Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 3.14 073/140] vti: dont allow to add the same tunnel twice | Date | Wed, 28 May 2014 21:33:32 -0700 |
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3.14-stable review patch. If anyone has any objections, please let me know.
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From: Nicolas Dichtel <nicolas.dichtel@6wind.com>
[ Upstream commit 8d89dcdf80d88007647945a753821a06eb6cc5a5 ]
Before the patch, it was possible to add two times the same tunnel: ip l a vti1 type vti remote 10.16.0.121 local 10.16.0.249 key 41 ip l a vti2 type vti remote 10.16.0.121 local 10.16.0.249 key 41
It was possible, because ip_tunnel_newlink() calls ip_tunnel_find() with the argument dev->type, which was set only later (when calling ndo_init handler in register_netdevice()). Let's set this type in the setup handler, which is called before newlink handler.
Introduced by commit b9959fd3b0fa ("vti: switch to new ip tunnel code").
CC: Cong Wang <amwang@redhat.com> CC: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- net/ipv4/ip_vti.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/net/ipv4/ip_vti.c +++ b/net/ipv4/ip_vti.c @@ -207,6 +207,7 @@ static const struct net_device_ops vti_n static void vti_tunnel_setup(struct net_device *dev) { dev->netdev_ops = &vti_netdev_ops; + dev->type = ARPHRD_TUNNEL; ip_tunnel_setup(dev, vti_net_id); } @@ -218,7 +219,6 @@ static int vti_tunnel_init(struct net_de memcpy(dev->dev_addr, &iph->saddr, 4); memcpy(dev->broadcast, &iph->daddr, 4); - dev->type = ARPHRD_TUNNEL; dev->hard_header_len = LL_MAX_HEADER + sizeof(struct iphdr); dev->mtu = ETH_DATA_LEN; dev->flags = IFF_NOARP;
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