From 905f0b1f5a5ae9556a1998e984c176c1880fd91e Mon Sep 17 00:00:00 2001
From: Guido Vranken <guidovranken@gmail.com>
Date: Fri, 22 Jan 2021 09:55:30 +0100
Subject: [PATCH] Fix wc_ecc_sign_hash memory leak. ZD 11556.

---
 wolfcrypt/src/ecc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/wolfcrypt/src/ecc.c b/wolfcrypt/src/ecc.c
index f625e09d5..4bc592a35 100644
--- a/wolfcrypt/src/ecc.c
+++ b/wolfcrypt/src/ecc.c
@@ -5149,6 +5149,8 @@ int wc_ecc_sign_hash(const byte* in, word32 inlen, byte* out, word32 *outlen,
     err = wc_ecc_sign_hash_ex(in, inlen, rng, key, r, s);
 #endif
     if (err < 0) {
+        mp_clear(r);
+        mp_clear(s);
     #ifdef WOLFSSL_SMALL_STACK
         XFREE(s, key->heap, DYNAMIC_TYPE_ECC);
         XFREE(r, key->heap, DYNAMIC_TYPE_ECC);