From patchwork Thu Jul 14 13:40:25 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Coiby Xu X-Patchwork-Id: 12917976 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 15D78C43334 for ; Thu, 14 Jul 2022 13:41:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239173AbiGNNlA (ORCPT ); Thu, 14 Jul 2022 09:41:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38388 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239219AbiGNNk7 (ORCPT ); Thu, 14 Jul 2022 09:40:59 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 24DFF61108 for ; Thu, 14 Jul 2022 06:40:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1657806058; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=gPEtVWmsQSkTQzDvP4m8a65flxiE/Nesl9xf3cgMNG8=; b=iMrdUxYj3ko9ZXPUNryovgtCIdbIYdT6qXZVYg8tlw+A7SR948Ag5JkOcR/0D0AoqCDyq0 m2xNxYr6CuVXKvCmxzwYSTdkuMZzHoHr6JcrVm0ffHYKR79duFmGDMX8x3AzO0AsLbb4DU s5jxStIOn+98ZMWc1JHN+ohbkyi4R5s= Received: from mail-pg1-f197.google.com (mail-pg1-f197.google.com [209.85.215.197]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-607-x3GBnA2iMRq-6Mcj7SZm-g-1; Thu, 14 Jul 2022 09:40:57 -0400 X-MC-Unique: x3GBnA2iMRq-6Mcj7SZm-g-1 Received: by mail-pg1-f197.google.com with SMTP id g67-20020a636b46000000b0040e64eee874so1268025pgc.4 for ; Thu, 14 Jul 2022 06:40:56 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=gPEtVWmsQSkTQzDvP4m8a65flxiE/Nesl9xf3cgMNG8=; b=XEwiaaQHX+nHmwPfqwiGw+GprKa6JOyHHuY979vHiGTQjT2JiHiyxUfz+UWKWfde8y Yn5Z3ShciCTwCtHNGRFqALRQFvIGiA5q1vTCFmao8JVx/wOXcAK2tz2kXTIfXgwIxV+u 2ziKOCJxbKIyAg6UjwcI6ziIQbhR8xKKxmMnjoOOeH10EY+83nsx70FcpF4FJSrOR/wQ tplTdaJ40dpusox3fapguuU7v1NbrtHsJOFiQ7S28YO5m5gymbclxa3UwzPQir0qAv1n IT9fjo3jJ2GS1ZbJoSZHTzktvBnjG+o+0WK/PjRaVE0Q0vPpdJQyypsWts85hxx1Eneq OyeQ== X-Gm-Message-State: AJIora/MYO5jp4OkBOnMtNd3TF5SjixEDBvaYcJcMDg2JzJYvrqawUBw HfdQQMXxBjeGGJrrwUjfVdIn00lCn3GlRH5+eDqQySPhZQV6PxoYZJCE15Nhxeot9NMPxj/0lyp D8Gchq7I57x78709OMIWNAOkeczoD X-Received: by 2002:a05:6a00:228e:b0:52b:13d2:2627 with SMTP id f14-20020a056a00228e00b0052b13d22627mr6669616pfe.42.1657806055740; Thu, 14 Jul 2022 06:40:55 -0700 (PDT) X-Google-Smtp-Source: AGRyM1usVuR3eLQo75Dg0fkD9sxT+ABvKFZxKK5KiUodEx1pCPVlWbqKhxgcrRbiImMlDhzyfN0trw== X-Received: by 2002:a05:6a00:228e:b0:52b:13d2:2627 with SMTP id f14-20020a056a00228e00b0052b13d22627mr6669586pfe.42.1657806055485; Thu, 14 Jul 2022 06:40:55 -0700 (PDT) Received: from localhost ([209.132.188.80]) by smtp.gmail.com with ESMTPSA id z15-20020aa79f8f000000b00518a473265csm1651851pfr.217.2022.07.14.06.40.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 14 Jul 2022 06:40:53 -0700 (PDT) From: Coiby Xu To: kexec@lists.infradead.org, linux-integrity@vger.kernel.org Cc: Mimi Zohar , linux-arm-kernel@lists.infradead.org, Michal Suchanek , Baoquan He , Dave Young , Will Deacon , "Eric W . Biederman" , Chun-Yi Lee , keyrings@vger.kernel.org, linux-security-module@vger.kernel.org, Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org (maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)), "H. Peter Anvin" , linux-kernel@vger.kernel.org (open list:X86 ARCHITECTURE (32-BIT AND 64-BIT)) Subject: [PATCH v10 2/4] kexec, KEYS: make the code in bzImage64_verify_sig generic Date: Thu, 14 Jul 2022 21:40:25 +0800 Message-Id: <20220714134027.394370-3-coxu@redhat.com> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20220714134027.394370-1-coxu@redhat.com> References: <20220714134027.394370-1-coxu@redhat.