netfilter 02/04: ctnetlink: fix crash during expectation creation

[Patrick McHardy <kaber@trash.net>]

commit 626ba8fbac9156a94a80be46ffd2f2ce9e4e89a0
Author: Pablo Neira Ayuso <pablo@netfilter.org>
Date:   Mon Mar 16 15:50:51 2009 +0100

    netfilter: ctnetlink: fix crash during expectation creation
    
    This patch fixes a possible crash due to the missing initialization
    of the expectation class when nf_ct_expect_related() is called.
    
    Reported-by: BORBELY Zoltan <bozo@andrews.hu>
    Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
    Signed-off-by: Patrick McHardy <kaber@trash.net>

diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c
index cb78aa0..ed6d873 100644
--- a/net/netfilter/nf_conntrack_netlink.c
+++ b/net/netfilter/nf_conntrack_netlink.c
@@ -1780,6 +1780,7 @@ ctnetlink_create_expect(struct nlattr *cda[], u_int8_t u3, u32 pid, int report)
 		goto out;
 	}
 
+	exp->class = 0;
 	exp->expectfn = NULL;
 	exp->flags = 0;
 	exp->master = ct;