From patchwork Fri Nov 25 04:36:39 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Herbert Xu X-Patchwork-Id: 13055523 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 7C0B4C433FE for ; Fri, 25 Nov 2022 04:39:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:List-Subscribe:List-Help: List-Post:List-Archive:List-Unsubscribe:List-Id:Message-Id:To:References: Subject:Date:From:Reply-To:Cc:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To: List-Owner; bh=S+Imvuy9kDwQHZiK5zRo79pitJyPtXqLHzEYuWcOBgs=; b=jBK/ClVvjzCxTg fLpBYh47d6jAvv8+0bWx+x3K8HakRpiCk3troK+6jYSDoTGnpfrGRaFDhBUOQKczTZpRxO1xkur1Q ZyBIJjm+ueD87XhADcYopVMZ4I4L63nwxSd9wjKmVaC1DD1riQ9UJDHZAHa5PwYaxVN4AnfrtZ3b9 0gmFnghu80ECD78kpaTX1TAsY0/IQqdB5UIO29vvicpWFT7JkvzCyxw83A0zEcQBGoow/sjv2WaTy KS5RPOKP1aFwtG3XsjUB56cJ/r1q+Mha5MjM9rpvMygwwbltPw3fX8G66rhmxeV/X44PrxNJ2s3TA M+XhXWVR+fXojvakTcow==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oyQU3-00CoWS-2D; Fri, 25 Nov 2022 04:38:39 +0000 Received: from helcar.hmeau.com ([216.24.177.18] helo=formenos.hmeau.com) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oyQSG-00CnjW-Lt for linux-arm-kernel@lists.infradead.org; Fri, 25 Nov 2022 04:36:52 +0000 Received: from loth.rohan.me.apana.org.au ([192.168.167.2]) by formenos.hmeau.com with smtp (Exim 4.94.2 #2 (Debian)) id 1oyQS7-000dkB-Ec; Fri, 25 Nov 2022 12:36:40 +0800 Received: by loth.rohan.me.apana.org.au (sSMTP sendmail emulation); Fri, 25 Nov 2022 12:36:39 +0800 From: "Herbert Xu" Date: Fri, 25 Nov 2022 12:36:39 +0800 Subject: [v2 PATCH 6/9] crypto: api - Increase MAX_ALGAPI_ALIGNMASK to 127 References: To: Ard Biesheuvel , Will Deacon , Marc Zyngier , Arnd Bergmann , Greg Kroah-Hartman , Andrew Morton , Linus Torvalds , Linux Memory Management List , Linux ARM , Linux Kernel Mailing List , "David S. Miller" , Linux Crypto Mailing List Message-Id: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20221124_203648_757678_C4CAF9EA X-CRM114-Status: GOOD ( 12.88 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Previously we limited the maximum alignment mask to 63. This is mostly due to stack usage for shash. This patch introduces a separate limit for shash algorithms and increases the general limit to 127 which is the value that we need for DMA allocations on arm64. Signed-off-by: Herbert Xu --- crypto/shash.c | 9 +++++++-- include/crypto/algapi.h | 2 +- 2 files changed, 8 insertions(+), 3 deletions(-) diff --git a/crypto/shash.c b/crypto/shash.c index 4c88e63b3350..22c744389586 100644 --- a/crypto/shash.c +++ b/crypto/shash.c @@ -18,6 +18,8 @@ #include "internal.h" +#define MAX_SHASH_ALIGNMASK 63 + static const struct crypto_type crypto_shash_type; static int shash_no_setkey(struct crypto_shash *tfm, const u8 *key, @@ -100,7 +102,7 @@ static int shash_update_unaligned(struct shash_desc *desc, const u8 *data, * We cannot count on __aligned() working for large values: * https://patchwork.kernel.org/patch/9507697/ */ - u8 ubuf[MAX_ALGAPI_ALIGNMASK * 2]; + u8 ubuf[MAX_SHASH_ALIGNMASK * 2]; u8 *buf = PTR_ALIGN(&ubuf[0], alignmask + 1); int err; @@ -142,7 +144,7 @@ static int shash_final_unaligned(struct shash_desc *desc, u8 *out) * We cannot count on __aligned() working for large values: * https://patchwork.kernel.org/patch/9507697/ */ - u8 ubuf[MAX_ALGAPI_ALIGNMASK + HASH_MAX_DIGESTSIZE]; + u8 ubuf[MAX_SHASH_ALIGNMASK + HASH_MAX_DIGESTSIZE]; u8 *buf = PTR_ALIGN(&ubuf[0], alignmask + 1); int err; @@ -536,6 +538,9 @@ static int shash_prepare_alg(struct shash_alg *alg) alg->statesize > HASH_MAX_STATESIZE) return -EINVAL; + if (base->cra_alignmask > MAX_SHASH_ALIGNMASK) + return -EINVAL; + if ((alg->export && !alg->import) || (alg->import && !alg->export)) return -EINVAL; diff --git a/include/crypto/algapi.h b/include/crypto/algapi.h index 4c99eb66e654..8722fd67f40a 100644 --- a/include/crypto/algapi.h +++ b/include/crypto/algapi.h @@ -22,7 +22,7 @@ * algs and architectures. Ciphers have a lower maximum size. */ #define MAX_ALGAPI_BLOCKSIZE 160 -#define MAX_ALGAPI_ALIGNMASK 63 +#define MAX_ALGAPI_ALIGNMASK 127 #define MAX_CIPHER_BLOCKSIZE 16 #define MAX_CIPHER_ALIGNMASK 15