From 6cd28c326d73c0c43d04c60b86dc70250ea6ef3c Mon Sep 17 00:00:00 2001
From: "andrey.bychkov" <andrey@signalmodelling.ru>
Date: Thu, 6 Aug 2026 10:19:23 +0300
Subject: [PATCH] fix(PISerial): close fd when probe read fails in
 availableDevicesInfo

When the non-blocking probe read returned EIO, the loop continued
without closing the file descriptor, leaking one fd per rejected
port on each call.
---
 libs/main/io_devices/piserial.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libs/main/io_devices/piserial.cpp b/libs/main/io_devices/piserial.cpp
index 401d5dfc..0adecd95 100644
--- a/libs/main/io_devices/piserial.cpp
+++ b/libs/main/io_devices/piserial.cpp
@@ -1292,6 +1292,11 @@ PIVector<PISerial::DeviceInfo> PISerial::availableDevicesInfo(bool test) {
 			if (!rok) {
 				ret.remove(i);
 				--i;
+#ifdef WINDOWS
+				CloseHandle(hComm);
+#else
+				::close(fd);
+#endif
 				continue;
 			}
 #ifdef WINDOWS