--- linux-2.6.3-old/net/ipv4/netfilter/ip_conntrack_core.c	2004-04-14 21:32:58.000000000 +0200
+++ linux-2.6.3/net/ipv4/netfilter/ip_conntrack_core.c	2004-04-22 00:55:42.000000000 +0200
@@ -226,7 +226,9 @@
 	IP_NF_ASSERT(!expect->sibling);
 
 	/* delete from global and local lists */
+	WRITE_LOCK(&ip_conntrack_expect_list);
 	list_del(&expect->list);
+	WRITE_UNLOCK(&ip_conntrack_expect_list);
 	list_del(&expect->expected_list);
 
 	/* decrement expect-count of master conntrack */