From patchwork Fri May 6 14:38:59 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Cabiddu, Giovanni" X-Patchwork-Id: 570259 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E31E7C43219 for ; Fri, 6 May 2022 14:39:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1442299AbiEFOnf (ORCPT ); Fri, 6 May 2022 10:43:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35962 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1442324AbiEFOnY (ORCPT ); Fri, 6 May 2022 10:43:24 -0400 Received: from mga12.intel.com (mga12.intel.com [192.55.52.136]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 030236AA61; Fri, 6 May 2022 07:39:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1651847978; x=1683383978; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=QsLQfLxR5EUPwOSoTRZKB6lv00b/kqBdk2OSm6FD6GI=; b=bPtrRJW5TZIemQ+GwRSSNw6aSmfhmuyK+HAjFiVPNH40KACklkNA7loD lnYvu9sNEPapiwn+i9NcKk/R8+O/hdWMLvnqa1TKJidX/cfl1+iN0rYTW nlr+QkK5Cy/j0IIVWK7VBS37wVsKIa7QijypcbUfPTLEaG+o+n9lVN1rY /umiVNoacbjLKtxTOq02JtxIA6txbR2ntk7Bqhmeexmaus2AyNK5BnGLu x/2EGZ4Z1TO8dDBYusWGU8ZQ/RQ0K1OJ8LUakDvNulpTL1nVXclXH2uQb iafp92d+6Q7LOTXjwN4SyNCm0WdCtbITivRZsiRVOOYs78dLd8PfL20lY g==; X-IronPort-AV: E=McAfee;i="6400,9594,10339"; a="248387489" X-IronPort-AV: E=Sophos;i="5.91,203,1647327600"; d="scan'208";a="248387489" Received: from orsmga006.jf.intel.com ([10.7.209.51]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 May 2022 07:39:22 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.91,203,1647327600"; d="scan'208";a="537914859" Received: from silpixa00400314.ir.intel.com (HELO silpixa00400314.ger.corp.intel.com) ([10.237.222.76]) by orsmga006.jf.intel.com with ESMTP; 06 May 2022 07:39:20 -0700 From: Giovanni Cabiddu To: herbert@gondor.apana.org.au Cc: linux-crypto@vger.kernel.org, qat-linux@intel.com, vdronov@redhat.com, Giovanni Cabiddu , stable@vger.kernel.org, Adam Guerin , Wojciech Ziemba Subject: [PATCH v2 07/11] crypto: qat - set to zero DH parameters before free Date: Fri, 6 May 2022 15:38:59 +0100 Message-Id: <20220506143903.31776-8-giovanni.cabiddu@intel.com> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220506143903.31776-1-giovanni.cabiddu@intel.com> References: <20220506143903.31776-1-giovanni.cabiddu@intel.com> MIME-Version: 1.0 Organization: Intel Research and Development Ireland Ltd - Co. Reg. #308263 - Collinstown Industrial Park, Leixlip, County Kildare - Ireland Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org Set to zero the DH context buffers containing the DH key before they are freed. This is to make sure keys are not leaked out by a subsequent memory allocation. Cc: stable@vger.kernel.org Fixes: c9839143ebbf ("crypto: qat - Add DH support") Signed-off-by: Giovanni Cabiddu Reviewed-by: Adam Guerin Reviewed-by: Wojciech Ziemba --- drivers/crypto/qat/qat_common/qat_asym_algs.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/crypto/qat/qat_common/qat_asym_algs.c b/drivers/crypto/qat/qat_common/qat_asym_algs.c index d75eb77c9fb9..25bbd22085c3 100644 --- a/drivers/crypto/qat/qat_common/qat_asym_algs.c +++ b/drivers/crypto/qat/qat_common/qat_asym_algs.c @@ -421,14 +421,17 @@ static int qat_dh_set_params(struct qat_dh_ctx *ctx, struct dh *params) static void qat_dh_clear_ctx(struct device *dev, struct qat_dh_ctx *ctx) { if (ctx->g) { + memset(ctx->g, 0, ctx->p_size); dma_free_coherent(dev, ctx->p_size, ctx->g, ctx->dma_g); ctx->g = NULL; } if (ctx->xa) { + memset(ctx->xa, 0, ctx->p_size); dma_free_coherent(dev, ctx->p_size, ctx->xa, ctx->dma_xa); ctx->xa = NULL; } if (ctx->p) { + memset(ctx->p, 0, ctx->p_size); dma_free_coherent(dev, ctx->p_size, ctx->p, ctx->dma_p); ctx->p = NULL; }