RDS: lock rds_conn_count decrement in rds_conn_destroy()
rds_conn_destroy() can race with all other modifications of the
rds_conn_count but it was modifying the count without locking.
Signed-off-by: Zach Brown <zach.brown@oracle.com>
diff --git a/net/rds/connection.c b/net/rds/connection.c
index 0de40d9..75a1a37 100644
--- a/net/rds/connection.c
+++ b/net/rds/connection.c
@@ -313,6 +313,7 @@
void rds_conn_destroy(struct rds_connection *conn)
{
struct rds_message *rm, *rtmp;
+ unsigned long flags;
rdsdebug("freeing conn %p for %pI4 -> "
"%pI4\n", conn, &conn->c_laddr,
@@ -350,7 +351,9 @@
BUG_ON(!list_empty(&conn->c_retrans));
kmem_cache_free(rds_conn_slab, conn);
+ spin_lock_irqsave(&rds_conn_lock, flags);
rds_conn_count--;
+ spin_unlock_irqrestore(&rds_conn_lock, flags);
}
EXPORT_SYMBOL_GPL(rds_conn_destroy);
