[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 <[email protected]> Signed-off-by: David S. Miller <[email protected]>
mna · Jul 22, 2005 · 21f930e · 21f930e
1 parent d04b4f8
commit 21f930e
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/net/ipv4/netfilter/ip_conntrack_core.c b/net/ipv4/netfilter/ip_conntrack_core.c
@@ -1107,6 +1107,9 @@ void ip_conntrack_cleanup(void)
 		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);