SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=18953 comm=syz-executor.2 INFO: task kworker/dying:3 blocked for more than 140 seconds. Not tainted 4.9.180+ #3 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/dying D27336 3 2 0x90000000 0000000000000087 ffff8801da602f80 0000000000000000 ffff8801db621000 ffff8801d494af80 ffff8801db621018 ffff8801da6678c0 ffffffff8280932e 0000000000000246 ffff8801da602f80 0000000000000000 ffff8801db6218f0 Call Trace: [<000000009fc7f99d>] schedule+0x92/0x1c0 kernel/sched/core.c:3546 [<000000003fec8bdf>] __rt_mutex_slowlock+0x99/0x290 kernel/locking/rtmutex.c:1221 [<000000008b93c9af>] rt_mutex_slowlock+0x199/0x4c0 kernel/locking/rtmutex.c:1293 [<00000000bdcd2930>] rt_mutex_fastlock kernel/locking/rtmutex.c:1439 [inline] [<00000000bdcd2930>] rt_mutex_lock+0x2d/0x40 kernel/locking/rtmutex.c:1499 [<00000000c48c23a1>] process_notifier drivers/misc/uid_sys_stats.c:636 [inline] [<00000000c48c23a1>] process_notifier+0x96/0x670 drivers/misc/uid_sys_stats.c:625 [<000000008f57d5e1>] notifier_call_chain+0xb4/0x1d0 kernel/notifier.c:93 [<00000000806e6ebc>] __blocking_notifier_call_chain kernel/notifier.c:317 [inline] [<00000000806e6ebc>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] [<00000000806e6ebc>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] [<00000000806e6ebc>] blocking_notifier_call_chain+0x80/0xa0 kernel/notifier.c:325 [<000000007ce8153f>] profile_task_exit+0x1f/0x30 kernel/profile.c:140 [<00000000a0ea529c>] do_exit+0x90/0x2aa0 kernel/exit.c:744 [<00000000394519bc>] kthread+0x22b/0x310 kernel/kthread.c:214 [<000000009f6879b3>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:375 Showing all locks held in the system: 1 lock held by kworker/dying/3: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by kworker/dying/18: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 2 locks held by khungtaskd/24: #0: (rcu_read_lock){......}, at: [<000000007c21c293>] check_hung_uninterruptible_tasks kernel/hung_task.c:169 [inline] #0: (rcu_read_lock){......}, at: [<000000007c21c293>] watchdog+0x14b/0xaf0 kernel/hung_task.c:263 #1: (tasklist_lock){.+.+..}, at: [<0000000017e5159a>] debug_show_all_locks+0x7f/0x21f kernel/locking/lockdep.c:4336 1 lock held by kworker/dying/64: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by kworker/dying/351: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by rsyslogd/1902: #0: (&f->f_pos_lock){+.+.+.}, at: [<00000000d03f3475>] __fdget_pos+0xa8/0xd0 fs/file.c:782 2 locks held by getty/2030: #0: (&tty->ldisc_sem){++++++}, at: [<00000000c9ca2557>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377 #1: (&ldata->atomic_read_lock){+.+...}, at: [<00000000cefbf3f6>] n_tty_read+0x1fe/0x1820 drivers/tty/n_tty.c:2156 1 lock held by syz-executor.1/2108: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by syz-executor.3/2109: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by kworker/dying/2123: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by kworker/dying/2129: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by kworker/dying/2137: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by kworker/dying/2173: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by kworker/dying/2377: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by kworker/dying/9688: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by kworker/dying/9692: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by kworker/dying/9699: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by kworker/dying/9718: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by kworker/dying/9725: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 2 locks held by kworker/u4:12/9737: #0: ("events_unbound"){.+.+.+}, at: [<00000000cc5f831c>] process_one_work+0x790/0x1600 kernel/workqueue.c:2107 #1: ((&sub_info->work)){+.+.+.}, at: [<00000000f9a82910>] process_one_work+0x7ce/0x1600 kernel/workqueue.c:2111 1 lock held by kworker/dying/9749: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by syz-executor.2/13240: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by kworker/dying/13764: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by kworker/dying/13768: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by kworker/dying/13770: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by kworker/dying/17260: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by kworker/dying/17272: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by kworker/dying/17279: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by kworker/dying/17290: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by kworker/dying/18523: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 2 locks held by kworker/u4:22/18535: #0: ("events_unbound"){.+.+.+}, at: [<00000000cc5f831c>] process_one_work+0x790/0x1600 kernel/workqueue.c:2107 #1: ((&sub_info->work)){+.+.+.}, at: [<00000000f9a82910>] process_one_work+0x7ce/0x1600 kernel/workqueue.c:2111 1 lock held by syz-executor.5/21040: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by kworker/dying/29902: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by kworker/dying/29904: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by kworker/dying/29911: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by kworker/dying/10186: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by kworker/dying/10206: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by syz-executor.4/11476: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by kworker/dying/12356: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by kworker/dying/13236: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by kworker/dying/13239: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by kworker/dying/13250: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by syz-executor.0/18537: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by syz-executor.1/18943: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by syz-executor.1/18951: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by syz-executor.1/18958: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by syz-executor.1/18962: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by syz-executor.2/18947: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by syz-executor.2/18953: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by syz-executor.2/18964: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by syz-executor.2/18977: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by syz-executor.2/18979: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by syz-executor.5/18952: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by syz-executor.5/18981: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by syz-executor.4/18950: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by syz-executor.4/18956: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by syz-executor.4/18959: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by syz-executor.4/18971: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by syz-executor.4/18985: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by syz-executor.0/18972: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by syz-executor.0/18973: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by syz-executor.0/18974: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by modprobe/18980: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by modprobe/18982: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by syz-executor.3/18983: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by syz-executor.3/18984: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by syz-executor.3/18986: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<000000002ee387df>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 24 Comm: khungtaskd Not tainted 4.9.180+ #3 ffff8801d98efcc8 ffffffff81b577f1 0000000000000000 0000000000000000 0000000000000000 ffffffff81099901 dffffc0000000000 ffff8801d98efd00 ffffffff81b62a8c 0000000000000000 0000000000000000 0000000000000000 Call Trace: [<000000005922a473>] __dump_stack lib/dump_stack.c:15 [inline] [<000000005922a473>] dump_stack+0xc1/0x120 lib/dump_stack.c:51 [<00000000b02bff97>] nmi_cpu_backtrace.cold+0x47/0x87 lib/nmi_backtrace.c:99 [<0000000024a93c25>] nmi_trigger_cpumask_backtrace+0x124/0x155 lib/nmi_backtrace.c:60 [<000000001e80ec17>] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37 [<00000000b4c8df02>] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline] [<00000000b4c8df02>] check_hung_task kernel/hung_task.c:126 [inline] [<00000000b4c8df02>] check_hung_uninterruptible_tasks kernel/hung_task.c:183 [inline] [<00000000b4c8df02>] watchdog+0x670/0xaf0 kernel/hung_task.c:263 [<00000000a65290ee>] kthread+0x278/0x310 kernel/kthread.c:211 [<000000009f6879b3>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:375 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 11406 Comm: kworker/1:4 Not tainted 4.9.180+ #3 Workqueue: events_power_efficient gc_workerc task: 000000005ad591d3 task.stack: 00000000b74582a9 RIP: 0010:[] c [<00000000ec95876e>] debug_lockdep_rcu_enabled.part.0+0xb/0x60 kernel/rcu/update.c:262 RSP: 0018:ffff8801a818fa98 EFLAGS: 00000002 RAX: dffffc0000000000 RBX: ffff8801c9f417c0 RCX: 1ffffffff063fae0 RDX: 0000000000000004 RSI: 0000000000000001 RDI: ffff8801c9f4206c RBP: ffff8801a818faa8 R08: 0000000000000001 R09: 000000000000285a R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 R13: ffff8801c60407f0 R14: ffffffff833f2aa8 R15: 0000000000016483 FS: 0000000000000000(0000) GS:ffff8801db700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c4237e1010 CR3: 00000001d6ba4000 CR4: 00000000001606b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Stack: ffff8801a818faa8c ffffffff81247d91c ffff8801a818fb60c ffffffff8121101bc a4beede0ba531715c 0000000000000046c ffff8801c9f417c0c 0000000000000000c 0000000000000000c 0000000000000002c ffff8801a818fb60c 0000000000000046c Call Trace: [<00000000fbce7602>] trace_lock_release include/trace/events/lock.h:57 [inline] [<00000000fbce7602>] lock_release+0x8bb/0xc30 kernel/locking/lockdep.c:3774 [<000000004a1aa597>] seqcount_lockdep_reader_access include/linux/seqlock.h:81 [inline] [<000000004a1aa597>] read_seqcount_begin include/linux/seqlock.h:163 [inline] [<000000004a1aa597>] nf_conntrack_get_ht include/net/netfilter/nf_conntrack.h:325 [inline] [<000000004a1aa597>] gc_worker+0x132/0x600 net/netfilter/nf_conntrack_core.c:987 [<00000000ccbdc073>] process_one_work+0x88b/0x1600 kernel/workqueue.c:2114 [<0000000020f30242>] worker_thread+0x5df/0x11d0 kernel/workqueue.c:2251 [<00000000a65290ee>] kthread+0x278/0x310 kernel/kthread.c:211 [<000000009f6879b3>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:375 Code: ce9 c3c cff cff cff c48 c89 cdf ce8 cd3 c4e c2b c00 ce9 ca4 cfe cff cff c4c c89 cef ce8 cc6 c4e c2b c00 ce9 c6b cff cff cff c90 c48 cb8 c00 c00 c00 c00 c00 cfc cff cdf c55 c<48> c89 ce5 c53 c65 c48 c8b c1c c25 c00 c7e c01 c00 c48 c8d cbb cac c08 c00 c00 c48 c