binder: 11657:11660 transaction failed 29201/-71, size 64-8 line 2926
binder_alloc: 11657: binder_alloc_buf, no vma
binder: 11657:11663 transaction failed 29189/-3, size 40-8 line 3133
binder: undelivered TRANSACTION_ERROR: 29189
binder: undelivered TRANSACTION_ERROR: 29201
INFO: task blkid:8068 blocked for more than 120 seconds.
      Not tainted 4.9.93-gf6bec4e #4
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
blkid           D28232  8068   5292 0x00000006
 ffff8801d61db000 ffff8801bc158fc0 ffff8801d6c00fc0 ffff8801c1f60000
 ffff8801db321b98 ffff8801d4cc7310 ffffffff838c4a7d 0000000041b58ab3
 ffffffff841a45f8 ffffffff81233c80 00ff8801d4cc74e8 ffff8801db322468
Call Trace:
 [<ffffffff838c607f>] schedule+0x7f/0x1b0 kernel/sched/core.c:3556
 [<ffffffff838d2491>] schedule_timeout+0x861/0xf70 kernel/time/timer.c:1768
 [<ffffffff838c425a>] io_schedule_timeout+0x1ba/0x390 kernel/sched/core.c:5178
 [<ffffffff838c74c9>] io_schedule include/linux/sched.h:460 [inline]
 [<ffffffff838c74c9>] bit_wait_io+0x19/0xa0 kernel/sched/wait.c:582
 [<ffffffff838c6d6e>] __wait_on_bit_lock+0xce/0x1c0 kernel/sched/wait.c:421
 [<ffffffff8143244f>] __lock_page+0xff/0x160 mm/filemap.c:934
 [<ffffffff814695e8>] lock_page include/linux/pagemap.h:454 [inline]
 [<ffffffff814695e8>] truncate_inode_pages_range+0x818/0x1290 mm/truncate.c:373
 [<ffffffff8146a084>] truncate_inode_pages+0x24/0x30 mm/truncate.c:401
 [<ffffffff8162bdfc>] kill_bdev+0xbc/0xf0 fs/block_dev.c:96
 [<ffffffff8162e143>] __blkdev_put+0x1e3/0x840 fs/block_dev.c:1586
 [<ffffffff8162f585>] blkdev_put+0x85/0x560 fs/block_dev.c:1663
 [<ffffffff8162faeb>] blkdev_close+0x8b/0xb0 fs/block_dev.c:1670
 [<ffffffff81575a63>] __fput+0x263/0x700 fs/file_table.c:208
 [<ffffffff81575f85>] ____fput+0x15/0x20 fs/file_table.c:244
 [<ffffffff81195e2c>] task_work_run+0x10c/0x180 kernel/task_work.c:116
 [<ffffffff8113ea61>] exit_task_work include/linux/task_work.h:21 [inline]
 [<ffffffff8113ea61>] do_exit+0x9e1/0x27c0 kernel/exit.c:837
 [<ffffffff81144b61>] do_group_exit+0x111/0x340 kernel/exit.c:941
 [<ffffffff811679df>] get_signal+0x4cf/0x1450 kernel/signal.c:2317
 [<ffffffff810524d7>] do_signal+0x87/0x19f0 arch/x86/kernel/signal.c:807
 [<ffffffff81005581>] exit_to_usermode_loop+0xe1/0x120 arch/x86/entry/common.c:157
 [<ffffffff810064d4>] prepare_exit_to_usermode arch/x86/entry/common.c:191 [inline]
 [<ffffffff810064d4>] syscall_return_slowpath arch/x86/entry/common.c:260 [inline]
 [<ffffffff810064d4>] do_syscall_64+0x364/0x490 arch/x86/entry/common.c:287
 [<ffffffff838d5953>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb

Showing all locks held in the system:
2 locks held by khungtaskd/515:
 #0:  (rcu_read_lock){......}, at: [<ffffffff813643dc>] check_hung_uninterruptible_tasks kernel/hung_task.c:168 [inline]
 #0:  (rcu_read_lock){......}, at: [<ffffffff813643dc>] watchdog+0x11c/0xa20 kernel/hung_task.c:239
 #1:  (tasklist_lock){.+.+..}, at: [<ffffffff81423b90>] debug_show_all_locks+0x79/0x218 kernel/locking/lockdep.c:4336
2 locks held by getty/3746:
 #0:  (&tty->ldisc_sem){++++++}, at: [<ffffffff838d3b22>] ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:367
 #1:  (&ldata->atomic_read_lock){+.+.+.}, at: [<ffffffff82007e22>] n_tty_read+0x202/0x16b0 drivers/tty/n_tty.c:2133
1 lock held by blkid/8068:
 #0:  (&bdev->bd_mutex){+.+.+.}, at: [<ffffffff8162e01b>] __blkdev_put+0xbb/0x840 fs/block_dev.c:1579

