[PATCH 2.6.20 12/14] nfnetlink_log: possible NULL pointer dereference in nfulnl_recv_config()

[Michał Mirosław]

Eliminate possible NULL pointer dereference in nfulnl_recv_config().

Signed-off-by: Michał Mirosław <mirq-linux at rere.qmqm.pl>

--- linux-2.6.20/net/netfilter/nfnetlink_log.c.10	2007-02-12 17:05:14.000000000 +0100
+++ linux-2.6.20/net/netfilter/nfnetlink_log.c	2007-02-12 17:35:50.000000000 +0100
@@ -853,6 +853,9 @@ nfulnl_recv_config(struct sock *ctnl, st
 			ret = -EINVAL;
 			break;
 		}
+
+		if (!inst)
+			goto out_null;
 	} else {
 		if (!inst) {
 			UDEBUG("no config command, and no instance for "