net: Zeroing the structure ethtool_wolinfo in ethtool_get_wol()

[ Upstream commit 5ff223e86f5addbfae26419cbb5d61d98f6fbf7d ]

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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/net/core/ethtool.c b/net/core/ethtool.c
index 996813f..09d828a 100644 (file)
--- a/net/core/ethtool.c
+++ b/net/core/ethtool.c
@@ -1482,11 +1482,13 @@ 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)))