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| author | Antonio Quartulli <ordex@autistici.org> | 2013-03-30 07:07:37 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-03-30 17:28:33 -0400 |
| commit | 537aadc3a4a0336e432c789c577b7efa0adf4af0 (patch) | |
| tree | 182c1cb05798a139077969ddb04938d7b49e61c1 /net/ipv4/ip_gre.c | |
| parent | a691ce7fe451363d2f1fa48d30c8f4b87c2475d4 (diff) | |
| download | linux-537aadc3a4a0336e432c789c577b7efa0adf4af0.tar.gz | |
ip_gre: don't overwrite iflink during net_dev init
iflink is currently set to 0 in __gre_tunnel_init(). This
function is invoked in gre_tap_init() and
ipgre_tunnel_init() which are both used to initialise the
ndo_init field of the respective net_device_ops structs
(ipgre.. and gre_tap..) used by GRE interfaces.
However, in netdevice_register() iflink is first set to -1,
then ndo_init is invoked and then iflink is assigned to a
proper value if and only if it still was -1.
Assigning 0 to iflink in ndo_init is therefore first
preventing netdev_register() to correctly assign it a proper
value and then breaking iflink at all since 0 has not
correct meaning.
Fix this by removing the iflink assignment in
__gre_tunnel_init().
Introduced by c54419321455631079c7d6e60bc732dd0c5914c5
("GRE: Refactor GRE tunneling code.")
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Cc: Pravin B Shelar <pshelar@nicira.com>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Antonio Quartulli <ordex@autistici.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/ip_gre.c')
| -rw-r--r-- | net/ipv4/ip_gre.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c index ad662e906f7e..e5dfd2843f28 100644 --- a/net/ipv4/ip_gre.c +++ b/net/ipv4/ip_gre.c @@ -660,7 +660,6 @@ static void __gre_tunnel_init(struct net_device *dev) dev->needed_headroom = LL_MAX_HEADER + sizeof(struct iphdr) + 4; dev->mtu = ETH_DATA_LEN - sizeof(struct iphdr) - 4; - dev->iflink = 0; dev->features |= NETIF_F_NETNS_LOCAL | GRE_FEATURES; dev->hw_features |= GRE_FEATURES; |