fix loading of CIDFonts (#2137856)

ghostscript-9.56.1-Deal-with-different-VM-modes-during-CIDFont-loading.patch

@@ -0,0 +1,88 @@
+From 0b74b65ecc0f36d40b8d04a7fa1fa8b5f9d2b3ff Mon Sep 17 00:00:00 2001
+From: Chris Liddell <chris.liddell@artifex.com>
+Date: Thu, 13 Oct 2022 14:55:28 +0100
+Subject: [PATCH] Deal with different VM modes during CIDFont loading
+
+To help differentiate between a substituted CIDFont and an embedded one, a
+change was made to store the file path in the CIDFont dictionary. That change
+failed to account for the possibility that the file object and the CIDFont
+dictionary may not be in compatible VM modes.
+
+This adds code to ensure that the string holding the path is in a suitable VM
+mode to be stored into the dictionary.
+
+Reported by Richard Lescak <rlescak@redhat.com>
+---
+ Resource/Init/gs_cidfn.ps | 23 +++++++++++++++++++----
+ 1 file changed, 19 insertions(+), 4 deletions(-)
+
+diff --git a/Resource/Init/gs_cidfn.ps b/Resource/Init/gs_cidfn.ps
+index 870a2e11c..fa050ed7a 100644
+--- a/Resource/Init/gs_cidfn.ps
++++ b/Resource/Init/gs_cidfn.ps
+@@ -1,4 +1,4 @@
+-% Copyright (C) 2001-2021 Artifex Software, Inc.
++% Copyright (C) 2001-2022 Artifex Software, Inc.
+ % All Rights Reserved.
+ %
+ % This software is provided AS-IS with no warranty, either express or
+@@ -36,6 +36,17 @@
+ 
+ 30 dict begin
+ 
++/.gcompatstringcopy % <string> <global> .gcompatstringcopy <string>
++{
++   dup 2 index gcheck eq
++   { pop }
++   {
++       currentglobal 3 1 roll setglobal
++       dup length string copy
++       exch setglobal
++   } ifelse
++} bind def
++
+ % The key in .cidfonttypes is the CIDFontType value;
+ % the value is a procedure that takes a font name and the CIDFont dictionary
+ % and replaces the latter with a real font.
+@@ -58,7 +69,7 @@ dup 0 {
+     end
+   } if
+   1 index exch .buildfont9
+-  .currentresourcefile dup type /filetype eq { //.filename {1 index exch /ResourcePath exch put} if }{ pop} ifelse
++  .currentresourcefile dup type /filetype eq { //.filename {1 index gcheck //.gcompatstringcopy exec 1 index exch /ResourcePath exch put} if }{ pop} ifelse
+   exch pop
+ } put % Don't bind it here, because gs_fapi.ps redefines .buildfont9
+ 
+@@ -138,10 +149,11 @@ dup 0 {
+ 
+ % ------ CIDFontType 1 (FontType 10) ------ %
+ 
++
+ dup 1 {
+   10 //.checkfonttype exec pop
+   1 index exch .buildfont10
+-  .currentresourcefile dup type /filetype eq { //.filename {1 index exch /ResourcePath exch put} if }{ pop} ifelse
++  .currentresourcefile dup type /filetype eq { //.filename {1 index gcheck //.gcompatstringcopy exec 1 index exch /ResourcePath exch put} if }{ pop} ifelse
+   exch pop
+ } put % Don't bind it here because gs_fapi.ps redefines .buildfont10
+ 
+@@ -150,12 +162,15 @@ dup 1 {
+ dup 2 {
+   11 //.checkfonttype exec pop
+   1 index exch .buildfont11
+-  .currentresourcefile dup type /filetype eq { //.filename {1 index exch /ResourcePath exch put} if }{ pop} ifelse
++  .currentresourcefile dup type /filetype eq { //.filename {1 index gcheck //.gcompatstringcopy exec 1 index exch /ResourcePath exch put} if }{ pop} ifelse
+   exch pop
+ } put % Don't bind it here because gs_fapi.ps redefines .buildfont11
+ 
++currentdict /.gcompatstringcopy .undef
++
+ pop		% .cidfonttypes
+ 
++
+ % ---------------- Reading CIDFontType 0 files ---------------- %
+ 
+ /StartData {		% <(Binary)|(Hex)> <datalength> StartData -
+-- 
+2.37.3
+

ghostscript.spec

@@ -45,7 +45,7 @@
 Name:             ghostscript
 Summary:          Interpreter for PostScript language & PDF
 Version:          9.56.1
-Release:          4%{?dist}
+Release:          5%{?dist}
 
 License:          AGPLv3+
 
@@ -106,6 +106,7 @@ BuildRequires:    make
 Patch000: ghostscript-9.56-fix-PDFFitPage-with-square-MediaBox.patch
 Patch001: ghostscript-9.56.1-Fix-color-info-juggling-with-x11-devices.patch
 Patch002: ghostscript-9.56.1-use-proper-bounds-check-for-subfunctions-of.patch
+Patch003: ghostscript-9.56.1-Deal-with-different-VM-modes-during-CIDFont-loading.patch
 
 # Downstream patches -- these should be always included when doing rebase:
 # ------------------
@@ -436,6 +437,9 @@ done
 # =============================================================================
 
 %changelog
+* Thu Oct 27 2022 Richard Lescak <rlescak@redhat.com> - 9.56.1-5
+- fix loading of CIDFonts (#2137856)
+
 * Wed Oct 19 2022 Michael J Gruber <mjg@fedoraproject.org> - 9.56.1-4
 - fix specifix shading subfunction handling