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=-5.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 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 9502EC433DB for ; Thu, 28 Jan 2021 13:26:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3FB2964DD9 for ; Thu, 28 Jan 2021 13:26:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231797AbhA1N0T (ORCPT ); Thu, 28 Jan 2021 08:26:19 -0500 Received: from foss.arm.com ([217.140.110.172]:59068 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231383AbhA1N0R (ORCPT ); Thu, 28 Jan 2021 08:26:17 -0500 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 2AF8413A1; Thu, 28 Jan 2021 05:25:31 -0800 (PST) Received: from [10.37.12.15] (unknown [10.37.12.15]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id B58E73F719; Thu, 28 Jan 2021 05:25:28 -0800 (PST) Subject: Re: KASAN: invalid-access Read in kmem_cache_destroy To: Dmitry Vyukov Cc: Andrey Konovalov , syzbot , Amit Kachhap , Catalin Marinas , Linux ARM , LKML , Mark Rutland , mbenes@suse.cz, syzkaller-bugs , Will Deacon , Mark Brown References: <0000000000008d396205b9e4adee@google.com> <20210127174322.GH4387@sirena.org.uk> From: Vincenzo Frascino Message-ID: Date: Thu, 28 Jan 2021 13:29:23 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 1/28/21 12:43 PM, Dmitry Vyukov wrote: > On Thu, Jan 28, 2021 at 1:30 PM Vincenzo Frascino > wrote: >> >> On 1/27/21 7:50 PM, Andrey Konovalov wrote: >>> On Wed, Jan 27, 2021 at 6:44 PM Mark Brown wrote: >>>> >>>> On Wed, Jan 27, 2021 at 06:14:13PM +0100, Dmitry Vyukov wrote: >>>>> On Wed, Jan 27, 2021 at 5:58 PM syzbot >>>>> wrote: >>>>>> >>>>>> Hello, >>>>>> >>>>>> syzbot found the following issue on: >>>>>> >>>>>> HEAD commit: 2ab38c17 mailmap: remove the "repo-abbrev" comment >>>>>> git tree: upstream >>>>>> console output: https://syzkaller.appspot.com/x/log.txt?x=12eb4ad8d00000 >>>>>> kernel config: https://syzkaller.appspot.com/x/.config?x=ad43be24faf1194c >>>>>> dashboard link: https://syzkaller.appspot.com/bug?extid=2a52b6c31dbefb1e9d9f >>>>>> userspace arch: arm64 >>>>>> >>>>>> Unfortunately, I don't have any reproducer for this issue yet. >>>>>> >>>>>> IMPORTANT: if you fix the issue, please add the following tag to the commit: >>>>>> Reported-by: syzbot+2a52b6c31dbefb1e9d9f@syzkaller.appspotmail.com >>>>> >>>>> This happens on arm64 instance with MTE enabled. >>>>> I don't see any corresponding reports on x86_64. So I would assume >>>>> it's a generic latent bug, or probably more likely a bug in MTE >>>>> support. >>>> >>>> Copying in Vincenso who's done a bunch of MTE stuff recently. >>> >>> Could be the same issue as: >>> >>> https://lkml.org/lkml/2021/1/27/1109 >>> >> >> I had a look at the trace and I agree with Andrey it seems the same issue. > > > #syz fix: Revert "mm/slub: fix a memory leak in sysfs_slab_add()" > Thanks for the confirmation. -- Regards, Vincenzo