From patchwork Fri Mar 6 17:39:20 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nayna Jain X-Patchwork-Id: 1250500 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 48Yvzm5hJXz9sPK for ; Sat, 7 Mar 2020 04:41:08 +1100 (AEDT) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.ibm.com Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 48Yvzm582ZzDrR7 for ; Sat, 7 Mar 2020 04:41:08 +1100 (AEDT) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=linux.ibm.com (client-ip=148.163.158.5; helo=mx0a-001b2d01.pphosted.com; envelope-from=nayna@linux.ibm.com; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.ibm.com Received: from mx0a-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 48Yvy74HJYzDqll for ; Sat, 7 Mar 2020 04:39:43 +1100 (AEDT) Received: from pps.filterd (m0098416.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 026Hb8kI045408 for ; Fri, 6 Mar 2020 12:39:40 -0500 Received: from e06smtp01.uk.ibm.com (e06smtp01.uk.ibm.com [195.75.94.97]) by mx0b-001b2d01.pphosted.com with ESMTP id 2ykmr6q1sr-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Fri, 06 Mar 2020 12:39:40 -0500 Received: from localhost by e06smtp01.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Fri, 6 Mar 2020 17:39:37 -0000 Received: from d06av22.portsmouth.uk.ibm.com (d06av22.portsmouth.uk.ibm.com [9.149.105.58]) by b06cxnps3075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 026HdZia58130484 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 6 Mar 2020 17:39:35 GMT Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 97D424C04E; Fri, 6 Mar 2020 17:39:35 +0000 (GMT) Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 54BEC4C046; Fri, 6 Mar 2020 17:39:33 +0000 (GMT) Received: from swastik.ibm.com (unknown [9.160.48.59]) by d06av22.portsmouth.uk.ibm.com (Postfix) with ESMTP; Fri, 6 Mar 2020 17:39:33 +0000 (GMT) From: Nayna Jain To: linux-integrity@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-efi@vger.kernel.org, linux-s390@vger.kernel.org Subject: [PATCH v3] ima: add a new CONFIG for loading arch-specific policies Date: Fri, 6 Mar 2020 12:39:20 -0500 X-Mailer: git-send-email 1.8.3.1 X-TM-AS-GCONF: 00 x-cbid: 20030617-4275-0000-0000-000003A90C33 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 20030617-4276-0000-0000-000038BE1F86 Message-Id: <1583516360-22016-1-git-send-email-nayna@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138, 18.0.572 definitions=2020-03-06_06:2020-03-06, 2020-03-06 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 clxscore=1015 malwarescore=0 bulkscore=0 adultscore=0 impostorscore=0 mlxlogscore=999 priorityscore=1501 mlxscore=0 suspectscore=0 lowpriorityscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2001150001 definitions=main-2003060112 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Nayna Jain , linux-kernel@vger.kernel.org, zohar@linux.ibm.com, Philipp Rudo , Ard Biesheuvel Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" Every time a new architecture defines the IMA architecture specific functions - arch_ima_get_secureboot() and arch_ima_get_policy(), the IMA include file needs to be updated. To avoid this "noise", this patch defines a new IMA Kconfig IMA_SECURE_AND_OR_TRUSTED_BOOT option, allowing the different architectures to select it. Suggested-by: Linus Torvalds Signed-off-by: Nayna Jain Cc: Ard Biesheuvel Cc: Philipp Rudo Cc: Michael Ellerman --- v3: * Updated and tested the patch with improvements suggested by Michael. It now uses "imply" instead of "select". Thanks Michael. * Have missed replacing the CONFIG_IMA in x86 and s390 with