From f6806966478c601a96e1f3e0e5e85cf5036555c0 Mon Sep 17 00:00:00 2001
From: Zhang Boyang <zhangboyang.id@gmail.com>
Date: Mon, 5 Dec 2022 19:29:37 +0800
Subject: font: Assign null_font to unknown_glyph

Like glyphs in ascii_font_glyph[], assign null_font to
unknown_glyph->font in order to prevent grub_font_get_*() from
dereferencing NULL pointer.

Reference:https://git.savannah.gnu.org/cgit/grub.git/commit?id=f6806966478c601a96e1f3e0e5e85cf5036555c0
Conflict:NA

Signed-off-by: Zhang Boyang <zhangboyang.id@gmail.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
---
 grub-core/font/font.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/grub-core/font/font.c b/grub-core/font/font.c
index 19a47f8..674043d 100644
--- a/grub-core/font/font.c
+++ b/grub-core/font/font.c
@@ -177,6 +177,7 @@ grub_font_loader_init (void)
   unknown_glyph->offset_x = 0;
   unknown_glyph->offset_y = -3;
   unknown_glyph->device_width = 8;
+  unknown_glyph->font = &null_font;
   grub_memcpy (unknown_glyph->bitmap,
 	       unknown_glyph_bitmap, sizeof (unknown_glyph_bitmap));
 
-- 
cgit v1.1