diff options
| author | Dave Young <dyoung@redhat.com> | 2013-12-20 18:02:15 +0800 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2014-04-02 00:58:40 +0100 |
| commit | 4eee0d12bad290f9d0b8a76165b38fc287ce3303 (patch) | |
| tree | 5cad1bf53656e695338514c93efdba01c7e39b34 /arch/x86 | |
| parent | 88939e54e5687e9a4dd5d36126788158b8bee545 (diff) | |
x86/efi: Fix off-by-one bug in EFI Boot Services reservation
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@redhat.com>
Acked-by: Borislav Petkov <bp@suse.de>
Acked-by: Toshi Kani <toshi.kani@hp.com>
Tested-by: Toshi Kani <toshi.kani@hp.com>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
[bwh: Backported to 3.2: s/__pa_symbol/virt_to_phys/]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/platform/efi/efi.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c index bee75a6052a..e56da773f50 100644 --- a/arch/x86/platform/efi/efi.c +++ b/arch/x86/platform/efi/efi.c @@ -424,7 +424,7 @@ void __init efi_reserve_boot_services(void) * - Not within any part of the kernel * - Not the bios reserved area */ - if ((start+size >= virt_to_phys(_text) + if ((start + size > virt_to_phys(_text) && start <= virt_to_phys(_end)) || !e820_all_mapped(start, start+size, E820_RAM) || memblock_x86_check_reserved_size(&start, &size, |