From patchwork Mon Sep 15 07:30:30 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Behan Webster X-Patchwork-Id: 4903441 Return-Path: X-Original-To: patchwork-linux-btrfs@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 05753BEEA5 for ; Mon, 15 Sep 2014 07:32:10 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id AB8C0201BA for ; Mon, 15 Sep 2014 07:32:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4DFC12015E for ; Mon, 15 Sep 2014 07:32:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753474AbaIOHbw (ORCPT ); Mon, 15 Sep 2014 03:31:52 -0400 Received: from mail-pd0-f173.google.com ([209.85.192.173]:33725 "EHLO mail-pd0-f173.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753415AbaIOHbr (ORCPT ); Mon, 15 Sep 2014 03:31:47 -0400 Received: by mail-pd0-f173.google.com with SMTP id ft15so5704016pdb.4 for ; Mon, 15 Sep 2014 00:31:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=converseincode.com; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-type:content-transfer-encoding; bh=x9XBlagF9l7yFDukBBVA+HMtHEhnPRwRWujBHuvUDuI=; b=MkNsPRe7cidhIU0K+KFCW+094ClM1zNzMuWo5J/ymgKnsqyv9A2TmOVmpKdG2RhAhy zfT6nbtmW/U0gLcmZJwdOlO3BJIyJrU2PIxMKrMxUav0pniAMz37KRWLgCH6opWN+mqJ FDcLWM7qSwi+/qqy6aJPtPlILHteHG2LCgJ70= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-type:content-transfer-encoding; bh=x9XBlagF9l7yFDukBBVA+HMtHEhnPRwRWujBHuvUDuI=; b=mjfIJwY2W6VKtlMl7eYGVbfiBdfZ9RZuCRYVVYBBYekMGYkJGTlAUv0Z3wUq5KS58A 49IazlaQ9aLoEPeuABTRYsyYEyvs7HXhzNFo61Dbb/0bvVXjXzWVd3GYE329VnsVJqYY Rq2wGWLLY44nUoCCiStcqPiDEyp3W/pKDvcw7TE+QMUIPmn1Je0lKTe44HkqRcFKJ6BV EZyC0huUS11frW3QUJK4d78HR8Zp4fNXiooXLWMQh8a0R7SxG/xzUqoMLjvpwhtEWJH2 ZKhRu/2vhRJOMp5jdRSTQID/q+hjo6b8dnP59AAbc8L+NDxzYYmAk3hI6ZFqrb+Ix1kO skLw== X-Gm-Message-State: ALoCoQn7C7iIBKeT5uiG5QC0egJDMW/m9DuPBUtYoqEI9u3HQdcxQW15zW2ZveLN/0rGvIFNUcoG X-Received: by 10.68.164.164 with SMTP id yr4mr36259709pbb.57.1410766307279; Mon, 15 Sep 2014 00:31:47 -0700 (PDT) Received: from galdor.edimax.com ([38.126.120.10]) by mx.google.com with ESMTPSA id cz1sm1011611pdb.85.2014.09.15.00.31.41 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 15 Sep 2014 00:31:45 -0700 (PDT) From: behanw@converseincode.com To: agk@redhat.com, clm@fb.com, davem@davemloft.net, dm-devel@redhat.com, fabf@skynet.be, herbert@gondor.apana.org.au, jbacik@fb.com, snitzer@redhat.com, tadeusz.struk@intel.com Cc: akpm@linux-foundation.org, bruce.w.allan@intel.com, d.kasatkin@samsung.com, james.l.morris@oracle.com, john.griffin@intel.com, linux-btrfs@vger.kernel.org, linux-crypto@vger.kernel.org, linux-ima-devel@lists.sourceforge.net, linux-ima-user@lists.sourceforge.net, linux-kernel@vger.kernel.org, linux-raid@vger.kernel.org, linux-security-module@vger.kernel.org, neilb@suse.de, qat-linux@intel.com, serge@hallyn.com, thomas.lendacky@amd.com, zohar@linux.vnet.ibm.com, torvalds@linux-foundation.org, =?UTF-8?q?Jan-Simon=20M=C3=B6ller?= , Behan Webster , pageexec@freemail.hu, gmazyland@gmail.com Subject: [PATCH v3 08/12] crypto, dm: LLVMLinux: Remove VLAIS usage from dm-crypt Date: Mon, 15 Sep 2014 00:30:30 -0700 Message-Id: <1410766234-1634-9-git-send-email-behanw@converseincode.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1410766234-1634-1-git-send-email-behanw@converseincode.com> References: <1410766234-1634-1-git-send-email-behanw@converseincode.com> MIME-Version: 1.0 Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org X-Spam-Status: No, score=-7.4 required=5.