From 0d5ac5a738094fb171f01d20375a832e797dab2e Mon Sep 17 00:00:00 2001
From: Nils Larsch <nils@openssl.org>
Date: Mon, 26 Feb 2007 18:32:53 +0000
Subject: [PATCH] allow EVP_PKEY_CTX_free(NULL)

---
 crypto/evp/pmeth_lib.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/crypto/evp/pmeth_lib.c b/crypto/evp/pmeth_lib.c
index 5b8000d691..500aad967b 100644
--- a/crypto/evp/pmeth_lib.c
+++ b/crypto/evp/pmeth_lib.c
@@ -289,6 +289,8 @@ int EVP_PKEY_meth_add0(const EVP_PKEY_METHOD *pmeth)
 
 void EVP_PKEY_CTX_free(EVP_PKEY_CTX *ctx)
 	{
+	if (ctx == NULL)
+		return;
 	if (ctx->pmeth && ctx->pmeth->cleanup)
 		ctx->pmeth->cleanup(ctx);
 	if (ctx->pkey)