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| author | Joe Stringer <joestringer@nicira.com> | 2015-10-16 11:08:18 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-10-18 22:24:50 -0700 |
| commit | 740dbc289155fdeed32438396370e70b684cd45e (patch) | |
| tree | d57e072326e2c7867556f7f199a41e4b30b8b36f /net | |
| parent | a5d6f7dd300e7a3237410cc9d6d00427c18281c3 (diff) | |
| download | linux-stable-740dbc289155fdeed32438396370e70b684cd45e.tar.gz linux-stable-740dbc289155fdeed32438396370e70b684cd45e.tar.bz2 linux-stable-740dbc289155fdeed32438396370e70b684cd45e.zip | |
openvswitch: Scrub skb between namespaces
If OVS receives a packet from another namespace, then the packet should
be scrubbed. However, people have already begun to rely on the behaviour
that skb->mark is preserved across namespaces, so retain this one field.
This is mainly to address information leakage between namespaces when
using OVS internal ports, but by placing it in ovs_vport_receive() it is
more generally applicable, meaning it should not be overlooked if other
port types are allowed to be moved into namespaces in future.
Signed-off-by: Joe Stringer <joestringer@nicira.com>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
Acked-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/openvswitch/vport.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/net/openvswitch/vport.c b/net/openvswitch/vport.c index fc5c0b9ccfe9..12a36ac21eda 100644 --- a/net/openvswitch/vport.c +++ b/net/openvswitch/vport.c @@ -444,6 +444,15 @@ int ovs_vport_receive(struct vport *vport, struct sk_buff *skb, OVS_CB(skb)->input_vport = vport; OVS_CB(skb)->mru = 0; + if (unlikely(dev_net(skb->dev) != ovs_dp_get_net(vport->dp))) { + u32 mark; + + mark = skb->mark; + skb_scrub_packet(skb, true); + skb->mark = mark; + tun_info = NULL; + } + /* Extract flow from 'skb' into 'key'. */ error = ovs_flow_key_extract(tun_info, skb, &key); if (unlikely(error)) { |