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=-13.2 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_IN_DEF_DKIM_WL 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 0B675C433DB for ; Wed, 27 Jan 2021 19:52:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B736B64DA1 for ; Wed, 27 Jan 2021 19:52:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232239AbhA0Tvo (ORCPT ); Wed, 27 Jan 2021 14:51:44 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57370 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231782AbhA0TvC (ORCPT ); Wed, 27 Jan 2021 14:51:02 -0500 Received: from mail-pf1-x42b.google.com (mail-pf1-x42b.google.com [IPv6:2607:f8b0:4864:20::42b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 71D33C061573 for ; Wed, 27 Jan 2021 11:50:22 -0800 (PST) Received: by mail-pf1-x42b.google.com with SMTP id q131so1890642pfq.10 for ; Wed, 27 Jan 2021 11:50:22 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=c9U/E4NAOZN1zGDJN6ajr3v7PnsrIwJRfTojEiXgDFE=; b=SQcnEZz3e5KTzenB+u2Yw7jys4kDRMmrkJkmIajdVCFcMDZKtQ994n+cLvV77fnkXa 7f7j4qD2ZLp/L5GB7HbBg6SSfbT6botBfxUjzikDsHTxc9fS8G35rTfFbIRFBoohtlhn NXA2WpS7tLdCP/wtitm+LzVd1McGKUwDvYtwhd8GQ3tKA6ZvtAymK710GYAMJcsRHlJh 2rRfRMyuT0ia5m1N3I4gFXC1qHPR1jdVgMnE6sgCocWMUmVU0lZaGB/ud9XPOzlIKRp+ Qiu4qNxMvL8E0aZCbQ3yv5EEHow1s7RIuVb6oBxcMMfJ47pWMz5Y5xVh2yQ4YOcnk4AY gLmg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=c9U/E4NAOZN1zGDJN6ajr3v7PnsrIwJRfTojEiXgDFE=; b=qCxGS/eBU0cBFrWzZgbIv4Z/+kxfAbSEIImEh0QTfZoWXjR0vRxrT4kaRKy5RmF+hr kRqohWFDn4w1/zNZn+SPbo/hxs5deewOtnPETGiEKKNdK41DNaWqsGl6NWTQd0TYmQi2 szouHouqr877bIgWyIHWhGx4WEwzZXzlaOaipAtzB87XNFP157vtU6iugPvIHz+jKeoo hcoq8e+yREPqeLsETiDwMCZXg8AnG1BplxAiSN39dLCLMHckZr/t6z4eqCEm8P9k/FLY HOEdR3lb8RQY9ea1S1GbU6QtR82qmQSbgSVSJkN2C7b+hJ6BLpbUekmtI9nptOpC96vc jhaw== X-Gm-Message-State: AOAM532K2zMOqd3O7NxL/ydxOekPAdUhDiAcfV4tYR+MmtZA5iPzGny/ tIFhsMV9c/Q5Ag5cEnpqDL3AnixB1OX8hHMpuoKvhw== X-Google-Smtp-Source: ABdhPJxoE+wlvrWbJYlFeq+4g3omfEZVNtzrO3gbHcVhRi7GB60xkbsLiTAU6alGBMHRu5EOpVEpHdaSE8VSYx81i7s= X-Received: by 2002:a65:430b:: with SMTP id j11mr12450545pgq.130.1611777021720; Wed, 27 Jan 2021 11:50:21 -0800 (PST) MIME-Version: 1.0 References: <0000000000008d396205b9e4adee@google.com> <20210127174322.GH4387@sirena.org.uk> In-Reply-To: <20210127174322.GH4387@sirena.org.uk> From: Andrey Konovalov Date: Wed, 27 Jan 2021 20:50:10 +0100 Message-ID: Subject: Re: KASAN: invalid-access Read in kmem_cache_destroy To: Dmitry Vyukov Cc: syzbot , Amit Kachhap , Catalin Marinas , Linux ARM , LKML , Mark Rutland , mbenes@suse.cz, syzkaller-bugs , Will Deacon , Vincenzo Frascino , Mark Brown Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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