linux-kernel - [PATCH 4.17 051/101] xen-netfront: Fix mismatched rtnl

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Date:   Fri, 20 Jul 2018 14:13:57 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Ben Hutchings <ben.hutchings@...ethink.co.uk>,
        Ross Lagerwall <ross.lagerwall@...rix.com>,
        Juergen Gross <jgross@...e.com>,
        "David S. Miller" <davem@...emloft.net>
Subject: [PATCH 4.17 051/101] xen-netfront: Fix mismatched rtnl_unlock

4.17-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Ross Lagerwall <ross.lagerwall@...rix.com>

[ Upstream commit cb257783c2927b73614b20f915a91ff78aa6f3e8 ]

Fixes: f599c64fdf7d ("xen-netfront: Fix race between device setup and open")
Reported-by: Ben Hutchings <ben.hutchings@...ethink.co.uk>
Signed-off-by: Ross Lagerwall <ross.lagerwall@...rix.com>
Reviewed-by: Juergen Gross <jgross@...e.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/xen-netfront.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/net/xen-netfront.c
+++ b/drivers/net/xen-netfront.c
@@ -1810,7 +1810,7 @@ static int talk_to_netback(struct xenbus
 	err = xen_net_read_mac(dev, info->netdev->dev_addr);
 	if (err) {
 		xenbus_dev_fatal(dev, err, "parsing %s/mac", dev->nodename);
-		goto out;
+		goto out_unlocked;
 	}
 
 	rtnl_lock();
@@ -1925,6 +1925,7 @@ abort_transaction_no_dev_fatal:
 	xennet_destroy_queues(info);
  out:
 	rtnl_unlock();
+out_unlocked:
 	device_unregister(&dev->dev);
 	return err;
 }