binder: 13841:13850 BC_REQUEST_DEATH_NOTIFICATION invalid ref 0
binder: 13841:13850 DecRefs 0 refcount change on invalid ref 0 ret -22
binder: 13841:13850 got reply transaction with no transaction stack
binder: 13841:13850 transaction failed 29201/-71, size 0-0 line 2922
binder: undelivered TRANSACTION_ERROR: 29201
INFO: task init:19663 blocked for more than 140 seconds.
      Not tainted 4.4.174+ #17
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
init            D ffff8800b6fcf718 29280 19663      1 0x00000000
 ffff8800b6fcf718 ffff8801d0342f80 c4c8057ad3501abb ffff8801d0342f80
 0000000000000000 ffff8801d0343800 ffff8801db71f180 ffff8801db71f1a8
 ffff8801db71e898 ffff8801d11ac740 ffff8801d0342f80 ffffed0016df9001
Call Trace:
 [<ffffffff82709b79>] schedule+0x99/0x1d0 kernel/sched/core.c:3355
 [<ffffffff8270a333>] schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3388
 [<ffffffff8270c492>] __mutex_lock_common kernel/locking/mutex.c:582 [inline]
 [<ffffffff8270c492>] mutex_lock_nested+0x3c2/0xb80 kernel/locking/mutex.c:621
 [<ffffffff81c8b2aa>] tty_open+0x56a/0xf50 drivers/tty/tty_io.c:2067
 [<ffffffff814a3ec0>] chrdev_open+0x230/0x630 fs/char_dev.c:388
 [<ffffffff8149154f>] do_dentry_open+0x38f/0xbd0 fs/open.c:749
 [<ffffffff81494d3b>] vfs_open+0x10b/0x210 fs/open.c:862
 [<ffffffff814c5ddf>] do_last fs/namei.c:3269 [inline]
 [<ffffffff814c5ddf>] path_openat+0x136f/0x4470 fs/namei.c:3406
 [<ffffffff814ccab1>] do_filp_open+0x1a1/0x270 fs/namei.c:3440
 [<ffffffff81495668>] do_sys_open+0x2f8/0x600 fs/open.c:1038
 [<ffffffff8149599d>] SYSC_open fs/open.c:1056 [inline]
 [<ffffffff8149599d>] SyS_open+0x2d/0x40 fs/open.c:1051
 [<ffffffff82718ba1>] entry_SYSCALL_64_fastpath+0x1e/0x9a
1 lock held by init/19663:
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81c8b2aa>] tty_open+0x56a/0xf50 drivers/tty/tty_io.c:2067
Sending NMI to all CPUs:
NMI backtrace for cpu 0
CPU: 0 PID: 20 Comm: khungtaskd Not tainted 4.4.174+ #17
task: ffff8801da6f4740 task.stack: ffff8800001c0000
RIP: 0010:[<ffffffff8109b617>]  [<ffffffff8109b617>] _flat_send_IPI_mask arch/x86/kernel/apic/apic_flat_64.c:62 [inline]
RIP: 0010:[<ffffffff8109b617>]  [<ffffffff8109b617>] flat_send_IPI_mask+0xf7/0x1b0 arch/x86/kernel/apic/apic_flat_64.c:69
RSP: 0018:ffff8800001c7c88  EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000c00 RCX: 0000000000000000
RDX: 0000000000000c00 RSI: 0000000000000000 RDI: ffffffffff5fc300
RBP: ffff8800001c7cb8 R08: 0000000000000018 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000246
R13: 0000000003000000 R14: ffffffff82e5f2e0 R15: 0000000000000002
FS:  0000000000000000(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000607304 CR3: 00000000b7d5c000 CR4: 00000000001606b0
Stack:
 0000000000000001 ffffffff82e5f2e0 ffffffff831a6ac0 fffffbfff0634c34
 000000000001b6c0 0000000000000008 ffff8800001c7cd8 ffffffff81092bee
 0000000000000008 ffffffff82924260 ffff8800001c7d30 ffffffff81ab8252
Call Trace:
 [<ffffffff81092bee>] nmi_raise_cpu_backtrace+0x5e/0x80 arch/x86/kernel/apic/hw_nmi.c:33
