Patch "RDMA/uverbs: Fix the check for port number" 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

    RDMA/uverbs: Fix the check for port number

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:
     rdma-uverbs-fix-the-check-for-port-number.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 [off-list ref] know about it.

From 5a7a88f1b488e4ee49eb3d5b82612d4d9ffdf2c3 Mon Sep 17 00:00:00 2001

From: "Ismail, Mustafa" <redacted>
Date: Fri, 14 Jul 2017 09:41:30 -0500
Subject: RDMA/uverbs: Fix the check for port number

From: Ismail, Mustafa <redacted>

commit 5a7a88f1b488e4ee49eb3d5b82612d4d9ffdf2c3 upstream.

The port number is only valid if IB_QP_PORT is set in the mask.
So only check port number if it is valid to prevent modify_qp from
failing due to an invalid port number.

Fixes: 5ecce4c9b17b("Check port number supplied by user verbs cmds")
Reviewed-by: Steve Wise <redacted>
Signed-off-by: Mustafa Ismail <redacted>
Tested-by: Mike Marciniszyn <redacted>
Signed-off-by: Doug Ledford <redacted>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>


---
 drivers/infiniband/core/uverbs_cmd.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

--- a/drivers/infiniband/core/uverbs_cmd.c
+++ b/drivers/infiniband/core/uverbs_cmd.c

@@ -2342,8 +2342,9 @@ ssize_t ib_uverbs_modify_qp(struct ib_uv
 	if (copy_from_user(&cmd, buf, sizeof cmd))
 		return -EFAULT;
 
-	if (cmd.port_num < rdma_start_port(ib_dev) ||
-	    cmd.port_num > rdma_end_port(ib_dev))
+	if ((cmd.attr_mask & IB_QP_PORT) &&
+	    (cmd.port_num < rdma_start_port(ib_dev) ||
+	     cmd.port_num > rdma_end_port(ib_dev)))
 		return -EINVAL;
 
 	INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,

Patches currently in stable-queue which might be from mustafa.ismail@intel.com are

queue-4.9/rdma-uverbs-fix-the-check-for-port-number.patch