Patch "IB/ipoib: Change list_del to list_del_init in the tx object" has been added to the 4.4-stable tree

[<gregkh@linuxfoundation.org>]

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

    IB/ipoib: Change list_del to list_del_init in the tx object

to the 4.4-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-ipoib-change-list_del-to-list_del_init-in-the-tx-object.patch
and it can be found in the queue-4.4 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 Thu Nov  9 18:22:51 CET 2017
From: Feras Daoud <ferasda@mellanox.com>
Date: Wed, 28 Dec 2016 14:47:28 +0200
Subject: IB/ipoib: Change list_del to list_del_init in the tx object

From: Feras Daoud <ferasda@mellanox.com>


[ Upstream commit 27d41d29c7f093f6f77843624fbb080c1b4a8b9c ]

Since ipoib_cm_tx_start function and ipoib_cm_tx_reap function
belong to different work queues, they can run in parallel.
In this case if ipoib_cm_tx_reap calls list_del and release the
lock, ipoib_cm_tx_start may acquire it and call list_del_init
on the already deleted object.
Changing list_del to list_del_init in ipoib_cm_tx_reap fixes the problem.

Fixes: 839fcaba355a ("IPoIB: Connected mode experimental support")
Signed-off-by: Feras Daoud <ferasda@mellanox.com>
Signed-off-by: Erez Shitrit <erezsh@mellanox.com>
Reviewed-by: Alex Vesker <valex@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Reviewed-by: Yuval Shaia <yuval.shaia@oracle.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/infiniband/ulp/ipoib/ipoib_cm.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/infiniband/ulp/ipoib/ipoib_cm.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_cm.c
@@ -1373,7 +1373,7 @@ static void ipoib_cm_tx_reap(struct work
 
 	while (!list_empty(&priv->cm.reap_list)) {
 		p = list_entry(priv->cm.reap_list.next, typeof(*p), list);
-		list_del(&p->list);
+		list_del_init(&p->list);
 		spin_unlock_irqrestore(&priv->lock, flags);
 		netif_tx_unlock_bh(dev);
 		ipoib_cm_tx_destroy(p);


Patches currently in stable-queue which might be from ferasda@mellanox.com are

queue-4.4/ib-ipoib-change-list_del-to-list_del_init-in-the-tx-object.patch