You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
29 lines
1.1 KiB
29 lines
1.1 KiB
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
|
From: Daniel Axtens <dja@axtens.net>
|
|
Date: Tue, 6 Jul 2021 14:13:40 +1000
|
|
Subject: [PATCH] video/readers/png: Refuse to handle multiple image headers
|
|
|
|
This causes the bitmap to be leaked. Do not permit multiple image headers.
|
|
|
|
Signed-off-by: Daniel Axtens <dja@axtens.net>
|
|
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
|
|
(cherry picked from commit 8ce433557adeadbc46429aabb9f850b02ad2bdfb)
|
|
---
|
|
grub-core/video/readers/png.c | 3 +++
|
|
1 file changed, 3 insertions(+)
|
|
|
|
diff --git a/grub-core/video/readers/png.c b/grub-core/video/readers/png.c
|
|
index e2a6b1cf3c..8955b8ecfd 100644
|
|
--- a/grub-core/video/readers/png.c
|
|
+++ b/grub-core/video/readers/png.c
|
|
@@ -258,6 +258,9 @@ grub_png_decode_image_header (struct grub_png_data *data)
|
|
int color_bits;
|
|
enum grub_video_blit_format blt;
|
|
|
|
+ if (data->image_width || data->image_height)
|
|
+ return grub_error (GRUB_ERR_BAD_FILE_TYPE, "png: two image headers found");
|
|
+
|
|
data->image_width = grub_png_get_dword (data);
|
|
data->image_height = grub_png_get_dword (data);
|
|
|