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=-0.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 B96FCC54FCB for ; Sat, 25 Apr 2020 14:32:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 97D382071E for ; Sat, 25 Apr 2020 14:32:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726142AbgDYOcF (ORCPT ); Sat, 25 Apr 2020 10:32:05 -0400 Received: from mail-il1-f199.google.com ([209.85.166.199]:40414 "EHLO mail-il1-f199.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726050AbgDYOcE (ORCPT ); Sat, 25 Apr 2020 10:32:04 -0400 Received: by mail-il1-f199.google.com with SMTP id k5so13808790ilg.7 for ; Sat, 25 Apr 2020 07:32:03 -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=rmlyaSN6XAcsIU4KSfybtQVJJEftnTSClaEZrW6WcQU=; b=FOziFROJiy78VDyEq4Z02rrOLG/bdMpIEJzYFSds0GHCosxQ4xH9bu3zbkdpdGVyPd rSZkMswJa+oZMDWM7LrxFy+QCQYO4J/G8J83cNYwnJ7hU8tNCq3ysf019dt256V27Nba fqrPv48fJbDZxsMf3B13kSzmAO95usg9/N7n7QCbUYf2P6QEvChJfBTSjEOnT/+ei2J+ RMYlnd/ZBd0/yISD6YQuC7ggFjrPlkzwTrgH0t4WRN3wNy4GDD5FFwju+kAJc9E/Ap6l ilLzKwwP03/31zkwanjdQU9sgGbJeLatn9Ic0NfNbAmgz7pygPSzOxHgIr/2OqHFtsyN LSJw== X-Gm-Message-State: AGi0PuYZ0SUM/8NXSwDp3CbMcwChaqBv9EtLCQYJbR6LvPHMqQ3awZsT DwAPs9lMrxveQV87b+F9R7WTA5QXhxeVe1wC6tPRKmtqUnmk X-Google-Smtp-Source: APiQypI++Mtlx8XClDy5/XNNiu+1H0kUMLFRZD3sWDB4Aa8lzzoEoKOC3FYxwiJ9yXlLAmyYuF2FE58rlTm2ekn/XWhGCsiAbA/k MIME-Version: 1.0 X-Received: by 2002:a92:8499:: with SMTP id y25mr13978461ilk.268.1587825123164; Sat, 25 Apr 2020 07:32:03 -0700 (PDT) Date: Sat, 25 Apr 2020 07:32:03 -0700 In-Reply-To: <0000000000006233e4059aa1dfb6@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000006e8a3e05a41e5813@google.com> Subject: Re: possible deadlock in do_io_accounting (3) From: syzbot To: adobriyan@gmail.com, akpm@linux-foundation.org, avagin@gmail.com, bernd.edlinger@hotmail.de, casey@schaufler-ca.com, christian@brauner.io, ebiederm@xmission.com, kent.overstreet@gmail.com, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, mhocko@suse.com, syzkaller-bugs@googlegroups.com, tglx@linutronix.de Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org syzbot suspects this bug was fixed by commit: commit 76518d3798855242817e8a8ed76b2d72f4415624 Author: Bernd Edlinger Date: Fri Mar 20 20:27:41 2020 +0000 proc: io_accounting: Use new infrastructure to fix deadlocks in execve bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=124347cfe00000 start commit: 46cf053e Linux 5.5-rc3 git tree: upstream kernel config: https://syzkaller.appspot.com/x/.config?x=ed9d672709340e35 dashboard link: https://syzkaller.appspot.com/bug?extid=87a1b40b8fcdc9d40bd0 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15693866e00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12847615e00000 If the result looks correct, please mark the bug fixed by replying with: #syz fix: proc: io_accounting: Use new infrastructure to fix deadlocks in execve For information about bisection process see: https://goo.gl/tpsmEJ#bisection