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,RP_MATCHES_RCVD,T_DKIM_INVALID,UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Jan-Simon Möller Replaced the use of a Variable Length Array In Struct (VLAIS) with a C99 compliant equivalent. This patch allocates the appropriate amount of memory using a char array using the SHASH_DESC_ON_STACK macro. The new code can be compiled with both gcc and clang. Signed-off-by: Jan-Simon Möller Signed-off-by: Behan Webster Cc: pageexec@freemail.hu Cc: gmazyland@gmail.com Cc: "David S. Miller" Cc: Herbert Xu --- drivers/md/dm-crypt.c | 34 ++++++++++++++-------------------- 1 file changed, 14 insertions(+), 20 deletions(-) diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c index cd15e08..fc93b93 100644 --- a/drivers/md/dm-crypt.c +++ b/drivers/md/dm-crypt.c @@ -526,29 +526,26 @@ static int crypt_iv_lmk_one(struct crypt_config *cc, u8 *iv, u8 *data) { struct iv_lmk_private *lmk = &cc->iv_gen_private.lmk; - struct { - struct shash_desc desc; - char ctx[crypto_shash_descsize(lmk->hash_tfm)]; - } sdesc; + SHASH_DESC_ON_STACK(desc, lmk->hash_tfm); struct md5_state md5state; __le32 buf[4]; int i, r; - sdesc.desc.tfm = lmk->hash_tfm; - sdesc.desc.flags = CRYPTO_TFM_REQ_MAY_SLEEP; + desc->tfm = lmk->hash_tfm; + desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP; - r = crypto_shash_init(&sdesc.desc); + r = crypto_shash_init(desc); if (r) return r; if (lmk->seed) { - r = crypto_shash_update(&sdesc.desc, lmk->seed, LMK_SEED_SIZE); + r = crypto_shash_update(desc, lmk->seed, LMK_SEED_SIZE); if (r) return r; } /* Sector is always 512B, block size 16, add data of blocks 1-31 */ - r = crypto_shash_update(&sdesc.desc, data + 16, 16 * 31); + r = crypto_shash_update(desc, data + 16, 16 * 31); if (r) return r; @@ -557,12 +554,12 @@ static int crypt_iv_lmk_one(struct crypt_config *cc, u8 *iv, buf[1] = cpu_to_le32((((u64)dmreq->iv_sector >> 32) & 0x00FFFFFF) | 0x80000000); buf[2] = cpu_to_le32(4024); buf[3] = 0; - r = crypto_shash_update(&sdesc.desc, (u8 *)buf, sizeof(buf)); + r = crypto_shash_update(desc, (u8 *)buf, sizeof(buf)); if (r) return r; /* No MD5 padding here */ - r = crypto_shash_export(&sdesc.desc, &md5state); + r = crypto_shash_export(desc, &md5state); if (r) return r; @@ -679,10 +676,7 @@ static int crypt_iv_tcw_whitening(struct crypt_config *cc, struct iv_tcw_private *tcw = &cc->iv_gen_private.tcw; u64 sector = cpu_to_le64((u64)dmreq->iv_sector); u8 buf[TCW_WHITENING_SIZE]; - struct { - struct shash_desc desc; - char ctx[crypto_shash_descsize(tcw->crc32_tfm)]; - } sdesc; + SHASH_DESC_ON_STACK(desc, tcw->crc32_tfm); int i, r; /* xor whitening with sector number */ @@ -691,16 +685,16 @@ static int crypt_iv_tcw_whitening(struct crypt_config *cc, crypto_xor(&buf[8], (u8 *)§or, 8); /* calculate crc32 for every 32bit part and xor it */ - sdesc.desc.tfm = tcw->crc32_tfm; - sdesc.desc.flags = CRYPTO_TFM_REQ_MAY_SLEEP; + desc->tfm = tcw->crc32_tfm; + desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP; for (i = 0; i < 4; i++) { - r = crypto_shash_init(&sdesc.desc); + r = crypto_shash_init(desc); if (r) goto out; - r = crypto_shash_update(&sdesc.desc, &buf[i * 4], 4); + r = crypto_shash_update(desc, &buf[i * 4], 4); if (r) goto out; - r = crypto_shash_final(&sdesc.desc, &buf[i * 4]); + r = crypto_shash_final(desc, &buf[i * 4]); if (r) goto out; }