From 0a17a0b3b704be24cb7af95da3a2a2fe17cbd6f7 Mon Sep 17 00:00:00 2001
From: Jeffrey Altman <jaltman@secure-endpoints.com>
Date: Sun, 23 Jan 2022 21:47:58 -0500
Subject: [PATCH] lib/asn1: der_put_length test 'size' is non-NULL

Change-Id: I1ffbf1998485fdca7cf151c24c440fb0b35e77e4
---
 lib/asn1/der_put.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/lib/asn1/der_put.c b/lib/asn1/der_put.c
index 6c4aa9d65..a9c485e3b 100644
--- a/lib/asn1/der_put.c
+++ b/lib/asn1/der_put.c
@@ -199,14 +199,16 @@ der_put_integer64 (unsigned char *p, size_t len, const int64_t *v, size_t *size)
 int ASN1CALL
 der_put_length (unsigned char *p, size_t len, size_t val, size_t *size)
 {
-    *size = 0;
+    if (size)
+	*size = 0;
 
     if (len < 1)
 	return ASN1_OVERFLOW;
 
     if (val < 128) {
 	*p = val;
-	*size = 1;
+	if (size)
+	    *size = 1;
     } else {
 	size_t l = 0;