Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750912AbcDJUDT (ORCPT ); Sun, 10 Apr 2016 16:03:19 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:53865 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932079AbcDJTIV (ORCPT ); Sun, 10 Apr 2016 15:08:21 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Tom Lendacky , Herbert Xu Subject: [PATCH 4.4 076/210] crypto: ccp - Dont assume export/import areas are aligned Date: Sun, 10 Apr 2016 11:34:57 -0700 Message-Id: <20160410183529.329093572@linuxfoundation.org> X-Mailer: git-send-email 2.8.0 In-Reply-To: <20160410183526.651820045@linuxfoundation.org> References: <20160410183526.651820045@linuxfoundation.org> User-Agent: quilt/0.64 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4321 Lines: 121 4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Tom Lendacky commit b31dde2a5cb1bf764282abf934266b7193c2bc7c upstream. Use a local variable for the exported and imported state so that alignment is not an issue. On export, set a local variable from the request context and then memcpy the contents of the local variable to the export memory area. On import, memcpy the import memory area into a local variable and then use the local variable to set the request context. Signed-off-by: Tom Lendacky Signed-off-by: Herbert Xu Signed-off-by: Greg Kroah-Hartman --- drivers/crypto/ccp/ccp-crypto-aes-cmac.c | 26 ++++++++++++++--------- drivers/crypto/ccp/ccp-crypto-sha.c | 34 ++++++++++++++++++------------- 2 files changed, 36 insertions(+), 24 deletions(-) --- a/drivers/crypto/ccp/ccp-crypto-aes-cmac.c +++ b/drivers/crypto/ccp/ccp-crypto-aes-cmac.c @@ -223,12 +223,15 @@ static int ccp_aes_cmac_digest(struct ah static int ccp_aes_cmac_export(struct ahash_request *req, void *out) { struct ccp_aes_cmac_req_ctx *rctx = ahash_request_ctx(req); - struct ccp_aes_cmac_exp_ctx *state = out; + struct ccp_aes_cmac_exp_ctx state; - state->null_msg = rctx->null_msg; - memcpy(state->iv, rctx->iv, sizeof(state->iv)); - state->buf_count = rctx->buf_count; - memcpy(state->buf, rctx->buf, sizeof(state->buf)); + state.null_msg = rctx->null_msg; + memcpy(state.iv, rctx->iv, sizeof(state.iv)); + state.buf_count = rctx->buf_count; + memcpy(state.buf, rctx->buf, sizeof(state.buf)); + + /* 'out' may not be aligned so memcpy from local variable */ + memcpy(out, &state, sizeof(state)); return 0; } @@ -236,12 +239,15 @@ static int ccp_aes_cmac_export(struct ah static int ccp_aes_cmac_import(struct ahash_request *req, const void *in) { struct ccp_aes_cmac_req_ctx *rctx = ahash_request_ctx(req); - const struct ccp_aes_cmac_exp_ctx *state = in; + struct ccp_aes_cmac_exp_ctx state; + + /* 'in' may not be aligned so memcpy to local variable */ + memcpy(&state, in, sizeof(state)); - rctx->null_msg = state->null_msg; - memcpy(rctx->iv, state->iv, sizeof(rctx->iv)); - rctx->buf_count = state->buf_count; - memcpy(rctx->buf, state->buf, sizeof(rctx->buf)); + rctx->null_msg = state.null_msg; + memcpy(rctx->iv, state.iv, sizeof(rctx->iv)); + rctx->buf_count = state.buf_count; + memcpy(rctx->buf, state.buf, sizeof(rctx->buf)); return 0; } --- a/drivers/crypto/ccp/ccp-crypto-sha.c +++ b/drivers/crypto/ccp/ccp-crypto-sha.c @@ -210,14 +210,17 @@ static int ccp_sha_digest(struct ahash_r static int ccp_sha_export(struct ahash_request *req, void *out) { struct ccp_sha_req_ctx *rctx = ahash_request_ctx(req); - struct ccp_sha_exp_ctx *state = out; + struct ccp_sha_exp_ctx state; - state->type = rctx->type; - state->msg_bits = rctx->msg_bits; - state->first = rctx->first; - memcpy(state->ctx, rctx->ctx, sizeof(state->ctx)); - state->buf_count = rctx->buf_count; - memcpy(state->buf, rctx->buf, sizeof(state->buf)); + state.type = rctx->type; + state.msg_bits = rctx->msg_bits; + state.first = rctx->first; + memcpy(state.ctx, rctx->ctx, sizeof(state.ctx)); + state.buf_count = rctx->buf_count; + memcpy(state.buf, rctx->buf, sizeof(state.buf)); + + /* 'out' may not be aligned so memcpy from local variable */ + memcpy(out, &state, sizeof(state)); return 0; } @@ -225,14 +228,17 @@ static int ccp_sha_export(struct ahash_r static int ccp_sha_import(struct ahash_request *req, const void *in) { struct ccp_sha_req_ctx *rctx = ahash_request_ctx(req); - const struct ccp_sha_exp_ctx *state = in; + struct ccp_sha_exp_ctx state; + + /* 'in' may not be aligned so memcpy to local variable */ + memcpy(&state, in, sizeof(state)); - rctx->type = state->type; - rctx->msg_bits = state->msg_bits; - rctx->first = state->first; - memcpy(rctx->ctx, state->ctx, sizeof(rctx->ctx)); - rctx->buf_count = state->buf_count; - memcpy(rctx->buf, state->buf, sizeof(rctx->buf)); + rctx->type = state.type; + rctx->msg_bits = state.msg_bits; + rctx->first = state.first; + memcpy(rctx->ctx, state.ctx, sizeof(rctx->ctx)); + rctx->buf_count = state.buf_count; + memcpy(rctx->buf, state.buf, sizeof(rctx->buf)); return 0; }