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From faca60df7686a9a3ad9693e8a7b2c6a3a823d133 Mon Sep 17 00:00:00 2001
From: Zhang Boyang <zhangboyang.id@gmail.com>
Date: Mon, 5 Dec 2022 19:29:38 +0800
Subject: font: Reject fonts with negative max_char_width or max_char_height
If max_char_width or max_char_height are negative wrong values can be propagated
by grub_font_get_max_char_width() or grub_font_get_max_char_height(). Prevent
this from happening.
Reference:https://git.savannah.gnu.org/cgit/grub.git/commit?id=faca60df7686a9a3ad9693e8a7b2c6a3a823d133
Conflict:NA
Signed-off-by: Zhang Boyang <zhangboyang.id@gmail.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
---
grub-core/font/font.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/grub-core/font/font.c b/grub-core/font/font.c
index 674043d..24adcb3 100644
--- a/grub-core/font/font.c
+++ b/grub-core/font/font.c
@@ -644,8 +644,8 @@ grub_font_load (const char *filename)
font->max_char_width, font->max_char_height, font->num_chars);
#endif
- if (font->max_char_width == 0
- || font->max_char_height == 0
+ if (font->max_char_width <= 0
+ || font->max_char_height <= 0
|| font->num_chars == 0
|| font->char_index == 0 || font->ascent == 0 || font->descent == 0)
{
--
cgit v1.1
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