sched: DL replenish lagged too much FAT-fs (loop3): bogus number of reserved sectors FAT-fs (loop3): Can't find a valid FAT filesystem INFO: task syz-executor.5:2114 blocked for more than 140 seconds. Not tainted 4.9.168+ #40 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D28584 2114 2088 0x00000004 ffff8801c7e72f80 ffff8801ce801b80 ffff8801db621000 ffff8801d1ab4740 ffff8801db621018 ffff8801c79ff680 ffffffff8280028e 0000000000000246 ffff8801c7e72f80 0000000000000000 ffff8801db6218f0 1ffff10038f3febf Call Trace: [<000000005845d0f9>] schedule+0x92/0x1c0 kernel/sched/core.c:3546 [<00000000e74dcc0f>] __rt_mutex_slowlock+0x99/0x290 kernel/locking/rtmutex.c:1221 [<0000000005a227e3>] rt_mutex_slowlock+0x199/0x4c0 kernel/locking/rtmutex.c:1293 [<0000000078033a41>] rt_mutex_fastlock kernel/locking/rtmutex.c:1439 [inline] [<0000000078033a41>] rt_mutex_lock+0x2d/0x40 kernel/locking/rtmutex.c:1499 [<00000000c0c0afd0>] process_notifier drivers/misc/uid_sys_stats.c:636 [inline] [<00000000c0c0afd0>] process_notifier+0x96/0x670 drivers/misc/uid_sys_stats.c:625 [<00000000c5268438>] notifier_call_chain+0xb4/0x1d0 kernel/notifier.c:93 [<00000000e6ee892a>] __blocking_notifier_call_chain kernel/notifier.c:317 [inline] [<00000000e6ee892a>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] [<00000000e6ee892a>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] [<00000000e6ee892a>] blocking_notifier_call_chain+0x80/0xa0 kernel/notifier.c:325 [<00000000227134eb>] profile_task_exit+0x1f/0x30 kernel/profile.c:140 [<0000000030dbcd47>] do_exit+0x90/0x2aa0 kernel/exit.c:744 [<00000000b8c66f2a>] do_group_exit+0x111/0x300 kernel/exit.c:945 [<00000000400ca6ea>] get_signal+0x348/0x1aa0 kernel/signal.c:2380 [<00000000f66c84a3>] do_signal+0x9c/0x1920 arch/x86/kernel/signal.c:807 [<0000000007e3742b>] exit_to_usermode_loop+0x11c/0x160 arch/x86/entry/common.c:158 [<000000008b962dd0>] prepare_exit_to_usermode arch/x86/entry/common.c:194 [inline] [<000000008b962dd0>] syscall_return_slowpath arch/x86/entry/common.c:263 [inline] [<000000008b962dd0>] do_syscall_64+0x3f7/0x570 arch/x86/entry/common.c:290 [<0000000009ccbb7f>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb Showing all locks held in the system: 1 lock held by kworker/dying/3: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 2 locks held by khungtaskd/24: #0: (rcu_read_lock){......}, at: [<0000000078d75452>] check_hung_uninterruptible_tasks kernel/hung_task.c:168 [inline] #0: (rcu_read_lock){......}, at: [<0000000078d75452>] watchdog+0x13c/0xae0 kernel/hung_task.c:239 #1: (tasklist_lock){.+.+..}, at: [<000000007088cf16>] debug_show_all_locks+0x7f/0x21f kernel/locking/lockdep.c:4339 1 lock held by rsyslogd/1905: #0: (&f->f_pos_lock){+.+.+.}, at: [<00000000da72fe58>] __fdget_pos+0xa8/0xd0 fs/file.c:782 2 locks held by getty/2033: #0: (&tty->ldisc_sem){++++++}, at: [<00000000093a904a>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377 #1: (&ldata->atomic_read_lock){+.+...}, at: [<0000000096ce6e5d>] n_tty_read+0x1fe/0x1820 drivers/tty/n_tty.c:2156 1 lock held by syz-executor.5/2114: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by syz-executor.1/2115: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by syz-executor.2/2117: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by syz-executor.4/2118: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by syz-executor.3/2119: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 2 locks held by kworker/u4:3/2131: #0: ("events_unbound"){.+.+.+}, at: [<00000000971a6102>] process_one_work+0x790/0x1600 kernel/workqueue.c:2107 #1: ((&sub_info->work)){+.+.+.}, at: [<0000000020509397>] process_one_work+0x7ce/0x1600 kernel/workqueue.c:2111 2 locks held by kworker/u4:5/2144: #0: ("events_unbound"){.+.+.+}, at: [<00000000971a6102>] process_one_work+0x790/0x1600 kernel/workqueue.c:2107 #1: ((&sub_info->work)){+.+.+.