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=-5.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS autolearn=unavailable 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 62941C432C0 for ; Sat, 23 Nov 2019 02:27:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 329CE2071C for ; Sat, 23 Nov 2019 02:27:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726736AbfKWC1C (ORCPT ); Fri, 22 Nov 2019 21:27:02 -0500 Received: from mail-il1-f197.google.com ([209.85.166.197]:50363 "EHLO mail-il1-f197.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726401AbfKWC1B (ORCPT ); Fri, 22 Nov 2019 21:27:01 -0500 Received: by mail-il1-f197.google.com with SMTP id l63so7898502ili.17 for ; Fri, 22 Nov 2019 18:27:01 -0800 (PST) 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=AXD7gA5IclP9MlEfBt3hOECjOVr1z7Xrb3xxCpv2mBI=; b=M4XNTskJo6V3kiz+P15Mp2jz1DkIQqjd55R7GNWsMzio9wDeK4hvTWjP0/ehESTiXK 50HhKHreyh0ojS0+XYZJYpOfrCSW+jcg0sk2TyinmVeyN1aNS8e2Z+akRiRYFXtnRMgK +13vaZiLs4fd2AZdbCT8oMGu41gq2JhKPrSkdDoo0NnM3tZfMYF0o0y7NjUZ1P7jl1eW n8cgreJgAx7klhnang5zco2zFXAjvCr6XRBYDG2Jt3XrqgL3DNZVSCODR3A5sxWJPbnX TTRCLkghCrKNlz6LKVuxXbSXIGhtCsfgd+eaS7fNORcTP319mXOclBbUW5/uiMwQuBol h4Aw== X-Gm-Message-State: APjAAAV95rFPNplDCiGooGzCEXJmInBAFoMGh7rGWbLMouok6SVy63VW vZSxvecmMcYHz2Arfb3ftgJOOj6lDTrwkdeqx/zzCjCzqjbm X-Google-Smtp-Source: APXvYqw+zwi8wEAChrZq2ZVReXjmVskvTdckaXjZ2KbBA0nnhxgLvaWwwG2piW1E9CjkkowM30p50xw7NE0F2nHtTiaknnYm/gUD MIME-Version: 1.0 X-Received: by 2002:a92:bb95:: with SMTP id x21mr20040816ilk.128.1574476020687; Fri, 22 Nov 2019 18:27:00 -0800 (PST) Date: Fri, 22 Nov 2019 18:27:00 -0800 In-Reply-To: <000000000000d03eea0571adfe83@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000ebac4d0597fa4340@google.com> Subject: Re: possible deadlock in mnt_want_write From: syzbot To: amir73il@gmail.com, ast@kernel.org, dvyukov@google.com, linux-fsdevel@vger.kernel.org, linux-integrity@vger.kernel.org, linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, mszeredi@redhat.com, rgoldwyn@suse.de, syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk, zohar@linux.ibm.com, zohar@linux.vnet.ibm.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org syzbot has bisected this bug to: commit 8e54cadab447dae779f80f79c87cbeaea9594f60 Author: Al Viro Date: Sun Nov 27 01:05:42 2016 +0000 fix default_file_splice_read() bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=15147a36e00000 start commit: 6d906f99 Merge tag 'arm64-fixes' of git://git.kernel.org/p.. git tree: upstream final crash: https://syzkaller.appspot.com/x/report.txt?x=17147a36e00000 console output: https://syzkaller.appspot.com/x/log.txt?x=13147a36e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=856fc6d0fbbeede9 dashboard link: https://syzkaller.appspot.com/bug?extid=ae82084b07d0297e566b syz repro: https://syzkaller.appspot.com/x/repro.syz?x=111767b7200000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1611ab2d200000 Reported-by: syzbot+ae82084b07d0297e566b@syzkaller.appspotmail.com Fixes: 8e54cadab447 ("fix default_file_splice_read()") For information about bisection process see: https://goo.gl/tpsmEJ#bisection