From d1907751a1ea62a54bcbc9168dba7dc7c1f2ebc6 Mon Sep 17 00:00:00 2001
From: Joni Poikelin <joni.poikelin@qt.io>
Date: Thu, 5 May 2022 13:11:53 +0300
Subject: [PATCH 037/147] Prevent crashing when FcFontList fails

FcFontList can return null pointer in failure cases which would lead to
null pointer dereference further down.

Pick-to: 5.15 6.2 6.3
Change-Id: I6b407cf2f27ead9eb471d3ee7a521468cebf7572
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@qt.io>
(cherry picked from commit 691541023aa11c085186ef7f691507c158e1df75)
---
 .../fontdatabases/fontconfig/qfontconfigdatabase.cpp            | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/platformsupport/fontdatabases/fontconfig/qfontconfigdatabase.cpp b/src/platformsupport/fontdatabases/fontconfig/qfontconfigdatabase.cpp
index 159b490ce0..00aa80cd58 100644
--- a/src/platformsupport/fontdatabases/fontconfig/qfontconfigdatabase.cpp
+++ b/src/platformsupport/fontdatabases/fontconfig/qfontconfigdatabase.cpp
@@ -567,6 +567,8 @@ void QFontconfigDatabase::populateFontDatabase()
         fonts = FcFontList(nullptr, pattern, os);
         FcObjectSetDestroy(os);
         FcPatternDestroy(pattern);
+        if (!fonts)
+            return;
     }
 
     for (int i = 0; i < fonts->nfont; i++)
-- 
2.40.1