 [<ffffffff81ab8252>] nmi_trigger_all_cpu_backtrace.cold+0xa1/0xae lib/nmi_backtrace.c:85
 [<ffffffff81092ca4>] arch_trigger_all_cpu_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 [<ffffffff813b4762>] trigger_all_cpu_backtrace include/linux/nmi.h:44 [inline]
 [<ffffffff813b4762>] check_hung_task kernel/hung_task.c:125 [inline]
 [<ffffffff813b4762>] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline]
 [<ffffffff813b4762>] watchdog.cold+0xd3/0xee kernel/hung_task.c:238
 [<ffffffff811342c3>] kthread+0x273/0x310 kernel/kthread.c:211
 [<ffffffff82718fc5>] ret_from_fork+0x55/0x80 arch/x86/entry/entry_64.S:537
Code: 00 c3 5f ff 80 e6 10 75 e1 41 c1 e5 18 44 89 2c 25 10 c3 5f ff 44 89 fa 09 da 80 cf 04 41 83 ff 02 0f 44 d3 89 14 25 00 c3 5f ff <41> f7 c4 00 02 00 00 75 1e 4c 89 e7 57 9d 0f 1f 44 00 00 e8 f1 
NMI backtrace for cpu 1
CPU: 1 PID: 469 Comm: udevd Not tainted 4.4.174+ #17
task: ffff8800b8eec740 task.stack: ffff8801d6530000
RIP: 0010:[<ffffffff812009a2>]  [<ffffffff812009a2>] mark_irqflags kernel/locking/lockdep.c:2798 [inline]
RIP: 0010:[<ffffffff812009a2>]  [<ffffffff812009a2>] __lock_acquire+0x13f2/0x4f50 kernel/locking/lockdep.c:3169
RSP: 0018:ffff8801d6537860  EFLAGS: 00000046
RAX: 0000000000000000 RBX: 000000000000029f RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8800b8eecfd4
RBP: ffff8801d65379d8 R08: 0000000000000001 R09: 1ffff100171dda05
R10: ffffffff82836880 R11: 0000000000000000 R12: ffff8800b8eec740
R13: ffff8800b8eed030 R14: 0000000000000002 R15: 0000000000000000
FS:  00007f074297b7a0(0000) GS:ffff8801db700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000091fa1b4 CR3: 00000001d7371000 CR4: 00000000001606b0
Stack:
 ffff8801d1105400 ffff8801da402140 ffff8801d1104400 ffffffff81ab5c21
 ffff8801d6537ac0 ffffffff8148488a 000000400000000d ffff8801d65378a8
 ffff8800b8eed048 ffff8800b8eed000 ffff8800b8eed050 ffffffff00000000
Call Trace:
 [<ffffffff81205f6e>] lock_acquire+0x15e/0x450 kernel/locking/lockdep.c:3592
 [<ffffffff8270c191>] __mutex_lock_common kernel/locking/mutex.c:521 [inline]
 [<ffffffff8270c191>] mutex_lock_nested+0xc1/0xb80 kernel/locking/mutex.c:621
 [<ffffffff8156cb72>] inotify_poll+0xa2/0xf0 fs/notify/inotify/inotify_user.c:118
 [<ffffffff8156f4ab>] ep_item_poll fs/eventpoll.c:806 [inline]
 [<ffffffff8156f4ab>] ep_send_events_proc+0x36b/0xa60 fs/eventpoll.c:1518
 [<ffffffff8157174a>] ep_scan_ready_list+0x20a/0x890 fs/eventpoll.c:632
 [<ffffffff81571fb7>] ep_send_events fs/eventpoll.c:1566 [inline]
 [<ffffffff81571fb7>] ep_poll+0x157/0xae0 fs/eventpoll.c:1671
 [<ffffffff81575ff6>] SYSC_epoll_wait fs/eventpoll.c:2009 [inline]
 [<ffffffff81575ff6>] SyS_epoll_wait+0x166/0x1f0 fs/eventpoll.c:1974
 [<ffffffff82718ba1>] entry_SYSCALL_64_fastpath+0x1e/0x9a
Code: 08 84 d2 0f 85 e0 30 00 00 8b 05 3a e3 13 02 85 c0 0f 8f 8d 20 00 00 80 05 0b be dd 02 02 e9 ef f8 ff ff 85 d2 0f 85 2a 03 00 00 <49> 8d bc 24 b4 08 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa