I have the same problem with a Dell PowerEdge R210 II, with Dell DRAC under Ubuntu Server 14.04 LTS and 3.13 kernel: Process khubd will block in state D too. => need to do a hard reboot
Screenshot of htop: https://lafibre.info/serveur-linux/load- average/msg372058/#msg372058 The "dmesg" data corresponding ; [11273834.551052] type=1400 audit(1473524094.532:28): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="/sbin/dhclient" pid=22297 comm="apparmor_parser" [11273834.551236] type=1400 audit(1473524094.532:29): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="/usr/lib/NetworkManager/nm-dhcp-client.action" pid=22297 comm="apparmor_parser" [11273834.551388] type=1400 audit(1473524094.532:30): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="/usr/lib/connman/scripts/dhclient-script" pid=22297 comm="apparmor_parser" [11359185.861753] usb 1-1.1: reset full-speed USB device number 3 using ehci-pci [11359190.938076] usb 1-1.1: device descriptor read/64, error -32 [11359191.114227] usb 1-1.1: device descriptor read/64, error -32 [11359191.290375] usb 1-1.1: reset full-speed USB device number 3 using ehci-pci [11359191.362427] usb 1-1.1: device descriptor read/64, error -32 [11359191.538586] usb 1-1.1: device descriptor read/64, error -32 [11359191.714748] usb 1-1.1: reset full-speed USB device number 3 using ehci-pci [11359192.123084] usb 1-1.1: device not accepting address 3, error -32 [11359192.195140] usb 1-1.1: reset full-speed USB device number 3 using ehci-pci [11359192.603502] usb 1-1.1: device not accepting address 3, error -32 [11359192.604316] usb 1-1.1: USB disconnect, device number 3 [11359384.590873] INFO: task khubd:71 blocked for more than 120 seconds. [11359384.591241] Not tainted 3.13.0-85-generic #129-Ubuntu [11359384.591574] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [11359384.592047] khubd D ffff88043fc93180 0 71 2 0x00000000 [11359384.592052] ffff880428cd7c80 0000000000000046 ffff8804293d6000 ffff880428cd7fd8 [11359384.592057] 0000000000013180 0000000000013180 ffff8804293d6000 ffff880428c290e8 [11359384.592061] ffff880428c290ec ffff8804293d6000 00000000ffffffff ffff880428c290f0 [11359384.592065] Call Trace: [11359384.592074] [<ffffffff81730089>] schedule_preempt_disabled+0x29/0x70 [11359384.592078] [<ffffffff81731ef5>] __mutex_lock_slowpath+0x135/0x1b0 [11359384.592082] [<ffffffff81731f8f>] mutex_lock+0x1f/0x2f [11359384.592088] [<ffffffff81545c04>] usb_disconnect+0x64/0x200 [11359384.592091] [<ffffffff815487d3>] hub_port_connect_change+0xd3/0xb20 [11359384.592096] [<ffffffff8154333d>] ? hub_port_status+0xdd/0x120 [11359384.592099] [<ffffffff815496f4>] hub_events+0x4d4/0xa20 [11359384.592102] [<ffffffff81549c75>] hub_thread+0x35/0x160 [11359384.592106] [<ffffffff810add60>] ? prepare_to_wait_event+0x100/0x100 [11359384.592109] [<ffffffff81549c40>] ? hub_events+0xa20/0xa20 [11359384.592113] [<ffffffff8108deb2>] kthread+0xd2/0xf0 [11359384.592117] [<ffffffff8108dde0>] ? kthread_create_on_node+0x1c0/0x1c0 [11359384.592121] [<ffffffff8173c2e8>] ret_from_fork+0x58/0x90 [11359384.592125] [<ffffffff8108dde0>] ? kthread_create_on_node+0x1c0/0x1c0 [11359384.592133] INFO: task kworker/4:2:18579 blocked for more than 120 seconds. [11359384.592544] Not tainted 3.13.0-85-generic #129-Ubuntu [11359384.592869] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [11359384.593321] kworker/4:2 D ffff88043fd13180 0 18579 2 0x00000000 [11359384.593336] Workqueue: events hid_reset [usbhid] [11359384.593338] ffff8803f27af850 0000000000000046 ffff8800badb9800 ffff8803f27affd8 [11359384.593341] 0000000000013180 0000000000013180 ffff8800badb9800 ffff8803f27af998 [11359384.593345] ffff8803f27af9a0 7fffffffffffffff ffff8800badb9800 ffff8800badb9800 [11359384.593348] Call Trace: [11359384.593352] [<ffffffff8172fb69>] schedule+0x29/0x70 [11359384.593355] [<ffffffff8172ed89>] schedule_timeout+0x279/0x320 [11359384.593359] [<ffffffff810a1988>] ? __enqueue_entity+0x78/0x80 [11359384.593364] [<ffffffff810a7dbd>] ? enqueue_entity+0x2ad/0xc00 [11359384.593367] [<ffffffff81730686>] wait_for_completion+0xa6/0x160 [11359384.593372] [<ffffffff8109d570>] ? wake_up_state+0x20/0x20 [11359384.593377] [<ffffffff8108748d>] flush_work+0xed/0x1b0 [11359384.593381] [<ffffffff810836a0>] ? wake_up_worker+0x30/0x30 [11359384.593385] [<ffffffff81087652>] __cancel_work_timer+0x92/0x1a0 [11359384.593390] [<ffffffff81076cfb>] ? lock_timer_base.isra.35+0x2b/0x50 [11359384.593394] [<ffffffff81087770>] cancel_work_sync+0x10/0x20 [11359384.593400] [<ffffffffa00265dc>] usbhid_close+0xbc/0x100 [usbhid] [11359384.593407] [<ffffffffa00771e2>] hidinput_close+0x22/0x30 [hid] [11359384.593412] [<ffffffff8159287a>] input_close_device+0x4a/0x70 [11359384.593417] [<ffffffff815986ff>] evdev_cleanup+0xbf/0xd0 [11359384.593421] [<ffffffff8159873b>] evdev_disconnect+0x2b/0x60 [11359384.593425] [<ffffffff81594e85>] __input_unregister_device+0xc5/0x1b0 [11359384.593429] [<ffffffff8159501d>] input_unregister_device+0x4d/0x80 [11359384.593436] [<ffffffffa0077386>] hidinput_disconnect+0x96/0xc0 [hid] [11359384.593442] [<ffffffffa0073e70>] hid_disconnect+0x60/0x70 [hid] [11359384.593447] [<ffffffffa0073f3d>] hid_device_remove+0xbd/0xd0 [hid] [11359384.593453] [<ffffffff8149f08f>] __device_release_driver+0x7f/0xf0 [11359384.593457] [<ffffffff8149f123>] device_release_driver+0x23/0x30 [11359384.593461] [<ffffffff8149e9a8>] bus_remove_device+0x108/0x180 [11359384.593464] [<ffffffff8149b439>] device_del+0x129/0x1c0 [11359384.593470] [<ffffffffa0073fd7>] hid_destroy_device+0x27/0x60 [hid] [11359384.593475] [<ffffffffa00245a7>] usbhid_disconnect+0x27/0x50 [usbhid] [11359384.593480] [<ffffffff81553814>] usb_unbind_interface+0x64/0x1c0 [11359384.593484] [<ffffffff8149f08f>] __device_release_driver+0x7f/0xf0 [11359384.593487] [<ffffffff8149f123>] device_release_driver+0x23/0x30 [11359384.593492] [<ffffffff815539f8>] usb_driver_release_interface+0x88/0x90 [11359384.593496] [<ffffffff81553a2e>] usb_forced_unbind_intf+0x2e/0x60 [11359384.593500] [<ffffffff81553ab9>] unbind_marked_interfaces.isra.9+0x59/0x70 [11359384.593504] [<ffffffff81553bf9>] usb_unbind_and_rebind_marked_interfaces+0x19/0x30 [11359384.593507] [<ffffffff81548680>] usb_reset_device+0x140/0x1c0 [11359384.593513] [<ffffffffa0024bdf>] hid_reset+0x15f/0x1d0 [usbhid] [11359384.593517] [<ffffffff81086298>] process_one_work+0x178/0x470 [11359384.593521] [<ffffffff810870b1>] worker_thread+0x121/0x410 [11359384.593525] [<ffffffff81086f90>] ? rescuer_thread+0x430/0x430 [11359384.593528] [<ffffffff8108deb2>] kthread+0xd2/0xf0 [11359384.593532] [<ffffffff8108dde0>] ? kthread_create_on_node+0x1c0/0x1c0 [11359384.593535] [<ffffffff8173c2e8>] ret_from_fork+0x58/0x90 [11359384.593539] [<ffffffff8108dde0>] ? kthread_create_on_node+0x1c0/0x1c0 [11359504.693037] INFO: task khubd:71 blocked for more than 120 seconds. [11359504.693457] Not tainted 3.13.0-85-generic #129-Ubuntu [11359504.693849] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [11359504.694397] khubd D ffff88043fc93180 0 71 2 0x00000000 [11359504.694402] ffff880428cd7c80 0000000000000046 ffff8804293d6000 ffff880428cd7fd8 [11359504.694407] 0000000000013180 0000000000013180 ffff8804293d6000 ffff880428c290e8 [11359504.694411] ffff880428c290ec ffff8804293d6000 00000000ffffffff ffff880428c290f0 [11359504.694415] Call Trace: [11359504.694424] [<ffffffff81730089>] schedule_preempt_disabled+0x29/0x70 [11359504.694428] [<ffffffff81731ef5>] __mutex_lock_slowpath+0x135/0x1b0 [11359504.694432] [<ffffffff81731f8f>] mutex_lock+0x1f/0x2f [11359504.694438] [<ffffffff81545c04>] usb_disconnect+0x64/0x200 [11359504.694441] [<ffffffff815487d3>] hub_port_connect_change+0xd3/0xb20 [11359504.694446] [<ffffffff8154333d>] ? hub_port_status+0xdd/0x120 [11359504.694449] [<ffffffff815496f4>] hub_events+0x4d4/0xa20 [11359504.694452] [<ffffffff81549c75>] hub_thread+0x35/0x160 [11359504.694456] [<ffffffff810add60>] ? prepare_to_wait_event+0x100/0x100 [11359504.694459] [<ffffffff81549c40>] ? hub_events+0xa20/0xa20 [11359504.694463] [<ffffffff8108deb2>] kthread+0xd2/0xf0 [11359504.694467] [<ffffffff8108dde0>] ? kthread_create_on_node+0x1c0/0x1c0 [11359504.694471] [<ffffffff8173c2e8>] ret_from_fork+0x58/0x90 [11359504.694475] [<ffffffff8108dde0>] ? kthread_create_on_node+0x1c0/0x1c0 [11359504.694484] INFO: task kworker/4:2:18579 blocked for more than 120 seconds. [11359504.694964] Not tainted 3.13.0-85-generic #129-Ubuntu [11359504.695349] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [11359504.712710] kworker/4:2 D ffff88043fd13180 0 18579 2 0x00000000 [11359504.712725] Workqueue: events hid_reset [usbhid] [11359504.712727] ffff8803f27af850 0000000000000046 ffff8800badb9800 ffff8803f27affd8 [11359504.712730] 0000000000013180 0000000000013180 ffff8800badb9800 ffff8803f27af998 [11359504.712747] ffff8803f27af9a0 7fffffffffffffff ffff8800badb9800 ffff8800badb9800 [11359504.712772] Call Trace: ... [11359624.815201] INFO: task khubd:71 blocked for more than 120 seconds. [11359624.824377] Not tainted 3.13.0-85-generic #129-Ubuntu [11359624.833588] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [11359624.852395] khubd D ffff88043fc93180 0 71 2 0x00000000 [11359624.852398] ffff880428cd7c80 0000000000000046 ffff8804293d6000 ffff880428cd7fd8 [11359624.852401] 0000000000013180 0000000000013180 ffff8804293d6000 ffff880428c290e8 [11359624.852402] ffff880428c290ec ffff8804293d6000 00000000ffffffff ffff880428c290f0 [11359624.852412] Call Trace: ... [11359624.852460] INFO: task kworker/4:2:18579 blocked for more than 120 seconds. [11359624.871561] Not tainted 3.13.0-85-generic #129-Ubuntu [11359624.881830] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [11359624.902645] kworker/4:2 D ffff88043fd13180 0 18579 2 0x00000000 [11359624.902660] Workqueue: events hid_reset [usbhid] [11359624.902662] ffff8803f27af850 0000000000000046 ffff8800badb9800 ffff8803f27affd8 [11359624.902666] 0000000000013180 0000000000013180 ffff8800badb9800 ffff8803f27af998 [11359624.902669] ffff8803f27af9a0 7fffffffffffffff ffff8800badb9800 ffff8800badb9800 [11359624.902673] Call Trace: ... [11359745.001438] INFO: task khubd:71 blocked for more than 120 seconds. [11359745.011708] Not tainted 3.13.0-85-generic #129-Ubuntu [11359745.021981] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [11359745.042819] khubd D ffff88043fc93180 0 71 2 0x00000000 [11359745.042825] ffff880428cd7c80 0000000000000046 ffff8804293d6000 ffff880428cd7fd8 [11359745.042830] 0000000000013180 0000000000013180 ffff8804293d6000 ffff880428c290e8 [11359745.042834] ffff880428c290ec ffff8804293d6000 00000000ffffffff ffff880428c290f0 [11359745.042838] Call Trace: ** Changed in: linux (Ubuntu) Status: Expired => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1557172 Title: khubd/usbhid deadlock(?) creates processes in state D To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1557172/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
