From 258132a3ab98637570e7961fe29cdcad408a7912 Mon Sep 17 00:00:00 2001
From: "Michael J. Ruhl" <michael.j.ruhl@intel.com>
Date: Sun, 9 Apr 2017 10:15:51 -0700
Subject: [PATCH] IB/core: For multicast functions, verify that LIDs are
 multicast LIDs

commit 8561eae60ff9417a50fa1fb2b83ae950dc5c1e21 upstream.

The Infiniband spec defines "A multicast address is defined by a
MGID and a MLID" (section 10.5).  Currently the MLID value is not
validated.

Add check to verify that the MLID value is in the correct address
range.

Fixes: 0c33aeedb2cf ("[IB] Add checks to multicast attach and detach")
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Dasaratharaman Chandramouli <dasaratharaman.chandramouli@intel.com>
Signed-off-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
[bwh: Backported to 3.2: use literal number instead of IB_MULTICAST_LID_BASE]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
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