From patchwork Tue Sep 6 10:41:05 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Evgeniy Baskov X-Patchwork-Id: 603190 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4BC20C6FA83 for ; Tue, 6 Sep 2022 10:42:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239358AbiIFKl6 (ORCPT ); Tue, 6 Sep 2022 06:41:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56738 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234083AbiIFKlp (ORCPT ); Tue, 6 Sep 2022 06:41:45 -0400 Received: from mail.ispras.ru (mail.ispras.ru [83.149.199.84]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DB5E85F135; Tue, 6 Sep 2022 03:41:43 -0700 (PDT) Received: from localhost.localdomain (unknown [83.149.199.65]) by mail.ispras.ru (Postfix) with ESMTPSA id 352AB407624D; Tue, 6 Sep 2022 10:41:38 +0000 (UTC) From: Evgeniy Baskov To: Ard Biesheuvel Cc: Evgeniy Baskov , Borislav Petkov , Andy Lutomirski , Dave Hansen , Ingo Molnar , Peter Zijlstra , Thomas Gleixner , Alexey Khoroshilov , lvc-project@linuxtesting.org, x86@kernel.org, linux-efi@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org Subject: [PATCH 01/16] x86/boot: Align vmlinuz sections on page size Date: Tue, 6 Sep 2022 13:41:05 +0300 Message-Id: <27a078f43742063cc30e706b196fb5fff5d5c37e.1662459668.git.baskov@ispras.ru> X-Mailer: git-send-email 2.35.1 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-efi@vger.kernel.org To protect sections on page table level each section needs to be aligned on page size (4KB). Set sections alignment in linker script. Signed-off-by: Evgeniy Baskov --- arch/x86/boot/compressed/vmlinux.lds.S | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/x86/boot/compressed/vmlinux.lds.S b/arch/x86/boot/compressed/vmlinux.lds.S index 112b2375d021..6be90f1a1198 100644 --- a/arch/x86/boot/compressed/vmlinux.lds.S +++ b/arch/x86/boot/compressed/vmlinux.lds.S @@ -27,21 +27,27 @@ SECTIONS HEAD_TEXT _ehead = . ; } + . = ALIGN(PAGE_SIZE); .rodata..compressed : { + _compressed = .; *(.rodata..compressed) + _ecompressed = .; } + . = ALIGN(PAGE_SIZE); .text : { _text = .; /* Text */ *(.text) *(.text.*) _etext = . ; } + . = ALIGN(PAGE_SIZE); .rodata : { _rodata = . ; *(.rodata) /* read-only data */ *(.rodata.*) _erodata = . ; } + . = ALIGN(PAGE_SIZE); .data : { _data = . ; *(.data)