From patchwork Sat Sep 23 00:54:04 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ma Ke X-Patchwork-Id: 725962 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 6651ACE7A88 for ; Sat, 23 Sep 2023 00:55:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230461AbjIWAzW (ORCPT ); Fri, 22 Sep 2023 20:55:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51510 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230440AbjIWAzV (ORCPT ); Fri, 22 Sep 2023 20:55:21 -0400 Received: from m15.mail.163.com (m15.mail.163.com [45.254.50.219]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 58693B9; Fri, 22 Sep 2023 17:55:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=From:Subject:Date:Message-Id:MIME-Version; bh=iDdID +mUbQqXmzWzgfAKYDj+iqF4rEcFDTg8Favomh0=; b=O/v7DGkp6qzTXQG7g2Rlf ux+K1pd8QCc3utMyeaub9ITi6//M9FuwEQpbB2wJKNx/KwFrwjDGwACyUOk2l8hL 2bFWHEYhDqWjRJuni8KrDzk+QsOM3IPEXUbRSjZEuGem4iu9Z7MJtATKNuH7qnB+ X9WvAdWFgplnnv9Vg/m39c= Received: from icess-ProLiant-DL380-Gen10.. (unknown [183.174.60.14]) by zwqz-smtp-mta-g0-1 (Coremail) with SMTP id _____wCnzvMuNw5lHGodBA--.12688S4; Sat, 23 Sep 2023 08:54:17 +0800 (CST) From: Ma Ke To: davidgow@google.com Cc: linux-kselftest@vger.kernel.org, kunit-dev@googlegroups.com, linux-kernel@vger.kernel.org, Ma Ke Subject: [PATCH v3] list: test: potential dereference of null pointer Date: Sat, 23 Sep 2023 08:54:04 +0800 Message-Id: <20230923005404.3633619-1-make_ruc2021@163.com> X-Mailer: git-send-email 2.37.2 MIME-Version: 1.0 X-CM-TRANSID: _____wCnzvMuNw5lHGodBA--.12688S4 X-Coremail-Antispam: 1Uf129KBjvdXoWrurWkJw47urWxGw15uw47XFb_yoWkJFX_Za yxAr1kWr1UJrWxtFn5Jr4rZ3WkKw1kZF1vqa93Kry3AFy7Cr18C3W2vr4fJ3y3WrWfCa9I kw4DCr1UGw1DGjkaLaAFLSUrUUUUUb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUvcSsGvfC2KfnxnUUI43ZEXa7xRM5l8UUUUUU== X-Originating-IP: [183.174.60.14] X-CM-SenderInfo: 5pdnvshuxfjiisr6il2tof0z/xtbBFRnzC2B9oOTR4gAAse Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org To avoid the failure of alloc, we could check the return value of kmalloc() and kzalloc(). Signed-off-by: Ma Ke Reviewed-by: David Gow --- lib/list-test.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/lib/list-test.c b/lib/list-test.c index 0cc27de9cec8..a0b478042477 100644 --- a/lib/list-test.c +++ b/lib/list-test.c @@ -26,10 +26,12 @@ static void list_test_list_init(struct kunit *test) INIT_LIST_HEAD(&list2); - list4 = kzalloc(sizeof(*list4), GFP_KERNEL | __GFP_NOFAIL); + list4 = kunit_kzalloc(test, sizeof(*list4), GFP_KERNEL | __GFP_NOFAIL); + KUNIT_ASSERT_NOT_NULL(test, list4); INIT_LIST_HEAD(list4); list5 = kmalloc(sizeof(*list5), GFP_KERNEL | __GFP_NOFAIL); + KUNIT_ASSERT_NOT_NULL(test, list5); memset(list5, 0xFF, sizeof(*list5)); INIT_LIST_HEAD(list5); @@ -40,7 +42,6 @@ static void list_test_list_init(struct kunit *test) KUNIT_EXPECT_TRUE(test, list_empty_careful(list4)); KUNIT_EXPECT_TRUE(test, list_empty_careful(list5)); - kfree(list4); kfree(list5); }