package/cups-filters: add upstream patch to fix CVE-2025-64524

Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
[Julien: add "CVE:" tag in patch]
Signed-off-by: Julien Olivain <ju.o@free.fr>
(cherry picked from commit ddde78c1bd)

package/cups-filters/0002-rastertopclx.c-Fix-infinite-loop-caused-by-crafted-f.patch

@@ -0,0 +1,84 @@
+From b03866fd2e251a6d822a5e8c807c8d47b4d2dce2 Mon Sep 17 00:00:00 2001
+From: Zdenek Dohnal <zdohnal@redhat.com>
+Date: Wed, 12 Nov 2025 16:02:20 +0100
+Subject: [PATCH] rastertopclx.c: Fix infinite loop caused by crafted file
+
+Infinite loop happened because of crafted input raster file, which led
+into heap buffer overflow of `CompressBuf` array.
+
+Based on comments there should be always some `count` when compressing
+the data, and processing of crafted file ended with offset and count
+being 0.
+
+Fixes CVE-2025-64524
+
+Upstream: https://github.com/OpenPrinting/cups-filters/commit/b03866fd2e251a6d822a5e8c807c8d47b4d2dce2
+
+CVE: CVE-2025-64524
+Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
+---
+ filter/rastertopclx.c | 25 +++++++++++++++++++++++--
+ 1 file changed, 23 insertions(+), 2 deletions(-)
+
+diff --git a/filter/rastertopclx.c b/filter/rastertopclx.c
+index 3e7c129da..1015308da 100644
+--- a/filter/rastertopclx.c
++++ b/filter/rastertopclx.c
+@@ -818,10 +818,10 @@ StartPage(ppd_file_t         *ppd,	/* I - PPD file */
+   }
+ 
+   if (header->cupsCompression)
+-    CompBuffer = malloc(DotBufferSize * 4);
++    CompBuffer = calloc(DotBufferSize * 4, sizeof(unsigned char));
+ 
+   if (header->cupsCompression >= 3)
+-    SeedBuffer = malloc(DotBufferSize);
++    SeedBuffer = calloc(DotBufferSize, sizeof(unsigned char));
+ 
+   SeedInvalid = 1;
+ 
+@@ -1152,6 +1152,13 @@ CompressData(unsigned char *line,	/* I - Data to compress */
+               seed ++;
+               count ++;
+             }
++
++	    //
++	    // Bail out if we don't have count to compress
++	    //
++
++	    if (count == 0)
++	      break;
+ 	  }
+ 
+          /*
+@@ -1245,6 +1252,13 @@ CompressData(unsigned char *line,	/* I - Data to compress */
+ 
+             count = line_ptr - start;
+ 
++	    //
++	    // Bail out if we don't have count to compress
++	    //
++
++	    if (count == 0)
++	      break;
++
+ #if 0
+             fprintf(stderr, "DEBUG: offset=%d, count=%d, comp_ptr=%p(%d of %d)...\n",
+ 	            offset, count, comp_ptr, comp_ptr - CompBuffer,
+@@ -1416,6 +1430,13 @@ CompressData(unsigned char *line,	/* I - Data to compress */
+ 
+             count = (line_ptr - start) / 3;
+ 
++	    //
++	    // Bail out if we don't have count to compress
++	    //
++
++	    if (count == 0)
++	      break;
++
+            /*
+             * Place mode 10 compression data in the buffer; each sequence
+ 	    * starts with a command byte that looks like:
+-- 
+2.47.3
+

package/cups-filters/cups-filters.mk

@@ -13,6 +13,9 @@ CUPS_FILTERS_CPE_ID_VENDOR = linuxfoundation
 # 0001-beh-backend-Use-execv-instead-of-system-CVE-2023-24805.patch
 CUPS_FILTERS_IGNORE_CVES += CVE-2023-24805
 
+# 0002-rastertopclx.c-Fix-infinite-loop-caused-by-crafted-f.patch
+CUPS_FILTERS_IGNORE_CVES += CVE-2025-64524
+
 CUPS_FILTERS_DEPENDENCIES = cups libglib2 lcms2 qpdf fontconfig freetype jpeg
 
 CUPS_FILTERS_CONF_OPTS = \