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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 860D4C433EF for ; Thu, 10 Mar 2022 08:08:03 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id CDDFE8D0002; Thu, 10 Mar 2022 03:08:02 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id C8EDE8D0001; Thu, 10 Mar 2022 03:08:02 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id B7BF28D0002; Thu, 10 Mar 2022 03:08:02 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0168.hostedemail.com [216.40.44.168]) by kanga.kvack.org (Postfix) with ESMTP id A84898D0001 for ; Thu, 10 Mar 2022 03:08:02 -0500 (EST) Received: from smtpin18.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id 5AAA6181CA753 for ; Thu, 10 Mar 2022 08:08:02 +0000 (UTC) X-FDA: 79227748404.18.F015DD8 Received: from mail-ej1-f41.google.com (mail-ej1-f41.google.com [209.85.218.41]) by imf05.hostedemail.com (Postfix) with ESMTP id E4F7610000E for ; Thu, 10 Mar 2022 08:08:01 +0000 (UTC) Received: by mail-ej1-f41.google.com with SMTP id kt27so10415720ejb.0 for ; Thu, 10 Mar 2022 00:08:01 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=qgU1YiosBtNsX8vphzejZ6JG2mH1MwmM6we31LMy0vU=; b=XLRUu4GLZhPreZ806DmRXf99JDmVKiWPeD1LAmNi7iFs6z59L9i4F/jRJrJzqAuARi YAmhAmHeyyGhZBCOKFVLcVeIEULX25XpOtWyaOv66sQiLWnG03dQqvp6x10xSzfMN31O +/KwWBXJfLYujoJ8RwtBipptXGR7a+5ojbcQ2nXwtJA0WLUC9YEVbJ/tyizIz3MPYhRL /FMfBvFlNFGA8ztjCHVRzSwYlGlWTQatA7xT0yVR8mVHOnHBKTJ7GqntDNZXtfxfmT99 VRwDwzUKVLKrTIHdhlsq0P/caDi8xYsldEGJKFEwrYgVGk82TH18IxXM9pMzHhbS8zXW U7BQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=qgU1YiosBtNsX8vphzejZ6JG2mH1MwmM6we31LMy0vU=; b=Pei2YO+lxLya7afwg6jiW9eb3luQmSA4wRYVqg/1tpo55YtyS5a5h3ESauq0tlC2Jj Ht4PTYz6PmvOy2RzsmYfEWQcT4jcYZzzF3EHh1+g1jYlElcmihN2IwLxNYKz/Ys7RrdB +jZ7Z3V/OjTT4zS8skCVvKi+PvDSQ66sjXvBirIlVBXUNmpRhYDL9FJcRHox6j43kDva ZFiUXCoC8R+TKfHx3V1IpIuXaAVDnCm2H7NxtKURakDKt4u61vkbAtJaf2nRN9TkHn5J xORVUpvdGNyuuKKQvOzUwQM+USPYitK6iBWynKitM7HQBJcChegLwCXfIyvFJnXJ6B2p KBwQ== X-Gm-Message-State: AOAM532SMfp2kM1Yl4SDuqyPHWYkPNmhNTRjGm33YxezmOLelxc0zRjb tyhS3WTdIIf8zG1dc8bcroTLQVy8ODKLOdJwS2p7XA== X-Google-Smtp-Source: ABdhPJyk8Rd7RVAixssO/1MkmMF/h7pn5Vdo7uxGHhPCpqNsEQqkq7TGhVTpdF1GQhCClhgrzKqe7Q7gtj9jsduNMHU= X-Received: by 2002:a17:906:2899:b0:6d6:e479:1fe2 with SMTP id o25-20020a170906289900b006d6e4791fe2mr3149308ejd.394.1646899680427; Thu, 10 Mar 2022 00:08:00 -0800 (PST) MIME-Version: 1.0 References: <20220309083753.1561921-1-liupeng256@huawei.com> In-Reply-To: <20220309083753.1561921-1-liupeng256@huawei.com> From: Brendan Higgins Date: Thu, 10 Mar 2022 03:07:48 -0500 Message-ID: Subject: Re: [PATCH v2 0/3] kunit: fix a UAF bug and do some optimization To: Peng Liu Cc: glider@google.com, elver@google.com, dvyukov@google.com, akpm@linux-foundation.org, linux-kselftest@vger.kernel.org, kunit-dev@googlegroups.com, linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com, linux-mm@kvack.org, wangkefeng.wang@huawei.com Content-Type: text/plain; charset="UTF-8" X-Rspamd-Queue-Id: E4F7610000E X-Stat-Signature: 37n1oqbbkf8qand1pp1o55gwb1qrjibj X-Rspam-User: Authentication-Results: imf05.hostedemail.com; dkim=pass header.d=google.com header.s=20210112 header.b=XLRUu4GL; spf=pass (imf05.hostedemail.com: domain of brendanhiggins@google.com designates 209.85.218.41 as permitted sender) smtp.mailfrom=brendanhiggins@google.com; dmarc=pass (policy=reject) header.from=google.com X-Rspamd-Server: rspam07 X-HE-Tag: 1646899681-904831 X-Bogosity: Ham, tests=bogofilter, spamicity=0.052771, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Wed, Mar 9, 2022 at 3:19 AM 'Peng Liu' via KUnit Development wrote: > > This series is to fix UAF when running kfence test case test_gfpzero, > which is time costly. This UAF bug can be easily triggered by setting > CONFIG_KFENCE_NUM_OBJECTS = 65535. Furthermore, some optimization for > kunit tests has been done. I was able to reproduce the error you described and can confirm that I didn't see the UAF after applying your patches. Tested-by: Brendan Higgins