Author: Julia Lawall <Julia.Lawall@lip6.fr> for_each_matching_node() performs an of_node_get() on each iteration, so a break out of the loop requires an of_node_put(). A simplified version of the semantic patch that fixes this problem is as follows (http://coccinelle.lip6.fr): // @@ local idexpression n; expression e; @@ for_each_matching_node(n,…) { … ( of_node_put(n); | e = n | + …