From 8f9c8a12032add2119053300adc474314e77f87f Mon Sep 17 00:00:00 2001
From: Andras Fekete <andras@wolfssl.com>
Date: Wed, 8 May 2024 09:52:37 -0400
Subject: [PATCH] Fix infinite loop

'ret' could be set to non-zero inside the loop and the 'cmac->bufferSz' never gets reset causing 'add' to become 0 in the subsequent loop.
---
 wolfcrypt/src/cmac.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/wolfcrypt/src/cmac.c b/wolfcrypt/src/cmac.c
index 49ab1657c..460d02a07 100644
--- a/wolfcrypt/src/cmac.c
+++ b/wolfcrypt/src/cmac.c
@@ -211,7 +211,7 @@ int wc_CmacUpdate(Cmac* cmac, const byte* in, word32 inSz)
     /* Clear CRYPTOCB_UNAVAILABLE return code */
     ret = 0;
 
-    while (inSz != 0) {
+    while ((ret == 0) && (inSz != 0)) {
         word32 add = min(inSz, AES_BLOCK_SIZE - cmac->bufferSz);
         XMEMCPY(&cmac->buffer[cmac->bufferSz], in, add);