|
 |
9723a8 |
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
|
|
9723a8 |
From: Thomas Frauendorfer | Miray Software <tf@miray.de>
|
|
|
9723a8 |
Date: Tue, 4 Aug 2020 13:49:51 +0200
|
|
|
9723a8 |
Subject: [PATCH] gfxmenu/gui: Check printf() format in the gui_progress_bar
|
|
|
9723a8 |
and gui_label
|
|
|
9723a8 |
|
|
|
9723a8 |
The gui_progress_bar and gui_label components can display the timeout
|
|
|
9723a8 |
value. The format string can be set through a theme file. This patch
|
|
|
9723a8 |
adds a validation step to the format string.
|
|
|
9723a8 |
|
|
|
9723a8 |
If a user loads a theme file into the GRUB without this patch then
|
|
|
9723a8 |
a GUI label with the following settings
|
|
|
9723a8 |
|
|
|
9723a8 |
+ label {
|
|
|
9723a8 |
...
|
|
|
9723a8 |
id = "__timeout__"
|
|
|
9723a8 |
text = "%s"
|
|
|
9723a8 |
}
|
|
|
9723a8 |
|
|
|
9723a8 |
will interpret the current timeout value as string pointer and print the
|
|
|
9723a8 |
memory at that position on the screen. It is not desired behavior.
|
|
|
9723a8 |
|
|
|
9723a8 |
Signed-off-by: Thomas Frauendorfer | Miray Software <tf@miray.de>
|
|
|
9723a8 |
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
|
|
|
9723a8 |
---
|
|
|
9723a8 |
grub-core/gfxmenu/gui_label.c | 4 ++++
|
|
|
9723a8 |
grub-core/gfxmenu/gui_progress_bar.c | 3 +++
|
|
|
9723a8 |
2 files changed, 7 insertions(+)
|
|
|
9723a8 |
|
|
|
9723a8 |
diff --git a/grub-core/gfxmenu/gui_label.c b/grub-core/gfxmenu/gui_label.c
|
|
|
b71686 |
index a4c817891..1c190542a 100644
|
|
|
9723a8 |
--- a/grub-core/gfxmenu/gui_label.c
|
|
|
9723a8 |
+++ b/grub-core/gfxmenu/gui_label.c
|
|
|
9723a8 |
@@ -193,6 +193,10 @@ label_set_property (void *vself, const char *name, const char *value)
|
|
|
9723a8 |
else if (grub_strcmp (value, "@KEYMAP_SHORT@") == 0)
|
|
|
9723a8 |
value = _("enter: boot, `e': options, `c': cmd-line");
|
|
|
9723a8 |
/* FIXME: Add more templates here if needed. */
|
|
|
9723a8 |
+
|
|
|
9723a8 |
+ if (grub_printf_fmt_check(value, "%d") != GRUB_ERR_NONE)
|
|
|
9723a8 |
+ value = ""; /* Unsupported format. */
|
|
|
9723a8 |
+
|
|
|
9723a8 |
self->template = grub_strdup (value);
|
|
|
9723a8 |
self->text = grub_xasprintf (value, self->value);
|
|
|
9723a8 |
}
|
|
|
9723a8 |
diff --git a/grub-core/gfxmenu/gui_progress_bar.c b/grub-core/gfxmenu/gui_progress_bar.c
|
|
|
b71686 |
index b128f0866..ace85a125 100644
|
|
|
9723a8 |
--- a/grub-core/gfxmenu/gui_progress_bar.c
|
|
|
9723a8 |
+++ b/grub-core/gfxmenu/gui_progress_bar.c
|
|
|
9723a8 |
@@ -348,6 +348,9 @@ progress_bar_set_property (void *vself, const char *name, const char *value)
|
|
|
9723a8 |
Please use the shortest form available in you language. */
|
|
|
9723a8 |
value = _("%ds");
|
|
|
9723a8 |
|
|
|
9723a8 |
+ if (grub_printf_fmt_check(value, "%d") != GRUB_ERR_NONE)
|
|
|
9723a8 |
+ value = ""; /* Unsupported format. */
|
|
|
9723a8 |
+
|
|
|
9723a8 |
self->template = grub_strdup (value);
|
|
|
9723a8 |
}
|
|
|
9723a8 |
else if (grub_strcmp (name, "font") == 0)
|