59 lines
2.2 KiB
Diff
59 lines
2.2 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
|
From: Thomas Frauendorfer | Miray Software <tf@miray.de>
|
|
Date: Tue, 4 Aug 2020 13:49:51 +0200
|
|
Subject: [PATCH] gfxmenu/gui: Check printf() format in the gui_progress_bar
|
|
and gui_label
|
|
|
|
The gui_progress_bar and gui_label components can display the timeout
|
|
value. The format string can be set through a theme file. This patch
|
|
adds a validation step to the format string.
|
|
|
|
If a user loads a theme file into the GRUB without this patch then
|
|
a GUI label with the following settings
|
|
|
|
+ label {
|
|
...
|
|
id = "__timeout__"
|
|
text = "%s"
|
|
}
|
|
|
|
will interpret the current timeout value as string pointer and print the
|
|
memory at that position on the screen. It is not desired behavior.
|
|
|
|
Signed-off-by: Thomas Frauendorfer | Miray Software <tf@miray.de>
|
|
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
|
|
---
|
|
grub-core/gfxmenu/gui_label.c | 4 ++++
|
|
grub-core/gfxmenu/gui_progress_bar.c | 3 +++
|
|
2 files changed, 7 insertions(+)
|
|
|
|
diff --git a/grub-core/gfxmenu/gui_label.c b/grub-core/gfxmenu/gui_label.c
|
|
index a4c817891ee..1c190542a2b 100644
|
|
--- a/grub-core/gfxmenu/gui_label.c
|
|
+++ b/grub-core/gfxmenu/gui_label.c
|
|
@@ -193,6 +193,10 @@ label_set_property (void *vself, const char *name, const char *value)
|
|
else if (grub_strcmp (value, "@KEYMAP_SHORT@") == 0)
|
|
value = _("enter: boot, `e': options, `c': cmd-line");
|
|
/* FIXME: Add more templates here if needed. */
|
|
+
|
|
+ if (grub_printf_fmt_check(value, "%d") != GRUB_ERR_NONE)
|
|
+ value = ""; /* Unsupported format. */
|
|
+
|
|
self->template = grub_strdup (value);
|
|
self->text = grub_xasprintf (value, self->value);
|
|
}
|
|
diff --git a/grub-core/gfxmenu/gui_progress_bar.c b/grub-core/gfxmenu/gui_progress_bar.c
|
|
index b128f08668e..ace85a12569 100644
|
|
--- a/grub-core/gfxmenu/gui_progress_bar.c
|
|
+++ b/grub-core/gfxmenu/gui_progress_bar.c
|
|
@@ -348,6 +348,9 @@ progress_bar_set_property (void *vself, const char *name, const char *value)
|
|
Please use the shortest form available in you language. */
|
|
value = _("%ds");
|
|
|
|
+ if (grub_printf_fmt_check(value, "%d") != GRUB_ERR_NONE)
|
|
+ value = ""; /* Unsupported format. */
|
|
+
|
|
self->template = grub_strdup (value);
|
|
}
|
|
else if (grub_strcmp (name, "font") == 0)
|