netdev - [net-next 10/11] e1000e: Don't return uninitialized stats

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Date:   Tue,  6 Jun 2017 01:58:08 -0700
From:   Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To:     davem@...emloft.net
Cc:     Benjamin Poirier <bpoirier@...e.com>, netdev@...r.kernel.org,
        nhorman@...hat.com, sassmann@...hat.com, jogreene@...hat.com,
        Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: [net-next 10/11] e1000e: Don't return uninitialized stats

From: Benjamin Poirier <bpoirier@...e.com>

Some statistics passed to ethtool are garbage because e1000e_get_stats64()
doesn't write them, for example: tx_heartbeat_errors. This leaks kernel
memory to userspace and confuses users.

Do like ixgbe and use dev_get_stats() which first zeroes out
rtnl_link_stats64.

Fixes: 5944701df90d ("net: remove useless memset's in drivers get_stats64")
Reported-by: Stefan Priebe <s.priebe@...fihost.ag>
Signed-off-by: Benjamin Poirier <bpoirier@...e.com>
Tested-by: Aaron Brown <aaron.f.brown@...el.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
---
 drivers/net/ethernet/intel/e1000e/ethtool.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/e1000e/ethtool.c b/drivers/net/ethernet/intel/e1000e/ethtool.c
index c658f6ebf7cb..003cbd605799 100644
--- a/drivers/net/ethernet/intel/e1000e/ethtool.c
+++ b/drivers/net/ethernet/intel/e1000e/ethtool.c
@@ -2073,7 +2073,7 @@ static void e1000_get_ethtool_stats(struct net_device *netdev,
 
 	pm_runtime_get_sync(netdev->dev.parent);
 
-	e1000e_get_stats64(netdev, &net_stats);
+	dev_get_stats(netdev, &net_stats);
 
 	pm_runtime_put_sync(netdev->dev.parent);
 
-- 
2.12.2