[PATCH] net: Zeroing the structure ethtool_wolinfo in ethtool_get_wol()

zhanglin
2019-10-26T07:52:23Z

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>
---
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 aeabc48..563a845 100644
--- a/net/core/ethtool.c
+++ b/net/core/ethtool.c
@@ -1471,11 +1471,13 @@ 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)))
--
2.15.2