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 B231DC433E0 for ; Sat, 4 Jul 2020 23:22:17 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 4FB2620826 for ; Sat, 4 Jul 2020 23:22:17 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4FB2620826 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 90AC68D0016; Sat, 4 Jul 2020 19:22:16 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 8948F8D0005; Sat, 4 Jul 2020 19:22:16 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 75C218D0016; Sat, 4 Jul 2020 19:22:16 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0195.hostedemail.com [216.40.44.195]) by kanga.kvack.org (Postfix) with ESMTP id 5D4AD8D0005 for ; Sat, 4 Jul 2020 19:22:16 -0400 (EDT) Received: from smtpin09.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id C9C011EE6 for ; Sat, 4 Jul 2020 23:22:15 +0000 (UTC) X-FDA: 77001969030.09.noise02_560b52126e9e Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin09.hostedemail.com (Postfix) with ESMTP id A998D180AD801 for ; Sat, 4 Jul 2020 23:22:15 +0000 (UTC) X-HE-Tag: noise02_560b52126e9e X-Filterd-Recvd-Size: 8818 Received: from mail-il1-f199.google.com (mail-il1-f199.google.com [209.85.166.199]) by imf03.hostedemail.com (Postfix) with ESMTP for ; Sat, 4 Jul 2020 23:22:15 +0000 (UTC) Received: by mail-il1-f199.google.com with SMTP id o17so17081278ilt.19 for ; Sat, 04 Jul 2020 16:22:15 -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=p/sj6/A1h/oMfABdmzJUOldo2DwRLfpIf9LDXwypp7g=; b=ahXtpNBFh2R8RCgx2rjgt3PmIAFbkgEtvbWH0VLRXRkbW3wyU6vL3N3oZGzWb7mm2P vnXxoV83l1ZdankgjFNDq5kzO7NOiboh6GMUcMIrkVPuyASKSp2fLh+saKvVWCKSredK lcMaasM+8JkWaOt9+9bWDmd3DwkXdgLV3+jTEwBx302hOosc9D3anJYT/yVFkGsujTMF SI4KHF0Ag5nPNHCru/besa8Qu0lKwNP7zuaJqOUuTmsnFeEfIiJ104yaJCrAnWlfFJan gExp0TEyYvB7Lj1o2oWIJJDdaTS7jtcpguUz1jmKosVzudxNwd6Fa6QxRGnAVYRohzSW B4Iw== X-Gm-Message-State: AOAM531CZr8KGeL4gWRoI399m8+p17nw5isb2z4hAqU/NH0lyRe7h5Qp Pm7pCWLqd/h4vkiq7l4d93c2XsBGeKKo8F16k0UYLS53sOUD X-Google-Smtp-Source: ABdhPJwOY9VsonF16dUne23woyWtFLgiGJ5rIS0toAM0k0AJN47MQXHGwL5NQrhbbHUmu2kAupwb2S74YZPjxycIQQNkU+4DgmO2 MIME-Version: 1.0 X-Received: by 2002:a02:ce9a:: with SMTP id y26mr14136365jaq.121.1593904934700; Sat, 04 Jul 2020 16:22:14 -0700 (PDT) Date: Sat, 04 Jul 2020 16:22:14 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000704c7705a9a5e938@google.com> Subject: INFO: task hung in lru_add_drain_all From: syzbot To: akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" X-Rspamd-Queue-Id: A998D180AD801 X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam02 X-Bogosity: Ham, tests=bogofilter, spamicity=0.305210, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Hello, syzbot found the following crash on: HEAD commit: c28e58ee Add linux-next specific files for 20200629 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=1400ab37100000 kernel config: https://syzkaller.appspot.com/x/.config?x=dcd26bbca17dd1db dashboard link: https://syzkaller.appspot.com/bug?extid=1053252c4289b5f73548 compiler: gcc (GCC) 10.1.0-syz 20200507 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11c75c83100000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=11fd99e3100000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+1053252c4289b5f73548@syzkaller.appspotmail.com INFO: task khugepaged:1160 blocked for more than 143 seconds. Not tainted 5.8.0-rc3-next-20200629-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. khugepaged D28584 1160 2 0x00004000 Call Trace: context_switch kernel/sched/core.c:3445 [inline] __schedule+0x8b4/0x1e80 kernel/sched/core.c:4169 schedule+0xd0/0x2a0 kernel/sched/core.c:4244 schedule_timeout+0x1d8/0x250 kernel/time/timer.c:1873 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x163/0x260 kernel/sched/completion.c:138 __flush_work+0x51f/0xab0 kernel/workqueue.c:3046 lru_add_drain_all+0x3ca/0x590 mm/swap.c:808 khugepaged_do_scan mm/khugepaged.c:2177 [inline] khugepaged+0x10b/0x5a10 mm/khugepaged.c:2238 kthread+0x3b5/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Showing all locks held in the system: 6 locks held by kworker/0:0/5: 1 lock held by khungtaskd/1150: #0: ffffffff89bc3000 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:5779 1 lock held by khugepaged/1160: #0: ffffffff89c48448 (lock#4){+.