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=-9.0 required=3.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham 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 0CE1CC433E2 for ; Mon, 31 Aug 2020 20:29:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DF67F2087D for ; Mon, 31 Aug 2020 20:29:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728327AbgHaU3I (ORCPT ); Mon, 31 Aug 2020 16:29:08 -0400 Received: from mail-il1-f197.google.com ([209.85.166.197]:35517 "EHLO mail-il1-f197.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728301AbgHaU3H (ORCPT ); Mon, 31 Aug 2020 16:29:07 -0400 Received: by mail-il1-f197.google.com with SMTP id p16so2928715ilp.2 for ; Mon, 31 Aug 2020 13:29:07 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:in-reply-to:message-id:subject :from:to; bh=gnKsjgJ5rv+iBjKke+34Do0zneKwGI7SNQuffWwXV30=; b=saTxHdnXRScCcz8kXS49FAGQW/SUIGqWkyq3lHjXZ/16nPxPF36jMVEx1rLYv25OGk oheLhzMkCceS3hoW1l/orlYKtYSxfWeOedaXY6jvK5DIO9D0JdimkFgnFQ5FZOLBdptJ 9deOwlofnXLcgM/k+dS6A1lcPcN2SRC8b1sPltVy8pT8MceJ2r9S4xXk6vLwwa8FCOTi 4D6oOOp+cprDJJkspOJ1ZAC2g2nXC4x5ojfZsN3bpOB4UI8zZjBgztzNBV/ngG0+mmpK FZvKQUsKGAvxgHHz42PXRtIdoGIhA0RunFx8vmXUpfGESvN6HiZ/TaX7WYpf7aevtbI1 vxmg== X-Gm-Message-State: AOAM532R/DTfZo67PUyBjwQu6K7efD9rzrmQPjR3s0ZYQNxhJ+S65ZGf U/LVxSZhsdlXGiOKLahRYOJjSk7rWAdqCPreoxcMCo4+RClj X-Google-Smtp-Source: ABdhPJwCvxBZTJEsf7HAcCNqGtxUArlv0LeJO8NfG5NM0O/U5K34R5yLEbt3NyLxslkp5VsQxwdtrntanuYjj9jwxim2j2G3q909 MIME-Version: 1.0 X-Received: by 2002:a05:6602:2b13:: with SMTP id p19mr2800611iov.30.1598905747341; Mon, 31 Aug 2020 13:29:07 -0700 (PDT) Date: Mon, 31 Aug 2020 13:29:07 -0700 In-Reply-To: <000000000000520ffc05ae2f4fee@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000001985dc05ae32417b@google.com> Subject: Re: KASAN: use-after-free Read in bdev_del_partition From: syzbot To: axboe@kernel.dk, hch@lst.de, jack@suse.cz, johannes.thumshirn@wdc.com, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org syzbot has bisected this issue to: commit cddae808aeb77e5c29d22a8e0dfbdaed413f9e04 Author: Christoph Hellwig Date: Tue Apr 14 07:28:54 2020 +0000 block: pass a hd_struct to delete_partition bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=17fa7656900000 start commit: dcc5c6f0 Merge tag 'x86-urgent-2020-08-30' of git://git.ke.. git tree: upstream final oops: https://syzkaller.appspot.com/x/report.txt?x=14067656900000 console output: https://syzkaller.appspot.com/x/log.txt?x=10067656900000 kernel config: https://syzkaller.appspot.com/x/.config?x=891ca5711a9f1650 dashboard link: https://syzkaller.appspot.com/bug?extid=6448f3c229bc52b82f69 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=154e2285900000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16f6e915900000 Reported-by: syzbot+6448f3c229bc52b82f69@syzkaller.appspotmail.com Fixes: cddae808aeb7 ("block: pass a hd_struct to delete_partition") For information about bisection process see: https://goo.gl/tpsmEJ#bisection