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=-1.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS autolearn=no 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 855BCC433E1 for ; Mon, 22 Jun 2020 06:29:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5FBD52491E for ; Mon, 22 Jun 2020 06:29:40 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lca.pw header.i=@lca.pw header.b="M03jICB3" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731286AbgFVG3j (ORCPT ); Mon, 22 Jun 2020 02:29:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39236 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731264AbgFVG3i (ORCPT ); Mon, 22 Jun 2020 02:29:38 -0400 Received: from mail-qk1-x743.google.com (mail-qk1-x743.google.com [IPv6:2607:f8b0:4864:20::743]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 03B76C061795 for ; Sun, 21 Jun 2020 23:29:38 -0700 (PDT) Received: by mail-qk1-x743.google.com with SMTP id w1so14539932qkw.5 for ; Sun, 21 Jun 2020 23:29:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=lca.pw; s=google; h=content-transfer-encoding:from:mime-version:subject:date:message-id :references:cc:in-reply-to:to; bh=BxvQQx+Wy1krZ65HicoIC7/eb0GyxDGrmJy22QqCBA0=; b=M03jICB363eoqmJKO7SRs6VbzeWui/1FNicU9CHRcFjolXrAUSsTXmsLebSn+KznZF +qg1WYg3oK3zdZHPyuA/ESjfDIG+RCNdp7JuD7mimhMInBnRzOiTGUWoeH4dGhaga7/C 4iurT5ac7MzQXq8xKJX8qC3Q8JOR8RBWo/RuiGNYPEd+ZWSeFTjtDXRuJoSFgvs9fK6T WSqgixYxYyyeRJ74QdZitfRJe1d8rFJ0ckbVojlOKvbzdYJEHGiKR+srF61LxoZLxtNu Hwwj2RbGXBW5pvc6xmWVRxUZR9uovpp+KZ3PqRwQaXX9egp7jkKcrAXXIT4rOrGjVRWA qmpA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:content-transfer-encoding:from:mime-version :subject:date:message-id:references:cc:in-reply-to:to; bh=BxvQQx+Wy1krZ65HicoIC7/eb0GyxDGrmJy22QqCBA0=; b=Tt6fGfKbzEzgFsllkWnbsNOI1TAcJlY42+O2sgR05leoaIrHXozqCB/D18CayFM74u 6PQT8/Uj4/8eywZJgBeakEZEDBV5p5fdz4guYvuln5Oue4EZbP5uvpyhSjR3HpZmZXPm +owAfnF59d3j86ybeNfTjVARcw5+Q3TlZeQQKJZmOxdfUxgUiCLSbHa1qvxJMMOaWNtE 03nnitGGL8JWuweYB6kjkZ8SYi5HTw3Zv7nxfOGoOo49zMnHKynTQCg83tNnhkbFOsZK /+20kB1gt1LnJ3eszO6iucp9q7467IgtmYWsZuWGQKw21LnOBc5LqrAn0rPGzTpA0Bbe KZ9A== X-Gm-Message-State: AOAM531aQNX/4tT5Hte3YeIVNZYE2lEQyRJZBvN1xqsQQRyVyVJknOrw 9PEstgcandw8F93ncOUDJo9k8A== X-Google-Smtp-Source: ABdhPJwUojk4T47kPFkLOHYRZhssHDuQcnpEx0Vt6cKmSFoNT8fTpSVALdMBi7q/kStIMb6uHlvEpw== X-Received: by 2002:a37:c0f:: with SMTP id 15mr621940qkm.427.1592807377208; Sun, 21 Jun 2020 23:29:37 -0700 (PDT) Received: from [192.168.1.183] (pool-71-184-117-43.bstnma.fios.verizon.net. [71.184.117.43]) by smtp.gmail.com with ESMTPSA id s42sm14692579qtk.14.2020.06.21.23.29.36 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 21 Jun 2020 23:29:36 -0700 (PDT) Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable From: Qian Cai Mime-Version: 1.0 (1.0) Subject: Re: linux-next boot error: WARNING in kmem_cache_free Date: Mon, 22 Jun 2020 02:29:35 -0400 Message-Id: <4A35E92B-9DEF-4833-81DD-0C6FA50EB174@lca.pw> References: <000000000000617f9d05a8a5a2c4@google.com> Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-next@vger.kernel.org, sfr@canb.auug.org.au, syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk In-Reply-To: <000000000000617f9d05a8a5a2c4@google.com> To: syzbot X-Mailer: iPhone Mail (17F80) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > On Jun 22, 2020, at 1:37 AM, syzbot wrote: >=20 > WARNING: CPU: 0 PID: 0 at mm/slab.h:232 kmem_cache_free+0x0/0x200 mm/slab.= c:2262 Is there any particular reason to use CONFIG_SLAB rather than CONFIG_SLUB? You are really asking for trouble to test something that almost nobody is ex= ercising that code path very well nowadays. Anyway, there is a patchset in -mm that might well introduce this regression= that we could go to confirm it, but I kind of don=E2=80=99t want to spend t= oo much time on SLAB that suppose to be obsolete eventually.=