From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:60322 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752507AbcEAW5p (ORCPT ); Sun, 1 May 2016 18:57:45 -0400 Subject: Patch "crypto: ccp - Prevent information leakage on export" has been added to the 4.4-stable tree To: thomas.lendacky@amd.com, ben@decadent.org.uk, gregkh@linuxfoundation.org, herbert@gondor.apana.org.au Cc: , From: Date: Sun, 01 May 2016 15:57:42 -0700 Message-ID: <146214346251180@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled crypto: ccp - Prevent information leakage on export to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: crypto-ccp-prevent-information-leakage-on-export.patch and it can be found in the queue-4.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From f709b45ec461b548c41a00044dba1f1b572783bf Mon Sep 17 00:00:00 2001 From: Tom Lendacky Date: Wed, 13 Apr 2016 10:52:25 -0500 Subject: crypto: ccp - Prevent information leakage on export From: Tom Lendacky commit f709b45ec461b548c41a00044dba1f1b572783bf upstream. Prevent information from leaking to userspace by doing a memset to 0 of the export state structure before setting the structure values and copying it. This prevents un-initialized padding areas from being copied into the export area. Reported-by: Ben Hutchings Signed-off-by: Tom Lendacky Signed-off-by: Herbert Xu Signed-off-by: Greg Kroah-Hartman --- drivers/crypto/ccp/ccp-crypto-aes-cmac.c | 3 +++ drivers/crypto/ccp/ccp-crypto-sha.c | 3 +++ 2 files changed, 6 insertions(+) --- a/drivers/crypto/ccp/ccp-crypto-aes-cmac.c +++ b/drivers/crypto/ccp/ccp-crypto-aes-cmac.c @@ -225,6 +225,9 @@ static int ccp_aes_cmac_export(struct ah struct ccp_aes_cmac_req_ctx *rctx = ahash_request_ctx(req); struct ccp_aes_cmac_exp_ctx state; + /* Don't let anything leak to 'out' */ + memset(&state, 0, sizeof(state)); + state.null_msg = rctx->null_msg; memcpy(state.iv, rctx->iv, sizeof(state.iv)); state.buf_count = rctx->buf_count; --- a/drivers/crypto/ccp/ccp-crypto-sha.c +++ b/drivers/crypto/ccp/ccp-crypto-sha.c @@ -212,6 +212,9 @@ static int ccp_sha_export(struct ahash_r struct ccp_sha_req_ctx *rctx = ahash_request_ctx(req); struct ccp_sha_exp_ctx state; + /* Don't let anything leak to 'out' */ + memset(&state, 0, sizeof(state)); + state.type = rctx->type; state.msg_bits = rctx->msg_bits; state.first = rctx->first; Patches currently in stable-queue which might be from thomas.lendacky@amd.com are queue-4.4/crypto-ccp-prevent-information-leakage-on-export.patch