Laptop with external USB Ethernet device using r8152 driver experiencing instability. Network suddenly stops responding, followed by applications that use the network ceasing responding. Eventually hard power cycle is required. Occurs roughly every few days. The dmesg output leads me to believe that the r8512 driver is involved, but I am a layperson and can't be sure. The device is: Bus 004 Device 009: ID 0bda:8153 Realtek Semiconductor Corp. I have saved dmesg output from two instances of this occurring: Instance 1: [ 2400.511975] INFO: task kworker/2:1:4630 blocked for more than 120 seconds. [ 2400.511979] Tainted: G O 3.16.0-4-amd64 #1 [ 2400.511980] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 2400.511981] kworker/2:1 D ffff880036a11748 0 4630 2 0x00000000 [ 2400.511989] Workqueue: pm pm_runtime_work [ 2400.511991] ffff880036a112f0 0000000000000046 0000000000012f00 ffff8800d5eebfd8 [ 2400.511993] 0000000000012f00 ffff880036a112f0 ffff8800d5eebca0 ffff8800d5eebc18 [ 2400.511994] ffff8800d5eebc98 ffff880036a112f0 0000000000000402 ffff880407b5dc00 [ 2400.511996] Call Trace: [ 2400.512002] [<ffffffff8150bbc9>] ? schedule_timeout+0x229/0x2a0 [ 2400.512006] [<ffffffff8109ddbf>] ? enqueue_task_fair+0x2cf/0xe20 [ 2400.512007] [<ffffffff8150d0d8>] ? wait_for_completion+0xa8/0x120 [ 2400.512009] [<ffffffff81096af0>] ? wake_up_state+0x10/0x10 [ 2400.512011] [<ffffffff810806fe>] ? flush_work+0xde/0x150 [ 2400.512014] [<ffffffff8107e680>] ? destroy_worker+0x80/0x80 [ 2400.512016] [<ffffffff810807de>] ? __cancel_work_timer+0x6e/0xf0 [ 2400.512024] [<ffffffffa06f6889>] ? rtl8152_suspend+0x49/0xa0 [r8152] [ 2400.512043] [<ffffffffa00a4d4a>] ? usb_suspend_both+0x9a/0x1d0 [usbcore] [ 2400.512048] [<ffffffffa00a617e>] ? usb_runtime_suspend+0x2e/0x70 [usbcore] [ 2400.512051] [<ffffffff813a9e6c>] ? __rpm_callback+0x2c/0x80 [ 2400.512052] [<ffffffff813a9f20>] ? rpm_callback+0x60/0x80 [ 2400.512054] [<ffffffff813aa047>] ? rpm_suspend+0x107/0x5f0 [ 2400.512056] [<ffffffff813ab4e2>] ? pm_runtime_work+0x72/0xa0 [ 2400.512057] [<ffffffff810814e2>] ? process_one_work+0x172/0x420 [ 2400.512059] [<ffffffff81081b73>] ? worker_thread+0x113/0x4f0 [ 2400.512061] [<ffffffff8150c291>] ? __schedule+0x2b1/0x710 [ 2400.512062] [<ffffffff81081a60>] ? rescuer_thread+0x2d0/0x2d0 [ 2400.512065] [<ffffffff81087dfd>] ? kthread+0xbd/0xe0 [ 2400.512067] [<ffffffff81087d40>] ? kthread_create_on_node+0x180/0x180 [ 2400.512068] [<ffffffff8150febc>] ? ret_from_fork+0x7c/0xb0 [ 2400.512070] [<ffffffff81087d40>] ? kthread_create_on_node+0x180/0x180 [ 2400.512072] INFO: task kworker/0:1:4645 blocked for more than 120 seconds. [ 2400.512073] Tainted: G O 3.16.0-4-amd64 #1 [ 