From ce1415ed2ce15305356cd028bcf7b9bc688d6d5c Mon Sep 17 00:00:00 2001
From: Shane Lontis <shane.lontis@oracle.com>
Date: Tue, 19 Mar 2019 09:58:09 +1000
Subject: Added NULL check to BN_clear() & BN_CTX_end()

Reviewed-by: Paul Dale <paul.dale@oracle.com>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/8518)
---
 crypto/bn/bn_lib.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'crypto/bn/bn_lib.c')

diff --git a/crypto/bn/bn_lib.c b/crypto/bn/bn_lib.c
index 6de17c3b7a..17293ede34 100644
--- a/crypto/bn/bn_lib.c
+++ b/crypto/bn/bn_lib.c
@@ -338,6 +338,8 @@ void BN_swap(BIGNUM *a, BIGNUM *b)
 
 void BN_clear(BIGNUM *a)
 {
+    if (a == NULL)
+        return;
     bn_check_top(a);
     if (a->d != NULL)
         OPENSSL_cleanse(a->d, sizeof(*a->d) * a->dmax);
-- 
cgit v1.2.3