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| author | Patrick McHardy <kaber@trash.net> | 2009-04-17 15:59:23 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-04-17 15:59:23 -0700 |
| commit | 7816a0a862d851d0b05710e7d94bfe390f3180e2 (patch) | |
| tree | 0b4f9099df21b1f7295637e8c28aa72721150b7d /drivers/net/macvlan.c | |
| parent | 75a241f959a65ec9bde237d1af1a34ef794f0c9c (diff) | |
| download | linux-7816a0a862d851d0b05710e7d94bfe390f3180e2.tar.gz linux-7816a0a862d851d0b05710e7d94bfe390f3180e2.tar.bz2 linux-7816a0a862d851d0b05710e7d94bfe390f3180e2.zip | |
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>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/macvlan.c')
| -rw-r--r-- | drivers/net/macvlan.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c index 70d3ef4a2c5f..214a8cf2b708 100644 --- a/drivers/net/macvlan.c +++ b/drivers/net/macvlan.c @@ -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); } |