[IPV6]: Fix infinite loop in udp_v6_get_port().

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
git-mirror · Oct 4, 2005 · 87bf9c9 · 87bf9c9
1 parent dd7205e
commit 87bf9c9
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
@@ -99,14 +99,16 @@ static int udp_v6_get_port(struct sock *sk, unsigned short snum)
 		next:;
 		}
 		result = best;
-		for(;; result += UDP_HTABLE_SIZE) {
+		for(i = 0; i < (1 << 16) / UDP_HTABLE_SIZE; i++, result += UDP_HTABLE_SIZE) {
 			if (result > sysctl_local_port_range[1])
 				result = sysctl_local_port_range[0]
 					+ ((result - sysctl_local_port_range[0]) &
 					   (UDP_HTABLE_SIZE - 1));
 			if (!udp_lport_inuse(result))
 				break;
 		}
+		if (i >= (1 << 16) / UDP_HTABLE_SIZE)
+			goto fail;
 gotit:
 		udp_port_rover = snum = result;
 	} else {