[NETFILTER]: Wait for untracked references in nf_conntrack module unload
Patrick McHardy [Mon, 5 Dec 2005 21:36:50 +0000 (13:36 -0800)]
Noticed by Pablo Neira <pablo@eurodev.net>.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/netfilter/nf_conntrack_core.c

index 1da6783..a7c7b49 100644 (file)
@@ -1383,6 +1383,9 @@ void nf_conntrack_cleanup(void)
                schedule();
                goto i_see_dead_people;
        }
+       /* wait until all references to nf_conntrack_untracked are dropped */
+       while (atomic_read(&nf_conntrack_untracked.ct_general.use) > 1)
+               schedule();
 
        for (i = 0; i < NF_CT_F_NUM; i++) {
                if (nf_ct_cache[i].use == 0)