From patchwork Mon Jul 4 01:52:00 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Coiby Xu X-Patchwork-Id: 12904563 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 12D6CCCA473 for ; Mon, 4 Jul 2022 01:53:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233196AbiGDBxD (ORCPT ); Sun, 3 Jul 2022 21:53:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35886 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233044AbiGDBwv (ORCPT ); Sun, 3 Jul 2022 21:52:51 -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 6ABCC63BE for ; Sun, 3 Jul 2022 18:52:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1656899567; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=EE8ReJL35xooYMRcL0aldhKZVhFpWy3F9pc1cYwfnGA=; b=GaZgby1b4wzEbeutmrcHXSdq/a7Kui1peUS3Wd8R4k3Dx84nQC8w1ZT2ePa33gOVJ/t9N1 OWnn03W5wrykZQhXaEuZ6gxKA3Ejma23NjII9TU4ggPOZ6w2qQqV2YXJ9wgrBWjjvH3tzw hGO402LzH66J4g49epP6DkCpAv2vIBk= Received: from mail-pl1-f199.google.com (mail-pl1-f199.google.com [209.85.214.199]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-321-BxgUw3ZwOBWjpivvGryiVA-1; Sun, 03 Jul 2022 21:52:46 -0400 X-MC-Unique: BxgUw3ZwOBWjpivvGryiVA-1 Received: by mail-pl1-f199.google.com with SMTP id q8-20020a17090311c800b0016a125c933fso4297076plh.4 for ; Sun, 03 Jul 2022 18:52:46 -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=EE8ReJL35xooYMRcL0aldhKZVhFpWy3F9pc1cYwfnGA=; b=2oxl+0SMVr7efEbeAP92qwJgsnzBy710qLvY2BFP8AesUXxh0fENt57QWvUQQJ3O7d v4HHfB0RCr0zr7GbhjZLubyDF57TMuZG0WUOxheefSIcyAxRc8ZRLNz/unDUra74LYXn pQB17FYZx11KQBat9W/zFwQvys2kRlgUSZKqqzixp8k4jl4XMbviiSCki1m5zJu8aNAM 91F7/G81xWi+Fewx6jCbfujc7InMc5da9aL2ltuz/8Mkdjg802QFe9nkMq/b+oG/1IBb gpFFDzU59zo1+wW0NlBBrZeXegMvMuXaJsj3qqdaqGHoBcuYgKi1DcSVYKyjDNST18bn P8tQ== X-Gm-Message-State: AJIora+jJ1fyeBACNdDDtC7DKkZpz9Ef7+Qe/1ZGCa9pY2X+IHoJxsqA VKHYaobPZcSWkJ8R+0R4HCITF1F3WoDYqohr53SfibGD0kOyhJKnNcPTU4OkTv5uUTQoor5UVR0 YBDMniHnzQJewVIAaNmINn7E//qdl7TqUMwZR X-Received: by 2002:a17:90b:4d01:b0:1ef:54e4:f840 with SMTP id mw1-20020a17090b4d0100b001ef54e4f840mr19512602pjb.216.1656899565264; Sun, 03 Jul 2022 18:52:45 -0700 (PDT) X-Google-Smtp-Source: AGRyM1vccVgOsoxySyE6jc8B09IaJFFIALoQ7zprfH6mR3bc+DIDyQRm0eLU55vBwyS03zmcKniWuQ== X-Received: by 2002:a17:90b:4d01:b0:1ef:54e4:f840 with SMTP id mw1-20020a17090b4d0100b001ef54e4f840mr19512561pjb.216.1656899564976; Sun, 03 Jul 2022 18:52:44 -0700 (PDT) Received: from localhost ([209.132.188.80]) by smtp.gmail.com with ESMTPSA id c12-20020a621c0c000000b0050dc7628178sm19752005pfc.82.2022.07.03.18.52.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 03 Jul 2022 18:52:44 -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 , stable@vger.kernel.org, keyrings@vger.kernel.org, linux-security-module@vger.kernel.org, Catalin Marinas , AKASHI Takahiro , James Morse , linux-kernel@vger.kernel.org (open list) Subject: [PATCH v9 3/4] arm64: kexec_file: use more system keyrings to verify kernel image signature Date: Mon, 4 Jul 2022 09:52:00 +0800 Message-Id: <20220704015201.59744-4-coxu@redhat.com> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20220704015201.59744-1-coxu@redhat.com> References: <20220704015201.59744-1-coxu@redhat.com> MIME-Version: 1.0 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=coxu@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Precedence: bulk List-ID: Currently, when loading a kernel image via the kexec_file_load() system call, arm64 can only use the .builtin_trusted_keys keyring to verify a signature whereas x86 can use three more keyrings i.e. .secondary_trusted_keys, .machine and .platform keyrings. For example, one resulting problem is kexec'ing a kernel image would be rejected with the error "Lockdown: kexec: kexec of unsigned images is restricted; see man kernel_lockdown.7". This patch set enables arm64 to make use of the same keyrings as x86 to verify the signature kexec'ed kernel image. Fixes: 732b7b93d849 ("arm64: kexec_file: add kernel signature verification support") Cc: stable@vger.kernel.org # 34d5960af253: kexec: clean up arch_kexec_kernel_verify_sig Cc: stable@vger.kernel.org # 83b7bb2d49ae: kexec, KEYS: make the code in bzImage64_verify_sig generic Acked-by: Baoquan He Cc: kexec@lists.infradead.org Cc: keyrings@vger.kernel.org Cc: linux-security-module@vger.kernel.org Co-developed-by: Michal Suchanek Signed-off-by: Michal Suchanek Acked-by: Will Deacon Signed-off-by: Coiby Xu --- arch/arm64/kernel/kexec_image.c | 11 +---------- 1 file changed, 1 insertion(+), 10 deletions(-) diff --git a/arch/arm64/kernel/kexec_image.c b/arch/arm64/kernel/kexec_image.c index 9ec34690e255..5ed6a585f21f 100644 --- a/arch/arm64/kernel/kexec_image.c +++ b/arch/arm64/kernel/kexec_image.c @@ -14,7 +14,6 @@ #include #include #include -#include #include #include #include @@ -130,18 +129,10 @@ static void *image_load(struct kimage *image, return NULL; } -#ifdef CONFIG_KEXEC_IMAGE_VERIFY_SIG -static int image_verify_sig(const char *kernel, unsigned long kernel_len) -{ - return verify_pefile_signature(kernel, kernel_len, NULL, - VERIFYING_KEXEC_PE_SIGNATURE); -} -#endif - const struct kexec_file_ops kexec_image_ops = { .probe = image_probe, .load = image_load, #ifdef CONFIG_KEXEC_IMAGE_VERIFY_SIG - .verify_sig = image_verify_sig, + .verify_sig = kexec_kernel_verify_pe_sig, #endif };