diff options
| author | Sven Eckelmann <sven@narfation.org> | 2011-03-04 21:36:41 +0000 |
|---|---|---|
| committer | Marek Lindner <lindner_marek@yahoo.de> | 2011-03-05 12:52:09 +0100 |
| commit | e44d8fe2b5c27ecc230f886d4cc49fcbd86f87a0 (patch) | |
| tree | 1ed6d2b1fa04a4fe333d8eda498b3e866129d4d3 /net/batman-adv/soft-interface.c | |
| parent | 7cefb149a6b0e4f7c5adfa27dcf285b729063848 (diff) | |
batman-adv: Disallow regular interface as mesh device
When trying to associate a net_device with another net_device which
already exists, batman-adv assumes that this interface is a fully
initialized batman mesh interface without checking it. The behaviour
when accessing data behind netdev_priv of a random net_device is
undefined and potentially dangerous.
Reported-by: Linus Lüssing <linus.luessing@ascom.ch>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Diffstat (limited to 'net/batman-adv/soft-interface.c')
| -rw-r--r-- | net/batman-adv/soft-interface.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c index 6b514ecee5a..9ed26140a26 100644 --- a/net/batman-adv/soft-interface.c +++ b/net/batman-adv/soft-interface.c @@ -622,6 +622,19 @@ void softif_destroy(struct net_device *soft_iface) unregister_netdevice(soft_iface); } +int softif_is_valid(struct net_device *net_dev) +{ +#ifdef HAVE_NET_DEVICE_OPS + if (net_dev->netdev_ops->ndo_start_xmit == interface_tx) + return 1; +#else + if (net_dev->hard_start_xmit == interface_tx) + return 1; +#endif + + return 0; +} + /* ethtool */ static int bat_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) { |