[GIT PULL 01/14] ui/dbus: fix cursor race, copy cursor data

["Marc-André Lureau" <marcandre.lureau@redhat.com>]

Eliminates the undefined behavior where virtio-gpu's memcpy() overwrites
the buffer that an in-flight gvariant still references. Fixes the data
race where the GDBus worker thread calls cursor_unref() concurrently
with main thread.

Fixes: 142ca628a733 ("ui: add a D-Bus display backend")
Reviewed-by: Akihiko Odaki <odaki@rsg.ci.i.u-tokyo.ac.jp>
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-ID: <20260904123020.3108205-1-marcandre.lureau@redhat.com>
---
 ui/dbus-listener.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/ui/dbus-listener.c b/ui/dbus-listener.c
index c1e86648384c..624d0fb71d6b 100644
--- a/ui/dbus-listener.c
+++ b/ui/dbus-listener.c
@@ -926,13 +926,11 @@ static void dbus_cursor_define(DisplayChangeListener *dcl,
 
     ddl_discard_cursor_messages(ddl);
 
-    v_data = g_variant_new_from_data(
-        G_VARIANT_TYPE("ay"),
+    v_data = g_variant_new_fixed_array(
+        G_VARIANT_TYPE_BYTE,
         c->data,
         c->width * c->height * 4,
-        TRUE,
-        (GDestroyNotify)cursor_unref,
-        cursor_ref(c));
+        1);
 
     qemu_dbus_display1_listener_call_cursor_define(
         ddl->proxy,

-- 
2.55.0.543.g5ebe2ebe4ea8