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-integrity@vger.kernel.org commit 278311e417be ("kexec, KEYS: Make use of platform keyring for signature verify") adds platform keyring support on x86 kexec but not arm64. The code in bzImage64_verify_sig uses the keys on the .builtin_trusted_keys, .machine, if configured and enabled, .secondary_trusted_keys, also if configured, and .platform keyrings to verify the signed kernel image as PE file. Cc: kexec@lists.infradead.org Cc: keyrings@vger.kernel.org Cc: linux-security-module@vger.kernel.org Reviewed-by: Michal Suchanek Signed-off-by: Coiby Xu --- arch/x86/kernel/kexec-bzimage64.c | 20 +------------------- include/linux/kexec.h | 7 +++++++ kernel/kexec_file.c | 17 +++++++++++++++++ 3 files changed, 25 insertions(+), 19 deletions(-) diff --git a/arch/x86/kernel/kexec-bzimage64.c b/arch/x86/kernel/kexec-bzimage64.c index 170d0fd68b1f..f299b48f9c9f 100644 --- a/arch/x86/kernel/kexec-bzimage64.c +++ b/arch/x86/kernel/kexec-bzimage64.c @@ -17,7 +17,6 @@ #include #include #include -#include #include #include @@ -528,28 +527,11 @@ static int bzImage64_cleanup(void *loader_data) return 0; } -#ifdef CONFIG_KEXEC_BZIMAGE_VERIFY_SIG -static int bzImage64_verify_sig(const char *kernel, unsigned long kernel_len) -{ - int ret; - - ret = verify_pefile_signature(kernel, kernel_len, - VERIFY_USE_SECONDARY_KEYRING, - VERIFYING_KEXEC_PE_SIGNATURE); - if (ret == -ENOKEY && IS_ENABLED(CONFIG_INTEGRITY_PLATFORM_KEYRING)) { - ret = verify_pefile_signature(kernel, kernel_len, - VERIFY_USE_PLATFORM_KEYRING, - VERIFYING_KEXEC_PE_SIGNATURE); - } - return ret; -} -#endif - const struct kexec_file_ops kexec_bzImage64_ops = { .probe = bzImage64_probe, .load = bzImage64_load, .cleanup = bzImage64_cleanup, #ifdef CONFIG_KEXEC_BZIMAGE_VERIFY_SIG - .verify_sig = bzImage64_verify_sig, + .verify_sig = kexec_kernel_verify_pe_sig, #endif }; diff --git a/include/linux/kexec.h b/include/linux/kexec.h index 6e7510f39368..bf24e7fce1fc 100644 --- a/include/linux/kexec.h +++ b/include/linux/kexec.h @@ -19,6 +19,7 @@ #include #include +#include /* Location of a reserved region to hold the crash kernel. */ @@ -212,6 +213,12 @@ static inline void *arch_kexec_kernel_image_load(struct kimage *image) } #endif +#ifdef CONFIG_KEXEC_SIG +#ifdef CONFIG_SIGNED_PE_FILE_VERIFICATION +int kexec_kernel_verify_pe_sig(const char *kernel, unsigned long kernel_len); +#endif +#endif + extern int kexec_add_buffer(struct kexec_buf *kbuf); int kexec_locate_mem_hole(struct kexec_buf *kbuf); diff --git a/kernel/kexec_file.c b/kernel/kexec_file.c index 6dc1294c90fc..a7b411c22f19 100644 --- a/kernel/kexec_file.c +++ b/kernel/kexec_file.c @@ -123,6 +123,23 @@ void kimage_file_post_load_cleanup(struct kimage *image) } #ifdef CONFIG_KEXEC_SIG +#ifdef CONFIG_SIGNED_PE_FILE_VERIFICATION +int kexec_kernel_verify_pe_sig(const char *kernel, unsigned long kernel_len) +{ + int ret; + + ret = verify_pefile_signature(kernel, kernel_len, + VERIFY_USE_SECONDARY_KEYRING, + VERIFYING_KEXEC_PE_SIGNATURE); + if (ret == -ENOKEY && IS_ENABLED(CONFIG_INTEGRITY_PLATFORM_KEYRING)) { + ret = verify_pefile_signature(kernel, kernel_len, + VERIFY_USE_PLATFORM_KEYRING, + VERIFYING_KEXEC_PE_SIGNATURE); + } + return ret; +} +#endif + static int kexec_image_verify_sig(struct kimage *image, void *buf, unsigned long buf_len) {