From ba358b8fb8614c14fba09dc7216ce25420ba6a0d Mon Sep 17 00:00:00 2001
From: Hideki Miyazaki <hide@wolfssl.com>
Date: Thu, 17 Jul 2025 18:51:57 +0900
Subject: [PATCH] Sanity check before free

---
 wolfcrypt/src/port/Renesas/renesas_tsip_util.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/wolfcrypt/src/port/Renesas/renesas_tsip_util.c b/wolfcrypt/src/port/Renesas/renesas_tsip_util.c
index b9c7536da..2e57ba085 100644
--- a/wolfcrypt/src/port/Renesas/renesas_tsip_util.c
+++ b/wolfcrypt/src/port/Renesas/renesas_tsip_util.c
@@ -308,8 +308,10 @@ int tsip_TlsCleanup(struct WOLFSSL* ssl)
     /* free stored messages */
     tsipFlushMessages(ssl);
     /* free internal structure */
-    XFREE(tuc->internal, ssl->heap, DYNAMIC_TYPE_TMP_BUFFER);
-    tuc->internal = NULL;
+    if (tuc->internal) {
+        XFREE(tuc->internal, ssl->heap, DYNAMIC_TYPE_TMP_BUFFER);
+        tuc->internal = NULL;
+    }
 
     /* zero clear */
     ForceZero(tuc, sizeof(TsipUserCtx));