From 2bd0d4c467001f72d50f45977a500cea4e5e3369 Mon Sep 17 00:00:00 2001
From: Daniel Pouzzner <douzzer@wolfssl.com>
Date: Mon, 28 Dec 2020 23:49:48 -0600
Subject: [PATCH] wolfcrypt/src/evp.c: fix wolfSSL_EVP_CipherUpdate_GCM() to
 not fail when inl is zero, to properly handle realloc implementations that
 return NULL for zero-size allocations.

---
 wolfcrypt/src/evp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/wolfcrypt/src/evp.c b/wolfcrypt/src/evp.c
index 6ef7214ca..01844cc7e 100644
--- a/wolfcrypt/src/evp.c
+++ b/wolfcrypt/src/evp.c
@@ -580,7 +580,7 @@ static int wolfSSL_EVP_CipherUpdate_GCM(WOLFSSL_EVP_CIPHER_CTX *ctx,
     *outl = inl;
     if (out) {
         /* Buffer input for one-shot API */
-        if (ret == 0) {
+        if (inl > 0) {
             byte* tmp;
             tmp = (byte*)XREALLOC(ctx->gcmBuffer,
                     ctx->gcmBufferLen + inl, NULL,