new config, that was resulting in redefinition when the IMA_SECURE_AND_OR_TRUSTED_BOOT is not enabled. Thanks to Mimi for recognizing the problem. v2: * Fixed the issue identified by Mimi. Thanks Mimi, Ard, Heiko and Michael for discussing the fix. arch/powerpc/Kconfig | 1 + arch/s390/Kconfig | 1 + arch/s390/kernel/Makefile | 2 +- arch/x86/Kconfig | 1 + arch/x86/kernel/Makefile | 2 +- include/linux/ima.h | 3 +-- security/integrity/ima/Kconfig | 8 ++++++++ 7 files changed, 14 insertions(+), 4 deletions(-) diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 497b7d0b2d7e..a5cfde432983 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -979,6 +979,7 @@ config PPC_SECURE_BOOT bool depends on PPC_POWERNV depends on IMA_ARCH_POLICY + select IMA_SECURE_AND_OR_TRUSTED_BOOT help Systems with firmware secure boot enabled need to define security policies to extend secure boot to the OS. This config allows a user diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index 8abe77536d9d..4a502fbcb800 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -195,6 +195,7 @@ config S390 select ARCH_HAS_FORCE_DMA_UNENCRYPTED select SWIOTLB select GENERIC_ALLOCATOR + select IMA_SECURE_AND_OR_TRUSTED_BOOT if IMA_ARCH_POLICY config SCHED_OMIT_FRAME_POINTER diff --git a/arch/s390/kernel/Makefile b/arch/s390/kernel/Makefile index 2b1203cf7be6..578a6fa82ea4 100644 --- a/arch/s390/kernel/Makefile +++ b/arch/s390/kernel/Makefile @@ -70,7 +70,7 @@ obj-$(CONFIG_JUMP_LABEL) += jump_label.o obj-$(CONFIG_KEXEC_FILE) += machine_kexec_file.o kexec_image.o obj-$(CONFIG_KEXEC_FILE) += kexec_elf.o -obj-$(CONFIG_IMA) += ima_arch.o +obj-$(CONFIG_IMA_SECURE_AND_OR_TRUSTED_BOOT) += ima_arch.o obj-$(CONFIG_PERF_EVENTS) += perf_event.o perf_cpum_cf_common.o obj-$(CONFIG_PERF_EVENTS) += perf_cpum_cf.o perf_cpum_sf.o diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index beea77046f9b..7f5bfaf0cbd2 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -230,6 +230,7 @@ config X86 select VIRT_TO_BUS select X86_FEATURE_NAMES if PROC_FS select PROC_PID_ARCH_STATUS if PROC_FS + select IMA_SECURE_AND_OR_TRUSTED_BOOT if EFI && IMA_ARCH_POLICY config INSTRUCTION_DECODER def_bool y diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile index 9b294c13809a..7f131ceba136 100644 --- a/arch/x86/kernel/Makefile +++ b/arch/x86/kernel/Makefile @@ -155,5 +155,5 @@ ifeq ($(CONFIG_X86_64),y) endif ifdef CONFIG_EFI -obj-$(CONFIG_IMA) += ima_arch.o +obj-$(CONFIG_IMA_SECURE_AND_OR_TRUSTED_BOOT) += ima_arch.o endif diff --git a/include/linux/ima.h b/include/linux/ima.h index 1659217e9b60..aefe758f4466 100644 --- a/include/linux/ima.h +++ b/include/linux/ima.h @@ -30,8 +30,7 @@ extern void ima_kexec_cmdline(const void *buf, int size); extern void ima_add_kexec_buffer(struct kimage *image); #endif -#if (defined(CONFIG_X86) && defined(CONFIG_EFI)) || defined(CONFIG_S390) \ - || defined(CONFIG_PPC_SECURE_BOOT) +#ifdef CONFIG_IMA_SECURE_AND_OR_TRUSTED_BOOT extern bool arch_ima_get_secureboot(void); extern const char * const *arch_get_ima_policy(void); #else diff --git a/security/integrity/ima/Kconfig b/security/integrity/ima/Kconfig index 3f3ee4e2eb0d..2baaf196c6d8 100644 --- a/security/integrity/ima/Kconfig +++ b/security/integrity/ima/Kconfig @@ -327,3 +327,11 @@ config IMA_QUEUE_EARLY_BOOT_KEYS depends on IMA_MEASURE_ASYMMETRIC_KEYS depends on SYSTEM_TRUSTED_KEYRING default y + +config IMA_SECURE_AND_OR_TRUSTED_BOOT + bool + depends on IMA_ARCH_POLICY + default n + help + This option is selected by architectures to enable secure and/or + trusted boot based on IMA runtime policies.