diff options
Diffstat (limited to 'net/ipv6/udp.c')
| -rw-r--r-- | net/ipv6/udp.c | 27 |
1 files changed, 17 insertions, 10 deletions
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c index 8a07c63ddccd..a48a8faa401c 100644 --- a/net/ipv6/udp.c +++ b/net/ipv6/udp.c @@ -45,6 +45,7 @@ #include <net/tcp_states.h> #include <net/ip6_checksum.h> #include <net/xfrm.h> +#include <net/inet_hashtables.h> #include <net/inet6_hashtables.h> #include <net/busy_poll.h> @@ -964,15 +965,21 @@ static struct sock *__udp6_lib_demux_lookup(struct net *net, int dif) { struct sock *sk; - - rcu_read_lock(); - sk = __udp6_lib_lookup(net, rmt_addr, rmt_port, loc_addr, loc_port, - dif, &udp_table); - if (sk && !atomic_inc_not_zero(&sk->sk_refcnt)) - sk = NULL; - rcu_read_unlock(); - - return sk; + struct hlist_nulls_node *hnode; + unsigned short hnum = ntohs(loc_port); + unsigned int hash2 = udp6_portaddr_hash(net, loc_addr, hnum); + unsigned int slot2 = hash2 & udp_table.mask; + struct udp_hslot *hslot2 = &udp_table.hash2[slot2]; + + const __portpair ports = INET_COMBINED_PORTS(rmt_port, hnum); + + udp_portaddr_for_each_entry_rcu(sk, hnode, &hslot2->head) { + if (INET6_MATCH(sk, net, rmt_addr, loc_addr, ports, dif)) + return sk; + /* Only check first socket in chain */ + break; + } + return NULL; } static void udp_v6_early_demux(struct sk_buff *skb) @@ -997,7 +1004,7 @@ static void udp_v6_early_demux(struct sk_buff *skb) else return; - if (!sk) + if (!sk || !atomic_inc_not_zero_hint(&sk->sk_refcnt, 2)) return; skb->sk = sk; |