Patch "IB/core: For multicast functions, verify that LIDs are multicast LIDs" has been added to the 4.9-stable tree

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

IB/core: For multicast functions, verify that LIDs are multicast LIDs

to the 4.9-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:
ib-core-for-multicast-functions-verify-that-lids-are-multicast-lids.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: "Michael J. Ruhl" <[email protected]>
Date: Sun, 9 Apr 2017 10:15:51 -0700
Subject: IB/core: For multicast functions, verify that LIDs are multicast LIDs

From: Michael J. Ruhl <[email protected]>

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.

---
 drivers/infiniband/core/verbs.c |    8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

@@ -1516,7 +1516,9 @@ int ib_attach_mcast(struct ib_qp *qp, un
 
 	if (!qp->device->attach_mcast)
 		return -ENOSYS;
-	if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD)
+	if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD ||
+	    lid < be16_to_cpu(IB_MULTICAST_LID_BASE) ||
+	    lid == be16_to_cpu(IB_LID_PERMISSIVE))
 		return -EINVAL;
 
 	ret = qp->device->attach_mcast(qp, gid, lid);

@@ -1532,7 +1534,9 @@ int ib_detach_mcast(struct ib_qp *qp, un
 
 	if (!qp->device->detach_mcast)
 		return -ENOSYS;
-	if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD)
+	if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD ||
+	    lid < be16_to_cpu(IB_MULTICAST_LID_BASE) ||
+	    lid == be16_to_cpu(IB_LID_PERMISSIVE))
 		return -EINVAL;
 
 	ret = qp->device->detach_mcast(qp, gid, lid);

Patches currently in stable-queue which might be from [email protected] are

queue-4.9/ib-core-for-multicast-functions-verify-that-lids-are-multicast-lids.patch