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=-9.5 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED,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 4B68BC433F4 for ; Wed, 19 Sep 2018 02:19:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E9C70214DA for ; Wed, 19 Sep 2018 02:19:27 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="aLmB2yvk" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E9C70214DA Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=chromium.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730919AbeISHyy (ORCPT ); Wed, 19 Sep 2018 03:54:54 -0400 Received: from mail-pg1-f193.google.com ([209.85.215.193]:40189 "EHLO mail-pg1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730875AbeISHyx (ORCPT ); Wed, 19 Sep 2018 03:54:53 -0400 Received: by mail-pg1-f193.google.com with SMTP id l63-v6so1947491pga.7 for ; Tue, 18 Sep 2018 19:19:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=QAt4ak+cBBxaqpmD5vgsGq4R8X7Wa4bk4mC/M1a5dlE=; b=aLmB2yvkueyDDVRiK6KrCfRwxCSZn6MZHZfgN7XWNhgLDZs6Yihaq83wkD4417vvke ZjpT/64YvjR1NcXpQy1ohRyjTlRMTSEJX1QzcbnT4xypOim1mBL+q8JUP+5kiPXEIkDZ Onm7kCVNN5Vxv6pG0VSo/TKCjbbOfgBkvKTn0= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=QAt4ak+cBBxaqpmD5vgsGq4R8X7Wa4bk4mC/M1a5dlE=; b=W+8ns/gMmKG7nCVeaV9BYINqBq72zMrcxBgR26KPqvIt0TbCvuuqUAL6Lt2yig0V1n rCCN6S3rzVmKaTj53ngUw9dYX4jUQMfLTNe8+AHgO6Wbhgf6NXUe51EJDl4Y7f9HoTIg kXRplNULQcoj497My+fk36tatUZWC9FKe1eo4BFPcslzpnenUOEzDAMqW25Qt0u0jCGW Ius1HScT3NEs4TehddsigY3porXjQSmo/VRmnxwxnwe9GR2l0aDGLTRxAXzmde7FQcJ/ kp4uFhiVlJJrZH309OrVVTIPvfPV1jNpG2HcZeGZd3eUa8ltPIKt6MSMwNGPpo0WL7O1 a7Ag== X-Gm-Message-State: APzg51DiMN0ETZSoni01J/Sx7UM4c/DyMbXG3ZwtsOcjc/nEX7ZjdK2P /PjTxD9M+SX00d6pJkiUkz7JVw== X-Google-Smtp-Source: ANB0VdZ/FOhgLUsEd+wQf4Znf0HRRfMY4dBsT4O8c1P1NCadFdpt6NukVApk3vKmHfziNLEP6q/2VA== X-Received: by 2002:a63:2bc9:: with SMTP id r192-v6mr30567287pgr.386.1537323563225; Tue, 18 Sep 2018 19:19:23 -0700 (PDT) Received: from www.outflux.net (173-164-112-133-Oregon.hfc.comcastbusiness.net. [173.164.112.133]) by smtp.gmail.com with ESMTPSA id d81-v6sm31074217pfj.122.2018.09.18.19.19.18 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Tue, 18 Sep 2018 19:19:18 -0700 (PDT) From: Kees Cook To: Herbert Xu Cc: Kees Cook , Harsh Jain , Ard Biesheuvel , Eric Biggers , linux-crypto , Linux Kernel Mailing List Subject: [PATCH crypto-next 19/23] crypto: chelsio - Remove VLA usage of skcipher Date: Tue, 18 Sep 2018 19:10:56 -0700 Message-Id: <20180919021100.3380-20-keescook@chromium.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20180919021100.3380-1-keescook@chromium.org> References: <20180919021100.3380-1-keescook@chromium.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org In the quest to remove all stack VLA usage from the kernel[1], this replaces struct crypto_skcipher and SKCIPHER_REQUEST_ON_STACK() usage with struct crypto_sync_skcipher and SYNC_SKCIPHER_REQUEST_ON_STACK(), which uses a fixed stack size. [1] https://lkml.kernel.org/r/CA+55aFzCG-zNmZwX4A2FQpadafLfEzK6CC=qPXydAacU1RqZWA@mail.gmail.com Cc: Harsh Jain Signed-off-by: Kees Cook --- drivers/crypto/chelsio/chcr_algo.c | 27 ++++++++++++++------------- drivers/crypto/chelsio/chcr_crypto.h | 2 +- 2 files changed, 15 insertions(+), 14 deletions(-) diff --git a/drivers/crypto/chelsio/chcr_algo.c b/drivers/crypto/chelsio/chcr_algo.c index 5c539af8ed60..dfc3a10bb55b 100644 --- a/drivers/crypto/chelsio/chcr_algo.c +++ b/drivers/crypto/chelsio/chcr_algo.c @@ -671,7 +671,7 @@ static int chcr_sg_ent_in_wr(struct scatterlist *src, return min(srclen, dstlen); } -static int chcr_cipher_fallback(struct crypto_skcipher *cipher, +static int chcr_cipher_fallback(struct crypto_sync_skcipher *cipher, u32 flags, struct scatterlist *src, struct scatterlist *dst, @@ -681,9 +681,9 @@ static int chcr_cipher_fallback(struct crypto_skcipher *cipher, { int err; - SKCIPHER_REQUEST_ON_STACK(subreq, cipher); + SYNC_SKCIPHER_REQUEST_ON_STACK(subreq, cipher); - skcipher_request_set_tfm(subreq, cipher); + skcipher_request_set_sync_tfm(subreq, cipher); skcipher_request_set_callback(subreq, flags, NULL, NULL); skcipher_request_set_crypt(subreq, src, dst, nbytes, iv); @@ -854,13 +854,14 @@ static int chcr_cipher_fallback_setkey(struct crypto_ablkcipher *cipher, struct ablk_ctx *ablkctx = ABLK_CTX(c_ctx(cipher)); int err = 0; - crypto_skcipher_clear_flags(ablkctx->sw_cipher, CRYPTO_TFM_REQ_MASK); - crypto_skcipher_set_flags(ablkctx->sw_cipher, cipher->base.crt_flags & - CRYPTO_TFM_REQ_MASK); - err = crypto_skcipher_setkey(ablkctx->sw_cipher, key, keylen); + crypto_sync_skcipher_clear_flags(ablkctx->sw_cipher, + CRYPTO_TFM_REQ_MASK); + crypto_sync_skcipher_set_flags(ablkctx->sw_cipher, + cipher->base.crt_flags & CRYPTO_TFM_REQ_MASK); + err = crypto_sync_skcipher_setkey(ablkctx->sw_cipher, key, keylen); tfm->crt_flags &= ~CRYPTO_TFM_RES_MASK; tfm->crt_flags |= - crypto_skcipher_get_flags(ablkctx->sw_cipher) & + crypto_sync_skcipher_get_flags(ablkctx->sw_cipher) & CRYPTO_TFM_RES_MASK; return err; } @@ -1360,8 +1361,8 @@ static int chcr_cra_init(struct crypto_tfm *tfm) struct chcr_context *ctx = crypto_tfm_ctx(tfm); struct ablk_ctx *ablkctx = ABLK_CTX(ctx); - ablkctx->sw_cipher = crypto_alloc_skcipher(alg->cra_name, 0, - CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK); + ablkctx->sw_cipher = crypto_alloc_sync_skcipher(alg->cra_name, 0, + CRYPTO_ALG_NEED_FALLBACK); if (IS_ERR(ablkctx->sw_cipher)) { pr_err("failed to allocate fallback for %s\n", alg->cra_name); return PTR_ERR(ablkctx->sw_cipher); @@ -1390,8 +1391,8 @@ static int chcr_rfc3686_init(struct crypto_tfm *tfm) /*RFC3686 initialises IV counter value to 1, rfc3686(ctr(aes)) * cannot be used as fallback in chcr_handle_cipher_response */ - ablkctx->sw_cipher = crypto_alloc_skcipher("ctr(aes)", 0, - CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK); + ablkctx->sw_cipher = crypto_alloc_sync_skcipher("ctr(aes)", 0, + CRYPTO_ALG_NEED_FALLBACK); if (IS_ERR(ablkctx->sw_cipher)) { pr_err("failed to allocate fallback for %s\n", alg->cra_name); return PTR_ERR(ablkctx->sw_cipher); @@ -1406,7 +1407,7 @@ static void chcr_cra_exit(struct crypto_tfm *tfm) struct chcr_context *ctx = crypto_tfm_ctx(tfm); struct ablk_ctx *ablkctx = ABLK_CTX(ctx); - crypto_free_skcipher(ablkctx->sw_cipher); + crypto_free_sync_skcipher(ablkctx->sw_cipher); if (ablkctx->aes_generic) crypto_free_cipher(ablkctx->aes_generic); } diff --git a/drivers/crypto/chelsio/chcr_crypto.h b/drivers/crypto/chelsio/chcr_crypto.h index 54835cb109e5..e26b72cfe4b6 100644 --- a/drivers/crypto/chelsio/chcr_crypto.h +++ b/drivers/crypto/chelsio/chcr_crypto.h @@ -170,7 +170,7 @@ static inline struct chcr_context *h_ctx(struct crypto_ahash *tfm) } struct ablk_ctx { - struct crypto_skcipher *sw_cipher; + struct crypto_sync_skcipher *sw_cipher; struct crypto_cipher *aes_generic; __be32 key_ctx_hdr; unsigned int enckey_len; -- 2.17.1