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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: "Håkon Bugge" <Haakon.Bugge@oracle.com>,
	"Håkon Bugge" <haakon.bugge@oracle.com>,
	"Jason Gunthorpe" <jgg@mellanox.com>,
	"Sasha Levin" <sashal@kernel.org>,
	linux-rdma@vger.kernel.org
Subject: [PATCH AUTOSEL 4.14 014/109] RDMA/i40iw: Fix incorrect iterator type
Date: Sat,  9 Nov 2019 21:44:06 -0500
Message-ID: <20191110024541.31567-14-sashal@kernel.org> (raw)
In-Reply-To: <20191110024541.31567-1-sashal@kernel.org>

From: Håkon Bugge <Haakon.Bugge@oracle.com>

[ Upstream commit 802fa45cd320de319e86c93bca72abec028ba059 ]

Commit f27b4746f378 ("i40iw: add connection management code") uses an
incorrect rcu iterator, whilst holding the rtnl_lock. Since the
critical region invokes i40iw_manage_qhash(), which is a sleeping
function, the rcu locking and traversal cannot be used.

Signed-off-by: Håkon Bugge <haakon.bugge@oracle.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/infiniband/hw/i40iw/i40iw_cm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/infiniband/hw/i40iw/i40iw_cm.c b/drivers/infiniband/hw/i40iw/i40iw_cm.c
index b7f1ce5333cb8..880c63579ba88 100644
--- a/drivers/infiniband/hw/i40iw/i40iw_cm.c
+++ b/drivers/infiniband/hw/i40iw/i40iw_cm.c
@@ -1667,7 +1667,7 @@ static enum i40iw_status_code i40iw_add_mqh_6(struct i40iw_device *iwdev,
 	unsigned long flags;
 
 	rtnl_lock();
-	for_each_netdev_rcu(&init_net, ip_dev) {
+	for_each_netdev(&init_net, ip_dev) {
 		if ((((rdma_vlan_dev_vlan_id(ip_dev) < I40IW_NO_VLAN) &&
 		      (rdma_vlan_dev_real_dev(ip_dev) == iwdev->netdev)) ||
 		     (ip_dev == iwdev->netdev)) && (ip_dev->flags & IFF_UP)) {
-- 
2.20.1


       reply index

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20191110024541.31567-1-sashal@kernel.org>
2019-11-10  2:44 ` Sasha Levin [this message]
2019-11-10  2:45 ` [PATCH AUTOSEL 4.14 108/109] IB/iser: Fix possible NULL deref at iser_inv_desc() Sasha Levin

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