From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755364AbbDGNM0 (ORCPT ); Tue, 7 Apr 2015 09:12:26 -0400 Received: from ip4-83-240-67-251.cust.nbox.cz ([83.240.67.251]:54512 "EHLO ip4-83-240-18-248.cust.nbox.cz" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1754115AbbDGMwI (ORCPT ); Tue, 7 Apr 2015 08:52:08 -0400 From: Jiri Slaby To: stable@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Harald Freudenberger , Herbert Xu , Jiri Slaby Subject: [PATCH 3.12 087/155] crypto: s390 - fix aes,des ctr mode concurrency finding. Date: Tue, 7 Apr 2015 14:50:56 +0200 Message-Id: <10ee32bd33ff3701c7da2648aeec54b5184793b6.1428411004.git.jslaby@suse.cz> X-Mailer: git-send-email 2.3.4 In-Reply-To: <9a548862b8a26cbccc14f2c6c9c3688813d8d14b.1428411003.git.jslaby@suse.cz> References: <9a548862b8a26cbccc14f2c6c9c3688813d8d14b.1428411003.git.jslaby@suse.cz> In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Harald Freudenberger 3.12-stable review patch. If anyone has any objections, please let me know. =============== commit 3901c1124ec5099254a9396085f7798153a7293f upstream. An additional testcase found an issue with the last series of patches applied: the fallback solution may not save the iv value after operation. This very small fix just makes sure the iv is copied back to the walk/desc struct. Cc: # 3.14+ Signed-off-by: Harald Freudenberger Signed-off-by: Herbert Xu Signed-off-by: Jiri Slaby --- arch/s390/crypto/aes_s390.c | 3 +++ arch/s390/crypto/des_s390.c | 3 +++ 2 files changed, 6 insertions(+) diff --git a/arch/s390/crypto/aes_s390.c b/arch/s390/crypto/aes_s390.c index f8d9cb14adce..92eb4d6ad39d 100644 --- a/arch/s390/crypto/aes_s390.c +++ b/arch/s390/crypto/aes_s390.c @@ -818,6 +818,9 @@ static int ctr_aes_crypt(struct blkcipher_desc *desc, long func, else memcpy(walk->iv, ctrptr, AES_BLOCK_SIZE); spin_unlock(&ctrblk_lock); + } else { + if (!nbytes) + memcpy(walk->iv, ctrptr, AES_BLOCK_SIZE); } /* * final block may be < AES_BLOCK_SIZE, copy only nbytes diff --git a/arch/s390/crypto/des_s390.c b/arch/s390/crypto/des_s390.c index a3e24d4d2530..a89feffb22b5 100644 --- a/arch/s390/crypto/des_s390.c +++ b/arch/s390/crypto/des_s390.c @@ -429,6 +429,9 @@ static int ctr_desall_crypt(struct blkcipher_desc *desc, long func, else memcpy(walk->iv, ctrptr, DES_BLOCK_SIZE); spin_unlock(&ctrblk_lock); + } else { + if (!nbytes) + memcpy(walk->iv, ctrptr, DES_BLOCK_SIZE); } /* final block may be < DES_BLOCK_SIZE, copy only nbytes */ if (nbytes) { -- 2.3.4