From patchwork Mon Jul 16 07:35:24 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 10526075 X-Patchwork-Delegate: herbert@gondor.apana.org.au Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id B2F4E603ED for ; Mon, 16 Jul 2018 07:55:24 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B264628977 for ; Mon, 16 Jul 2018 07:55:24 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id A67A428A37; Mon, 16 Jul 2018 07:55:24 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00, MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4EA9728977 for ; Mon, 16 Jul 2018 07:55:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387972AbeGPIFd (ORCPT ); Mon, 16 Jul 2018 04:05:33 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:47144 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726898AbeGPIFb (ORCPT ); Mon, 16 Jul 2018 04:05:31 -0400 Received: from localhost (LFbn-1-12247-202.w90-92.abo.wanadoo.fr [90.92.61.202]) by mail.linuxfoundation.org (Postfix) with ESMTPSA id C6850CA1; Mon, 16 Jul 2018 07:39:28 +0000 (UTC) From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dmitry Vyukov , syzbot+37035ccfa9a0a017ffcf@syzkaller.appspotmail.com, syzbot+e073e4740cfbb3ae200b@syzkaller.appspotmail.com, linux-crypto@vger.kernel.org, "David S. Miller" , Herbert Xu , Ard Biesheuvel Subject: [PATCH 4.17 55/67] crypto: dont optimize keccakf() Date: Mon, 16 Jul 2018 09:35:24 +0200 Message-Id: <20180716073452.383199246@linuxfoundation.org> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20180716073443.294323458@linuxfoundation.org> References: <20180716073443.294323458@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review MIME-Version: 1.0 Sender: linux-crypto-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP 4.17-stable review patch. If anyone has any objections, please let me know. ------------------ From: Dmitry Vyukov commit f044a84e040b85cd609851ac88ae8b54b2cc0b75 upstream. keccakf() is the only function in kernel that uses __optimize() macro. __optimize() breaks frame pointer unwinder as optimized code uses RBP, and amusingly this always lead to degraded performance as gcc does not inline across different optimizations levels, so keccakf() wasn't inlined into its callers and keccakf_round() wasn't inlined into keccakf(). Drop __optimize() to resolve both problems. Signed-off-by: Dmitry Vyukov Fixes: 83dee2ce1ae7 ("crypto: sha3-generic - rewrite KECCAK transform to help the compiler optimize") Reported-by: syzbot+37035ccfa9a0a017ffcf@syzkaller.appspotmail.com Reported-by: syzbot+e073e4740cfbb3ae200b@syzkaller.appspotmail.com Cc: linux-crypto@vger.kernel.org Cc: "David S. Miller" Cc: Herbert Xu Cc: Ard Biesheuvel Acked-by: Ard Biesheuvel Signed-off-by: Herbert Xu Signed-off-by: Greg Kroah-Hartman --- crypto/sha3_generic.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/crypto/sha3_generic.c +++ b/crypto/sha3_generic.c @@ -152,7 +152,7 @@ static SHA3_INLINE void keccakf_round(u6 st[24] ^= bc[ 4]; } -static void __optimize("O3") keccakf(u64 st[25]) +static void keccakf(u64 st[25]) { int round;