Fix crash with NVIDIA proprietary driver with Present

Resolves: #2046147

0001-present-Check-for-NULL-to-prevent-crash.patch

@@ -0,0 +1,43 @@
+From 94b4a3d45451d29e9539ea234ce8b5e9ed58546c Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?B=C5=82a=C5=BCej=20Szczygie=C5=82?= <spaz16@wp.pl>
+Date: Thu, 13 Jan 2022 00:47:27 +0100
+Subject: [PATCH xserver] present: Check for NULL to prevent crash
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Closes: https://gitlab.freedesktop.org/xorg/xserver/-/issues/1275
+Signed-off-by: Błażej Szczygieł <spaz16@wp.pl>
+Tested-by: Aaron Plattner <aplattner@nvidia.com>
+(cherry picked from commit 22d5818851967408bb7c903cb345b7ca8766094c)
+---
+ present/present_scmd.c | 6 ++++++
+ 1 file changed, 6 insertions(+)
+
+diff --git a/present/present_scmd.c b/present/present_scmd.c
+index 3c68e690b..11391adbb 100644
+--- a/present/present_scmd.c
++++ b/present/present_scmd.c
+@@ -168,6 +168,9 @@ present_scmd_get_crtc(present_screen_priv_ptr screen_priv, WindowPtr window)
+     if (!screen_priv->info)
+         return NULL;
+ 
++    if (!screen_priv->info->get_crtc)
++        return NULL;
++
+     return (*screen_priv->info->get_crtc)(window);
+ }
+ 
+@@ -206,6 +209,9 @@ present_flush(WindowPtr window)
+     if (!screen_priv->info)
+         return;
+ 
++    if (!screen_priv->info->flush)
++        return;
++
+     (*screen_priv->info->flush) (window);
+ }
+ 
+-- 
+2.34.1
+

xorg-x11-server.spec

@@ -46,7 +46,7 @@
 Summary:   X.Org X11 X server
 Name:      xorg-x11-server
 Version:   1.20.14
-Release:   2%{?gitdate:.%{gitdate}}%{?dist}
+Release:   3%{?gitdate:.%{gitdate}}%{?dist}
 URL:       http://www.x.org
 License:   MIT
 
@@ -96,7 +96,7 @@ Patch6: 0001-Fedora-hack-Make-the-suid-root-wrapper-always-start-.patch
 # <empty>
 
 # Backports from "master" upstream:
-# <empty>
+Patch100: 0001-present-Check-for-NULL-to-prevent-crash.patch
 
 BuildRequires: make
 BuildRequires: systemtap-sdt-devel
@@ -512,6 +512,9 @@ find %{inst_srcdir}/hw/xfree86 -name \*.c -delete
 
 
 %changelog
+* Tue Jan 25 2022 Olivier Fourdan <ofourdan@redhat.com> - 1.20.14-3
+- Fix crash with NVIDIA proprietary driver with Present (#2046147)
+
 * Sat Jan 22 2022 Fedora Release Engineering <releng@fedoraproject.org> - 1.20.14-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_36_Mass_Rebuild