From 9bf72966ed75353442df205e82b7080fb8a7bb47 Mon Sep 17 00:00:00 2001
From: Werner Lemberg <wl@gnu.org>
Date: Thu, 14 Dec 2023 06:11:43 +0100
Subject: [PATCH] * src/truetype/ttgxvar.c (ft_var_to_normalized): Fix
 undefined left-shift.

Reported as

  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=63723
---
 src/truetype/ttgxvar.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/truetype/ttgxvar.c b/src/truetype/ttgxvar.c
index ad4f266b2..78b80782a 100644
--- a/src/truetype/ttgxvar.c
+++ b/src/truetype/ttgxvar.c
@@ -2141,7 +2141,8 @@
                                          outerIndex,
                                          innerIndex );
 
-	  v += delta << 2;
+          /* Convert to 16.16 format before adding. */
+	  v += delta * 4;
 
 	  /* Clamp value range. */
 	  v = v >=  0x10000L ?  0x10000 : v;