From patchwork Fri Jun 4 06:30:35 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hongbo Li X-Patchwork-Id: 12298803 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=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 0E9DEC47097 for ; Fri, 4 Jun 2021 06:32:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DD9A161369 for ; Fri, 4 Jun 2021 06:32:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229835AbhFDGdq (ORCPT ); Fri, 4 Jun 2021 02:33:46 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55944 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229831AbhFDGdp (ORCPT ); Fri, 4 Jun 2021 02:33:45 -0400 Received: from mail-pg1-x52c.google.com (mail-pg1-x52c.google.com [IPv6:2607:f8b0:4864:20::52c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9CED8C06174A; Thu, 3 Jun 2021 23:31:48 -0700 (PDT) Received: by mail-pg1-x52c.google.com with SMTP id 6so7056905pgk.5; Thu, 03 Jun 2021 23:31:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id; bh=6mf9vxePMwOECmPy8sralSQirr3sPMiFyk3gZWElr34=; b=UzaoCm5rigkQe3q0/1uMFf0IfEYML8DOo2gHFqwASxXg5NFZGIXk+LgAs4uiAuvYHz xELF9HMOfAvmYJR4D6L6uYmiCw52i1kR1cgVNe8+jX4KOjjBtFXu2IPgeE0C8bcGb9bM M25zUBGmQ2vkAz/dMq2QEPd0N0ty6WgZBsAYYJqIRxEtUPvC4jLMpCsCxWa55X83u9dl 8/JY+7zwuSG5EcDSy6WW5X+aN3CzKQkU92Q0Gj3YZM7D23DOKRNdLO6B/zGQB46RIHR3 xToeLxOS3FjLst+mkiSB0p/Yjiwxncm1btXsWdQhytrlNFSQl+p8Ktvfs2UHB0uFRCru 2pRg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id; bh=6mf9vxePMwOECmPy8sralSQirr3sPMiFyk3gZWElr34=; b=P6wdlhoCjm0CqPIuxcrKZrFXv5Bpmrw4bJuUNz/YA7yddPk2mzNLhwMBIjEyxy1YUc DBMenPC1d8F13SmiD9KBZGDJRlU58DYOtRzWN0FlYYgpghvGONAJrRpvCFNYfd4bgIJh YKD4e/4XDhZkkQtfRmy2BDLzXU3MoEcAfkDf/FO9boBy3vZoXP7lIyAJujw+8X2jCz5v /Pvo5Xz8Bxp/JL4BSd+8G9DUouo6SIhPUGQNnFygVgy2Xkz8qfsWKG823Dcw+eox2rQO YOSe4DgCASPOAzYMjhsLaeE9SS+1Cdk7Sen2rWjPbyymm/9bNnmRkWrvGMX3giE69m9l KPoA== X-Gm-Message-State: AOAM532eKGFehZVMB1pWqk3FF7CG5xuQCZruqyfjGDtcGZ93gFQMClZ+ 844zmxC5D+sJCKIyW34MP/RcExz8kWc= X-Google-Smtp-Source: ABdhPJzDr60WNJMYjj/y8CllOdQxEg5WmCXFIoIV1asX1ACJyKvsiN15qViND77PePe2P6QUQLd9dA== X-Received: by 2002:a05:6a00:b8a:b029:2ec:761e:33e3 with SMTP id g10-20020a056a000b8ab02902ec761e33e3mr2857730pfj.35.1622788305538; Thu, 03 Jun 2021 23:31:45 -0700 (PDT) Received: from localhost.localdomain ([203.205.141.39]) by smtp.gmail.com with ESMTPSA id z185sm1051178pgb.4.2021.06.03.23.31.43 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Thu, 03 Jun 2021 23:31:45 -0700 (PDT) From: Hongbo Li To: keyrings@vger.kernel.org, linux-crypto@vger.kernel.org, herbert@gondor.apana.org.au, ebiggers@kernel.org, dhowells@redhat.com, jarkko@kernel.org, tianjia.zhang@linux.alibaba.com, herberthbli@tencent.com Cc: linux-kernel@vger.kernel.org Subject: [PATCH v2] crypto: sm2 - fix a memory leak in sm2 Date: Fri, 4 Jun 2021 14:30:35 +0800 Message-Id: <1622788235-10739-1-git-send-email-herbert.tencent@gmail.com> X-Mailer: git-send-email 1.8.3.1 Precedence: bulk List-ID: X-Mailing-List: keyrings@vger.kernel.org From: Hongbo Li SM2 module alloc ec->Q in sm2_set_pub_key(), when doing alg test in test_akcipher_one(), it will set public key for every test vector, and don't free ec->Q. This will cause a memory leak. This patch alloc ec->Q in sm2_ec_ctx_init(). Fixes: ea7ecb66440b ("crypto: sm2 - introduce OSCCA SM2 asymmetric cipher algorithm") Signed-off-by: Hongbo Li Reviewed-by: Tianjia Zhang --- crypto/sm2.c | 24 ++++++++++-------------- 1 file changed, 10 insertions(+), 14 deletions(-) diff --git a/crypto/sm2.c b/crypto/sm2.c index b21addc..db8a4a2 100644 --- a/crypto/sm2.c +++ b/crypto/sm2.c @@ -79,10 +79,17 @@ static int sm2_ec_ctx_init(struct mpi_ec_ctx *ec) goto free; rc = -ENOMEM; + + ec->Q = mpi_point_new(0); + if (!ec->Q) + goto free; + /* mpi_ec_setup_elliptic_curve */ ec->G = mpi_point_new(0); - if (!ec->G) + if (!ec->G) { + mpi_point_release(ec->Q); goto free; + } mpi_set(ec->G->x, x); mpi_set(ec->G->y, y); @@ -91,6 +98,7 @@ static int sm2_ec_ctx_init(struct mpi_ec_ctx *ec) rc = -EINVAL; ec->n = mpi_scanval(ecp->n); if (!ec->n) { + mpi_point_release(ec->Q); mpi_point_release(ec->G); goto free; } @@ -386,27 +394,15 @@ static int sm2_set_pub_key(struct crypto_akcipher *tfm, MPI a; int rc; - ec->Q = mpi_point_new(0); - if (!ec->Q) - return -ENOMEM; - /* include the uncompressed flag '0x04' */ - rc = -ENOMEM; a = mpi_read_raw_data(key, keylen); if (!a) - goto error; + return -ENOMEM; mpi_normalize(a); rc = sm2_ecc_os2ec(ec->Q, a); mpi_free(a); - if (rc) - goto error; - - return 0; -error: - mpi_point_release(ec->Q); - ec->Q = NULL; return rc; }