diff --git a/security/yama/yama_lsm.c b/security/yama/yama_lsm.c
index 7c3591a..927e6ad 100644
--- a/security/yama/yama_lsm.c
+++ b/security/yama/yama_lsm.c
@@ -82,7 +82,7 @@ static void yama_ptracer_del(struct task_struct *tracer,
 	struct ptrace_relation *relation;
 	struct list_head *list, *safe;
 
-	spin_lock(&ptracer_relations_lock);
+	spin_lock_bh(&ptracer_relations_lock);
 	list_for_each_safe(list, safe, &ptracer_relations) {
 		relation = list_entry(list, struct ptrace_relation, node);
 		if (relation->tracee == tracee ||
@@ -91,7 +91,7 @@ static void yama_ptracer_del(struct task_struct *tracer,
 			kfree(relation);
 		}
 	}
-	spin_unlock(&ptracer_relations_lock);
+	spin_unlock_bh(&ptracer_relations_lock);
 }
 
 /**