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,URIBL_BLOCKED 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 7A980C43331 for ; Fri, 3 Apr 2020 06:35:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4768D2073B for ; Fri, 3 Apr 2020 06:35:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387544AbgDCGfF (ORCPT ); Fri, 3 Apr 2020 02:35:05 -0400 Received: from mail-io1-f71.google.com ([209.85.166.71]:47766 "EHLO mail-io1-f71.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730550AbgDCGfF (ORCPT ); Fri, 3 Apr 2020 02:35:05 -0400 Received: by mail-io1-f71.google.com with SMTP id c2so5217339iok.14 for ; Thu, 02 Apr 2020 23:35:05 -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=XvuEaZQv34Wl9b97Fox7ORd+MiG4pPZiu4HFMMCz9b8=; b=QkVnxiSL2USxYmcRYbf29vz4AvtAsOewyDpymyYDjjsrtTXbaq+gLwLP8zjKHC7GeC ZsM4TcMt5C3DlQ0glCPf3iLomZWf4Owi7Vd38vgCGKGNoYCdX2PM/QNGpoZ2+7QNAtkm fvlpgL5ICY5a8msxjo3jQmWtdIs+6jT7tRfvPxrXflAmUhIEeRPd+7laX9yick5YwxIv 9FD22c3MAjVUzLeDur/EgGObeH7qcg2Jp/B8i+x/V7G/qY8M39VRjBeWL7EVOthuiPrZ R0F3t9a9n1SuJMHh7B/YtXQfISM4Fk6Y1/CvkY7VKTsYG/2lkkJY9B3dPju+LzGktgvl JlcQ== X-Gm-Message-State: AGi0Pua9O/uMBUOvxTogs+VUlERq0RGZuOH1KHV3Wgh4VqBmIlaPoElW RKvuCEDrk/1UI1L5pyi3t1L59hwXn7z2Idy6Qw2oxXK14xOk X-Google-Smtp-Source: APiQypKgLxYQRiqluE41KROTRCotuILsRHbZsSaEH/+7vCLB93a2aY6B1Ii2FwOvd8Q/As54JAPWEwyCmr2596qDdnICcLdBc2AL MIME-Version: 1.0 X-Received: by 2002:a02:6c8:: with SMTP id 191mr6878565jav.133.1585895704787; Thu, 02 Apr 2020 23:35:04 -0700 (PDT) Date: Thu, 02 Apr 2020 23:35:04 -0700 In-Reply-To: <000000000000f1aa0d05a25cfab6@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000227f0c05a25d1e9e@google.com> Subject: Re: possible deadlock in free_ioctx_users (2) From: syzbot To: adobriyan@gmail.com, akpm@linux-foundation.org, allison@lohutok.net, areber@redhat.com, aubrey.li@linux.intel.com, avagin@gmail.com, bcrl@kvack.org, christian@brauner.io, cyphar@cyphar.com, ebiederm@xmission.com, gregkh@linuxfoundation.org, guro@fb.com, joel@joelfernandes.org, keescook@chromium.org, linmiaohe@huawei.com, linux-aio@kvack.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, mhocko@suse.com, mingo@kernel.org, oleg@redhat.com, peterz@infradead.org, sargun@sargun.me, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, viro@zeniv.linux.org.uk Content-Type: text/plain; charset="UTF-8" Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org syzbot has bisected this bug to: commit 7bc3e6e55acf065500a24621f3b313e7e5998acf Author: Eric W. Biederman Date: Thu Feb 20 00:22:26 2020 +0000 proc: Use a list of inodes to flush from proc bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=164ae51fe00000 start commit: 7be97138 Merge tag 'xfs-5.7-merge-8' of git://git.kernel.o.. git tree: upstream final crash: https://syzkaller.appspot.com/x/report.txt?x=154ae51fe00000 console output: https://syzkaller.appspot.com/x/log.txt?x=114ae51fe00000 kernel config: https://syzkaller.appspot.com/x/.config?x=ec722f9d4eb221d2 dashboard link: https://syzkaller.appspot.com/bug?extid=832aabf700bc3ec920b9 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10f37663e00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16feb91fe00000 Reported-by: syzbot+832aabf700bc3ec920b9@syzkaller.appspotmail.com Fixes: 7bc3e6e55acf ("proc: Use a list of inodes to flush from proc") For information about bisection process see: https://goo.gl/tpsmEJ#bisection