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=-3.7 required=3.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED 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 8991CC4338F for ; Fri, 6 Aug 2021 07:02:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 665D761131 for ; Fri, 6 Aug 2021 07:02:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236751AbhHFHCg (ORCPT ); Fri, 6 Aug 2021 03:02:36 -0400 Received: from mail-il1-f198.google.com ([209.85.166.198]:35691 "EHLO mail-il1-f198.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239210AbhHFHCe (ORCPT ); Fri, 6 Aug 2021 03:02:34 -0400 Received: by mail-il1-f198.google.com with SMTP id v18-20020a056e020f92b02901ff388acf98so4108361ilo.2 for ; Fri, 06 Aug 2021 00:02:19 -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=YOruhbXjknj07TqBsDd0ivPVwgxxq4P/kYOSASbx7Ew=; b=n+tIAdE3q59VsYDK+/rAia72g+PbJA3kwDWeInB6HrPrgKaRxGhjXyWoUesq5hAnC7 4v9PTcnjsiK75g5TSCHvWtaFCnuBLjN13dMehpB6pceK9ZC8WbGCkV7cWbGcai2ZgZID FC/F2Kx1LKfr9/Hiis3EgZF3rLniVQOdsLdDrAWAgvOHiZUQ07oFq+9gayZ7hVCtC4OP mdLWCIgqRjRVgEFwZCTZprF4JX/eU5aT+i5KN6woN0plBBLYdzVI+vwxl96fJWRR9Etp e7qWi9Z7piTcodLg50lp1nPGmJrnCzZ6YIWSvLeCYJv00NHOtz8D1sjK2nNpc7rI1qB9 W1/g== X-Gm-Message-State: AOAM5317eNAB195BTGUCEhR2frZcifXU3ZsyyfRmR2VWaWMKB/NzUUk4 T6doePVzBF1GDFIC0mAC9DsugRBfXJI0oyY8a2lRfpxrkCKp X-Google-Smtp-Source: ABdhPJwswUO3MfN3mtN9XHnSiTVAxxfoMmn5e49ROfk1F6/xPYpe19YzKWLf6TrZX7Om0L9nzSglH0wT1EeozMwF0UeZuO9oJOif MIME-Version: 1.0 X-Received: by 2002:a05:6602:2e8a:: with SMTP id m10mr233364iow.45.1628233339292; Fri, 06 Aug 2021 00:02:19 -0700 (PDT) Date: Fri, 06 Aug 2021 00:02:19 -0700 In-Reply-To: <0000000000005225a605bd97fa64@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000cccfe405c8de9d1c@google.com> Subject: Re: [syzbot] WARNING in io_ring_exit_work From: syzbot To: asml.silence@gmail.com, axboe@kernel.dk, hdanton@sina.com, io-uring@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org syzbot has found a reproducer for the following issue on: HEAD commit: 8d4b477da1a8 Add linux-next specific files for 20210730 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=1478e4fa300000 kernel config: https://syzkaller.appspot.com/x/.config?x=4adf4987f875c210 dashboard link: https://syzkaller.appspot.com/bug?extid=00e15cda746c5bc70e24 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.1 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15d5cd96300000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1798471e300000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+00e15cda746c5bc70e24@syzkaller.appspotmail.com ------------[ cut here ]------------ WARNING: CPU: 1 PID: 1182 at fs/io_uring.c:8802 io_ring_exit_work+0x24e/0x1600 fs/io_uring.c:8802 Modules linked in: CPU: 1 PID: 1182 Comm: kworker/u4:5 Not tainted 5.14.0-rc3-next-20210730-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events_unbound io_ring_exit_work RIP: 0010:io_ring_exit_work+0x24e/0x1600 fs/io_uring.c:8802 Code: 30 11 00 00 48 8b 05 c1 dc 80 09 31 ff 48 8b 2c 24 48 29 c5 48 89 ee e8 c0 a8 95 ff 48 85 ed 0f 89 a8 fe ff ff e8 52 a3 95 ff <0f> 0b e9 9c fe ff ff e8 46 a3 95 ff 48 c7 c2 c0 25 2a 90 48 c7 c6 RSP: 0018:ffffc90004ed7b98 EFLAGS: 00010293 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: ffff88801c921c80 RSI: ffffffff81e014de RDI: 0000000000000003 RBP: ffffffffffffffff R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff81e014d0 R11: 0000000000000000 R12: fffffbfff16c1e30 R13: ffffed100e3f4894 R14: ffff888071fa4920 R15: ffff888071fa4000 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000488 CR3: 00000001c82cf000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: process_one_work+0x98d/0x1630 kernel/workqueue.c:2276 worker_thread+0x658/0x11f0 kernel/workqueue.c:2422 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295