From patchwork Thu May 12 07:01:23 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Coiby Xu X-Patchwork-Id: 12847219 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 14801C433F5 for ; Thu, 12 May 2022 07:01:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1350640AbiELHBw (ORCPT ); Thu, 12 May 2022 03:01:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35984 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1350653AbiELHBp (ORCPT ); Thu, 12 May 2022 03:01:45 -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 14FC34A3F1 for ; Thu, 12 May 2022 00:01:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1652338900; 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=Sd8cjBSOdeaVjyH4f3lxl+0xYw15nzSjwpJw6bzSgLk=; b=Uw2Xs56/rbVkF3hfep0lSCL3uoMFwBWmgN6uKmEYjQVyURjCAzcG2JKnlrgtYt/H+Mpjvu gbROAJq+mIEuW5fDX102XO34cE2nAMp7qDDjBD3I00c2bW4z4IWEl6/QBoMvCdH9x+Yalu BkzM3wjNH1Hj9hfOs50GCbVrT5AikKo= Received: from mail-pl1-f200.google.com (mail-pl1-f200.google.com [209.85.214.200]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-41-W8Nm9fxzNP2hXWqQVnlXLw-1; Thu, 12 May 2022 03:01:39 -0400 X-MC-Unique: W8Nm9fxzNP2hXWqQVnlXLw-1 Received: by mail-pl1-f200.google.com with SMTP id l4-20020a170903244400b0015ebe12a192so2290634pls.16 for ; Thu, 12 May 2022 00:01:39 -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=Sd8cjBSOdeaVjyH4f3lxl+0xYw15nzSjwpJw6bzSgLk=; b=L+rstPaAHlQRHmjS79HLAVpU1B89ClHre49KzGGAM883f1wjcNGff1IGMLsq1S8K1G L9SbAi7I+VslCAZTnoNFXVaC8HhtIczvvURecO3b+YCk2taaUwN2XQmhKlut4nQZx5mT 13OE3qWd/5v9seVKdN1W2vdDctM+K4z3K4pcD5AToHpt9oyWHXtp4ktnFbcX4NpTZ/Zk iK8XWR8ZUz/amzKx5vRQVnsoGJfEHpS6wa8UXeI++Rge7Klz3oEstxbErjFSruaRx0Qs XbwlleWX9xx7yBqdqXmv3Bh9xbFukNA2oZg8QiCOwAjRt9GzT/yvjWIq5lww+Af4bn6G nptg== X-Gm-Message-State: AOAM533wyhIf6D2LgLx6JazANLf/SP9F7Zf7GTZdOxlIeqwqj3v9JBEl DacxFh+4rFDWI30kzyW1Wg08OrCAxmOk40hMTCsfjU9rdTmm1WMZH7Fq0r+TCktiAoD1IpQ3Xkc y0T5pdaz29slrNxGkfF61uHxAQoH8wTuSw3Gi X-Received: by 2002:a63:db17:0:b0:3c1:dc15:7a6e with SMTP id e23-20020a63db17000000b003c1dc157a6emr24702560pgg.107.1652338898845; Thu, 12 May 2022 00:01:38 -0700 (PDT) X-Google-Smtp-Source: ABdhPJw5+8KvrmgP6uU2JLw0pBjP/QRQb39IFWj7HXL3olAtsPY86WH+mgk5ysySAIY64jPtk9fAOQ== X-Received: by 2002:a63:db17:0:b0:3c1:dc15:7a6e with SMTP id e23-20020a63db17000000b003c1dc157a6emr24702527pgg.107.1652338898566; Thu, 12 May 2022 00:01:38 -0700 (PDT) Received: from localhost ([240e:3a1:2e9:efa0:e73c:e550:ac9e:58fd]) by smtp.gmail.com with ESMTPSA id q9-20020a170902a3c900b0015e8d4eb22fsm3060866plb.121.2022.05.12.00.01.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 12 May 2022 00:01:38 -0700 (PDT) From: Coiby Xu To: kexec@lists.infradead.org Cc: linux-arm-kernel@lists.infradead.org, Michal Suchanek , Baoquan He , Dave Young , Will Deacon , "Eric W . Biederman" , Mimi Zohar , Chun-Yi Lee , stable@vger.kernel.org, Philipp Rudo , keyrings@vger.kernel.org, linux-security-module@vger.kernel.org, Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Martin Schwidefsky , linux-s390@vger.kernel.org (open list:S390), linux-kernel@vger.kernel.org (open list) Subject: [PATCH v8 4/4] kexec, KEYS, s390: Make use of built-in and secondary keyring for signature verification Date: Thu, 12 May 2022 15:01:23 +0800 Message-Id: <20220512070123.29486-5-coxu@redhat.com> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20220512070123.29486-1-coxu@redhat.com> References: <20220512070123.29486-1-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: From: Michal Suchanek commit e23a8020ce4e ("s390/kexec_file: Signature verification prototype") adds support for KEXEC_SIG verification with keys from platform keyring but the built-in keys and secondary keyring are not used. Add support for the built-in keys and secondary keyring as x86 does. Fixes: e23a8020ce4e ("s390/kexec_file: Signature verification prototype") Cc: stable@vger.kernel.org Cc: Philipp Rudo Cc: kexec@lists.infradead.org Cc: keyrings@vger.kernel.org Cc: linux-security-module@vger.kernel.org Signed-off-by: Michal Suchanek Reviewed-by: "Lee, Chun-Yi" Acked-by: Baoquan He Signed-off-by: Coiby Xu Acked-by: Heiko Carstens --- arch/s390/kernel/machine_kexec_file.c | 18 +++++++++++++----- 1 file changed, 13 insertions(+), 5 deletions(-) diff --git a/arch/s390/kernel/machine_kexec_file.c b/arch/s390/kernel/machine_kexec_file.c index 8f43575a4dd3..fc6d5f58debe 100644 --- a/arch/s390/kernel/machine_kexec_file.c +++ b/arch/s390/kernel/machine_kexec_file.c @@ -31,6 +31,7 @@ int s390_verify_sig(const char *kernel, unsigned long kernel_len) const unsigned long marker_len = sizeof(MODULE_SIG_STRING) - 1; struct module_signature *ms; unsigned long sig_len; + int ret; /* Skip signature verification when not secure IPLed. */ if (!ipl_secure_flag) @@ -65,11 +66,18 @@ int s390_verify_sig(const char *kernel, unsigned long kernel_len) return -EBADMSG; } - return verify_pkcs7_signature(kernel, kernel_len, - kernel + kernel_len, sig_len, - VERIFY_USE_PLATFORM_KEYRING, - VERIFYING_MODULE_SIGNATURE, - NULL, NULL); + ret = verify_pkcs7_signature(kernel, kernel_len, + kernel + kernel_len, sig_len, + VERIFY_USE_SECONDARY_KEYRING, + VERIFYING_MODULE_SIGNATURE, + NULL, NULL); + if (ret == -ENOKEY && IS_ENABLED(CONFIG_INTEGRITY_PLATFORM_KEYRING)) + ret = verify_pkcs7_signature(kernel, kernel_len, + kernel + kernel_len, sig_len, + VERIFY_USE_PLATFORM_KEYRING, + VERIFYING_MODULE_SIGNATURE, + NULL, NULL); + return ret; } #endif /* CONFIG_KEXEC_SIG */