File _service:tar_scm:backport-CVE-2023-46751.patch of Package ghostscript

File _service:tar_scm:backport-CVE-2023-46751.patch of Package ghostscript (Revision b2ea42ace816e18ca19dac5cc6ded613)

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From 5d2da96e81c7455338302c71a291088a8396245a Mon Sep 17 00:00:00 2001
From: Chris Liddell <chris.liddell@artifex.com>
Date: Mon, 16 Oct 2023 16:49:40 +0100
Subject: [PATCH] Bug 707264: Fix tiffsep(1) requirement for seekable output
 files

In the device initialization redesign, tiffsep and tiffsep1 lost the requirement
for the output files to be seekable.

Fixing that highlighted a problem with the error handling in
gdev_prn_open_printer_seekable() where closing the erroring file would leave a
dangling pointer, and lead to a crash.
---
 base/gdevprn.c     | 1 +
 devices/gdevtsep.c | 1 +
 2 files changed, 2 insertions(+)

diff --git a/base/gdevprn.c b/base/gdevprn.c
index 0491a3c6c..033632387 100644
--- a/base/gdevprn.c
+++ b/base/gdevprn.c
@@ -1271,6 +1271,7 @@ gdev_prn_open_printer_seekable(gx_device *pdev, bool binary_mode,
               && !IS_LIBCTX_STDERR(pdev->memory, gp_get_file(ppdev->file))) {
 
                 code = gx_device_close_output_file(pdev, ppdev->fname, ppdev->file);
+                ppdev->file = NULL;
                 if (code < 0)
                     return code;
             }
diff --git a/devices/gdevtsep.c b/devices/gdevtsep.c
index 7fd3c5518..f7a1b174b 100644
--- a/devices/gdevtsep.c
+++ b/devices/gdevtsep.c
@@ -737,6 +737,7 @@ tiffsep_initialize_device_procs(gx_device *dev)
 {
     gdev_prn_initialize_device_procs(dev);
 
+    set_dev_proc(dev, output_page, gdev_prn_output_page_seekable);
     set_dev_proc(dev, open_device, tiffsep_prn_open);
     set_dev_proc(dev, close_device, tiffsep_prn_close);
     set_dev_proc(dev, map_color_rgb, tiffsep_decode_color);
-- 
2.34.1