[08/13] [NETFILTER]: Wait until all references to ip_conntrack_untracked are dropped on unload

[Chris Wright]

-stable review patch.  If anyone has any objections, please let us know.

------------------

[NETFILTER]: Wait until all references to ip_conntrack_untracked are dropped on unload

Fixes a crash when unloading ip_conntrack.

Signed-off-by: Patrick McHardy <kaber@xxxxxxxxx>
Signed-off-by: Chris Wright <chrisw@xxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
---
 net/ipv4/netfilter/ip_conntrack_core.c |    3 +++
 1 files changed, 3 insertions(+)

--- linux-2.6.12.3.orig/net/ipv4/netfilter/ip_conntrack_core.c	2005-07-28 11:17:01.000000000 -0700
+++ linux-2.6.12.3/net/ipv4/netfilter/ip_conntrack_core.c	2005-07-28 11:17:16.000000000 -0700
@@ -1124,6 +1124,9 @@
 		schedule();
 		goto i_see_dead_people;
 	}
+	/* wait until all references to ip_conntrack_untracked are dropped */
+	while (atomic_read(&ip_conntrack_untracked.ct_general.use) > 1)
+		schedule();
 
 	kmem_cache_destroy(ip_conntrack_cachep);
 	kmem_cache_destroy(ip_conntrack_expect_cachep);
-
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