2023-02-14 09:03:28 +00:00
|
|
|
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
|
|
|
|
From: Peter Jones <pjones@redhat.com>
|
|
|
|
|
Date: Tue, 11 Oct 2022 17:00:50 -0400
|
|
|
|
|
Subject: [PATCH] x86-efi: Fix an incorrect array size in kernel allocation
|
|
|
|
|
|
|
|
|
|
In 81a6ebf62bbe166ddc968463df2e8bd481bf697c ("efi: split allocation
|
|
|
|
|
policy for kernel vs initrd memories."), I introduced a split in the
|
|
|
|
|
kernel allocator to allow for different dynamic policies for the kernel
|
|
|
|
|
and the initrd allocations.
|
|
|
|
|
|
|
|
|
|
Unfortunately, that change increased the size of the policy data used to
|
|
|
|
|
make decisions, but did not change the size of the temporary storage we
|
|
|
|
|
use to back it up and restore. This results in some of .data getting
|
|
|
|
|
clobbered at runtime, and hilarity ensues.
|
|
|
|
|
|
|
|
|
|
This patch makes the size of the backup storage be based on the size of
|
|
|
|
|
the initial policy data.
|
|
|
|
|
|
|
|
|
|
Signed-off-by: Peter Jones <pjones@redhat.com>
|
|
|
|
|
---
|
|
|
|
|
grub-core/loader/i386/efi/linux.c | 2 +-
|
|
|
|
|
1 file changed, 1 insertion(+), 1 deletion(-)
|
|
|
|
|
|
|
|
|
|
diff --git a/grub-core/loader/i386/efi/linux.c b/grub-core/loader/i386/efi/linux.c
|
2023-04-11 14:25:15 +00:00
|
|
|
index ac5ef50bdb..9854b0defa 100644
|
2023-02-14 09:03:28 +00:00
|
|
|
--- a/grub-core/loader/i386/efi/linux.c
|
|
|
|
|
+++ b/grub-core/loader/i386/efi/linux.c
|
2023-04-11 14:25:15 +00:00
|
|
|
@@ -92,7 +92,7 @@ static struct allocation_choice max_addresses[] =
|
2023-02-14 09:03:28 +00:00
|
|
|
{ INITRD_MEM, GRUB_EFI_MAX_ALLOCATION_ADDRESS, GRUB_EFI_ALLOCATE_MAX_ADDRESS },
|
|
|
|
|
{ NO_MEM, 0, 0 }
|
|
|
|
|
};
|
|
|
|
|
-static struct allocation_choice saved_addresses[4];
|
|
|
|
|
+static struct allocation_choice saved_addresses[sizeof(max_addresses) / sizeof(max_addresses[0])];
|
|
|
|
|
|
|
|
|
|
#define save_addresses() grub_memcpy(saved_addresses, max_addresses, sizeof(max_addresses))
|
|
|
|
|
#define restore_addresses() grub_memcpy(max_addresses, saved_addresses, sizeof(max_addresses))
|
