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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,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 962E6C3A5A9 for ; Sat, 2 May 2020 18:28:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 76034206F1 for ; Sat, 2 May 2020 18:28:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1588444114; bh=DIRRWMKKG6PuEZe/jxmnBQSb7EtQNzSmtDxFdL5Rd74=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=iiwGSg/oTfCzDtGgCSk0etw6IzOM223m+xba4dlDJ2MmB5XlJS3w3C4LS/i1oQ0tZ JbYE5su25KIxvZe2bLpAjz/PownZZrt+zPDDZTsnVkdZIpR5CK9xMzvueGt0f+HbH6 6lTV3MBRw2c/VA/g+m9Vkb9AnY6z/b/QxsDxIkUQ= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728534AbgEBS2d (ORCPT ); Sat, 2 May 2020 14:28:33 -0400 Received: from mail.kernel.org ([198.145.29.99]:54626 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728418AbgEBS2I (ORCPT ); Sat, 2 May 2020 14:28:08 -0400 Received: from sol.hsd1.ca.comcast.net (c-107-3-166-239.hsd1.ca.comcast.net [107.3.166.239]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 010742075B; Sat, 2 May 2020 18:28:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1588444088; bh=DIRRWMKKG6PuEZe/jxmnBQSb7EtQNzSmtDxFdL5Rd74=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=PWqPGct5HDq0OUWPrgUsx7rK3tDbG+8sNdu4jJJYWt/+/yQ17tK0BnhXBcie2PqXc /px/lgw4jBC+9RANyujawdCzcMFCPhOtJ4Mpyc2v0BWrapwq5Dh/7u3Sbtzr22AUEA iEOcpPSkn9LnwYA0kldJJj4wxarmeqTpFW1Tmd7U= From: Eric Biggers To: linux-crypto@vger.kernel.org Cc: linux-kernel@vger.kernel.org, "Jason A . Donenfeld" , Theodore Ts'o , linuxppc-dev@lists.ozlabs.org, Benjamin Herrenschmidt , Michael Ellerman , Paul Mackerras Subject: [PATCH 2/7] crypto: powerpc/sha1 - remove unused temporary workspace Date: Sat, 2 May 2020 11:24:22 -0700 Message-Id: <20200502182427.104383-3-ebiggers@kernel.org> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200502182427.104383-1-ebiggers@kernel.org> References: <20200502182427.104383-1-ebiggers@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Eric Biggers The PowerPC implementation of SHA-1 doesn't actually use the 16-word temporary array that's passed to the assembly code. This was probably meant to correspond to the 'W' array that lib/sha1.c uses. However, in sha1-powerpc-asm.S these values are actually stored in GPRs 16-31. Referencing SHA_WORKSPACE_WORDS from this code also isn't appropriate, since it's an implementation detail of lib/sha1.c. Therefore, just remove this unneeded array. Tested with: export ARCH=powerpc CROSS_COMPILE=powerpc-linux-gnu- make mpc85xx_defconfig cat >> .config << EOF # CONFIG_MODULES is not set # CONFIG_CRYPTO_MANAGER_DISABLE_TESTS is not set CONFIG_DEBUG_KERNEL=y CONFIG_CRYPTO_MANAGER_EXTRA_TESTS=y CONFIG_CRYPTO_SHA1_PPC=y EOF make olddefconfig make -j32 qemu-system-ppc -M mpc8544ds -cpu e500 -nographic \ -kernel arch/powerpc/boot/zImage \ -append "cryptomgr.fuzz_iterations=1000 cryptomgr.panic_on_fail=1" Cc: linuxppc-dev@lists.ozlabs.org Cc: Benjamin Herrenschmidt Cc: Michael Ellerman Cc: Paul Mackerras Signed-off-by: Eric Biggers --- arch/powerpc/crypto/sha1.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/arch/powerpc/crypto/sha1.c b/arch/powerpc/crypto/sha1.c index 7b43fc352089b1..db46b6130a9642 100644 --- a/arch/powerpc/crypto/sha1.c +++ b/arch/powerpc/crypto/sha1.c @@ -16,12 +16,11 @@ #include #include #include -#include #include #include #include -extern void powerpc_sha_transform(u32 *state, const u8 *src, u32 *temp); +void powerpc_sha_transform(u32 *state, const u8 *src); static int sha1_init(struct shash_desc *desc) { @@ -47,7 +46,6 @@ static int sha1_update(struct shash_desc *desc, const u8 *data, src = data; if ((partial + len) > 63) { - u32 temp[SHA_WORKSPACE_WORDS]; if (partial) { done = -partial; @@ -56,12 +54,11 @@ static int sha1_update(struct shash_desc *desc, const u8 *data, } do { - powerpc_sha_transform(sctx->state, src, temp); + powerpc_sha_transform(sctx->state, src); done += 64; src = data + done; } while (done + 63 < len); - memzero_explicit(temp, sizeof(temp)); partial = 0; } memcpy(sctx->buffer + partial, src, len - done); -- 2.26.2