From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DFB89C10DCE for ; Fri, 13 Mar 2020 09:05:37 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A1C342074A for ; Fri, 13 Mar 2020 09:05:37 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="Rvb0eVIl" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A1C342074A Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:Message-Id:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To: References:List-Owner; bh=sWagpVktJ+81dkZM0kNrlzaxq4wR9vp5gH6rFN89NZE=; b=Rvb 0eVIlCOjyYyiv2Khxw5MgHqYSdpjuc1BCeMKUqVrPJTlhhqCcWOov1VXd/cZwducM4UVh5hxw26re FiHBlUChadNHxZj01prjiwjCDGsabOgk9xxWXV7U5UDBX6viemsm2EVK4EDH/sYXKyqK5H4tb93Ty cLasCbzNCY7Aw62Xgri1djdwA7Shm7UVkLIhbqr6zcEvhz1zL9uY5xcupM7EtFQBWAhOVeTDfbrrW 9d4sW0ZK/zAwnZK9LALxpsHBFKNBjwiw3tUvD+4VNLmI+W1Ull7fZEtrLj7kKPRm637cgaTrub+BC n7ycca8GKGKs59+G7wu/+0Q+AbH9yow==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jCgG5-00029D-Mh; Fri, 13 Mar 2020 09:05:33 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jCgG1-00026n-Eq for linux-arm-kernel@lists.infradead.org; Fri, 13 Mar 2020 09:05:31 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 6F87531B; Fri, 13 Mar 2020 02:05:25 -0700 (PDT) Received: from a075553-lin.blr.arm.com (a075553-lin.blr.arm.com [10.162.17.32]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id A96603F67D; Fri, 13 Mar 2020 02:05:21 -0700 (PDT) From: Amit Daniel Kachhap To: linux-arm-kernel@lists.infradead.org Subject: [PATCH v7 00/17] arm64: return address signing Date: Fri, 13 Mar 2020 14:34:47 +0530 Message-Id: <1584090304-18043-1-git-send-email-amit.kachhap@arm.com> X-Mailer: git-send-email 2.7.4 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200313_020529_589441_F4674241 X-CRM114-Status: GOOD ( 16.25 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , Kees Cook , Suzuki K Poulose , Catalin Marinas , Kristina Martsenko , Dave Martin , Mark Brown , James Morse , Ramana Radhakrishnan , Amit Daniel Kachhap , Vincenzo Frascino , Will Deacon , Ard Biesheuvel MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi, This series improves function return address protection for the arm64 kernel, by compiling the kernel with ARMv8.3 Pointer Authentication instructions (referred ptrauth hereafter). This should help protect the kernel against attacks using return-oriented programming. Changes since v6 [1]: - Dropped patch "arm64: create macro to park cpu in an infinite loop" as this clean up patch is not relevant for this series. - Fixed backtrace when Function graph tracer is used as pointed by James. - Added DYNAMIC_FTRACE_WITH_REGS config dependency as pointed by James. - Several minor comments from Vincenzo. - Added Reviewed-bys from James and Vincenzo. - Rebased the patch series to v5.6-rc5. Changes since v5 [2]: - Added a new patch(arm64: cpufeature: Move cpu capability..) to move cpucapability type helpers in cpufeature.c file. This makes adding new cpucapability easier. - Moved kernel key restore to function __cpu_setup(proc.S) as suggested by Catalin. - More comments for as-option Kconfig option for concerns raised by Masahiro. - Clarified comments for -march=armv8.3-a non-integrated assembler option. Some additional work not implemented below will be taken up separately: - kdump tools may need some rework to work with ptrauth. The kdump tools may need the ptrauth information to strip PAC bits. This will be sent in a separate patch. - Few more ptrauth generic lkdtm tests as requested by Kees Cook. - Generate compile time warnings if requested Kconfig feature not supported by compilers. - KVM host will now need just APIA key to be saved and restored. Userpace should also behave according to it. More details here [3]. This complete series can be found at (git://linux-arm.org/linux-ak.git PAC_mainline_v7) for reference. Patch 5 in this series "arm64: ptrauth: Add bootup/runtime flags for __cpu_setup" will have minor conflict with Ionela's commit "87a1f063464afd9 (arm64: trap to EL1 accesses to AMU counters from EL0)" in -next. Feedback welcome! Thanks, Amit Daniel [1]: http://lists.infradead.org/pipermail/linux-arm-kernel/2020-March/716268.html [2]: http://lists.infradead.org/pipermail/linux-arm-kernel/2020-February/711699.html [3]: http://lists.infradead.org/pipermail/linux-arm-kernel/2020-March/717847.html Amit Daniel Kachhap (8): arm64: cpufeature: Fix meta-capability cpufeature check arm64: ptrauth: Add bootup/runtime flags for __cpu_setup arm64: cpufeature: Move cpu capability helpers inside C file arm64: initialize ptrauth keys for kernel booting task arm64: mask PAC bits of __builtin_return_address arm64: __show_regs: strip PAC from lr in printk arm64: suspend: restore the kernel ptrauth keys lkdtm: arm64: test kernel pointer authentication Kristina Martsenko (7): arm64: cpufeature: add pointer auth meta-capabilities arm64: rename ptrauth key structures to be user-specific arm64: install user ptrauth keys at kernel exit time arm64: cpufeature: handle conflicts based on capability arm64: enable ptrauth earlier arm64: initialize and switch ptrauth kernel keys arm64: compile the kernel with ptrauth return address signing Mark Rutland (1): arm64: unwind: strip PAC from kernel addresses Vincenzo Frascino (1): kconfig: Add support for 'as-option' arch/arm64/Kconfig | 31 ++++++++++- arch/arm64/Makefile | 11 ++++ arch/arm64/include/asm/asm_pointer_auth.h | 65 +++++++++++++++++++++ arch/arm64/include/asm/compiler.h | 24 ++++++++ arch/arm64/include/asm/cpucaps.h | 4 +- arch/arm64/include/asm/cpufeature.h | 39 +++++++------ arch/arm64/include/asm/pointer_auth.h | 50 ++++++++--------- arch/arm64/include/asm/processor.h | 3 +- arch/arm64/include/asm/smp.h | 12 ++++ arch/arm64/include/asm/stackprotector.h | 5 ++ arch/arm64/kernel/asm-offsets.c | 16 ++++++ arch/arm64/kernel/cpufeature.c | 93 +++++++++++++++++++++++-------- arch/arm64/kernel/entry.S | 6 ++ arch/arm64/kernel/head.S | 2 + arch/arm64/kernel/pointer_auth.c | 7 +-- arch/arm64/kernel/process.c | 5 +- arch/arm64/kernel/ptrace.c | 16 +++--- arch/arm64/kernel/sleep.S | 2 + arch/arm64/kernel/smp.c | 8 +++ arch/arm64/kernel/stacktrace.c | 5 +- arch/arm64/mm/proc.S | 71 +++++++++++++++++++---- drivers/misc/lkdtm/bugs.c | 36 ++++++++++++ drivers/misc/lkdtm/core.c | 1 + drivers/misc/lkdtm/lkdtm.h | 1 + include/linux/stackprotector.h | 2 +- scripts/Kconfig.include | 6 ++ 26 files changed, 422 insertions(+), 99 deletions(-) create mode 100644 arch/arm64/include/asm/asm_pointer_auth.h create mode 100644 arch/arm64/include/asm/compiler.h -- 2.7.4 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel