From patchwork Wed Apr 15 16:25:45 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Deven Bowers X-Patchwork-Id: 11491661 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id BAFEF1392 for ; Wed, 15 Apr 2020 16:27:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A2A1720737 for ; Wed, 15 Apr 2020 16:27:42 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=linux.microsoft.com header.i=@linux.microsoft.com header.b="hWUxUbYc" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1415922AbgDOQ1g (ORCPT ); Wed, 15 Apr 2020 12:27:36 -0400 Received: from linux.microsoft.com ([13.77.154.182]:49188 "EHLO linux.microsoft.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1415792AbgDOQ0C (ORCPT ); Wed, 15 Apr 2020 12:26:02 -0400 Received: from dede-linux.corp.microsoft.com (unknown [131.107.147.242]) by linux.microsoft.com (Postfix) with ESMTPSA id 8C3B120BC5ED; Wed, 15 Apr 2020 09:25:57 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 8C3B120BC5ED DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1586967957; bh=FaexFtinUGsm8rBXc8VWllMcor6Su8B/guvXMx58Nts=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=hWUxUbYcOPLCchW4WzN1E1ck/xHYVFTYTTgUE3gZjOSy79CBc+wQ6Iu0QoH4o7RHu 7zeGkQqP84AHmqdX0+ksJJ6awu78f+Ou58vGOJcL12EiRGb+6xu4I/iXbzetwlMZiQ C8ZSigFhrCZ6Zk9bmXec+KoZp/V+xxifgqi+Otck= From: deven.desai@linux.microsoft.com To: agk@redhat.com, axboe@kernel.dk, snitzer@redhat.com, jmorris@namei.org, serge@hallyn.com, zohar@linux.ibm.com, linux-integrity@vger.kernel.org, linux-security-module@vger.kernel.org, dm-devel@redhat.com, linux-block@vger.kernel.org, jannh@google.com Cc: tyhicks@linux.microsoft.com, pasha.tatashin@soleen.com, sashal@kernel.org, jaskarankhurana@linux.microsoft.com, nramas@linux.microsoft.com, mdsakib@linux.microsoft.com, linux-kernel@vger.kernel.org, corbet@lwn.net Subject: [RFC PATCH v3 07/12] dm-verity: add bdev_setsecurity hook for dm-verity signature Date: Wed, 15 Apr 2020 09:25:45 -0700 Message-Id: <20200415162550.2324-8-deven.desai@linux.microsoft.com> X-Mailer: git-send-email 2.26.0 In-Reply-To: <20200415162550.2324-1-deven.desai@linux.microsoft.com> References: <20200415162550.2324-1-deven.desai@linux.microsoft.com> MIME-Version: 1.0 Sender: owner-linux-security-module@vger.kernel.org Precedence: bulk List-ID: From: Deven Bowers Add a security hook call to set a security property of a block_device in dm-verity with the results of a verified, signed root-hash. Signed-off-by: Deven Bowers --- drivers/md/dm-verity-verify-sig.c | 7 +++++++ include/linux/device-mapper.h | 2 ++ 2 files changed, 9 insertions(+) diff --git a/drivers/md/dm-verity-verify-sig.c b/drivers/md/dm-verity-verify-sig.c index 27dac8aa2e5a..242e2421d3c8 100644 --- a/drivers/md/dm-verity-verify-sig.c +++ b/drivers/md/dm-verity-verify-sig.c @@ -8,7 +8,10 @@ #include #include #include +#include +#include #include +#include "dm-core.h" #include "dm-verity.h" #include "dm-verity-verify-sig.h" @@ -182,6 +185,10 @@ int verity_verify_root_hash(const struct dm_verity *v) goto cleanup; sig_target->passed = true; + + ret = security_bdev_setsecurity(dm_table_get_md(v->ti->table)->bdev, + DM_VERITY_SIGNATURE_SEC_NAME, + v->sig->sig, v->sig->sig_size); cleanup: kfree(root_hash); return ret; diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h index af48d9da3916..61c26443783c 100644 --- a/include/linux/device-mapper.h +++ b/include/linux/device-mapper.h @@ -627,4 +627,6 @@ static inline unsigned long to_bytes(sector_t n) return (n << SECTOR_SHIFT); } +#define DM_VERITY_SIGNATURE_SEC_NAME DM_NAME ".verity-sig" + #endif /* _LINUX_DEVICE_MAPPER_H */