From f4fcf3f96fddf269870fa91c87ad6f4c86c662b5 Mon Sep 17 00:00:00 2001
From: Armin Novak <anovak@thincast.com>
Date: Mon, 11 Dec 2023 09:32:17 +0100
Subject: [PATCH] [client,sdl] fix crash #9627

lock SDL context while recreating window structures.
---
 client/SDL/sdl_freerdp.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/client/SDL/sdl_freerdp.cpp b/client/SDL/sdl_freerdp.cpp
index 5debc604d..360bc8a82 100644
--- a/client/SDL/sdl_freerdp.cpp
+++ b/client/SDL/sdl_freerdp.cpp
@@ -524,11 +524,13 @@ static BOOL sdl_desktop_resize(rdpContext* context)
 	rdpSettings* settings;
 	auto sdl = get_context(context);
 
+	WINPR_ASSERT(sdl);
 	WINPR_ASSERT(context);
 
 	settings = context->settings;
 	WINPR_ASSERT(settings);
 
+	std::lock_guard<CriticalSection> lock(sdl->critical);
 	gdi = context->gdi;
 	if (!gdi_resize(gdi, freerdp_settings_get_uint32(settings, FreeRDP_DesktopWidth),
 	                freerdp_settings_get_uint32(settings, FreeRDP_DesktopHeight)))