}, at: [<0000000020509397>] process_one_work+0x7ce/0x1600 kernel/workqueue.c:2111 1 lock held by syz-executor.4/3433: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by syz-executor.4/3437: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by syz-executor.4/3462: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by syz-executor.4/3491: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by syz-executor.4/3456: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by syz-executor.4/3463: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by syz-executor.5/3466: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by syz-executor.5/3470: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by syz-executor.5/3493: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by syz-executor.3/3469: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by syz-executor.3/3474: #0: (loop_ctl_mutex/1){+.+.+.}, at: [<000000008c923017>] lo_ioctl+0x85/0x1a10 drivers/block/loop.c:1405 1 lock held by syz-executor.3/3488: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by syz-executor.3/3494: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by syz-executor.3/3496: #0: (loop_ctl_mutex/1){+.+.+.}, at: [<000000008c923017>] lo_ioctl+0x85/0x1a10 drivers/block/loop.c:1405 1 lock held by syz-executor.3/3497: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by syz-executor.1/3479: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by syz-executor.1/3486: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by syz-executor.1/3489: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by syz-executor.2/3481: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by syz-executor.2/3484: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by syz-executor.2/3490: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by loop3/3483: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by blkid/3492: #0: (loop_ctl_mutex/1){+.+.+.}, at: [<000000008c923017>] lo_ioctl+0x85/0x1a10 drivers/block/loop.c:1405 1 lock held by modprobe/3495: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by modprobe/3498: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by getty/3499: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by getty/3500: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by getty/3501: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by getty/3502: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by getty/3503: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 1 lock held by getty/3504: #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:316 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] __blocking_notifier_call_chain kernel/notifier.c:304 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain kernel/notifier.c:328 [inline] #0: ((task_exit_notifier).rwsem){.+.+..}, at: [<00000000be52b115>] blocking_notifier_call_chain+0x6a/0xa0 kernel/notifier.c:325 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 24 Comm: khungtaskd Not tainted 4.9.168+ #40 ffff8801d98d7cc8 ffffffff81b4f5d1 0000000000000001 0000000000000000 0000000000000001 ffffffff81097401 dffffc0000000000 ffff8801d98d7d00 ffffffff81b5a86c 0000000000000001 0000000000000000 0000000000000001 Call Trace: [<00000000ec04ad61>] __dump_stack lib/dump_stack.c:15 [inline] [<00000000ec04ad61>] dump_stack+0xc1/0x120 lib/dump_stack.c:51 [<00000000baff3d6c>] nmi_cpu_backtrace.cold+0x47/0x87 lib/nmi_backtrace.c:99 [<00000000250e0502>] nmi_trigger_cpumask_backtrace+0x124/0x155 lib/nmi_backtrace.c:60 [<0000000005bfd9b5>] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37 [<0000000008fecd60>] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline] [<0000000008fecd60>] check_hung_task kernel/hung_task.c:125 [inline] [<0000000008fecd60>] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline] [<0000000008fecd60>] watchdog+0x661/0xae0 kernel/hung_task.c:239 [<00000000ac38d188>] kthread+0x278/0x310 kernel/kthread.c:211 [<000000005a8d64e5>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at pc 0xffffffff8280f302