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=-16.4 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT,USER_IN_DEF_DKIM_WL 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 1C716C48BD6 for ; Wed, 26 Jun 2019 12:23:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E9153204FD for ; Wed, 26 Jun 2019 12:23:19 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="bEoviPlE" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727451AbfFZMXS (ORCPT ); Wed, 26 Jun 2019 08:23:18 -0400 Received: from mail-qt1-f201.google.com ([209.85.160.201]:46685 "EHLO mail-qt1-f201.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726104AbfFZMXS (ORCPT ); Wed, 26 Jun 2019 08:23:18 -0400 Received: by mail-qt1-f201.google.com with SMTP id k31so2616697qte.13 for ; Wed, 26 Jun 2019 05:23:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=XRvnKModUVHTmFHrHwuo1MwyIF32UbSI8S8OvJKLAFg=; b=bEoviPlExN6sDh8KZFRQ1yCXcZkyNNLzW3u1pAVA2H1orVPnCYqlhFimU4rLGIWu1f CJpOGN2nBuRm6aQ1agx42bRuCEsvMeS+lSGPOVCQj83C+TNfcSHS6b2Q9MsbfNJHxa4b gl8xVU7JgPgG0I+Idoe82XDGV7mWty68PWMWXPDSHvW+eZwnURw531ZE7Ph55/H3ZEz8 LkKIW3ZgaUPS+I6NBRIMeSLBUT/MyQcadnDaa6eKlh1dKhvqdg0M0hkmoiwKNWT8b2oz r9Tq8XeSManWCswYnmY3NMckuTA9wL4+t5btPnUG6Uy+XvcGYD+kTQy2Dq6NB5BUq40T /i7g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=XRvnKModUVHTmFHrHwuo1MwyIF32UbSI8S8OvJKLAFg=; b=UNohb81+71tRAHGzrMytMx1nrul+uW6mZUz/T9LBs4WlKdW9AMx5Qp54S3FtR1cFy7 GbfaE2iIDHicEYzijXhY2owIH9lxKHjtAYHdHRwjEVx3sNFxsa/rJ17Lq6IlYeHDisfc hhXUaJxgqLaVZtSKHVdAjK392iNqlim22F827YTahOR5NuBeaVkJS44eGL9RIzq+vjIK Vp7/40MG7AV95JHyJRIPDmCWuZo+kXzOjgRYEXWHZyww0XTPvBQb8twkg7yVjIPo5nM7 K4kV1jxpB9r2kXNCNoVHGjwobsxLZkVCigR1cr9KxSaUsFuDlfFea42VVUKg27aDxvd+ NDzA== X-Gm-Message-State: APjAAAX0pbVWpQy9OsjGzggMKzonEOsRqqUWe4MXYlMQMX8rxUcjtX0B GOaR/eWWO/O3mUsZnVMiqwbvU05axA== X-Google-Smtp-Source: APXvYqyIgp9AlDPLRM1loC21o7i15mfv90NTnLoH2+tcZhHtyFvzp4P95svuux+9O3VuzMVNE7vsIN1kvw== X-Received: by 2002:a0c:d604:: with SMTP id c4mr3199153qvj.27.1561551796862; Wed, 26 Jun 2019 05:23:16 -0700 (PDT) Date: Wed, 26 Jun 2019 14:20:17 +0200 In-Reply-To: <20190626122018.171606-1-elver@google.com> Message-Id: <20190626122018.171606-3-elver@google.com> Mime-Version: 1.0 References: <20190626122018.171606-1-elver@google.com> X-Mailer: git-send-email 2.22.0.410.gd8fdbe21b5-goog Subject: [PATCH v2 2/4] lib/test_kasan: Add test for double-kzfree detection From: Marco Elver To: aryabinin@virtuozzo.com, dvyukov@google.com, glider@google.com, andreyknvl@google.com Cc: linux-kernel@vger.kernel.org, Marco Elver , Christoph Lameter , Pekka Enberg , David Rientjes , Joonsoo Kim , Andrew Morton , kasan-dev@googlegroups.com, linux-mm@kvack.org Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Adds a simple test that checks if double-kzfree is being detected correctly. Signed-off-by: Marco Elver Cc: Andrey Ryabinin Cc: Dmitry Vyukov Cc: Alexander Potapenko Cc: Andrey Konovalov Cc: Christoph Lameter Cc: Pekka Enberg Cc: David Rientjes Cc: Joonsoo Kim Cc: Andrew Morton Cc: kasan-dev@googlegroups.com Cc: linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org --- lib/test_kasan.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/lib/test_kasan.c b/lib/test_kasan.c index e3c593c38eff..dda5da9f5bd4 100644 --- a/lib/test_kasan.c +++ b/lib/test_kasan.c @@ -619,6 +619,22 @@ static noinline void __init kasan_strings(void) strnlen(ptr, 1); } +static noinline void __init kmalloc_double_kzfree(void) +{ + char *ptr; + size_t size = 16; + + pr_info("double-free (kzfree)\n"); + ptr = kmalloc(size, GFP_KERNEL); + if (!ptr) { + pr_err("Allocation failed\n"); + return; + } + + kzfree(ptr); + kzfree(ptr); +} + static int __init kmalloc_tests_init(void) { /* @@ -660,6 +676,7 @@ static int __init kmalloc_tests_init(void) kasan_memchr(); kasan_memcmp(); kasan_strings(); + kmalloc_double_kzfree(); kasan_restore_multi_shot(multishot); -- 2.22.0.410.gd8fdbe21b5-goog