mir/0004-check-buffer-size.patch

From 73de77f186b03fea4906f4dd358deb21d5fb6889 Mon Sep 17 00:00:00 2001
From: Alan Griffiths <alan@octopull.co.uk>
Date: Thu, 20 Feb 2025 10:50:26 +0000
Subject: [PATCH] Check we have a buffer size before using it

---
 src/server/frontend_wayland/wl_data_device.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/server/frontend_wayland/wl_data_device.cpp b/src/server/frontend_wayland/wl_data_device.cpp
index 5381db1ab4d..282abe53bfa 100644
--- a/src/server/frontend_wayland/wl_data_device.cpp
+++ b/src/server/frontend_wayland/wl_data_device.cpp
@@ -374,8 +374,11 @@ mf::WlDataDevice::DragIconSurface::DragIconSurface(WlSurface* icon, std::shared_
     icon->set_role(this);
 
     auto spec = shell::SurfaceSpecification();
-    spec.width = surface.value().buffer_size()->width;
-    spec.height = surface.value().buffer_size()->height;
+    if (auto const size = surface.value().buffer_size())
+    {
+        spec.width = size->width;
+        spec.height = size->height;
+    }
     spec.streams = std::vector<shell::StreamSpecification>{};
     spec.input_shape = std::vector<Rectangle>{};
     spec.depth_layer = mir_depth_layer_overlay;