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authorJesse Gross <jesse@nicira.com>2012-08-06 15:49:47 -0700
committerJesse Gross <jesse@nicira.com>2012-08-06 15:49:47 -0700
commit4185392da4b4b494e51934c51b999b4df424afba (patch)
treed007cf7c590f1f74674db208099ca772f90f2d5c /net/openvswitch
parent0d7614f09c1ebdbaa1599a5aba7593f147bf96ee (diff)
downloadlinux-4185392da4b4b494e51934c51b999b4df424afba.tar.gz
openvswitch: Relax set header validation.
When installing a flow with an action to set a particular field we need to validate that the packets that are part of the flow actually contain that header. With IP we use zeroed addresses and with TCP/UDP the check is for zeroed ports. This check is overly broad and can catch packets like DHCP requests that have a zero source address in a legitimate header. This changes the check to look for a zeroed protocol number for IP or for both ports be zero for TCP/UDP before considering the header to not exist. Reported-by: Ethan Jackson <ethan@nicira.com> Signed-off-by: Jesse Gross <jesse@nicira.com>
Diffstat (limited to 'net/openvswitch')
-rw-r--r--net/openvswitch/datapath.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c
index d8277d29e71..cf58cedad08 100644
--- a/net/openvswitch/datapath.c
+++ b/net/openvswitch/datapath.c
@@ -425,10 +425,10 @@ static int validate_sample(const struct nlattr *attr,
static int validate_tp_port(const struct sw_flow_key *flow_key)
{
if (flow_key->eth.type == htons(ETH_P_IP)) {
- if (flow_key->ipv4.tp.src && flow_key->ipv4.tp.dst)
+ if (flow_key->ipv4.tp.src || flow_key->ipv4.tp.dst)
return 0;
} else if (flow_key->eth.type == htons(ETH_P_IPV6)) {
- if (flow_key->ipv6.tp.src && flow_key->ipv6.tp.dst)
+ if (flow_key->ipv6.tp.src || flow_key->ipv6.tp.dst)
return 0;
}
@@ -460,7 +460,7 @@ static int validate_set(const struct nlattr *a,
if (flow_key->eth.type != htons(ETH_P_IP))
return -EINVAL;
- if (!flow_key->ipv4.addr.src || !flow_key->ipv4.addr.dst)
+ if (!flow_key->ip.proto)
return -EINVAL;
ipv4_key = nla_data(ovs_key);