=============================================

NMI backtrace for cpu 1
CPU: 1 PID: 515 Comm: khungtaskd Not tainted 4.9.93-gf6bec4e #4
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d871fd08 ffffffff81d9c299 0000000000000000 0000000000000001
 0000000000000001 0000000000000001 ffffffff810b7d90 ffff8801d871fd40
 ffffffff81da75d7 0000000000000001 0000000000000000 0000000000000002
Call Trace:
 [<ffffffff81d9c299>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d9c299>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81da75d7>] nmi_cpu_backtrace.cold.2+0x48/0x87 lib/nmi_backtrace.c:99
 [<ffffffff81da756a>] nmi_trigger_cpumask_backtrace+0x12a/0x14f lib/nmi_backtrace.c:60
 [<ffffffff810b7e94>] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37
 [<ffffffff81364974>] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline]
 [<ffffffff81364974>] check_hung_task kernel/hung_task.c:125 [inline]
 [<ffffffff81364974>] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline]
 [<ffffffff81364974>] watchdog+0x6b4/0xa20 kernel/hung_task.c:239
 [<ffffffff8119ab4d>] kthread+0x26d/0x300 kernel/kthread.c:211
 [<ffffffff838d5b1c>] 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
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.9.93-gf6bec4e #4
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffffffff84429800 task.stack: ffffffff84400000
RIP: 0010:[<ffffffff8123447f>] 
c [<ffffffff8123447f>] iterate_chain_key kernel/locking/lockdep.c:317 [inline]
RIP: 0010:[<ffffffff8123447f>] 
c [<ffffffff8123447f>] __lock_acquire+0x7ff/0x4080 kernel/locking/lockdep.c:3340
RSP: 0018:ffff8801db207d10  EFLAGS: 00000096
RAX: 000000001a1b19eb RBX: ffffffff8442a0c0 RCX: 00000000ffffffd1
RDX: 00000000000be61f RSI: ffffffff8442a0c0 RDI: 0000000000000000
RBP: ffff8801db207eb8 R08: ffffffff8442a0e0 R09: 0000000000000001
R10: ffffffff84429800 R11: 0000000000000001 R12: 000000001a1b19eb
R13: 0000000000000000 R14: 00000000e5e4da55 R15: 00000000fff40e50
FS:  0000000000000000(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa84650fdb8 CR3: 00000001ce386000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffffffff81233c80
c 000000000000000b
c ffff8801db218558
c 0000000c00000008
c
 0000000b00000020
c ffff8801db207d78
c ffffffff81e03c9b
c ffffffff8442a0b8
c
 ffffffff8442a0c0
c 0000000000000246
c 000000000000c6d4
c ffffffff81205722
c
Call Trace:
 [<ffffffff81238770>] lock_acquire+0x130/0x3e0 kernel/locking/lockdep.c:3756
 [<ffffffff812b4c5a>] seqcount_lockdep_reader_access include/linux/seqlock.h:80 [inline]
 [<ffffffff812b4c5a>] read_seqcount_begin include/linux/seqlock.h:163 [inline]
 [<ffffffff812b4c5a>] ktime_get+0x11a/0x1e0 kernel/time/timekeeping.c:757
 [<ffffffff812cc2ec>] tick_nohz_irq_enter kernel/time/tick-sched.c:1144 [inline]
 [<ffffffff812cc2ec>] tick_irq_enter+0xcc/0x220 kernel/time/tick-sched.c:1165
 [<ffffffff81148ca3>] irq_enter+0xb3/0xd0 kernel/softirq.c:345
 [<ffffffff838da07a>] smp_reschedule_interrupt+0xa/0x90 arch/x86/kernel/smp.c:267
 [<ffffffff838d7c50>] reschedule_interrupt+0xa0/0xb0 arch/x86/entry/entry_64.S:671
 <EOI> 
d [<ffffffff838d4586>] ? native_safe_halt+0x6/0x10 arch/x86/include/asm/irqflags.h:53
 [<ffffffff838d3bc5>] arch_safe_halt arch/x86/include/asm/paravirt.h:104 [inline]
 [<ffffffff838d3bc5>] default_idle+0x55/0x360 arch/x86/kernel/process.c:295
 [<ffffffff81069fa0>] arch_cpu_idle+0x10/0x20 arch/x86/kernel/process.c:286
 [<ffffffff838d49e5>] default_idle_call+0x45/0x60 kernel/sched/idle.c:97
 [<ffffffff81220765>] cpuidle_idle_call kernel/sched/idle.c:155 [inline]
 [<ffffffff81220765>] cpu_idle_loop kernel/sched/idle.c:248 [inline]
 [<ffffffff81220765>] cpu_startup_entry+0x2b5/0x380 kernel/sched/idle.c:303
 [<ffffffff838c184c>] rest_init+0x183/0x189 init/main.c:409
 [<ffffffff84a73943>] start_kernel+0x67e/0x6b2 init/main.c:664
 [<ffffffff84a7229a>] x86_64_start_reservations+0x29/0x2b arch/x86/kernel/head64.c:196
 [<ffffffff84a723db>] x86_64_start_kernel+0x13f/0x162 arch/x86/kernel/head64.c:177
Code: 
c41 
c31 
cce 
c44 
c89 
cf0 
c45 
c29 
cf7 
c41 
c01 
cd6 
cc1 
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c08 
c44 
c31 
cf8 
c29 
cc2 
c41 
c89 
cc7 
c41 
cc1 
cc7 
c10 
c41 
c89 
cd4 
c45 
c31 
cfc 
c46 
c8d 
c3c 
c30 
c44 
c89 
ce0 
c45 
c29 
ce6 
c<c1> 
cc8 
c0d 
c44 
c89 
cfa 
c45 
c01 
ce7 
c41 
c31 
cc6 
c44 
c89 
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c44 
c29 
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c04 
c