From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-eopbgr140057.outbound.protection.outlook.com ([40.107.14.57]:4231 "EHLO EUR01-VE1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726891AbgHGQWE (ORCPT ); Fri, 7 Aug 2020 12:22:04 -0400 From: Andrei Botila Subject: [PATCH 07/22] crypto: s390/paes - add check for xts input length equal to zero Date: Fri, 7 Aug 2020 19:19:55 +0300 Message-Id: <20200807162010.18979-8-andrei.botila@oss.nxp.com> In-Reply-To: <20200807162010.18979-1-andrei.botila@oss.nxp.com> References: <20200807162010.18979-1-andrei.botila@oss.nxp.com> Content-Type: text/plain MIME-Version: 1.0 Sender: linux-s390-owner@vger.kernel.org List-ID: To: Herbert Xu , "David S. Miller" Cc: linux-crypto@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, x86@kernel.org, linux-arm-kernel@axis.com, Andrei Botila , Heiko Carstens , Vasily Gorbik , Christian Borntraeger From: Andrei Botila Standardize the way input lengths equal to 0 are handled in all skcipher algorithms. All the algorithms return 0 for input lengths equal to zero. Cc: Heiko Carstens Cc: Vasily Gorbik Cc: Christian Borntraeger Signed-off-by: Andrei Botila --- arch/s390/crypto/paes_s390.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/s390/crypto/paes_s390.c b/arch/s390/crypto/paes_s390.c index f3caeb17c85b..7f0861c6f019 100644 --- a/arch/s390/crypto/paes_s390.c +++ b/arch/s390/crypto/paes_s390.c @@ -494,6 +494,9 @@ static int xts_paes_crypt(struct skcipher_request *req, unsigned long modifier) u8 init[16]; } xts_param; + if (!req->cryptlen) + return 0; + ret = skcipher_walk_virt(&walk, req, false); if (ret) return ret; -- 2.17.1