+.}-{3:3}, at: lru_add_drain_all+0x59/0x590 mm/swap.c:779 1 lock held by in:imklog/6654: #0: ffff8880935425f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:928 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1150 Comm: khungtaskd Not tainted 5.8.0-rc3-next-20200629-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x18f/0x20d lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x70/0xb1 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1b3/0x223 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:147 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:253 [inline] watchdog+0xd89/0xf30 kernel/hung_task.c:339 kthread+0x3b5/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 5 Comm: kworker/0:0 Not tainted 5.8.0-rc3-next-20200629-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: usb_hub_wq hub_event RIP: 0010:hid_apply_multiplier drivers/hid/hid-core.c:1106 [inline] RIP: 0010:hid_setup_resolution_multiplier+0x3a3/0x9b0 drivers/hid/hid-core.c:1163 Code: b6 14 38 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 df 04 00 00 45 8b 74 24 04 bf 02 00 00 00 44 89 f6 e8 6d 62 90 fb <41> 83 fe 02 0f 85 74 ff ff ff 4c 89 24 24 e8 da 65 90 fb 49 8d 7d RSP: 0018:ffffc90000cbec18 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff85e38373 RDX: 0000000000000000 RSI: ffff8880a9598140 RDI: 0000000000000005 RBP: ffff88809f43e800 R08: 0000000000000001 R09: ffffc900015ee0cc R10: 0000000000000002 R11: 0000000000000000 R12: ffff88809f43e800 R13: ffff888085800000 R14: 0000000000000000 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055726aabf328 CR3: 00000000a0102000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: hid_open_report+0x438/0x640 drivers/hid/hid-core.c:1274 hid_parse include/linux/hid.h:1017 [inline] ms_probe+0x12d/0x4b0 drivers/hid/hid-microsoft.c:388 hid_device_probe+0x2bd/0x3f0 drivers/hid/hid-core.c:2263 really_probe+0x282/0x8a0 drivers/base/dd.c:525 driver_probe_device+0xfe/0x1d0 drivers/base/dd.c:701 __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:807 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:431 __device_attach+0x28d/0x3f0 drivers/base/dd.c:873 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:491 device_add+0xacf/0x1b00 drivers/base/core.c:2680 hid_add_device+0x344/0x9b0 drivers/hid/hid-core.c:2419 usbhid_probe+0xac8/0xff0 drivers/hid/usbhid/hid-core.c:1412 usb_probe_interface+0x2f7/0x780 drivers/usb/core/driver.c:374 really_probe+0x282/0x8a0 drivers/base/dd.c:525 driver_probe_device+0xfe/0x1d0 drivers/base/dd.c:701 __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:807 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:431 __device_attach+0x28d/0x3f0 drivers/base/dd.c:873 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:491 device_add+0xacf/0x1b00 drivers/base/core.c:2680 usb_set_configuration+0xef6/0x17a0 drivers/usb/core/message.c:2032 usb_generic_driver_probe+0xba/0xf2 drivers/usb/core/generic.c:241 usb_probe_device+0xc6/0x210 drivers/usb/core/driver.c:272 really_probe+0x282/0x8a0 drivers/base/dd.c:525 driver_probe_device+0xfe/0x1d0 drivers/base/dd.c:701 __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:807 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:431 __device_attach+0x28d/0x3f0 drivers/base/dd.c:873 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:491 device_add+0xacf/0x1b00 drivers/base/core.c:2680 usb_new_device.cold+0x748/0x103b drivers/usb/core/hub.c:2554 hub_port_connect drivers/usb/core/hub.c:5208 [inline] hub_port_connect_change drivers/usb/core/hub.c:5348 [inline] port_event drivers/usb/core/hub.c:5494 [inline] hub_event+0x2033/0x3e40 drivers/usb/core/hub.c:5576 process_one_work+0x94c/0x1670 kernel/workqueue.c:2269 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415 kthread+0x3b5/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 0.000 msecs --- This bug 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 bug report. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches