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=-8.7 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 B49D7C388F7 for ; Wed, 11 Nov 2020 03:09:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5D97B221F1 for ; Wed, 11 Nov 2020 03:09:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725870AbgKKDJG (ORCPT ); Tue, 10 Nov 2020 22:09:06 -0500 Received: from mail-il1-f199.google.com ([209.85.166.199]:41008 "EHLO mail-il1-f199.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725867AbgKKDJF (ORCPT ); Tue, 10 Nov 2020 22:09:05 -0500 Received: by mail-il1-f199.google.com with SMTP id h4so385354ilj.8 for ; Tue, 10 Nov 2020 19:09:05 -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=wf9hL6Te9sp/yqa+Doc2BxzTapoLp41NMYlihKhsE5U=; b=C0Asr13HzB/QxHzxQYt/yYQZWpI+c8MPAloWhHqNQ7gd0CjROLtQDdxj+Jk+98hxhg pydWdqfQkDeiOzvQIDNvTHZ5LqIjvlTAYwg3qX/uo4+QFO44u0REGgViYEL8GyyoB5Ae Ul2scDxzCgEwoDl8rV994bLh71WPj9nG53LABfDaKuhKZxQ4XU/6VlYoSwjtAt7uNiHu Kjut62LTKeMdJsL2w3efdxRhOYbS8bPsNd43Q3aVtjhdUYI7nEwy31FsCLZyhc3Hnsp6 v73krQFcEubfaRJxl0g0FlsLy/woqQsnFJJpaNJEYdWUtoHSW/mz74pKqp05TLe0InSl Baaw== X-Gm-Message-State: AOAM530Zoo6RyVNypY6flj17YUOMqWc55LyVI3Gu9Fc5wrt09Lob3GQX bUG3cf1VpgoOQ+UHGy1P9FBlD4HTwh4+Ayp3eGnKr94DITR4 X-Google-Smtp-Source: ABdhPJw322s2MJlVk9+t74N1ScoBaJO4J3N8LABAJKKIIvfejPk/tSGh8Y8hRv9pCYKg3l9qjzobyF5QLxxkTWZVc72IPUvFMa5q MIME-Version: 1.0 X-Received: by 2002:a92:ba14:: with SMTP id o20mr17040042ili.76.1605064145162; Tue, 10 Nov 2020 19:09:05 -0800 (PST) Date: Tue, 10 Nov 2020 19:09:05 -0800 In-Reply-To: <000000000000b09d8c059a3240be@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000036d7e005b3cc1e79@google.com> Subject: Re: WARNING in percpu_ref_exit (2) From: syzbot To: axboe@kernel.dk, ebiggers@kernel.org, hdanton@sina.com, io-uring@vger.kernel.org, linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, paulmck@kernel.org, syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org syzbot suspects this issue was fixed by commit: commit c1e2148f8ecb26863b899d402a823dab8e26efd1 Author: Jens Axboe Date: Wed Mar 4 14:25:50 2020 +0000 io_uring: free fixed_file_data after RCU grace period bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=161ea46e500000 start commit: 63849c8f Merge tag 'linux-kselftest-5.6-rc5' of git://git... git tree: upstream kernel config: https://syzkaller.appspot.com/x/.config?x=4527d1e2fb19fd5c dashboard link: https://syzkaller.appspot.com/bug?extid=8c4a14856e657b43487c syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13c30061e00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1251b731e00000 If the result looks correct, please mark the issue as fixed by replying with: #syz fix: io_uring: free fixed_file_data after RCU grace period For information about bisection process see: https://goo.gl/tpsmEJ#bisection