From a08ce5b9c01ae635d5d01bbc8f4175c07b1dd52f Mon Sep 17 00:00:00 2001
From: Parag Nemade <pnemade@fedoraproject.org>
Date: Mon, 25 Sep 2023 14:03:27 +0530
Subject: [PATCH] Resolves:RHEL-8400 Add missing patch file

---
 ...it_how_far_we_skip_when_looking_back.patch | 20 +++++++++++++++++++
 1 file changed, 20 insertions(+)
 create mode 100644 CVE-2023-25193-Limit_how_far_we_skip_when_looking_back.patch

diff --git a/CVE-2023-25193-Limit_how_far_we_skip_when_looking_back.patch b/CVE-2023-25193-Limit_how_far_we_skip_when_looking_back.patch
new file mode 100644
index 0000000..5d4af58
--- /dev/null
+++ b/CVE-2023-25193-Limit_how_far_we_skip_when_looking_back.patch
@@ -0,0 +1,20 @@
+diff -urN harfbuzz-1.7.5.old/src/hb-ot-layout-gsubgpos-private.hh harfbuzz-1.7.5/src/hb-ot-layout-gsubgpos-private.hh
+--- harfbuzz-1.7.5.old/src/hb-ot-layout-gsubgpos-private.hh	2018-01-27 07:43:07.000000000 +0530
++++ harfbuzz-1.7.5/src/hb-ot-layout-gsubgpos-private.hh	2023-09-25 12:18:00.277228938 +0530
+@@ -368,7 +368,15 @@
+     inline bool prev (void)
+     {
+       assert (num_items > 0);
+-      while (idx >= num_items)
++      unsigned stop = num_items - 1;
++
++      /* When looking back, limit how far we search; this function is mostly
++       * used for looking back for base glyphs when attaching marks. If we
++       * don't limit, we can get O(n^2) behavior where n is the number of
++       * consecutive marks. */
++      stop = (unsigned) ((int) stop >= (int) idx - HB_MAX_CONTEXT_LENGTH ? stop : (int) idx - HB_MAX_CONTEXT_LENGTH);
++
++      while (idx > stop)
+       {
+ 	idx--;
+ 	const hb_glyph_info_t &info = c->buffer->out_info[idx];