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| author | Dave Young <dyoung@redhat.com> | 2013-12-20 18:02:15 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-02-06 11:33:51 -0800 |
| commit | 965918eb863be707d548683b5165cfb30deb8d1c (patch) | |
| tree | 2068328e4f758e2b516a33e7cebd27385e0a0911 /arch | |
| parent | 0c51097273237d079ef67aa819e904e484e382ca (diff) | |
| download | lwn-965918eb863be707d548683b5165cfb30deb8d1c.tar.gz lwn-965918eb863be707d548683b5165cfb30deb8d1c.zip | |
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch')
| -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 cceb813044ef..30075f91040c 100644 --- a/arch/x86/platform/efi/efi.c +++ b/arch/x86/platform/efi/efi.c @@ -436,7 +436,7 @@ void __init efi_reserve_boot_services(void) * - 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)) { |