@@ -376,7 +376,8 @@ static u32 macvlan_ethtool_get_rx_csum(struct net_device *dev)
const struct macvlan_dev *vlan = netdev_priv(dev);
struct net_device *lowerdev = vlan->lowerdev;
- if (lowerdev->ethtool_ops->get_rx_csum == NULL)
+ if (lowerdev->ethtool_ops == NULL ||
+ lowerdev->ethtool_ops->get_rx_csum == NULL)
return 0;
return lowerdev->ethtool_ops->get_rx_csum(lowerdev);
}
@@ -387,7 +388,8 @@ static int macvlan_ethtool_get_settings(struct net_device *dev,
const struct macvlan_dev *vlan = netdev_priv(dev);
struct net_device *lowerdev = vlan->lowerdev;
- if (!lowerdev->ethtool_ops->get_settings)
+ if (!lowerdev->ethtool_ops ||
+ !lowerdev->ethtool_ops->get_settings)
return -EOPNOTSUPP;
return lowerdev->ethtool_ops->get_settings(lowerdev, cmd);
@@ -398,7 +400,8 @@ static u32 macvlan_ethtool_get_flags(struct net_device *dev)
const struct macvlan_dev *vlan = netdev_priv(dev);
struct net_device *lowerdev = vlan->lowerdev;
- if (!lowerdev->ethtool_ops->get_flags)
+ if (!lowerdev->ethtool_ops ||
+ !lowerdev->ethtool_ops->get_flags)
return 0;
return lowerdev->ethtool_ops->get_flags(lowerdev);
}
@@ -668,7 +668,8 @@ static int vlan_ethtool_get_settings(struct net_device *dev,
const struct vlan_dev_info *vlan = vlan_dev_info(dev);
struct net_device *real_dev = vlan->real_dev;
- if (!real_dev->ethtool_ops->get_settings)
+ if (!real_dev->ethtool_ops ||
+ !real_dev->ethtool_ops->get_settings)
return -EOPNOTSUPP;
return real_dev->ethtool_ops->get_settings(real_dev, cmd);
commit c9bfff86b3c8e39df7ddd34e1eac238edc5bf810 Author: Patrick McHardy <kaber@trash.net> Date: Fri Apr 17 18:04:43 2009 +0200 vlan/macvlan: fix NULL pointer dereferences in ethtool handlers Check whether the underlying device provides a set of ethtool ops before checking for individual handlers to avoid NULL pointer dereferences. Reported-by: Art van Breemen <ard@telegraafnet.nl> Signed-off-by: Patrick McHardy <kaber@trash.net>