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| author | Joe Stringer <joestringer@nicira.com> | 2015-10-19 19:18:57 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-10-21 19:33:36 -0700 |
| commit | 9e384715e9e702704c6941c575f0e6b322132a3a (patch) | |
| tree | 741598dfa595f35401834726175acb64d3461191 /net/openvswitch/flow_netlink.c | |
| parent | e2e8009ff72ad2a795b67785f3238af152146368 (diff) | |
| download | linux-stable-9e384715e9e702704c6941c575f0e6b322132a3a.tar.gz linux-stable-9e384715e9e702704c6941c575f0e6b322132a3a.tar.bz2 linux-stable-9e384715e9e702704c6941c575f0e6b322132a3a.zip | |
openvswitch: Reject ct_state masks for unknown bits
Currently, 0-bits are generated in ct_state where the bit position is
undefined, and matches are accepted on these bit-positions. If userspace
requests to match the 0-value for this bit then it may expect only a
subset of traffic to match this value, whereas currently all packets
will have this bit set to 0. Fix this by rejecting such masks.
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/openvswitch/flow_netlink.c')
| -rw-r--r-- | net/openvswitch/flow_netlink.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/net/openvswitch/flow_netlink.c b/net/openvswitch/flow_netlink.c index 171a691f1c32..bd710bc37469 100644 --- a/net/openvswitch/flow_netlink.c +++ b/net/openvswitch/flow_netlink.c @@ -816,7 +816,7 @@ static int metadata_from_nlattrs(struct net *net, struct sw_flow_match *match, ovs_ct_verify(net, OVS_KEY_ATTR_CT_STATE)) { u32 ct_state = nla_get_u32(a[OVS_KEY_ATTR_CT_STATE]); - if (!is_mask && !ovs_ct_state_supported(ct_state)) { + if (ct_state & ~CT_SUPPORTED_MASK) { OVS_NLERR(log, "ct_state flags %08x unsupported", ct_state); return -EINVAL; @@ -1099,6 +1099,9 @@ static void nlattr_set(struct nlattr *attr, u8 val, } else { memset(nla_data(nla), val, nla_len(nla)); } + + if (nla_type(nla) == OVS_KEY_ATTR_CT_STATE) + *(u32 *)nla_data(nla) &= CT_SUPPORTED_MASK; } } |