From 9b96f49505daf0d43ea28bc58920d55c4ac3b30c Mon Sep 17 00:00:00 2001
From: JacobBarthelmeh <jacob@wolfssl.com>
Date: Mon, 16 Mar 2026 00:07:09 -0600
Subject: [PATCH] check return value of fwrite in test case

---
 tests/api.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/tests/api.c b/tests/api.c
index b6037309da..635eff2096 100644
--- a/tests/api.c
+++ b/tests/api.c
@@ -33583,7 +33583,10 @@ static int test_lms_write_key(const byte* priv, word32 privSz, void* context)
     FILE* f = fopen((const char*)context, "wb");
     if (f == NULL)
         return -1;
-    fwrite(priv, 1, privSz, f);
+    if (fwrite(priv, 1, privSz, f) != privSz) {
+        fclose(f);
+        return -1;
+    }
     fclose(f);
     return WC_LMS_RC_SAVED_TO_NV_MEMORY;
 }