From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6B0AEC4321A for ; Tue, 11 Jun 2019 15:59:17 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id E85F3212F5 for ; Tue, 11 Jun 2019 15:59:16 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=c-s.fr header.i=@c-s.fr header.b="Gri0k6yz" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E85F3212F5 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=c-s.fr Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 45NZSL49F3zDqWY for ; Wed, 12 Jun 2019 01:59:14 +1000 (AEST) Authentication-Results: lists.ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=c-s.fr (client-ip=93.17.236.30; helo=pegase1.c-s.fr; envelope-from=christophe.leroy@c-s.fr; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=c-s.fr Authentication-Results: lists.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=c-s.fr header.i=@c-s.fr header.b="Gri0k6yz"; dkim-atps=neutral Received: from pegase1.c-s.fr (pegase1.c-s.fr [93.17.236.30]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 45NXhn4Qn9zDqVb for ; Wed, 12 Jun 2019 00:39:53 +1000 (AEST) Received: from localhost (mailhub1-int [192.168.12.234]) by localhost (Postfix) with ESMTP id 45NXhh5prfz9v1Ds; Tue, 11 Jun 2019 16:39:48 +0200 (CEST) Authentication-Results: localhost; dkim=pass reason="1024-bit key; insecure key" header.d=c-s.fr header.i=@c-s.fr header.b=Gri0k6yz; dkim-adsp=pass; dkim-atps=neutral X-Virus-Scanned: Debian amavisd-new at c-s.fr Received: from pegase1.c-s.fr ([192.168.12.234]) by localhost (pegase1.c-s.fr [192.168.12.234]) (amavisd-new, port 10024) with ESMTP id B9Pp4oR4jRxz; Tue, 11 Jun 2019 16:39:48 +0200 (CEST) Received: from messagerie.si.c-s.fr (messagerie.si.c-s.fr [192.168.25.192]) by pegase1.c-s.fr (Postfix) with ESMTP id 45NXhh4gNKz9v04R; Tue, 11 Jun 2019 16:39:48 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=c-s.fr; s=mail; t=1560263988; bh=yw0KidK0m5muNxtu+RYk0wgogjfjWM4FQ5D8HJ1MCb0=; h=In-Reply-To:References:From:Subject:To:Cc:Date:From; b=Gri0k6yzrZLJ7IDgFvP0Eypgu4mMQZVeDauH+BpH0pFTKNv1AznGKJ3YR7MPqQJT4 +DhOnBRyl6mEH041Qngz7LwJsvFUyCxkRl94mOt107k9EF/D0fmhXPgxnk7wopDsjh cLKwNNXSqgAj4cai0zMabn8J8bMEMMylQ6d+qYL8= Received: from localhost (localhost [127.0.0.1]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 2930A8B7F4; Tue, 11 Jun 2019 16:39:50 +0200 (CEST) X-Virus-Scanned: amavisd-new at c-s.fr Received: from messagerie.si.c-s.fr ([127.0.0.1]) by localhost (messagerie.si.c-s.fr [127.0.0.1]) (amavisd-new, port 10023) with ESMTP id dfx7psa-LTts; Tue, 11 Jun 2019 16:39:50 +0200 (CEST) Received: from po16838vm.idsi0.si.c-s.fr (unknown [192.168.4.90]) by messagerie.si.c-s.fr (Postfix) with ESMTP id C15C08B75B; Tue, 11 Jun 2019 16:39:49 +0200 (CEST) Received: by po16838vm.idsi0.si.c-s.fr (Postfix, from userid 0) id 94BA168CE5; Tue, 11 Jun 2019 14:39:49 +0000 (UTC) Message-Id: <95787c72626444e96cf10c7d1f0bf20f0da5beb3.1560263641.git.christophe.leroy@c-s.fr> In-Reply-To: References: From: Christophe Leroy Subject: [PATCH v2 2/4] crypto: talitos - fix hash on SEC1. To: Herbert Xu , "David S. Miller" , horia.geanta@nxp.com Date: Tue, 11 Jun 2019 14:39:49 +0000 (UTC) X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linuxppc-dev@lists.ozlabs.org, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On SEC1, hash provides wrong result when performing hashing in several steps with input data SG list has more than one element. This was detected with CONFIG_CRYPTO_MANAGER_EXTRA_TESTS: [ 44.185947] alg: hash: md5-talitos test failed (wrong result) on test vector 6, cfg="random: may_sleep use_finup src_divs=[25.88%@+8063, 24.19%@+9588, 28.63%@+16333, 4.60%@+6756, 16.70%@+16281] dst_divs=[71.61%@alignmask+16361, 14.36%@+7756, 14.3%@+" [ 44.325122] alg: hash: sha1-talitos