Fix screencast proxy bus name

Without this, the fix for CVE-2024-34397 would break the screen
recorder.

Resolves: RHEL-36166

gnome-shell.spec

@@ -23,6 +23,9 @@ Patch: optional-portal-helper.patch
 # downstream patch to stop trying on configuration errors.
 Patch: 0001-gdm-Work-around-failing-fingerprint-auth.patch
 
+# https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/3303
+Patch: screencast-bus-name.patch
+
 # GDM/Lock stuff
 Patch: 0001-screenShield-unblank-when-inserting-smartcard.patch
 Patch: enforce-smartcard-at-unlock.patch

screencast-bus-name.patch

@@ -0,0 +1,34 @@
+From 50a011a19dcc6997ea6173c07bb80b2d9888d363 Mon Sep 17 00:00:00 2001
+From: Simon McVittie <smcv@debian.org>
+Date: Mon, 6 May 2024 21:58:09 +0100
+Subject: [PATCH] screencast: Correct expected bus name for streams
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Previously, this only worked because GDBusConnection was not filtering
+signals by their sender correctly (GNOME/glib#3268).
+
+Thanks: Alicia Boya García
+Signed-off-by: Simon McVittie <smcv@debian.org>
+Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/3303>
+---
+ js/dbusServices/screencast/screencastService.js | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/js/dbusServices/screencast/screencastService.js b/js/dbusServices/screencast/screencastService.js
+index d664a51b083..0645811fa0a 100644
+--- a/js/dbusServices/screencast/screencastService.js
++++ b/js/dbusServices/screencast/screencastService.js
+@@ -340,7 +340,7 @@ class Recorder extends Signals.EventEmitter {
+                 });
+ 
+             this._streamProxy = new ScreenCastStreamProxy(Gio.DBus.session,
+-                'org.gnome.ScreenCast.Stream',
++                'org.gnome.Mutter.ScreenCast',
+                 streamPath);
+ 
+             this._streamProxy.connectSignal('PipeWireStreamAdded',
+-- 
+GitLab
+