netdev - Re: [PATCH V3 net 1/1] smc: switch to usage of IB_PD_UNSAFE_GLOBAL

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Message-Id: <20170516.145308.1101082394249977339.davem@davemloft.net>
Date:   Tue, 16 May 2017 14:53:08 -0400 (EDT)
From:   David Miller <davem@...emloft.net>
To:     ubraun@...ux.vnet.ibm.com
Cc:     hch@....de, netdev@...r.kernel.org, linux-rdma@...r.kernel.org,
        linux-s390@...r.kernel.org, jwi@...ux.vnet.ibm.com,
        schwidefsky@...ibm.com, heiko.carstens@...ibm.com,
        raspl@...ux.vnet.ibm.com
Subject: Re: [PATCH V3 net 1/1] smc: switch to usage of
 IB_PD_UNSAFE_GLOBAL_RKEY

From: Ursula Braun <ubraun@...ux.vnet.ibm.com>
Date: Mon, 15 May 2017 17:33:37 +0200

> Currently, SMC enables remote access to physical memory when a user
> has successfully configured and established an SMC-connection until ten
> minutes after the last SMC connection is closed. Because this is considered
> a security risk, drivers are supposed to use IB_PD_UNSAFE_GLOBAL_RKEY in
> such a case.
> 
> This patch changes the current SMC code to use IB_PD_UNSAFE_GLOBAL_RKEY.
> This improves user awareness, but does not remove the security risk itself.
> 
> Signed-off-by: Ursula Braun <ubraun@...ux.vnet.ibm.com>

Applied.