test failed (wrong result) on test vector 3, cfg="random: inplace use_final src_divs=[16.56%@+16378, 52.0%@+16329, 21.42%@alignmask+16380, 10.2%@alignmask+16380] iv_offset=39" [ 44.493500] alg: hash: sha224-talitos test failed (wrong result) on test vector 4, cfg="random: use_final nosimd src_divs=[52.27%@+7401, 17.34%@+16285, 17.71%@+26, 12.68%@+10644] iv_offset=43" [ 44.673262] alg: hash: sha256-talitos test failed (wrong result) on test vector 4, cfg="random: may_sleep use_finup src_divs=[60.6%@+12790, 17.86%@+1329, 12.64%@alignmask+16300, 8.29%@+15, 0.40%@+13506, 0.51%@+16322, 0.24%@+16339] dst_divs" This is due to two issues: - We have an overlap between the buffer used for copying the input data (SEC1 doesn't do scatter/gather) and the chained descriptor. - Data copy is wrong when the previous hash left less than one blocksize of data to hash, implying a complement of the previous block with a few bytes from the new request. This patch fixes it by: - Moving the second descriptor after the buffer, as moving the buffer after the descriptor would make it more complex for other cipher operations (AEAD, ABLKCIPHER) - Rebuiding a new data SG list without the bytes taken from the new request to complete the previous one. Fixes: 37b5e8897eb5 ("crypto: talitos - chain in buffered data for ahash on SEC1") Cc: stable@vger.kernel.org Signed-off-by: Christophe Leroy --- drivers/crypto/talitos.c | 63 ++++++++++++++++++++++++++++++------------------ 1 file changed, 40 insertions(+), 23 deletions(-) diff --git a/drivers/crypto/talitos.c b/drivers/crypto/talitos.c index 5b401aec6c84..4f03baef952b 100644 --- a/drivers/crypto/talitos.c +++ b/drivers/crypto/talitos.c @@ -336,15 +336,18 @@ static void flush_channel(struct device *dev, int ch, int error, int reset_ch) tail = priv->chan[ch].tail; while (priv->chan[ch].fifo[tail].desc) { __be32 hdr; + struct talitos_edesc *edesc; request = &priv->chan[ch].fifo[tail]; + edesc = container_of(request->desc, struct talitos_edesc, desc); /* descriptors with their done bits set don't get the error */ rmb(); if (!is_sec1) hdr = request->desc->hdr; else if (request->desc->next_desc) - hdr = (request->desc + 1)->hdr1; + hdr = ((struct talitos_desc *) + (edesc->buf + edesc->dma_len))->hdr1; else hdr = request->desc->hdr1; @@ -476,8 +479,14 @@ static u32 current_desc_hdr(struct device *dev, int ch) } } - if (priv->chan[ch].fifo[iter].desc->next_desc == cur_desc) - return (priv->chan[ch].fifo[iter].desc + 1)->hdr; + if (priv->chan[ch].fifo[iter].desc->next_desc == cur_desc) { + struct talitos_edesc *edesc; + + edesc = container_of(priv->chan[ch].fifo[iter].desc, + struct talitos_edesc, desc); + return ((struct talitos_desc *) + (edesc->buf + edesc->dma_len))->hdr; + } return priv->chan[ch].fifo[iter].desc->hdr; } @@ -1402,15 +1411,11 @@ static struct talitos_edesc *talitos_edesc_alloc(struct device *dev, edesc->dst_nents = dst_nents; edesc->iv_dma = iv_dma; edesc->dma_len = dma_len; - if (dma_len) { - void *addr = &edesc->link_tbl[0]; - - if (is_sec1 && !dst) - addr += sizeof(struct talitos_desc); - edesc->dma_link_tbl = dma_map_single(dev, addr, + if (dma_len) + edesc->dma_link_tbl = dma_map_single(dev, &edesc->link_tbl[0], edesc->dma_len, DMA_BIDIRECTIONAL); - } + return edesc; } @@ -1722,14 +1727,16 @@ static void common_nonsnoop_hash_unmap(struct device *dev, struct talitos_private *priv = dev_get_drvdata(dev); bool is_sec1 = has_ftr_sec1(priv); struct talitos_desc *desc = &edesc->desc; - struct talitos_desc *desc2 = desc + 1; + struct talitos_desc *desc2 = (struct talitos_desc *) + (edesc->buf + edesc->dma_len); unmap_single_talitos_ptr(dev, &edesc->desc.ptr[5], DMA_FROM_DEVICE); if (desc->next_desc && desc->ptr[5].ptr != desc2->ptr[5].ptr) unmap_single_talitos_ptr(dev, &desc2->ptr[5], DMA_FROM_DEVICE); - talitos_sg_unmap(dev, edesc, req_ctx->psrc, NULL, 0, 0); + if (req_ctx->psrc) + talitos_sg_unmap(dev, edesc, req_ctx->psrc, NULL, 0, 0); /* When using hashctx-in, must unmap it. */ if (from_talitos_ptr_len(&edesc->desc.ptr[1], is_sec1)) @@ -1796,7 +1803,6 @@ static void talitos_handle_buggy_hash(struct talitos_ctx *ctx, static int common_nonsnoop_hash(struct talitos_edesc *edesc, struct ahash_request *areq, unsigned int length, - unsigned int offset, void (*callback) (struct device *dev, struct talitos_desc *desc, void *context, int error)) @@ -1835,9 +1841,7 @@ static int common_nonsnoop_hash(struct talitos_edesc *edesc, sg_count = edesc->src_nents ?: 1; if (is_sec1 && sg_count > 1) - sg_pcopy_to_buffer(req_ctx->psrc, sg_count, - edesc->buf + sizeof(struct talitos_desc), - length, req_ctx->nbuf); + sg_copy_to_buffer(req_ctx->psrc, sg_count, edesc->buf, length); else if (length) sg_count = dma_map_sg(dev, req_ctx->psrc, sg_count, DMA_TO_DEVICE); @@ -1850,7 +1854,7 @@ static int common_nonsnoop_hash(struct talitos_edesc *edesc, DMA_TO_DEVICE); } else { sg_count = talitos_sg_map(dev, req_ctx->psrc, length, edesc, - &desc->ptr[3], sg_count, offset, 0); + &desc->ptr[3], sg_count, 0, 0); if (sg_count > 1) sync_needed = true; } @@ -1874,7 +1878,8 @@ static int common_nonsnoop_hash(struct talitos_edesc *edesc, talitos_handle_buggy_hash(ctx, edesc, &desc->ptr[3]); if (is_sec1 && req_ctx->nbuf && length) { - struct talitos_desc *desc2 = desc + 1; + struct talitos_desc *desc2 = (struct talitos_desc *) + (edesc->buf + edesc->dma_len); dma_addr_t next_desc; memset(desc2, 0, sizeof(*desc2)); @@ -1895,7 +1900,7 @@ static int common_nonsnoop_hash(struct talitos_edesc *edesc, DMA_TO_DEVICE); copy_talitos_ptr(&desc2->ptr[2], &desc->ptr[2], is_sec1); sg_count = talitos_sg_map(dev, req_ctx->psrc, length, edesc, - &desc2->ptr[3], sg_count, offset, 0); + &desc2->ptr[3], sg_count, 0, 0); if (sg_count > 1) sync_needed = true; copy_talitos_ptr(&desc2->ptr[5], &desc->ptr[5], is_sec1); @@ -2006,7 +2011,6 @@ static int ahash_process_req(struct ahash_request *areq, unsigned int nbytes) struct device *dev = ctx->dev; struct talitos_private *priv = dev_get_drvdata(dev); bool is_sec1 = has_ftr_sec1(priv); - int offset = 0; u8 *ctx_buf = req_ctx->buf[req_ctx->buf_idx]; if (!req_ctx->last && (nbytes + req_ctx->nbuf <= blocksize)) { @@ -2046,6 +2050,9 @@ static int ahash_process_req(struct ahash_request *areq, unsigned int nbytes) sg_chain(req_ctx->bufsl, 2, areq->src); req_ctx->psrc = req_ctx->bufsl; } else if (is_sec1 && req_ctx->nbuf && req_ctx->nbuf < blocksize) { + int offset; + struct scatterlist *sg; + if (nbytes_to_hash > blocksize) offset = blocksize - req_ctx->nbuf; else @@ -2058,7 +2065,18 @@ static int ahash_process_req(struct ahash_request *areq, unsigned int nbytes) sg_copy_to_buffer(areq->src, nents, ctx_buf + req_ctx->nbuf, offset); req_ctx->nbuf += offset; - req_ctx->psrc = areq->src; + for (sg = areq->src; sg && offset >= sg->length; + offset -= sg->length, sg = sg_next(sg)) + ; + if (offset) { + sg_init_table(req_ctx->bufsl, 2); + sg_set_buf(req_ctx->bufsl, sg_virt(sg) + offset, + sg->length - offset); + sg_chain(req_ctx->bufsl, 2, sg_next(sg)); + req_ctx->psrc = req_ctx->bufsl; + } else { + req_ctx->psrc = sg; + } } else req_ctx->psrc = areq->src; @@ -2098,8 +2116,7 @@ static int ahash_process_req(struct ahash_request *areq, unsigned int nbytes) if (ctx->keylen && (req_ctx->first || req_ctx->last)) edesc->desc.hdr |= DESC_HDR_MODE0_MDEU_HMAC; - return common_nonsnoop_hash(edesc, areq, nbytes_to_hash, offset, - ahash_done); + return common_nonsnoop_hash(edesc, areq, nbytes_to_hash, ahash_done); } static int ahash_update(struct ahash_request *areq) -- 2.13.3