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 CB087C433EF for ; Wed, 9 Mar 2022 06:12:47 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 6068B8D000F; Wed, 9 Mar 2022 01:12:47 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 5B6358D0001; Wed, 9 Mar 2022 01:12:47 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 4A4F38D000F; Wed, 9 Mar 2022 01:12:47 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0017.hostedemail.com [216.40.44.17]) by kanga.kvack.org (Postfix) with ESMTP id 3BD1C8D0001 for ; Wed, 9 Mar 2022 01:12:47 -0500 (EST) Received: from smtpin23.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id E3987182229F8 for ; Wed, 9 Mar 2022 06:12:46 +0000 (UTC) X-FDA: 79223829132.23.CE9AFDD Received: from mail-yb1-f174.google.com (mail-yb1-f174.google.com [209.85.219.174]) by imf22.hostedemail.com (Postfix) with ESMTP id 6ACFDC0012 for ; Wed, 9 Mar 2022 06:12:46 +0000 (UTC) Received: by mail-yb1-f174.google.com with SMTP id u10so2221006ybd.9 for ; Tue, 08 Mar 2022 22:12:46 -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=//61snb4FzOH8xBVPrGQSTEOIUqrxrg6uRM2aNBozZM=; b=aPuBcekGsi9P0Kiu8PsroQfxh8B7CEY6shdyL04CVPdMJL6Vm6jfWWpHEHG1Fy0XCI GicYeww/yzqyXCzvC5YdjEZFIExYDrgeI/8dY4G6cnKzSNAeD1htsJz3jwdB7ZezvpcI ylPESixpZyteiQ/IQRd2ehwVVjzir7EsJKcOixe1Z3QO8g8FDQoJfrNU45RyKvdfTHHu P+FpBA+pNBsiQs8uFtzHz3kyaBobyaGwOMezcQjGxCeeFEOdfYGCAySUaS22L1nwRdd1 13S+33dJMoLs+nUmw8i2TilPRzHjdU82xpE2FGuCH9WG3bb3N5YFi01j1KSS7Oa2fDfu 9U6Q== 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=//61snb4FzOH8xBVPrGQSTEOIUqrxrg6uRM2aNBozZM=; b=lM01pKhSCkfWAg0cG689wWYH9HAnjUxs0yZ7M4Z8lZ5eNkhRy7kmr/tVJjKQDbqmRY OdDtlXclUTIimp1TD0CMISNSM3Yc9Sbui2t/ps/Zjzcw6GKBT4NRDmR+NtbLZ4U8fZY4 8pjvtBBwbxo8TcCPV+DsbyyoKjT5dAhU53CWeBzXs83LM9yC17JrfqIWn3OIiE86Sh8O F6yWL0MWifBZ9tvLsT+4Y5BggHz1h5wU0ooiOD/04ITKLWfqOPO5nmP+I4uifROBBuuH Ofu3gEB0fLOjT0QwuFn8FgWAF0aBAgMFX0JHwrYa4NkVaDQQlqPw9DAmhmY73i2CWyM9 QGDQ== X-Gm-Message-State: AOAM532FtmInPvtc7t6IzTMuzDWGr7ibOJXwLSUx+CMN6+PuIOHnlBxm BLRQJr9lEHSOlnY5+dwuVI70BjOMOm5vQ4ELVB381w== X-Google-Smtp-Source: ABdhPJzBuek4ThwGw7LKMg2H3OQNOMTaq1RqGtFnxwre1s0xPWyQLGExZZ0bojDIycqhpJghZtJJ7rUAhAaGkCHK27w= X-Received: by 2002:a05:6902:203:b0:628:7b6f:2845 with SMTP id j3-20020a056902020300b006287b6f2845mr15356927ybs.533.1646806365542; Tue, 08 Mar 2022 22:12:45 -0800 (PST) MIME-Version: 1.0 References: <20220309014705.1265861-1-liupeng256@huawei.com> In-Reply-To: <20220309014705.1265861-1-liupeng256@huawei.com> From: Marco Elver Date: Wed, 9 Mar 2022 07:12:08 +0100 Message-ID: Subject: Re: [PATCH 0/3] kunit: fix a UAF bug and do some optimization To: Peng Liu Cc: brendanhiggins@google.com, glider@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-Server: rspam06 X-Rspamd-Queue-Id: 6ACFDC0012 X-Stat-Signature: od35d54z7u7cjzxj6wo6mz6u1qj9buee Authentication-Results: imf22.hostedemail.com; dkim=pass header.d=google.com header.s=20210112 header.b=aPuBcekG; spf=pass (imf22.hostedemail.com: domain of elver@google.com designates 209.85.219.174 as permitted sender) smtp.mailfrom=elver@google.com; dmarc=pass (policy=reject) header.from=google.com X-Rspam-User: X-HE-Tag: 1646806366-528924 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Wed, 9 Mar 2022 at 02:29, 'Peng Liu' via kasan-dev 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_DYNAMIC_OBJECTS = 65535. Furthermore, some optimization > for kunit tests has been done. Yeah, I've observed this problem before, so thanks for fixing. It's CONFIG_KFENCE_NUM_OBJECTS (not "DYNAMIC") - please fix in all patches. > Peng Liu (3): > kunit: fix UAF when run kfence test case test_gfpzero > kunit: make kunit_test_timeout compatible with comment > kfence: test: try to avoid test_gfpzero trigger rcu_stall > > lib/kunit/try-catch.c | 3 ++- > mm/kfence/kfence_test.c | 3 ++- > 2 files changed, 4 insertions(+), 2 deletions(-) > > -- > 2.18.0.huawei.25 > > -- > You received this message because you are subscribed to the Google Groups "kasan-dev" group. > To unsubscribe from this group and stop receiving emails from it, send an email to kasan-dev+unsubscribe@googlegroups.com. > To view this discussion on the web visit https://groups.google.com/d/msgid/kasan-dev/20220309014705.1265861-1-liupeng256%40huawei.com.