From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9E258C169C4 for ; Tue, 29 Jan 2019 11:39:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6BF2E20989 for ; Tue, 29 Jan 2019 11:39:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1548761999; bh=Z3hQqTtparHyhp9absFEe3Apg70ckf0EBP/huUthnkQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=ZagyY1U7fiS3T6ZSFNqSLs/4v7+rhv4isehCuWCrToxc6//HyvUWKBa+3+kEckMR9 VlNrIEXu7oZ3akfMVnpCUN4CghRcUpR+s0zXa6fizGCecG8zMOOtmBp3/+O74RtVsM ezPQmVkYPzZugO2FWZ2S+8Dj2hNk+vku0foS29/U= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729539AbfA2Lj6 (ORCPT ); Tue, 29 Jan 2019 06:39:58 -0500 Received: from mail.kernel.org ([198.145.29.99]:56792 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729523AbfA2Ljz (ORCPT ); Tue, 29 Jan 2019 06:39:55 -0500 Received: from localhost (5356596B.cm-6-7b.dynamic.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id D908020989; Tue, 29 Jan 2019 11:39:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1548761994; bh=Z3hQqTtparHyhp9absFEe3Apg70ckf0EBP/huUthnkQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=m5EakNVRnxwOS0B5s3cFME3SHxXEGax3VhvhYXp6RXO5T/zzGOl8DXD9ohuV6wlHu b0YV45yu5WshefucpRhBPpKJsz7Nn5jENRCnQZ7a3K+TZyivQeSthH6K2IyEsWcfS1 oNwNUEupQGmNDtifTn1NlTKb8WV2uRZhGczxPQPE= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Milan Broz , Mike Snitzer Subject: [PATCH 4.20 073/117] dm crypt: fix parsing of extended IV arguments Date: Tue, 29 Jan 2019 12:35:24 +0100 Message-Id: <20190129113211.165761168@linuxfoundation.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190129113207.477505932@linuxfoundation.org> References: <20190129113207.477505932@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.20-stable review patch. If anyone has any objections, please let me know. ------------------ From: Milan Broz commit 1856b9f7bcc8e9bdcccc360aabb56fbd4dd6c565 upstream. The dm-crypt cipher specification in a mapping table is defined as: cipher[:keycount]-chainmode-ivmode[:ivopts] or (new crypt API format): capi:cipher_api_spec-ivmode[:ivopts] For ESSIV, the parameter includes hash specification, for example: aes-cbc-essiv:sha256 The implementation expected that additional IV option to never include another dash '-' character. But, with SHA3, there are names like sha3-256; so the mapping table parser fails: dmsetup create test --table "0 8 crypt aes-cbc-essiv:sha3-256 9c1185a5c5e9fc54612808977ee8f5b9e 0 /dev/sdb 0" or (new crypt API format) dmsetup create test --table "0 8 crypt capi:cbc(aes)-essiv:sha3-256 9c1185a5c5e9fc54612808977ee8f5b9e 0 /dev/sdb 0" device-mapper: crypt: Ignoring unexpected additional cipher options device-mapper: table: 253:0: crypt: Error creating IV device-mapper: ioctl: error adding target to table Fix the dm-crypt constructor to ignore additional dash in IV options and also remove a bogus warning (that is ignored anyway). Cc: stable@vger.kernel.org # 4.12+ Signed-off-by: Milan Broz Signed-off-by: Mike Snitzer Signed-off-by: Greg Kroah-Hartman --- drivers/md/dm-crypt.c | 25 +++++++++++++++++-------- 1 file changed, 17 insertions(+), 8 deletions(-) --- a/drivers/md/dm-crypt.c +++ b/drivers/md/dm-crypt.c @@ -2405,9 +2405,21 @@ static int crypt_ctr_cipher_new(struct d * capi:cipher_api_spec-iv:ivopts */ tmp = &cipher_in[strlen("capi:")]; - cipher_api = strsep(&tmp, "-"); - *ivmode = strsep(&tmp, ":"); - *ivopts = tmp; + + /* Separate IV options if present, it can contain another '-' in hash name */ + *ivopts = strrchr(tmp, ':'); + if (*ivopts) { + **ivopts = '\0'; + (*ivopts)++; + } + /* Parse IV mode */ + *ivmode = strrchr(tmp, '-'); + if (*ivmode) { + **ivmode = '\0'; + (*ivmode)++; + } + /* The rest is crypto API spec */ + cipher_api = tmp; if (*ivmode && !strcmp(*ivmode, "lmk")) cc->tfms_count = 64; @@ -2477,11 +2489,8 @@ static int crypt_ctr_cipher_old(struct d goto bad_mem; chainmode = strsep(&tmp, "-"); - *ivopts = strsep(&tmp, "-"); - *ivmode = strsep(&*ivopts, ":"); - - if (tmp) - DMWARN("Ignoring unexpected additional cipher options"); + *ivmode = strsep(&tmp, ":"); + *ivopts = tmp; /* * For compatibility with the original dm-crypt mapping format, if