Handle when backend fails to load/initialize

libkscreen-handle-when-backend-fails-to-load.patch

@@ -0,0 +1,36 @@
+From 069bb65af0d0059391323f9ffd2edd9162d57588 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Daniel=20Vr=C3=A1til?= <dvratil@kde.org>
+Date: Mon, 24 Feb 2020 15:12:30 +0100
+Subject: fix: handle when backend fails to load/initialize
+
+Summary:
+Fixes a null pointer dereference in GetConfigOperation when BackendManager
+fails to load a valid backend.
+
+Reviewers: #plasma
+
+Subscribers: plasma-devel
+
+Tags: #plasma
+
+Differential Revision: https://phabricator.kde.org/D27625
+---
+ src/getconfigoperation.cpp | 3 +++
+ 1 file changed, 3 insertions(+)
+
+diff --git a/src/getconfigoperation.cpp b/src/getconfigoperation.cpp
+index 4cb9afb..f985845 100644
+--- a/src/getconfigoperation.cpp
++++ b/src/getconfigoperation.cpp
+@@ -171,6 +171,9 @@ void GetConfigOperation::start()
+     Q_D(GetConfigOperation);
+     if (BackendManager::instance()->method() == BackendManager::InProcess) {
+         auto backend = d->loadBackend();
++        if (!backend) {
++            return; // loadBackend() already set error and called emitResult() for us
++        }
+         d->config = backend->config()->clone();
+         d->loadEdid(backend);
+         emitResult();
+--
+cgit v1.1

libkscreen-qt5.spec

@@ -3,7 +3,7 @@
 Name:    libkscreen-qt5
 Summary: KDE display configuration library
 Version: 5.18.2
-Release: 1%{?dist}
+Release: 2%{?dist}
 
 License: GPLv2+
 URL:     https://cgit.kde.org/%{base_name}.git
@@ -16,6 +16,7 @@ URL:     https://cgit.kde.org/%{base_name}.git
 %endif
 Source0:        http://download.kde.org/%{stable}/plasma/%{version}/%{base_name}-%{version}.tar.xz
 Patch1:         libkscreen-5.6.4-rhel-nowayland.patch
+Patch2:         libkscreen-handle-when-backend-fails-to-load.patch
 
 # filter plugin provides
 %global __provides_exclude_from ^(%{_kf5_plugindir}/.*\\.so)$
@@ -58,6 +59,7 @@ developing applications that use %{name}.
 %if 0%{?rhel} && 0%{?rhel} <= 7
 %patch1 -p1 -b .nowayland
 %endif
+%patch2 -p1 -b .handle-when-backend-fails-to-load
 
 
 %build
@@ -95,6 +97,9 @@ make install/fast DESTDIR=%{buildroot} -C %{_target_platform}
 
 
 %changelog
+* Fri Feb 28 2020 Jan Grulich <jgrulich@redhat.com> - 5.18.2-2
+- Handle when backend fails to load/initialize
+
 * Tue Feb 25 2020 Jan Grulich <jgrulich@redhat.com> - 5.18.2-1
 - 5.18.2