This is a note to let you know that I've just added the patch titled
x86/efi: Fix off-by-one bug in EFI Boot Services reservation
to the 3.12-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
x86-efi-fix-off-by-one-bug-in-efi-boot-services-reservation.patch
and it can be found in the queue-3.12 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From a7f84f03f660d93574ac88835d056c0d6468aebe Mon Sep 17 00:00:00 2001
From: Dave Young <dyoung@xxxxxxxxxx>
Date: Fri, 20 Dec 2013 18:02:15 +0800
Subject: x86/efi: Fix off-by-one bug in EFI Boot Services reservation
From: Dave Young <dyoung@xxxxxxxxxx>
commit a7f84f03f660d93574ac88835d056c0d6468aebe upstream.
Current code check boot service region with kernel text region by:
start+size >= __pa_symbol(_text)
The end of the above region should be start + size - 1 instead.
I see this problem in ovmf + Fedora 19 grub boot:
text start: 1000000 md start: 800000 md size: 800000
Signed-off-by: Dave Young <dyoung@xxxxxxxxxx>
Acked-by: Borislav Petkov <bp@xxxxxxx>
Acked-by: Toshi Kani <toshi.kani@xxxxxx>
Tested-by: Toshi Kani <toshi.kani@xxxxxx>
Signed-off-by: Matt Fleming <matt.fleming@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/x86/platform/efi/efi.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/x86/platform/efi/efi.c
+++ b/arch/x86/platform/efi/efi.c
@@ -440,7 +440,7 @@ void __init efi_reserve_boot_services(vo
* - Not within any part of the kernel
* - Not the bios reserved area
*/
- if ((start+size >= __pa_symbol(_text)
+ if ((start + size > __pa_symbol(_text)
&& start <= __pa_symbol(_end)) ||
!e820_all_mapped(start, start+size, E820_RAM) ||
memblock_is_region_reserved(start, size)) {
Patches currently in stable-queue which might be from dyoung@xxxxxxxxxx are
queue-3.12/x86-efi-fix-off-by-one-bug-in-efi-boot-services-reservation.patch
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