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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 | |
| parent | e2e8009ff72ad2a795b67785f3238af152146368 (diff) | |
| download | linux-9e384715e9e702704c6941c575f0e6b322132a3a.tar.gz linux-9e384715e9e702704c6941c575f0e6b322132a3a.tar.bz2 linux-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>
| -rw-r--r-- | net/openvswitch/conntrack.h | 16 | ||||
| -rw-r--r-- | net/openvswitch/flow_netlink.c | 5 |
2 files changed, 9 insertions, 12 deletions
diff --git a/net/openvswitch/conntrack.h b/net/openvswitch/conntrack.h index da8714942c95..82e0dfc66028 100644 --- a/net/openvswitch/conntrack.h +++ b/net/openvswitch/conntrack.h @@ -35,12 +35,9 @@ void ovs_ct_fill_key(const struct sk_buff *skb, struct sw_flow_key *key); int ovs_ct_put_key(const struct sw_flow_key *key, struct sk_buff *skb); void ovs_ct_free_action(const struct nlattr *a); -static inline bool ovs_ct_state_supported(u32 state) -{ - return !(state & ~(OVS_CS_F_NEW | OVS_CS_F_ESTABLISHED | - OVS_CS_F_RELATED | OVS_CS_F_REPLY_DIR | - OVS_CS_F_INVALID | OVS_CS_F_TRACKED)); -} +#define CT_SUPPORTED_MASK (OVS_CS_F_NEW | OVS_CS_F_ESTABLISHED | \ + OVS_CS_F_RELATED | OVS_CS_F_REPLY_DIR | \ + OVS_CS_F_INVALID | OVS_CS_F_TRACKED) #else #include <linux/errno.h> @@ -53,11 +50,6 @@ static inline bool ovs_ct_verify(struct net *net, int attr) return false; } -static inline bool ovs_ct_state_supported(u32 state) -{ - return false; -} - static inline int ovs_ct_copy_action(struct net *net, const struct nlattr *nla, const struct sw_flow_key *key, struct sw_flow_actions **acts, bool log) @@ -94,5 +86,7 @@ static inline int ovs_ct_put_key(const struct sw_flow_key *key, } static inline void ovs_ct_free_action(const struct nlattr *a) { } + +#define CT_SUPPORTED_MASK 0 #endif /* CONFIG_NF_CONNTRACK */ #endif /* ovs_conntrack.h */ 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; } } |