|
 |
27a4da |
From 57dd7429fb1a865f483723e865bd7e3729a299e4 Mon Sep 17 00:00:00 2001
|
|
|
27a4da |
From: Laszlo Ersek <lersek@redhat.com>
|
|
|
27a4da |
Date: Mon, 21 Nov 2016 15:34:00 +0100
|
|
|
27a4da |
Subject: [PATCH 227/260] efi/chainloader: fix wrong sanity check in
|
|
|
27a4da |
relocate_coff()
|
|
|
27a4da |
|
|
|
27a4da |
In relocate_coff(), the relocation entries are parsed from the original
|
|
|
27a4da |
image (not the section-wise copied image). The original image is
|
|
|
27a4da |
pointed-to by the "orig" pointer. The current check
|
|
|
27a4da |
|
|
|
27a4da |
(void *)reloc_end < data
|
|
|
27a4da |
|
|
|
27a4da |
compares the addresses of independent memory allocations. "data" is a typo
|
|
|
27a4da |
here, it should be "orig".
|
|
|
27a4da |
|
|
|
27a4da |
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1347291
|
|
|
27a4da |
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
|
|
|
27a4da |
Tested-by: Bogdan Costescu <bcostescu@gmail.com>
|
|
|
27a4da |
Tested-by: Juan Orti <j.orti.alcaine@gmail.com>
|
|
|
27a4da |
---
|
|
|
27a4da |
grub-core/loader/efi/chainloader.c | 2 +-
|
|
|
27a4da |
1 file changed, 1 insertion(+), 1 deletion(-)
|
|
|
27a4da |
|
|
|
27a4da |
diff --git a/grub-core/loader/efi/chainloader.c b/grub-core/loader/efi/chainloader.c
|
|
|
27a4da |
index 3e89de900..ed8c36478 100644
|
|
|
27a4da |
--- a/grub-core/loader/efi/chainloader.c
|
|
|
27a4da |
+++ b/grub-core/loader/efi/chainloader.c
|
|
|
27a4da |
@@ -401,7 +401,7 @@ relocate_coff (pe_coff_loader_image_context_t *context,
|
|
|
27a4da |
reloc_end = (struct grub_pe32_fixup_block *)
|
|
|
27a4da |
((char *)reloc_base + reloc_base->size);
|
|
|
27a4da |
|
|
|
27a4da |
- if ((void *)reloc_end < data || (void *)reloc_end > image_end)
|
|
|
27a4da |
+ if ((void *)reloc_end < orig || (void *)reloc_end > image_end)
|
|
|
27a4da |
{
|
|
|
27a4da |
grub_error (GRUB_ERR_BAD_ARGUMENT, "Reloc entry %d overflows binary",
|
|
|
27a4da |
n);
|
|
|
27a4da |
--
|
|
|
27a4da |
2.13.0
|
|
|
27a4da |
|