diff options
| author | Roger Luethi <rl@hellgate.ch> | 2011-03-17 06:37:21 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-03-18 15:13:10 -0700 |
| commit | 5e5069b41d5b82bcadc1dbf73f48476b428c102f (patch) | |
| tree | dd7e2eb386328b0c94ef939d27540c10f11df8e2 /net | |
| parent | 67c5c6cb8129c595f21e88254a3fc6b3b841ae8e (diff) | |
| download | lwn-5e5069b41d5b82bcadc1dbf73f48476b428c102f.tar.gz lwn-5e5069b41d5b82bcadc1dbf73f48476b428c102f.zip | |
ethtool: __ethtool_set_sg: check for function pointer before using it
__ethtool_set_sg does not check if dev->ethtool_ops->set_sg is defined
which can result in a NULL pointer dereference when ethtool is used to
change SG settings for drivers without SG support.
Signed-off-by: Roger Luethi <rl@hellgate.ch>
Reviewed-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/core/ethtool.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/net/core/ethtool.c b/net/core/ethtool.c index c1a71bb738da..a1086fb0c0c7 100644 --- a/net/core/ethtool.c +++ b/net/core/ethtool.c @@ -1457,6 +1457,9 @@ static int __ethtool_set_sg(struct net_device *dev, u32 data) { int err; + if (!dev->ethtool_ops->set_sg) + return -EOPNOTSUPP; + if (data && !(dev->features & NETIF_F_ALL_CSUM)) return -EINVAL; |