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font: Assign null_font to unknown_glyph

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

Signed-off-by: Zhang Boyang <zhangboyang.id@gmail.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This commit is contained in:
Zhang Boyang 2022-12-05 19:29:37 +08:00 committed by Daniel Kiper
parent d7ed2ebcd6
commit f680696647
1 changed files with 1 additions and 0 deletions
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grub-core/font/font.c
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@ -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));