sctp: protocol.c call rcu_barrier() on unload.
On module unload call rcu_barrier(), this is needed as synchronize_rcu()
is not strong enough. The kmem_cache_destroy() does invoke
synchronize_rcu() but it does not provide same protection.
Signed-off-by: Jesper Dangaard Brouer <hawk@comx.dk>
Acked-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sctp/protocol.c b/net/sctp/protocol.c
index cb2c50d..79cbd47 100644
--- a/net/sctp/protocol.c
+++ b/net/sctp/protocol.c
@@ -1370,6 +1370,8 @@
sctp_proc_exit();
cleanup_sctp_mibs();
+ rcu_barrier(); /* Wait for completion of call_rcu()'s */
+
kmem_cache_destroy(sctp_chunk_cachep);
kmem_cache_destroy(sctp_bucket_cachep);
}