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| author | Jesse Gross <jesse@nicira.com> | 2012-08-06 15:49:47 -0700 |
|---|---|---|
| committer | Jesse Gross <jesse@nicira.com> | 2012-08-06 15:49:47 -0700 |
| commit | 4185392da4b4b494e51934c51b999b4df424afba (patch) | |
| tree | d007cf7c590f1f74674db208099ca772f90f2d5c /net | |
| parent | 0d7614f09c1ebdbaa1599a5aba7593f147bf96ee (diff) | |
| download | linux-stable-4185392da4b4b494e51934c51b999b4df424afba.tar.gz linux-stable-4185392da4b4b494e51934c51b999b4df424afba.tar.bz2 linux-stable-4185392da4b4b494e51934c51b999b4df424afba.zip | |
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')
| -rw-r--r-- | net/openvswitch/datapath.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c index d8277d29e710..cf58cedad083 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); |