From 62e803b36173fd096d7ad460dd1d1db9be542593 Mon Sep 17 00:00:00 2001

From: Behdad Esfahbod <behdad@behdad.org>

Date: Wed, 1 Jun 2022 07:38:21 -0600

Subject: [PATCH 001/363] [sbix] Limit glyph extents

Fixes https://github.com/harfbuzz/harfbuzz/issues/3557

---

 src/hb-ot-color-sbix-table.hh       |   6 ++++++

 1 file changed, 6 insertions(+)

diff --git a/src/hb-ot-color-sbix-table.hh b/src/hb-ot-color-sbix-table.hh

index 9741ebd45..6efae43cd 100644

--- a/src/hb-ot-color-sbix-table.hh

+++ b/src/hb-ot-color-sbix-table.hh

@@ -298,6 +298,12 @@ struct sbix

       const PNGHeader &png = *blob->as<PNGHeader>();

+      if ((png.IHDR.height >= 65536) | (png.IHDR.width >= 65536))

+      {

+	hb_blob_destroy (blob);

+	return false;

+      }

+

       extents->x_bearing = x_offset;

       extents->y_bearing = png.IHDR.height + y_offset;

       extents->width     = png.IHDR.width;

-- 

2.36.1