[PATCH 2.6.20 04/10] nfnetlink_log: fix possible use-after-free

[Michał Mirosław]

Paranoia: instance_put() might have freed the inst pointer when we
spin_unlock_bh().

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

--- linux-2.6.20/net/netfilter/nfnetlink_log.c.2	2007-02-11 20:43:24.000000000 +0100
+++ linux-2.6.20/net/netfilter/nfnetlink_log.c	2007-02-11 20:46:33.000000000 +0100
@@ -393,8 +393,8 @@ static void nfulnl_timer(unsigned long d
 
 	spin_lock_bh(&inst->lock);
 	__nfulnl_send(inst);
-	instance_put(inst);
 	spin_unlock_bh(&inst->lock);
+	instance_put(inst);
 }
 
 /* This is an inline function, we don't really care about a long