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path: root/net/ipv6/tcp_ipv6.c
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Diffstat (limited to 'net/ipv6/tcp_ipv6.c')
-rw-r--r--net/ipv6/tcp_ipv6.c15
1 files changed, 4 insertions, 11 deletions
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index d693cb988b7..d746d3b27ef 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -114,16 +114,9 @@ static int tcp_v6_get_port(struct sock *sk, unsigned short snum)
int low = sysctl_local_port_range[0];
int high = sysctl_local_port_range[1];
int remaining = (high - low) + 1;
- int rover;
+ int rover = net_random() % (high - low) + low;
- spin_lock(&tcp_hashinfo.portalloc_lock);
- if (tcp_hashinfo.port_rover < low)
- rover = low;
- else
- rover = tcp_hashinfo.port_rover;
- do { rover++;
- if (rover > high)
- rover = low;
+ do {
head = &tcp_hashinfo.bhash[inet_bhashfn(rover, tcp_hashinfo.bhash_size)];
spin_lock(&head->lock);
inet_bind_bucket_for_each(tb, node, &head->chain)
@@ -132,9 +125,9 @@ static int tcp_v6_get_port(struct sock *sk, unsigned short snum)
break;
next:
spin_unlock(&head->lock);
+ if (++rover > high)
+ rover = low;
} while (--remaining > 0);
- tcp_hashinfo.port_rover = rover;
- spin_unlock(&tcp_hashinfo.portalloc_lock);
/* Exhausted local port range during search? It is not
* possible for us to be holding one of the bind hash