fix memory leaks

src/internal.c

@@ -7993,6 +7993,11 @@ void SSL_ResourceFree(WOLFSSL* ssl)
     }
     FreeSuites(ssl);
     FreeHandshakeHashes(ssl);
+#ifdef HAVE_ECH
+    /* try to free the ech hashes in case we errored out */
+    ssl->hsHashes = ssl->hsHashesEch;
+    FreeHandshakeHashes(ssl);
+#endif
     XFREE(ssl->buffers.domainName.buffer, ssl->heap, DYNAMIC_TYPE_DOMAIN);
 
     /* clear keys struct after session */

src/tls.c

@@ -11808,6 +11808,9 @@ static int TLSX_ECH_Parse(WOLFSSL* ssl, const byte* readBuf, word16 size,
         /* set the ech payload of the copy to zeros */
         XMEMSET(aadCopy + (readBuf_p - ech->aad), 0,
             ech->innerClientHelloLen + AES_BLOCK_SIZE);
+        /* free the old ech in case this is our second client hello */
+        if (ech->innerClientHello != NULL)
+            XFREE(ech->innerClientHello, ssl->heap, DYNAMIC_TYPE_TMP_BUFFER);
         /* allocate the inner payload buffer */
         ech->innerClientHello =
             (byte*)XMALLOC(ech->innerClientHelloLen + HANDSHAKE_HEADER_SZ,