From b5c2172f59f42934b76e4ac607f2c7ef4f049bb4 Mon Sep 17 00:00:00 2001
From: Werner Lemberg <wl@gnu.org>
Date: Fri, 7 Jan 2022 06:53:44 +0100
Subject: [PATCH] [sfnt] Avoid 'runtime error: applying zero offset to null
 pointer'.

* src/sfnt/ttsbit.c (tt_sbit_decoder_load_byte_aligned): Exit early if
`line` is NULL.
---
 src/sfnt/ttsbit.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/sfnt/ttsbit.c b/src/sfnt/ttsbit.c
index e9ba697db..615e23d9f 100644
--- a/src/sfnt/ttsbit.c
+++ b/src/sfnt/ttsbit.c
@@ -730,6 +730,9 @@
     pitch      = bitmap->pitch;
     line       = bitmap->buffer;
 
+    if ( !line )
+      goto Exit;
+
     width  = decoder->metrics->width;
     height = decoder->metrics->height;