Patch "net/smc: Add warning about remote memory exposure" has been added to the 4.11-stable tree

Patch "net/smc: Add warning about remote memory exposure" has been added to the 4.11-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    net/smc: Add warning about remote memory exposure

to the 4.11-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     net-smc-add-warning-about-remote-memory-exposure.patch
and it can be found in the queue-4.11 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Wed May 31 09:13:10 JST 2017
From: Christoph Hellwig <hch@lst.de>
Date: Tue, 16 May 2017 09:51:38 +0300
Subject: net/smc: Add warning about remote memory exposure

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


Patches currently in stable-queue which might be from hch@lst.de are

queue-4.11/net-smc-add-warning-about-remote-memory-exposure.patch