From 5ff223e86f5addbfae26419cbb5d61d98f6fbf7d Mon Sep 17 00:00:00 2001 From: zhanglin Date: Sat, 26 Oct 2019 15:54:16 +0800 Subject: [PATCH] net: Zeroing the structure ethtool_wolinfo in ethtool_get_wol() memset() the structure ethtool_wolinfo that has padded bytes but the padded bytes have not been zeroed out. Signed-off-by: zhanglin Signed-off-by: David S. Miller --- net/core/ethtool.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/net/core/ethtool.c b/net/core/ethtool.c index c763106c73fc..cd9bc67381b2 100644 --- a/net/core/ethtool.c +++ b/net/core/ethtool.c @@ -1396,11 +1396,13 @@ 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)))