From 0744149cdabd85d632822ff810d3994787bca4b7 Mon Sep 17 00:00:00 2001
From: Behdad Esfahbod <behdad@behdad.org>
Date: Sat, 2 Dec 2017 15:06:15 -0800
Subject: [PATCH] [set] Protect against bad input in hb_set_add_range()

---
 src/hb-set-private.hh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/hb-set-private.hh b/src/hb-set-private.hh
index a47b17a3..2b459756 100644
--- a/src/hb-set-private.hh
+++ b/src/hb-set-private.hh
@@ -217,7 +217,7 @@ struct hb_set_t
   }
   inline void add_range (hb_codepoint_t a, hb_codepoint_t b)
   {
-    if (unlikely (in_error)) return;
+    if (unlikely (in_error || a > b)) return;
     unsigned int ma = get_major (a);
     unsigned int mb = get_major (b);
     if (ma == mb)
-- 
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