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=-11.4 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 149E3C5517A for ; Wed, 11 Nov 2020 11:13:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A486120795 for ; Wed, 11 Nov 2020 11:13:26 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="LuFMYk0d" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726506AbgKKLNY (ORCPT ); Wed, 11 Nov 2020 06:13:24 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59952 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726495AbgKKLNU (ORCPT ); Wed, 11 Nov 2020 06:13:20 -0500 Received: from mail-qv1-xf43.google.com (mail-qv1-xf43.google.com [IPv6:2607:f8b0:4864:20::f43]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E8279C0613D1 for ; Wed, 11 Nov 2020 03:13:19 -0800 (PST) Received: by mail-qv1-xf43.google.com with SMTP id 63so671668qva.7 for ; Wed, 11 Nov 2020 03:13:19 -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=G25H3cRGlnqgYp9qHwhX1vczcSDgPbi+Ig9bY020mP0=; b=LuFMYk0dUlPR4FVrsNh5uk1umraI3MMg3mRmkuVk63xZv/LMdVaDxOtmuISraXdmiu UKgk7K9acPBkbNd769WbQNAn09tEAJWByf8wi9Mgnl5wFZtywKSQYUfQ66tgAEbq0r0k Rizv5JWEieM46t96h8fnk0/M4EOOEnS9dzd3kd8H79mDZ3OlTmWv97UbsSo+U7OUp5ts AT1fhh+uAxruSeumevEQIRGkKjU+p3qmFrVLRkFzEWFip4RL0bGK7YmBH0+ojSVSVOFr yI+aEuPz4c8ZyDe7ncItC/NQqJ5HyLESYlxYaUMCKbfNTi7fFhNCOi47apfNHoaYVD8G qLSg== 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=G25H3cRGlnqgYp9qHwhX1vczcSDgPbi+Ig9bY020mP0=; b=ZaOi6mrHFErcNhFbF0jaFvTK75NCXueFRyCIwPdiLLBmrJlt0wqXnMqFHly21/NZ5e 2bZ3LxIyUCbUAcbisEsBF8nPtWx8swXjC0+pTj4xh2G3B/AMQpp14JnKzE6paxaFxaTT nmRJdJNJpLhZW9IUt4s8Pr+odp/r8I6RRdIXOK4dG8O3ziw91NDpBSGmQ/VShWGpRAGy Vs5HW1f4KdGXKAGAB7w+hKa6DlaZUsYoo4iLDWGlFOX1QqySSczLWlgogyZ5qQTjW/qg jYmuNzm+xKUhPNkoHllLFYhPvsSI4mkQrvBfXze6hw8FbEHGIu2B3th1fs1t7267xRey xFpw== X-Gm-Message-State: AOAM530B5SI//r7P41pKvhjLJ+kenMG59X7OIcvSpePi5fp0spotkhHZ CE1rstDZxSZbF06EiA9LRWbMAfJgBZ2jDoivU1ZPnA== X-Google-Smtp-Source: ABdhPJyg+2GPaoQR0835u3ehaZDK5bPh7OzIzQ+ehRY2+fCdQNAjE/kWDN0+UK+JeflqywTVYJzDTAQlIzWcj2Yj2r4= X-Received: by 2002:a05:6214:9c4:: with SMTP id dp4mr3755509qvb.44.1605093198973; Wed, 11 Nov 2020 03:13:18 -0800 (PST) MIME-Version: 1.0 References: <0000000000009323e705ae870d48@google.com> <0000000000008dab1205b1208fe6@google.com> In-Reply-To: <0000000000008dab1205b1208fe6@google.com> From: Dmitry Vyukov Date: Wed, 11 Nov 2020 12:13:07 +0100 Message-ID: Subject: Re: KASAN: use-after-free Read in delete_partition To: syzbot Cc: Anant Thazhemadam , Jens Axboe , Bartosz Golaszewski , Dan Williams , dragonjetli@gmail.com, Greg Kroah-Hartman , Christoph Hellwig , hl1998@protonmail.com, Jan Kara , jean-philippe@linaro.org, johannes.thumshirn@wdc.com, jroedel@suse.de, linux-block , linux-kernel-mentees@lists.linuxfoundation.org, LKML , Rafael Wysocki , Saravana Kannan , syzkaller-bugs Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Oct 8, 2020 at 5:38 AM syzbot wrote: > > syzbot suspects this issue was fixed by commit: > > commit 08fc1ab6d748ab1a690fd483f41e2938984ce353 > Author: Christoph Hellwig > Date: Tue Sep 1 09:59:41 2020 +0000 > > block: fix locking in bdev_del_partition > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1259b1e7900000 > start commit: f75aef39 Linux 5.9-rc3 > git tree: upstream > kernel config: https://syzkaller.appspot.com/x/.config?x=3c5f6ce8d5b68299 > dashboard link: https://syzkaller.appspot.com/bug?extid=b8639c8dcb5ec4483d4f > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15c43c79900000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=173dfa1e900000 > > If the result looks correct, please mark the issue as fixed by replying with: > > #syz fix: block: fix locking in bdev_del_partition > > For information about bisection process see: https://goo.gl/tpsmEJ#bisection #syz fix: block: fix locking in bdev_del_partition