From a8de0070fd351b56895191653bf35888d0d3ab39 Mon Sep 17 00:00:00 2001
From: Frank Morgner <frankmorgner@gmail.com>
Date: Wed, 6 Nov 2019 23:38:37 +0100
Subject: [PATCH] fixed  Null-dereference READ

https://oss-fuzz.com/testcase-detail/5644373382922240
Thanks to OSS-Fuzz
---
 src/libopensc/pkcs15-prkey.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/libopensc/pkcs15-prkey.c b/src/libopensc/pkcs15-prkey.c
index ed0ce6b4..6ec339b9 100644
--- a/src/libopensc/pkcs15-prkey.c
+++ b/src/libopensc/pkcs15-prkey.c
@@ -606,6 +606,9 @@ sc_pkcs15_free_prkey(struct sc_pkcs15_prkey *key)
 
 void sc_pkcs15_free_prkey_info(sc_pkcs15_prkey_info_t *key)
 {
+	if (!key)
+		return;
+
 	if (key->subject.value)
 		free(key->subject.value);