From patchwork Thu Jan 27 18:46:12 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Roberto Sassu X-Patchwork-Id: 12727169 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 3DE6FC433EF for ; Thu, 27 Jan 2022 18:46:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238208AbiA0Sqe (ORCPT ); Thu, 27 Jan 2022 13:46:34 -0500 Received: from frasgout.his.huawei.com ([185.176.79.56]:4534 "EHLO frasgout.his.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236489AbiA0Sqc (ORCPT ); Thu, 27 Jan 2022 13:46:32 -0500 Received: from fraeml714-chm.china.huawei.com (unknown [172.18.147.207]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4Jl8bk6DQ8z67N6L; Fri, 28 Jan 2022 02:42:58 +0800 (CST) Received: from roberto-ThinkStation-P620.huawei.com (10.204.63.22) by fraeml714-chm.china.huawei.com (10.206.15.33) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.21; Thu, 27 Jan 2022 19:46:30 +0100 From: Roberto Sassu To: CC: , , , , , Roberto Sassu Subject: [RFC][PATCH v3a 08/11] fsverity: Completely disable signature verification if not requested Date: Thu, 27 Jan 2022 19:46:12 +0100 Message-ID: <20220127184614.2837938-4-roberto.sassu@huawei.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20220127184614.2837938-1-roberto.sassu@huawei.com> References: <20220127184614.2837938-1-roberto.sassu@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.204.63.22] X-ClientProxiedBy: lhreml754-chm.china.huawei.com (10.201.108.204) To fraeml714-chm.china.huawei.com (10.206.15.33) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-integrity@vger.kernel.org Currently, fsverity verifies the signature, if supplied, regardless of whether signature verification is requested or not. Completely disable signature verification, if not requested, so that other users of fsverity can do their own verification without relying on the fsverity-specific verification to work. Signed-off-by: Roberto Sassu --- fs/verity/signature.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/fs/verity/signature.c b/fs/verity/signature.c index 143a530a8008..b45a2cea6c59 100644 --- a/fs/verity/signature.c +++ b/fs/verity/signature.c @@ -45,13 +45,13 @@ int fsverity_verify_signature(const struct fsverity_info *vi, struct fsverity_formatted_digest *d; int err; - if (sig_size == 0) { - if (fsverity_require_signatures) { - fsverity_err(inode, - "require_signatures=1, rejecting unsigned file!"); - return -EPERM; - } + if (!fsverity_require_signatures) return 0; + + if (sig_size == 0) { + fsverity_err(inode, + "require_signatures=1, rejecting unsigned file!"); + return -EPERM; } d = kzalloc(sizeof(*d) + hash_alg->digest_size, GFP_KERNEL);