From b301a4c43f19c984e9e7232d964dc6212d35e0d6 Mon Sep 17 00:00:00 2001
From: sarveshkumarv3 <86755931+sarveshkumarv3@users.noreply.github.com>
Date: Mon, 15 Jul 2024 11:17:09 -0700
Subject: [PATCH] [settings] reset the platform settings file descriptor once
 closed (#10512)

On platform settings deinit, the file descriptor is closed but the
variable is not reset, which can lead to calling close on a stale fd
leading to bad file descriptor error in case the API is invoked
multiple times.
---
 src/posix/platform/settings.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/posix/platform/settings.cpp b/src/posix/platform/settings.cpp
index 3b4c2fd56..8ef12ffab 100644
--- a/src/posix/platform/settings.cpp
+++ b/src/posix/platform/settings.cpp
@@ -232,6 +232,7 @@ void otPlatSettingsDeinit(otInstance *aInstance)
 
     VerifyOrExit(sSettingsFd != -1);
     VerifyOrDie(close(sSettingsFd) == 0, OT_EXIT_ERROR_ERRNO);
+    sSettingsFd = -1;
 
 exit:
     return;