From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755296AbaCaAWH (ORCPT ); Sun, 30 Mar 2014 20:22:07 -0400 Received: from shadbolt.e.decadent.org.uk ([88.96.1.126]:36315 "EHLO shadbolt.e.decadent.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752951AbaC3XZA (ORCPT ); Sun, 30 Mar 2014 19:25:00 -0400 Content-Type: text/plain; charset="UTF-8" Content-Disposition: inline Content-Transfer-Encoding: 8bit MIME-Version: 1.0 From: Ben Hutchings To: linux-kernel@vger.kernel.org, stable@vger.kernel.org CC: akpm@linux-foundation.org, "Dave Young" , "Matt Fleming" , "Borislav Petkov" , "Toshi Kani" Date: Mon, 31 Mar 2014 00:23:35 +0100 Message-ID: X-Mailer: LinuxStableQueue (scripts by bwh) Subject: [PATCH 3.2 012/200] x86/efi: Fix off-by-one bug in EFI Boot Services reservation In-Reply-To: X-SA-Exim-Connect-IP: 192.168.4.249 X-SA-Exim-Mail-From: ben@decadent.org.uk X-SA-Exim-Scanned: No (on shadbolt.decadent.org.uk); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.2.56-rc1 review patch. If anyone has any objections, please let me know. ------------------ From: Dave Young 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 Acked-by: Borislav Petkov Acked-by: Toshi Kani Tested-by: Toshi Kani Signed-off-by: Matt Fleming [bwh: Backported to 3.2: s/__pa_symbol/virt_to_phys/] Signed-off-by: Ben Hutchings --- 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 @@ -424,7 +424,7 @@ void __init efi_reserve_boot_services(vo * - 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,