 020/115] net/smc: Add warning about remote memory exposure
    Date
    4.11-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Christoph Hellwig <hch@lst.de>


    [ Upstream commit 19a0f7e37c0761a0a1cbf550705a6063c9675223 ]

    The driver explicitly bypasses APIs to register all memory once a
    connection is made, and thus allows remote access to memory.

    Signed-off-by: Christoph Hellwig <hch@lst.de>
    Signed-off-by: Leon Romanovsky <leon@kernel.org>
    Acked-by: Ursula Braun <ubraun@linux.vnet.ibm.com>
    Signed-off-by: David S. Miller <davem@davemloft.net>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    ---
    net/smc/Kconfig | 4 ++++
    1 file changed, 4 insertions(+)

    --- a/net/smc/Kconfig
    +++ b/net/smc/Kconfig
    @@ -8,6 +8,10 @@ config SMC
    The Linux implementation of the SMC-R solution is designed as
    a separate socket family SMC.

    + Warning: SMC will expose all memory for remote reads and writes
    + once a connection is established. Don't enable this option except
    + for tightly controlled lab environment.
    +
    Select this option if you want to run SMC socket applications

    config SMC_DIAG

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