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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Mon, 9 Mar 2020 00:57:58 -0000 Received: from d06av23.portsmouth.uk.ibm.com (d06av23.portsmouth.uk.ibm.com [9.149.105.59]) by b06avi18626390.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 0290uwXT49086812 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 9 Mar 2020 00:56:58 GMT Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 2F3EFA404D; Mon, 9 Mar 2020 00:57:57 +0000 (GMT) Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id EFCC3A4051; Mon, 9 Mar 2020 00:57:54 +0000 (GMT) Received: from swastik.ibm.com (unknown [9.160.62.221]) by d06av23.portsmouth.uk.ibm.com (Postfix) with ESMTP; Mon, 9 Mar 2020 00:57:54 +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, x86@kernel.org Cc: Ard Biesheuvel , Philipp Rudo , Michael Ellerman , zohar@linux.ibm.com, Thomas Gleixner , linux-kernel@vger.kernel.org, Nayna Jain , Nayna Jain Subject: [PATCH v3] ima: add a new CONFIG for loading arch-specific policies Date: Sun, 8 Mar 2020 20:57:51 -0400 X-Mailer: git-send-email 1.8.3.1 X-TM-AS-GCONF: 00 x-cbid: 20030900-0008-0000-0000-0000035A88E0 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 20030900-0009-0000-0000-00004A7BC6FE Message-Id: <1583715471-15525-1-git-send-email-nayna@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138,18.0.572 definitions=2020-03-08_09:2020-03-06,2020-03-08 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 priorityscore=1501 bulkscore=0 adultscore=0 mlxlogscore=999 mlxscore=0 suspectscore=0 malwarescore=0 phishscore=0 lowpriorityscore=0 clxscore=1015 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2001150001 definitions=main-2003090003 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Nayna Jain 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 Acked-by: Ard Biesheuvel Cc: Ard Biesheuvel Cc: Philipp Rudo Cc: Michael Ellerman --- v3: * Removes CONFIG_IMA dependency. Thanks Ard. * Updated the patch with improvements suggested by Michael. It now uses "imply" instead of "select". Thanks Michael. * Replaced the CONFIG_IMA in x86 and s390 with new config, else it was resulting in redefinition when the IMA_SECURE_AND_OR_TRUSTED_BOOT is not enabled. Thanks to Mimi for identifying the problem. * Removed "#ifdef EFI" check in the arch/x86/Makefile for compiling ima_arch.c file. * Ard, Thanks for your Acked-by. I have changed the arch/x86/Makefile in this version. Can you please review again and confirm ? * Rudo, Thanks for your review. I have changed arch/s390/Makefile as well. Can you also please review again ? 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 | 4 +--- include/linux/ima.h | 3 +-- security/integrity/ima/Kconfig | 7 +++++++ 7 files changed, 13 insertions(+), 6 deletions(-) diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 497b7d0b2d7e..5b9f1cba2a44 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 + imply 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..59c216af6264 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 + imply IMA_SECURE_AND_OR_TRUSTED_BOOT 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-$(CONFIG_PERF_EVENTS) += perf_cpum_cf.o perf_cpum_sf.o diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index beea77046f9b..dcf5b1729f7c 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -230,6 +230,7 @@ config X86 select VIRT_TO_BUS select X86_FEATURE_NAMES if PROC_FS select PROC_PID_ARCH_STATUS if PROC_FS + imply IMA_SECURE_AND_OR_TRUSTED_BOOT if EFI config INSTRUCTION_DECODER def_bool y diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile index 9b294c13809a..cfef37a27def 100644 --- a/arch/x86/kernel/Makefile +++ b/arch/x86/kernel/Makefile @@ -154,6 +154,4 @@ ifeq ($(CONFIG_X86_64),y) obj-y += vsmp_64.o endif -ifdef CONFIG_EFI -obj-$(CONFIG_IMA) += ima_arch.o -endif +obj-$(CONFIG_IMA_SECURE_AND_OR_TRUSTED_BOOT) += ima_arch.o 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..edde88dbe576 100644 --- a/security/integrity/ima/Kconfig +++ b/security/integrity/ima/Kconfig @@ -327,3 +327,10 @@ 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 + help + This option is selected by architectures to enable secure and/or + trusted boot based on IMA runtime policies. -- 2.17.1