From 049d817c667c7ad67ff23b284639dd09f0b91ca2 Mon Sep 17 00:00:00 2001
From: Nicolas Williams <nico@twosigma.com>
Date: Sun, 30 Jun 2019 19:49:11 -0500
Subject: [PATCH] Fix hx509_ca_tbs_free() segfault

---
 lib/hx509/ca.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/hx509/ca.c b/lib/hx509/ca.c
index c1324bb37..55fa458de 100644
--- a/lib/hx509/ca.c
+++ b/lib/hx509/ca.c
@@ -108,7 +108,8 @@ hx509_ca_tbs_free(hx509_ca_tbs *tbs)
     free_CRLDistributionPoints(&(*tbs)->crldp);
     der_free_bit_string(&(*tbs)->subjectUniqueID);
     der_free_bit_string(&(*tbs)->issuerUniqueID);
-    hx509_name_free(&(*tbs)->subject);
+    if ((*tbs)->subject)
+        hx509_name_free(&(*tbs)->subject);
     if ((*tbs)->sigalg) {
 	free_AlgorithmIdentifier((*tbs)->sigalg);
 	free((*tbs)->sigalg);