From f6dc2ba3c9d12be53057b9371f5109ec553a399f Mon Sep 17 00:00:00 2001
From: Darren Tucker <dtucker@dtucker.net>
Date: Fri, 16 Feb 2018 17:32:28 +1100
Subject: [PATCH] freezero should check for NULL.

---
 openbsd-compat/freezero.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/openbsd-compat/freezero.c b/openbsd-compat/freezero.c
index ca5de785b..90b9d3813 100644
--- a/openbsd-compat/freezero.c
+++ b/openbsd-compat/freezero.c
@@ -23,6 +23,8 @@
 void
 freezero(void *ptr, size_t sz)
 {
+	if (ptr == NULL)
+		return;
 	explicit_bzero(ptr, sz);
 	free(ptr);
 }