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=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 251EAC5517A for ; Sun, 25 Oct 2020 01:37:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D5A8E20754 for ; Sun, 25 Oct 2020 01:37:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1766626AbgJYBhd (ORCPT ); Sat, 24 Oct 2020 21:37:33 -0400 Received: from mail-io1-f71.google.com ([209.85.166.71]:47505 "EHLO mail-io1-f71.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1766623AbgJYBhd (ORCPT ); Sat, 24 Oct 2020 21:37:33 -0400 Received: by mail-io1-f71.google.com with SMTP id d19so3547910iod.14 for ; Sat, 24 Oct 2020 18:37:25 -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:message-id:subject:from:to; bh=f7Hsyz4XtmVh+a7GNuOGhl5IPZeTTe87Hi0sltQL6Wk=; b=PPcsJe6vlXsN6lC2JXW85+KejcBkBQcme6WfEst5ncZrPe7k+v6nt1SUpq1PhFOLxW E0HnEEN0d3If/HUPh4ewLTQhhZzs0vGqil0EhRo7IZWSkbnPIWR2dRNHE8grfB4H2Du2 n0U0FnECu2VBJ4ERsZP02iB6siZoGYkks0y0itRZsqvOgRpPwxoNEiF63731tRk1kJIC h0rmdQuzIkZL96rncJeF8l0YDVpVEqVfmz9UgsGFApSg9Y1NUv4EX9J69RqbHgwFMPvh 9BVlvOvUFyGzNNQUYI2x00ZciwhBADrkho1w46R+bA1hs9FdahjfSXEv7CeEakAAKobV h20Q== X-Gm-Message-State: AOAM530WLgQQsqmAtxT8E3iWANMbYvoDAB5EMDZ2uMSQJsMOR66apscm O2PurmBBrt9GJokSAOL+ODsRr/5tPRwCEzyI0A2I6DjEM3F0 X-Google-Smtp-Source: ABdhPJyVqg3CpdLKaBi8gq4rMXQsBc6w938eGBu6UJQVXU17DGoTxdyPCZy7R5qxV0ZH/L967mOIrRscgffuQhxSPmf7snKR2+3l MIME-Version: 1.0 X-Received: by 2002:a05:6602:2436:: with SMTP id g22mr6197592iob.79.1603589844811; Sat, 24 Oct 2020 18:37:24 -0700 (PDT) Date: Sat, 24 Oct 2020 18:37:24 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000010c66805b274dbd7@google.com> Subject: WARNING in try_to_wake_up From: syzbot To: axboe@kernel.dk, io-uring@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.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: linux-fsdevel@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: d7691390 Merge tag 'block-5.10-2020-10-24' of git://git.ke.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=161d04b0500000 kernel config: https://syzkaller.appspot.com/x/.config?x=65e86ae741289c65 dashboard link: https://syzkaller.appspot.com/bug?extid=dd74984384afdb86e904 compiler: gcc (GCC) 10.1.0-syz 20200507 Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+dd74984384afdb86e904@syzkaller.appspotmail.com ------------[ cut here ]------------ WARNING: CPU: 2 PID: 19299 at include/linux/cpumask.h:137 ttwu_stat include/linux/rcupdate.h:779 [inline] WARNING: CPU: 2 PID: 19299 at include/linux/cpumask.h:137 try_to_wake_up+0xd5e/0x1300 kernel/sched/core.c:2979 Modules linked in: CPU: 2 PID: 19299 Comm: io_wq_manager Not tainted 5.9.0-syzkaller #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014 RIP: 0010:cpu_max_bits_warn include/linux/cpumask.h:137 [inline] RIP: 0010:cpumask_check include/linux/cpumask.h:144 [inline] RIP: 0010:cpumask_check include/linux/cpumask.h:142 [inline] RIP: 0010:cpumask_test_cpu include/linux/cpumask.h:367 [inline] RIP: 0010:is_cpu_allowed kernel/sched/core.c:1705 [inline] RIP: 0010:select_task_rq kernel/sched/core.c:2370 [inline] RIP: 0010:try_to_wake_up+0xd5e/0x1300 kernel/sched/core.c:2964 Code: 70 02 00 00 65 ff 0d d1 97 b5 7e 4c 8d 75 40 0f 85 da f8 ff ff e8 61 ed b3 ff e9 d0 f8 ff ff 41 bd 01 00 00 00 e9 6e f3 ff ff <0f> 0b e9 2d f6 ff ff 48 8d bd 98 01 00 00 48 b8 00 00 00 00 00 fc RSP: 0018:ffffc900014b7d50 EFLAGS: 00010002 RAX: dffffc0000000000 RBX: 1ffff92000296faf RCX: ffff88805e6e1330 RDX: 1ffff1100bcdc265 RSI: ffffffff83b4fecb RDI: 0000000000000006 RBP: ffff88805e6e0fc0 R08: 0000000000000008 R09: ffffffff8cecd34f R10: 0000000000000040 R11: 0000000000000000 R12: 0000000000000206 R13: ffff88805e6e17f0 R14: ffff88805e6e1000 R15: ffff88805e6e1328 FS: 0000000000000000(0000) GS:ffff88802cc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000b60004 CR3: 0000000067ffb000 CR4: 0000000000350ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: create_io_worker+0x590/0x8d0 fs/io-wq.c:716 io_wq_manager+0x16b/0xb80 fs/io-wq.c:781 kthread+0x3af/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.