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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 273ABC433F5 for ; Thu, 30 Dec 2021 02:56:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235051AbhL3Cwh (ORCPT ); Wed, 29 Dec 2021 21:52:37 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55982 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234683AbhL3Cwg (ORCPT ); Wed, 29 Dec 2021 21:52:36 -0500 Received: from mail-pf1-x433.google.com (mail-pf1-x433.google.com [IPv6:2607:f8b0:4864:20::433]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B7AFBC061574 for ; Wed, 29 Dec 2021 18:52:36 -0800 (PST) Received: by mail-pf1-x433.google.com with SMTP id t123so20170116pfc.13 for ; Wed, 29 Dec 2021 18:52:36 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=3jccTyg7vrHF0S+bQCJ8I8LSXrcz5SWfRQTdxjUX7Eg=; b=Exid+35BwV0SaQHC8U/1Dv5xnBLGbIkK4hPRUTKAErw5FZIN0rAkhKqRU28ADtz25N RiFQP7/whNm52s+b+m1dT6VfKxy10uv3bQmR4z1pezShQkNHpETDTvP8gNVuTeghKdFn 8XGjSZ8eqjyTsOMKMdwSD2Epn2B7F2eWTwxa/L/syDtSAGWBENEbJejInMzzjzUdOxmJ VAsKYfuQ8Eh34stFd8f++yCEG6XtBD4ZWGXp0w6/Ps2M8Kaa5bZEXWPqk25VxsxW2uIJ uRMSX3qHL04isOr4qOpvdLVBky7aNT0SGjTXCppOqLO82H9WbocHb9uT745oUXxeZPH1 gr8A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=3jccTyg7vrHF0S+bQCJ8I8LSXrcz5SWfRQTdxjUX7Eg=; b=cpa57xlfKAJFBcaJnZzXbegpxbAHuhNKJ12Mq0NyVnq+kf5rTovuEwoGlM6bFpvh6f LVttfb1IIXVDWuYdflSQ9KmqHKbIhj9OnKi26ya2c235XsVOfDywOrFDJ2mwPS7VNO5n i2YP+XPMRtHGKkW44QLOH0aMhPO2zhqBVzSdVAenWLiEY+k3/o/Q50PVZ4p/5+0NkEMT HqTX8NJQ1fFrQ/FwIAvxP2ypI6iLA8Lw28xtACc3kukAHUsHVtZs+/o2AA+TRJ7f7ZcX FdsWZ9y+E4d4+7W6r0l8CZz/nk3ryBPx4npIsEDhGywdr0wEXzEbAXNBQhC9p/JosYF5 MStw== X-Gm-Message-State: AOAM530njyqgxZwQm2l8DZjO4vlAr9bPT0PfoZnzQcWzTSvkJasFXpdG Yd+3ki8pckjGIRXFbYPYmABCia97ky+fjBiD X-Google-Smtp-Source: ABdhPJyZ6TsOmlLJCev7bA9yhfbhmmrXD9ZDL+4SoNf+uDsEdc86AzAli2yBm/zkPpVGx2QfU6Mw9Q== X-Received: by 2002:a63:7519:: with SMTP id q25mr24245362pgc.597.1640832755717; Wed, 29 Dec 2021 18:52:35 -0800 (PST) Received: from localhost.localdomain ([159.226.95.43]) by smtp.gmail.com with ESMTPSA id f8sm21271449pga.69.2021.12.29.18.52.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 29 Dec 2021 18:52:35 -0800 (PST) From: Zizhuang Deng To: linux-kernel@vger.kernel.org Cc: tianjia.zhang@linux.alibaba.com, Zizhuang Deng Subject: [PATCH] lib/mpi: add the return value check of kcalloc Date: Thu, 30 Dec 2021 10:51:59 +0800 Message-Id: <20211230025159.460218-1-sunsetdzz@gmail.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add the return value check of kcalloc to avoid potential NULL ptr dereference. Signed-off-by: Zizhuang Deng --- lib/mpi/mpi-mod.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/lib/mpi/mpi-mod.c b/lib/mpi/mpi-mod.c index 47bc59edd4ff..6fd6900f0798 100644 --- a/lib/mpi/mpi-mod.c +++ b/lib/mpi/mpi-mod.c @@ -41,6 +41,10 @@ mpi_barrett_t mpi_barrett_init(MPI m, int copy) mpi_normalize(m); ctx = kcalloc(1, sizeof(*ctx), GFP_KERNEL); + if (!ctx) { + return NULL; + } + if (copy) { ctx->m = mpi_copy(m); ctx->m_copied = 1; -- 2.25.1