From a5caf1be0170b0264dc8423119482e2e4e76e2ed Mon Sep 17 00:00:00 2001
From: Tesfa Mael <tesfa@wolfssl.com>
Date: Mon, 9 Nov 2020 08:45:48 -0800
Subject: [PATCH] Check for NULL

---
 src/ssl.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/ssl.c b/src/ssl.c
index a17f6a406..356bb4773 100644
--- a/src/ssl.c
+++ b/src/ssl.c
@@ -4307,11 +4307,13 @@ Signer* GetCA(void* vp, byte* hash)
     WOLFSSL_CERT_MANAGER* cm = (WOLFSSL_CERT_MANAGER*)vp;
     Signer* ret = NULL;
     Signer* signers;
-    word32  row = HashSigner(hash);
+    word32  row = 0;
 
-    if (cm == NULL)
+    if (cm == NULL || hash == NULL)
         return NULL;
 
+    row = HashSigner(hash);
+
     if (wc_LockMutex(&cm->caLock) != 0)
         return ret;