From: Christoph Hellwig <hch@lst.de>
Date: Tue, 16 May 2017 06:51:38 +0000 (+0300)
Subject: net/smc: Add warning about remote memory exposure
X-Git-Tag: MMI-PSA29.97-13-9~5573^2~21
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=19a0f7e37c0761a0a1cbf550705a6063c9675223;p=GitHub%2FMotorolaMobilityLLC%2Fkernel-slsi.git

net/smc: Add warning about remote memory exposure

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>
---

diff --git a/net/smc/Kconfig b/net/smc/Kconfig
index c717ef0896aa..33954852f3f8 100644
--- 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