2400.512073] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 2400.512074] kworker/0:1 D ffff88007e036568 0 4645 2 0x00000000 [ 2400.512078] Workqueue: events rtl_work_func_t [r8152] [ 2400.512078] ffff88007e036110 0000000000000046 0000000000012f00 ffff8802cf5cbfd8 [ 2400.512080] 0000000000012f00 ffff88007e036110 ffff880409a0e090 ffff880409a0e140 [ 2400.512081] ffff880409a0e200 0000000000000000 0000000000000000 ffff8802cf5cbcd8 [ 2400.512083] Call Trace: [ 2400.512085] [<ffffffff813aaaa1>] ? rpm_resume+0x191/0x5d0 [ 2400.512087] [<ffffffff810a7820>] ? prepare_to_wait_event+0xf0/0xf0 [ 2400.512089] [<ffffffff813aabda>] ? rpm_resume+0x2ca/0x5d0 [ 2400.512091] [<ffffffff813aaf28>] ? __pm_runtime_resume+0x48/0x70 [ 2400.512096] [<ffffffffa00a4a1d>] ? usb_autopm_get_interface+0x1d/0x50 [usbcore] [ 2400.512098] [<ffffffffa06f7ed2>] ? rtl_work_func_t+0x22/0x3e5 [r8152] [ 2400.512100] [<ffffffff810814e2>] ? process_one_work+0x172/0x420 [ 2400.512101] [<ffffffff81081b73>] ? worker_thread+0x113/0x4f0 [ 2400.512103] [<ffffffff8150c291>] ? __schedule+0x2b1/0x710 [ 2400.512105] [<ffffffff81081a60>] ? rescuer_thread+0x2d0/0x2d0 [ 2400.512106] [<ffffffff81087dfd>] ? kthread+0xbd/0xe0 [ 2400.512108] [<ffffffff81087d40>] ? kthread_create_on_node+0x180/0x180 [ 2400.512110] [<ffffffff8150febc>] ? ret_from_fork+0x7c/0xb0 [ 2400.512111] [<ffffffff81087d40>] ? kthread_create_on_node+0x180/0x180 ========================== Instance 2: [53649.690354] INFO: task NetworkManager:896 blocked for more than 120 seconds. [53649.690366] Tainted: G O 3.16.0-4-amd64 #1 [53649.690369] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [53649.690373] NetworkManager D ffff88040a1df708 0 896 1 0x00000000 [53649.690383] ffff88040a1df2b0 0000000000000086 0000000000012f00 ffff8800d6273fd8 [53649.690389] 0000000000012f00 ffff88040a1df2b0 ffff88034fb07890 ffff88034fb07940 [53649.690394] ffff88034fb07a00 0000000000000000 0000000000000000 ffff8800d6273cd0 [53649.690400] Call Trace: [53649.690418] [<ffffffff813aaaa1>] ? rpm_resume+0x191/0x5d0 [53649.690427] [<ffffffff810a7820>] ? prepare_to_wait_event+0xf0/0xf0 [53649.690434] [<ffffffff813aabda>] ? rpm_resume+0x2ca/0x5d0 [53649.690441] [<ffffffff811b31c6>] ? path_lookupat+0xf6/0x780 [53649.690448] [<ffffffff813aaf28>] ? __pm_runtime_resume+0x48/0x70 [53649.690509] [<ffffffffa007ba1d>] ? usb_autopm_get_interface+0x1d/0x50 [usbcore] [53649.690519] [<ffffffffa07c8623>] ? rtl8152_ioctl+0x33/0x130 [r8152] [53649.690530] [<ffffffff814f8a25>] ? wext_handle_ioctl+0x65/0xc0 [53649.690538] [<ffffffff81432354>] ? dev_ioctl+0x2e4/0x590 [53649.690546] [<ffffffff8118e70f>] ? kmem_cache_alloc_trace+0x21f/0x480 [53649.690553] [<ffffffff8140087a>] ? sock_ioctl+0x12a/0x2c0 [53649.690560] [<ffffffff811a97f9>] ? get_empty_filp+0xc9/0x1c0 [53649.690568] [<ffffffff811b9ecf>] ? do_vfs_ioctl+0x2cf/0x4b0 [53649.690573] [<ffffffff814002bf>] ? sock_alloc_file+0x9f/0x130 [53649.690578] [<ffffffff811ba131>] ? SyS_ioctl+0x81/0xa0 [53649.690584] [<ffffffff81403a1a>] ? SyS_socket+0x8a/0xc0 [53649.690592] [<ffffffff8150ff6d>] ? system_call_fast_compare_end+0x10/0x15 [53649.690630] INFO: task mission-control:2108 blocked for more than 120 seconds. [53649.690633] Tainted: G O 3.16.0-4-amd64 #1 [53649.690636] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [53649.690638] mission-control D ffff88040b867888 0 2108 1 0x00000000 [53649.690644] ffff88040b867430 0000000000000082 0000000000012f00 ffff88040b86bfd8 [53649.690650] 0000000000012f00 ffff88040b867430 ffffffff818bad20 ffff88040b86bc88 [53649.690655] ffffffff818bad24 ffff88040b867430 00000000ffffffff ffffffff818bad28 [53649.690661] Call Trace: [53649.690672] [<ffffffff8150cb35>] ? schedule_preempt_disabled+0x25/0x70 [53649.690677] [<ffffffff8150e5e3>] ? __mutex_lock_slowpath+0xd3/0x1c0 [53649.690683] [<ffffffff8150e6eb>] ? mutex_lock+0x1b/0x2a [53649.690691] [<ffffffff8142a4f5>] ? rtnetlink_rcv+0x15/0x30 [53649.690699] [<ffffffff81449700>] ? netlink_unicast+0xf0/0x1f0 [53649.690705] [<ffffffff81449b2e>] ? netlink_sendmsg+0x32e/0x680 [53649.690711] [<ffffffff8140317b>] ? sock_sendmsg+0x8b/0xc0 [53649.690718] [<ffffffff811baad0>] ? poll_select_copy_remaining+0x140/0x140 [53649.690724] [<ffffffff811baad0>] ? poll_select_copy_remaining+0x140/0x140 [53649.690730] [<ffffffff814032e1>] ? SYSC_sendto+0xf1/0x180 [53649.690737] [<ffffffff811ebc17>] ? eventfd_read+0x37/0x60 [53649.690747] [<ffffffff811a7ae3>] ? vfs_read+0x93/0x170 [53649.690753] [<ffffffff8150ff6d>] ? system_call_fast_compare_end+0x10/0x15 [53649.690766] INFO: task evolution-calen:2226 blocked for more than 120 seconds. [53649.690770] Tainted: G O 3.16.0-4-amd64 #1 [53649.690772] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [53649.690775] evolution-calen D ffff8803ec116828 0 2226 1 0x00000000 [53649.690779] ffff8803ec1163d0 0000000000000086 0000000000012f00 ffff8803ec203fd8 [53649.690784] 0000000000012f00 ffff8803ec1163d0 ffffffff818bad20 ffff8803ec203c88 [53649.690790] ffffffff818bad24 ffff8803ec1163d0 00000000ffffffff ffffffff818bad28 [53649.690795] Call Trace: [53649.690803] [<ffffffff8150cb35>] ? schedule_preempt_disabled+0x25/0x70 [53649.690808] [<ffffffff8150e5e3>] ? __mutex_lock_slowpath+0xd3/0x1c0 [53649.690813] [<ffffffff8150e6eb>] ? mutex_lock+0x1b/0x2a [53649.690821] [<ffffffff8142a4f5>] ? rtnetlink_rcv+0x15/0x30 [53649.690826] [<ffffffff81449700>] ? netlink_unicast+0xf0/0x1f0 [53649.690832] [<ffffffff81449b2e>] ? netlink_sendmsg+0x32e/0x680 [53649.690838] [<ffffffff8140317b>] ? sock_sendmsg+0x8b/0xc0 [53649.690844] [<ffffffff811b796f>] ? user_path_at_empty+0x5f/0x90 [53649.690850] [<ffffffff814032e1>] ? SYSC_sendto+0xf1/0x180 [53649.690856] [<ffffffff811ebc17>] ? eventfd_read+0x37/0x60 [53649.690863] [<ffffffff811a7ae3>] ? vfs_read+0x93/0x170 [53649.690869] [<ffffffff8150ff6d>] ? system_call_fast_compare_end+0x10/0x15 [53649.690879] INFO: task Chrome_IOThread:2411 blocked for more than 120 seconds. [53649.690882] Tainted: G O 3.16.0-4-amd64 #1 [53649.690884] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [53649.690887] Chrome_IOThread D ffff8803d9d290f8 0 2411 2110 0x00000000 [53649.690891] ffff8803d9d28ca0 0000000000000082 0000000000012f00 ffff8803d9d53fd8 [53649.690896] 0000000000012f00 ffff8803d9d28ca0 ffffffff818bad20 ffff8803d9d53e50 [53649.690901] ffffffff818bad24 ffff8803d9d28ca0 00000000ffffffff ffffffff818bad28 [53649.690906] Call Trace: [53649.690914] [<ffffffff8150cb35>] ? schedule_preempt_disabled+0x25/0x70 [53649.690919] [<ffffffff8150e5e3>] ? __mutex_lock_slowpath+0xd3/0x1c0 [53649.690928] [<ffffffff8147b709>] ? ip4_datagram_release_cb+0x39/0x1a0 [53649.690933] [<ffffffff8150e6eb>] ? mutex_lock+0x1b/0x2a [53649.690940] [<ffffffff8148f7e7>] ? ip_mc_drop_socket+0x27/0xc0 [53649.690946] [<ffffffff8148952d>] ? inet_release+0x3d/0x80 [53649.690951] [<ffffffff8140203a>] ? sock_release+0x1a/0x90 [53649.690956] [<ffffffff814020be>] ? sock_close+0xe/0x20 [53649.690961] [<ffffffff811a95aa>] ? __fput+0xca/0x1d0 [53649.690969] [<ffffffff81085027>] ? task_work_run+0x97/0xd0 [53649.690977] [<ffffffff81012ea9>] ? do_notify_resume+0x69/0xa0 [53649.690983] [<ffffffff8151022a>] ? int_signal+0x12/0x17 [53649.691016] INFO: task DNS Res~ver #35:23670 blocked for more than 120 seconds. [53649.691019] Tainted: G O 3.16.0-4-amd64 #1 [53649.691022] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [53649.691024] DNS Res~ver #35 D ffff8800c7272e38 0 23670 2110 0x00000000 [53649.691029] ffff8800c72729e0 0000000000000086 0000000000012f00 ffff88040a413fd8 [53649.691034] 0000000000012f00 ffff8800c72729e0 ffffffff818bad20 ffff88040a413c88 [53649.691039] ffffffff818bad24 ffff8800c72729e0 00000000ffffffff ffffffff818bad28 [53649.691043] Call Trace: [53649.691052] [<ffffffff8150cb35>] ? schedule_preempt_disabled+0x25/0x70 [53649.691057] [<ffffffff8150e5e3>] ? __mutex_lock_slowpath+0xd3/0x1c0 [53649.691062] [<ffffffff8150e6eb>] ? mutex_lock+0x1b/0x2a [53649.691069] [<ffffffff8142a4f5>] ? rtnetlink_rcv+0x15/0x30 [53649.691075] [<ffffffff81449700>] ? netlink_unicast+0xf0/0x1f0 [53649.691080] [<ffffffff81449b2e>] ? netlink_sendmsg+0x32e/0x680 [53649.691086] [<ffffffff8140317b>] ? sock_sendmsg+0x8b/0xc0 [53649.691092] [<ffffffff81448c31>] ? netlink_insert+0x131/0x220 [53649.691098] [<ffffffff814032e1>] ? SYSC_sendto+0xf1/0x180 [53649.691103] [<ffffffff814002bf>] ? sock_alloc_file+0x9f/0x130 [53649.691110] [<ffffffff811c3b8a>] ? __fd_install+0x1a/0x50 [53649.691116] [<ffffffff8150ff6d>] ? system_call_fast_compare_end+0x10/0x15 [53649.691126] INFO: task skype:28903 blocked for more than 120 seconds. [53649.691129] Tainted: G O 3.16.0-4-amd64 #1 [53649.691131] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [53649.691134] skype D ffff88030e0c6768 0 28903 2110 0x20020000 [53649.691139] ffff88030e0c6310 0000000000000082 0000000000012f00 ffff8803e570bfd8 [53649.691144] 0000000000012f00 ffff88030e0c6310 ffffffff818bad20 ffff8803e570bd90 [53649.691149] ffffffff818bad24 ffff88030e0c6310 00000000ffffffff ffffffff818bad28 [53649.691154] Call Trace: [53649.691162] [<ffffffff8150cb35>] ? schedule_preempt_disabled+0x25/0x70 [53649.691167] [<ffffffff8150e5e3>] ? __mutex_lock_slowpath+0xd3/0x1c0 [53649.691172] [<ffffffff8150e6eb>] ? mutex_lock+0x1b/0x2a [53649.691177] [<ffffffff814323f5>] ? dev_ioctl+0x385/0x590 [53649.691184] [<ffffffff8118e70f>] ? kmem_cache_alloc_trace+0x21f/0x480 [53649.691190] [<ffffffff81400f11>] ? compat_sock_ioctl+0x501/0xa60 [53649.691199] [<ffffffff81264c6f>] ? apparmor_file_alloc_security+0x1f/0x40 [53649.691204] [<ffffffff811a990b>] ? alloc_file+0x1b/0xb0 [53649.691209] [<ffffffff814002bf>] ? sock_alloc_file+0x9f/0x130 [53649.691215] [<ffffffff811f446a>] ? compat_SyS_ioctl+0xba/0x10b0 [53649.691221] [<ffffffff81403a1a>] ? SyS_socket+0x8a/0xc0 [53649.691228] [<ffffffff8116ed99>] ? do_munmap+0x299/0x3a0 [53649.691235] [<ffffffff8143c34f>] ? compat_SyS_socketcall+0x40f/0x500 [53649.691242] [<ffffffff8108643d>] ? posix_ktime_get_ts+0xd/0x10 [53649.691249] [<ffffffff81087830>] ? SyS_clock_gettime+0x60/0xa0 [53649.691258] [<ffffffff8151271a>] ? sysenter_dispatch+0x7/0x21 [53649.691267] INFO: task dropbox:29024 blocked for more than 120 seconds. [53649.691270] Tainted: G O 3.16.0-4-amd64 #1 [53649.691273] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [53649.691275] dropbox D ffff88038c6ed178 0 29024 1 0x00000000 [53649.691280] ffff88038c6ecd20 0000000000000082 0000000000012f00 ffff8803824c7fd8 [53649.691285] 0000000000012f00 ffff88038c6ecd20 ffffffff818bad20 ffff8803824c7c88 [53649.691290] ffffffff818bad24 ffff88038c6ecd20 00000000ffffffff ffffffff818bad28 [53649.691295] Call Trace: [53649.691303] [<ffffffff8150cb35>] ? schedule_preempt_disabled+0x25/0x70 [53649.691308] [<ffffffff8150e5e3>] ? __mutex_lock_slowpath+0xd3/0x1c0 [53649.691313] [<ffffffff8150e6eb>] ? mutex_lock+0x1b/0x2a [53649.691320] [<ffffffff8142a4f5>] ? rtnetlink_rcv+0x15/0x30 [53649.691325] [<ffffffff81449700>] ? netlink_unicast+0xf0/0x1f0 [53649.691331] [<ffffffff81449b2e>] ? netlink_sendmsg+0x32e/0x680 [53649.691337] [<ffffffff8140317b>] ? sock_sendmsg+0x8b/0xc0 [53649.691343] [<ffffffff81448c31>] ? netlink_insert+0x131/0x220 [53649.691348] [<ffffffff814032e1>] ? SYSC_sendto+0xf1/0x180 [53649.691354] [<ffffffff814002bf>] ? sock_alloc_file+0x9f/0x130 [53649.691359] [<ffffffff811c3b8a>] ? __fd_install+0x1a/0x50 [53649.691365] [<ffffffff8150ff6d>] ? system_call_fast_compare_end+0x10/0x15 [53649.691384] INFO: task kworker/1:2:22153 blocked for more than 120 seconds. [53649.691387] Tainted: G O 3.16.0-4-amd64 #1 [53649.691389] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [53649.691392] kworker/1:2 D ffff8800ce966628 0 22153 2 0x00000000 [53649.691402] Workqueue: events rtl_work_func_t [r8152] [53649.691405] ffff8800ce9661d0 0000000000000046 0000000000012f00 ffff880383567fd8 [53649.691411] 0000000000012f00 ffff8800ce9661d0 ffff88034fb07890 ffff88034fb07940 [53649.691416] ffff88034fb07a00 0000000000000000 0000000000000000 ffff880383567cd8 [53649.691420] Call Trace: [53649.691428] [<ffffffff813aaaa1>] ? rpm_resume+0x191/0x5d0 [53649.691434] [<ffffffff810a7820>] ? prepare_to_wait_event+0xf0/0xf0 [53649.691440] [<ffffffff813aabda>] ? rpm_resume+0x2ca/0x5d0 [53649.691447] [<ffffffff813aaf28>] ? __pm_runtime_resume+0x48/0x70 [53649.691472] [<ffffffffa007ba1d>] ? usb_autopm_get_interface+0x1d/0x50 [usbcore] [53649.691480] [<ffffffffa07cbed2>] ? rtl_work_func_t+0x22/0x3e5 [r8152] [53649.691486] [<ffffffff810814e2>] ? process_one_work+0x172/0x420 [53649.691491] [<ffffffff81081b73>] ? worker_thread+0x113/0x4f0 [53649.691498] [<ffffffff8150c291>] ? __schedule+0x2b1/0x710 [53649.691503] [<ffffffff81081a60>] ? rescuer_thread+0x2d0/0x2d0 [53649.691510] [<ffffffff81087dfd>] ? kthread+0xbd/0xe0 [53649.691517] [<ffffffff81087d40>] ? kthread_create_on_node+0x180/0x180 [53649.691523] [<ffffffff8150febc>] ? ret_from_fork+0x7c/0xb0 [53649.691530] [<ffffffff81087d40>] ? kthread_create_on_node+0x180/0x180 [53649.691544] INFO: task kworker/2:2:23560 blocked for more than 120 seconds. [53649.691547] Tainted: G O 3.16.0-4-amd64 #1 [53649.691549] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [53649.691552] kworker/2:2 D ffff88038260e468 0 23560 2 0x00000000 [53649.691562] Workqueue: pm pm_runtime_work [53649.691564] ffff88038260e010 0000000000000046 0000000000012f00 ffff8800c9c8bfd8 [53649.691569] 0000000000012f00 ffff88038260e010 ffff8800c9c8bca0 ffff8800c9c8bc18 [53649.691575] ffff8800c9c8bc98 ffff88038260e010 0000000000000402 ffff88040a393000 [53649.691580] Call Trace: [53649.691588] [<ffffffff8150bbc9>] ? schedule_timeout+0x229/0x2a0 [53649.691597] [<ffffffff8109f420>] ? check_preempt_wakeup+0x120/0x1d0 [53649.691603] [<ffffffff8150d0d8>] ? wait_for_completion+0xa8/0x120 [53649.691609] [<ffffffff81096af0>] ? wake_up_state+0x10/0x10 [53649.691614] [<ffffffff810806fe>] ? flush_work+0xde/0x150 [53649.691623] [<ffffffff8107e680>] ? destroy_worker+0x80/0x80 [53649.691628] [<ffffffff810807de>] ? __cancel_work_timer+0x6e/0xf0 [53649.691636] [<ffffffffa07ca889>] ? rtl8152_suspend+0x49/0xa0 [r8152] [53649.691656] [<ffffffffa007bd4a>] ? usb_suspend_both+0x9a/0x1d0 [usbcore] [53649.691690] [<ffffffffa007d17e>] ? usb_runtime_suspend+0x2e/0x70 [usbcore] [53649.691697] [<ffffffff813a9e6c>] ? __rpm_callback+0x2c/0x80 [53649.691703] [<ffffffff813a9f20>] ? rpm_callback+0x60/0x80 [53649.691709] [<ffffffff813aa047>] ? rpm_suspend+0x107/0x5f0 [53649.691716] [<ffffffff813ab4e2>] ? pm_runtime_work+0x72/0xa0 [53649.691721] [<ffffffff810814e2>] ? process_one_work+0x172/0x420 [53649.691726] [<ffffffff81081b73>] ? worker_thread+0x113/0x4f0 [53649.691731] [<ffffffff81081a60>] ? rescuer_thread+0x2d0/0x2d0 [53649.691737] [<ffffffff81087dfd>] ? kthread+0xbd/0xe0 [53649.691744] [<ffffffff81087d40>] ? kthread_create_on_node+0x180/0x180 [53649.691750] [<ffffffff8150febc>] ? ret_from_fork+0x7c/0xb0 [53649.691757] [<ffffffff81087d40>] ? kthread_create_on_node+0x180/0x180 [53649.691764] INFO: task mtr:23865 blocked for more than 120 seconds. [53649.691767] Tainted: G O 3.16.0-4-amd64 #1 [53649.691770] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [53649.691772] mtr D ffff880036c39908 0 23865 17232 0x00000004 [53649.691777] ffff880036c394b0 0000000000000082 0000000000012f00 ffff880134aaffd8 [53649.691782] 0000000000012f00 ffff880036c394b0 ffffffff818bad20 ffff880134aafe48 [53649.691787] ffffffff818bad24 ffff880036c394b0 00000000ffffffff ffffffff818bad28 [53649.691792] Call Trace: [53649.691800] [<ffffffff8150cb35>] ? schedule_preempt_disabled+0x25/0x70 [53649.691805] [<ffffffff8150e5e3>] ? __mutex_lock_slowpath+0xd3/0x1c0 [53649.691810] [<ffffffff8150e6eb>] ? mutex_lock+0x1b/0x2a [53649.691815] [<ffffffff814e9819>] ? ip6mr_sk_done+0x19/0xe0 [53649.691825] [<ffffffff814d4009>] ? rawv6_close+0x19/0x40 [53649.691830] [<ffffffff81489561>] ? inet_release+0x71/0x80 [53649.691836] [<ffffffff8140203a>] ? sock_release+0x1a/0x90 [53649.691841] [<ffffffff814020be>] ? sock_close+0xe/0x20 [53649.691846] [<ffffffff811a95aa>] ? __fput+0xca/0x1d0 [53649.691852] [<ffffffff81085027>] ? task_work_run+0x97/0xd0 [53649.691859] [<ffffffff81012ea9>] ? do_notify_resume+0x69/0xa0 [53649.691865] [<ffffffff8151022a>] ? int_signal+0x12/0x17
Seems to be fixed on more modern kernels with the patch id, 6cc69f2a404dea8641d6cf97c0fbe8d24579e259.