binder: 28897:28909 ioctl 40046207 0 returned -16
binder: BINDER_SET_CONTEXT_MGR already set
binder: 28905:28910 ioctl 40046207 0 returned -16
binder: BINDER_SET_CONTEXT_MGR already set
binder: 28903:28913 ioctl 40046207 0 returned -16
INFO: task init:8553 blocked for more than 140 seconds.
      Not tainted 4.4.171+ #12
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
init            D ffff8800b52175b0 28912  8553      1 0x00000000
 ffff8800b52175b0 ffff8801d3c5d008 0000000000000001 0000000000000000
 ffff8800b52176d8 0000000000000000 ffff8801db71f180 ffff8801db71f1a8
 ffff8801db71e898 ffff8801d3c5df00 ffff8801d3c5c740 ffffed0016a42001
Call Trace:
 [<ffffffff82709249>] schedule+0x99/0x1d0 kernel/sched/core.c:3355
 [<ffffffff8271531b>] schedule_timeout+0x47b/0x7c0 kernel/time/timer.c:1515
 [<ffffffff82712349>] __down_common kernel/locking/semaphore.c:221 [inline]
 [<ffffffff82712349>] __down+0x189/0x2a0 kernel/locking/semaphore.c:238
 [<ffffffff811f4c74>] down+0x64/0x90 kernel/locking/semaphore.c:61
 [<ffffffff8121b58c>] console_lock+0x2c/0x80 kernel/printk/printk.c:2164
 [<ffffffff81220c5c>] console_device+0x1c/0xc0 kernel/printk/printk.c:2435
 [<ffffffff81c8b177>] tty_lookup_driver drivers/tty/tty_io.c:2000 [inline]
 [<ffffffff81c8b177>] tty_open+0x8e7/0xf50 drivers/tty/tty_io.c:2068
 [<ffffffff814a3aa0>] chrdev_open+0x230/0x630 fs/char_dev.c:388
 [<ffffffff814912af>] do_dentry_open+0x38f/0xbd0 fs/open.c:749
 [<ffffffff81494a9b>] vfs_open+0x10b/0x210 fs/open.c:862
 [<ffffffff814c59bf>] do_last fs/namei.c:3269 [inline]
 [<ffffffff814c59bf>] path_openat+0x136f/0x4470 fs/namei.c:3406
 [<ffffffff814cc691>] do_filp_open+0x1a1/0x270 fs/namei.c:3440
 [<ffffffff814953c8>] do_sys_open+0x2f8/0x600 fs/open.c:1038
 [<ffffffff814956fd>] SYSC_open fs/open.c:1056 [inline]
 [<ffffffff814956fd>] SyS_open+0x2d/0x40 fs/open.c:1051
 [<ffffffff82717fe1>] entry_SYSCALL_64_fastpath+0x1e/0x9a
1 lock held by init/8553:
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81c8adfa>] tty_open+0x56a/0xf50 drivers/tty/tty_io.c:2067
Sending NMI to all CPUs:
NMI backtrace for cpu 0
CPU: 0 PID: 2254 Comm: syz-executor674 Not tainted 4.4.171+ #12
task: ffff8801d1f4af80 task.stack: ffff8801d0c58000
RIP: 0010:[<ffffffff81ad89b8>]  [<ffffffff81ad89b8>] delay_tsc+0x38/0xc0 arch/x86/lib/delay.c:67
RSP: 0018:ffff8801d0c5f6c8  EFLAGS: 00000002
RAX: 0000000000000002 RBX: 000002ef9ca474eb RCX: 0000000000000000
RDX: 0000000000000004 RSI: ffffffff81b0a74c RDI: 0000000000000001
RBP: ffff8801d0c5f6e8 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: ffffffff83fdf198 R12: 000002ef9ca46f6e
R13: 0000000000000000 R14: 00000000000008fd R15: fffffbfff092dca5
FS:  0000000000000000(0000) GS:ffff8801db600000(0063) knlGS:00000000f7742b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f7741cbc CR3: 00000001d12f5000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffffffff8496e4e0 0000000000002706 0000000000000020 fffffbfff092dce3
 ffff8801d0c5f6f8 ffffffff81ad88c0 ffff8801d0c5f708 ffffffff81ad88fa
 ffff8801d0c5f758 ffffffff81cc411f ffffed003a18bf01 ffffffff8496e528
Call Trace:
 [<ffffffff81ad88c0>] __delay+0x10/0x20 arch/x86/lib/delay.c:160
