release/5.2.27/net-Zeroing-the-structure-ethtool_wolinfo-in-ethtool.patch

From fb87cd347da41bf7f4316412147e3ae925b1732e Mon Sep 17 00:00:00 2001
From: zhanglin <zhang.lin16@zte.com.cn>
Date: Sat, 26 Oct 2019 15:54:16 +0800
Subject: [PATCH] net: Zeroing the structure ethtool_wolinfo in
 ethtool_get_wol()

commit 5ff223e86f5addbfae26419cbb5d61d98f6fbf7d upstream.

memset() the structure ethtool_wolinfo that has padded bytes
but the padded bytes have not been zeroed out.

Signed-off-by: zhanglin <zhang.lin16@zte.com.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>

diff --git a/net/core/ethtool.c b/net/core/ethtool.c
index 4d1011b2e24f..427ae856a8ac 100644
--- a/net/core/ethtool.c
+++ b/net/core/ethtool.c
@@ -1395,11 +1395,13 @@ static int ethtool_reset(struct net_device *dev, char __user *useraddr)
 
 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
 {
-	struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
+	struct ethtool_wolinfo wol;
 
 	if (!dev->ethtool_ops->get_wol)
 		return -EOPNOTSUPP;
 
+	memset(&wol, 0, sizeof(struct ethtool_wolinfo));
+	wol.cmd = ETHTOOL_GWOL;
 	dev->ethtool_ops->get_wol(dev, &wol);
 
 	if (copy_to_user(useraddr, &wol, sizeof(wol)))
-- 
2.7.4