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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Adrian Chiris <adrianc@mellanox.com>,
        Leon Romanovsky <leonro@mellanox.com>,
        "David S. Miller" <davem@davemloft.net>
Subject: [PATCH 5.5 007/367] net/core: Do not clear VF index for node/port GUIDs query
Date:   Mon, 10 Feb 2020 04:28:40 -0800
Message-Id: <20200210122424.498551744@linuxfoundation.org>
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From: Leon Romanovsky <leonro@mellanox.com>

[ Upstream commit 9fbf082f569980ddd7cab348e0a118678db0e47e ]

VF numbers were assigned to node_guid and port_guid, but cleared
right before such query calls were issued. It caused to return
node/port GUIDs of VF index 0 for all VFs.

Fixes: 30aad41721e0 ("net/core: Add support for getting VF GUIDs")
Reported-by: Adrian Chiris <adrianc@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 net/core/rtnetlink.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -1241,6 +1241,8 @@ static noinline_for_stack int rtnl_fill_
 		return 0;
 
 	memset(&vf_vlan_info, 0, sizeof(vf_vlan_info));
+	memset(&node_guid, 0, sizeof(node_guid));
+	memset(&port_guid, 0, sizeof(port_guid));
 
 	vf_mac.vf =
 		vf_vlan.vf =
@@ -1289,8 +1291,6 @@ static noinline_for_stack int rtnl_fill_
 		    sizeof(vf_trust), &vf_trust))
 		goto nla_put_vf_failure;
 
-	memset(&node_guid, 0, sizeof(node_guid));
-	memset(&port_guid, 0, sizeof(port_guid));
 	if (dev->netdev_ops->ndo_get_vf_guid &&
 	    !dev->netdev_ops->ndo_get_vf_guid(dev, vfs_num, &node_guid,
 					      &port_guid)) {