 [<ffffffff81ad88fa>] __const_udelay+0x2a/0x30 arch/x86/lib/delay.c:174
 [<ffffffff81cc411f>] wait_for_xmitr+0x6f/0x1e0 drivers/tty/serial/8250/8250_port.c:1725
 [<ffffffff81cc42b0>] serial8250_console_putchar+0x20/0x60 drivers/tty/serial/8250/8250_port.c:2806
 [<ffffffff81caf2e6>] uart_console_write+0x56/0xe0 drivers/tty/serial/serial_core.c:1789
 [<ffffffff81ccdc4b>] serial8250_console_write+0x2fb/0x870 drivers/tty/serial/8250/8250_port.c:2872
 [<ffffffff81cbd36f>] univ8250_console_write+0x5f/0x70 drivers/tty/serial/8250/8250_core.c:594
 [<ffffffff8121c6ef>] call_console_drivers.constprop.0+0x1ef/0x3f0 kernel/printk/printk.c:1468
 [<ffffffff8121fbf2>] console_unlock kernel/printk/printk.c:2335 [inline]
 [<ffffffff8121fbf2>] console_unlock+0x602/0xa10 kernel/printk/printk.c:2242
 [<ffffffff812203b2>] vprintk_emit+0x3b2/0x820 kernel/printk/printk.c:1837
 [<ffffffff81220848>] vprintk+0x28/0x30 kernel/printk/printk.c:1848
 [<ffffffff813afb69>] printk+0xc2/0xf5 kernel/printk/printk.c:1927
 [<ffffffff8216a1ae>] binder_ioctl.cold+0x179/0x305 drivers/android/binder.c:4896
 [<ffffffff8159aea3>] C_SYSC_ioctl fs/compat_ioctl.c:1592 [inline]
 [<ffffffff8159aea3>] compat_SyS_ioctl+0x403/0x2210 fs/compat_ioctl.c:1544
 [<ffffffff8100603d>] do_syscall_32_irqs_on arch/x86/entry/common.c:330 [inline]
 [<ffffffff8100603d>] do_fast_syscall_32+0x32d/0xa90 arch/x86/entry/common.c:397
 [<ffffffff82719790>] sysenter_flags_fixed+0xd/0x1a
Code: 00 41 55 41 54 53 e8 88 47 68 ff e8 73 1f 03 00 41 89 c5 0f ae e8 0f 31 48 c1 e2 20 48 09 c2 49 89 d4 eb 16 f3 90 bf 01 00 00 00 <e8> 63 47 68 ff e8 4e 1f 03 00 44 39 e8 75 36 0f ae e8 0f 31 48 
NMI backtrace for cpu 1
CPU: 1 PID: 20 Comm: khungtaskd Not tainted 4.4.171+ #12
task: ffff8801da6c4740 task.stack: ffff8801d9ef0000
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:ffff8801d9ef7c88  EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000c00 RCX: 0000000000000000
RDX: 0000000000000c00 RSI: 0000000000000000 RDI: ffffffffff5fc300
RBP: ffff8801d9ef7cb8 R08: 0000000000000018 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000246
R13: 0000000003000000 R14: ffffffff82e5f2e0 R15: 0000000000000002
FS:  0000000000000000(0000) GS:ffff8801db700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000080fd738 CR3: 00000000b454f000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 0000000000000001 ffffffff82e5f2e0 ffffffff831a6840 fffffbfff0634be4
 000000000001b6c0 0000000000000008 ffff8801d9ef7cd8 ffffffff81092bee
 0000000000000008 ffffffff82924260 ffff8801d9ef7d30 ffffffff81ab7de2
Call Trace:
 [<ffffffff81092bee>] nmi_raise_cpu_backtrace+0x5e/0x80 arch/x86/kernel/apic/hw_nmi.c:33
 [<ffffffff81ab7de2>] 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
 [<ffffffff813b4556>] trigger_all_cpu_backtrace include/linux/nmi.h:44 [inline]
 [<ffffffff813b4556>] check_hung_task kernel/hung_task.c:125 [inline]
 [<ffffffff813b4556>] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline]
 [<ffffffff813b4556>] watchdog.cold+0xd3/0xee kernel/hung_task.c:238
 [<ffffffff811340b3>] kthread+0x273/0x310 kernel/kthread.c:211
 [<ffffffff82718405>] 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 e1