From f4151f12db32cd3ed26c24327de714bf2c3ed6ca Mon Sep 17 00:00:00 2001
From: Zdenek Hutyra <zhutyra@centrum.cz>
Date: Tue, 23 Jul 2024 11:48:39 +0100
Subject: [PATCH] PostScript interpreter - fix buffer length check

Bug 707895

See bug report for details.

CVE-2024-46956
---
 psi/zfile.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/psi/zfile.c b/psi/zfile.c
index a4f5439cd..cb056494b 100644
--- a/psi/zfile.c
+++ b/psi/zfile.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2001-2023 Artifex Software, Inc.
+/* Copyright (C) 2001-2024 Artifex Software, Inc.
    All Rights Reserved.
 
    This software is provided AS-IS with no warranty, either express or
@@ -443,7 +443,7 @@ file_continue(i_ctx_t *i_ctx_p)
         if (code == ~(uint) 0) {    /* all done */
             esp -= 6;               /* pop proc, pfen, scratch, devlen, iodev , mark */
             return o_pop_estack;
-        } else if (code > len) {      /* overran string */
+        } else if (code > len - devlen) {      /* overran string */
             return_error(gs_error_rangecheck);
         }
         else if (iodev != iodev_default(imemory)
-- 
2.39.3