From d4a5808b5e5e31596c6bb0129a55da837d635f49 Mon Sep 17 00:00:00 2001
From: tb <tb@openbsd.org>
Date: Thu, 5 May 2022 19:46:36 +0000
Subject: [PATCH] Avoid malloc(0) in EVP_PKEY_CTX_set1_hkdf_key()

ok jsing
---
 lib/libcrypto/kdf/hkdf_evp.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/libcrypto/kdf/hkdf_evp.c b/lib/libcrypto/kdf/hkdf_evp.c
index b334c4a32dc..dd796657786 100644
--- a/lib/libcrypto/kdf/hkdf_evp.c
+++ b/lib/libcrypto/kdf/hkdf_evp.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: hkdf_evp.c,v 1.16 2022/05/05 19:44:23 tb Exp $ */
+/*	$OpenBSD: hkdf_evp.c,v 1.17 2022/05/05 19:46:36 tb Exp $ */
 /* ====================================================================
  * Copyright (c) 2016-2018 The OpenSSL Project.  All rights reserved.
  *
@@ -132,7 +132,7 @@ pkey_hkdf_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
 		return 1;
 
 	case EVP_PKEY_CTRL_HKDF_KEY:
-		if (p1 < 0)
+		if (p1 <= 0)
 			return 0;
 
 		if (kctx->key != NULL)
-- 
2.20.1