binder: BINDER_SET_CONTEXT_MGR already set
binder: 20134:20137 ioctl 40046207 0 returned -16
binder: 20135:20138 BC_REQUEST_DEATH_NOTIFICATION invalid ref 0
binder: BINDER_SET_CONTEXT_MGR already set
binder: 20139:20143 ioctl 40046207 0 returned -16
INFO: task init:2598 blocked for more than 120 seconds.
      Not tainted 4.4.125-g38f41ec #63
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
init            D ffff88006b5a7718 29272  2598      1 0x00000000
 ffff88006b5a7718 ffff88018dc21800 0000000000000000 0000000000000007
 ffff88018dc21800 ffff8801db21fdb8 ffff8801db21fde0 ffff8801db21f4d8
 ffff8801db21f4c0 ffff880186986000 ffff88018dc21800 0000000000000000
Call Trace:
 [<ffffffff8376b82a>] schedule+0x7a/0x1b0 kernel/sched/core.c:3359
 [<ffffffff8376c023>] schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3392
 [<ffffffff837705e6>] __mutex_lock_common kernel/locking/mutex.c:582 [inline]
 [<ffffffff837705e6>] mutex_lock_nested+0x306/0x850 kernel/locking/mutex.c:621
 [<ffffffff81f4f7ea>] tty_open+0x4ca/0xee0 drivers/tty/tty_io.c:2058
 [<ffffffff8152a66b>] chrdev_open+0x22b/0x4c0 fs/char_dev.c:388
 [<ffffffff8151881b>] do_dentry_open+0x59b/0xba0 fs/open.c:749
 [<ffffffff8151c0e0>] vfs_open+0x110/0x210 fs/open.c:862
 [<ffffffff8154d373>] do_last fs/namei.c:3221 [inline]
 [<ffffffff8154d373>] path_openat+0x923/0x3940 fs/namei.c:3357
 [<ffffffff81553017>] do_filp_open+0x197/0x290 fs/namei.c:3392
 [<ffffffff8151cab9>] do_sys_open+0x369/0x660 fs/open.c:1038
 [<ffffffff8151cddd>] SYSC_open fs/open.c:1056 [inline]
 [<ffffffff8151cddd>] SyS_open+0x2d/0x40 fs/open.c:1051
 [<ffffffff83779965>] entry_SYSCALL_64_fastpath+0x22/0x9e
1 lock held by init/2598:
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81f4f7ea>] tty_open+0x4ca/0xee0 drivers/tty/tty_io.c:2058
Sending NMI to all CPUs:
NMI backtrace for cpu 0
CPU: 0 PID: 487 Comm: khungtaskd Not tainted 4.4.125-g38f41ec #63
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8800bace6000 task.stack: ffff8800bacf8000
RIP: 0010:[<ffffffff810c3f87>]  [<ffffffff810c3f87>] native_apic_mem_write arch/x86/include/asm/apic.h:94 [inline]
RIP: 0010:[<ffffffff810c3f87>]  [<ffffffff810c3f87>] __default_send_IPI_dest_field arch/x86/include/asm/ipi.h:119 [inline]
RIP: 0010:[<ffffffff810c3f87>]  [<ffffffff810c3f87>] _flat_send_IPI_mask arch/x86/kernel/apic/apic_flat_64.c:61 [inline]
RIP: 0010:[<ffffffff810c3f87>]  [<ffffffff810c3f87>] flat_send_IPI_mask+0xf7/0x1a0 arch/x86/kernel/apic/apic_flat_64.c:69
RSP: 0018:ffff8800bacffcb8  EFLAGS: 00000046
RAX: 0000000003000000 RBX: 0000000000000c00 RCX: 0000000000000000
RDX: 0000000000000c00 RSI: 0000000000000000 RDI: ffffffffff5fb300
RBP: ffff8800bacffce0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000246
R13: 0000000000000003 R14: ffffffff8426f5a0 R15: 0000000000000002
FS:  0000000000000000(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b9bc23000 CR3: 00000001789ba000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffffffff8426f5a0 ffffffff847f0b40 fffffbfff08fdc1c dffffc0000000000
 ffff8801db31bca0 ffff8800bacffd00 ffffffff810b9abb ffffffff839f6dc0
 0000000000000003 ffff8800bacffd60 ffffffff81d11764 ffffffff8141b993
Call Trace:
 [<ffffffff810b9abb>] nmi_raise_cpu_backtrace+0x5b/0x70 arch/x86/kernel/apic/hw_nmi.c:33
 [<ffffffff81d11764>] nmi_trigger_all_cpu_backtrace+0x4a4/0x550 lib/nmi_backtrace.c:85
 [<ffffffff810b9b54>] arch_trigger_all_cpu_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 [<ffffffff813695ca>] trigger_all_cpu_backtrace include/linux/nmi.h:44 [inline]
 [<ffffffff813695ca>] check_hung_task kernel/hung_task.c:125 [inline]
 [<ffffffff813695ca>] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline]
 [<ffffffff813695ca>] watchdog+0x6fa/0xae0 kernel/hung_task.c:238
 [<ffffffff81190b48>] kthread+0x268/0x300 kernel/kthread.c:211
 [<ffffffff83779d95>] ret_from_fork+0x55/0x80 arch/x86/entry/entry_64.S:510
Code: b3 5f ff f6 c4 10 75 e1 44 89 e8 c1 e0 18 89 04 25 10 b3 5f ff 44 89 fa 09 da 80 cf 04 41 83 ff 02 0f 44 d3 89 14 25 00 b3 5f ff <41> f7 c4 00 02 00 00 74 1a e8 2b 33 17 00 4c 89 e7 57 9d 0f 1f 
NMI backtrace for cpu 1
CPU: 1 PID: 20143 Comm: syz-executor5 Not tainted 4.4.125-g38f41ec #63
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff880176134800 task.stack: ffff8801756e0000
RIP: 0010:[<ffffffff81d6992d>]  [<ffffffff81d6992d>] __debug_check_no_obj_freed lib/debugobjects.c:689 [inline]
RIP: 0010:[<ffffffff81d6992d>]  [<ffffffff81d6992d>] debug_check_no_obj_freed+0x1bd/0x9b0 lib/debugobjects.c:726
RSP: 0018:ffff8801756e7c90  EFLAGS: 00000006
RAX: 0000000000000292 RBX: ffff8801ccc44300 RCX: 0000000000000009
RDX: 0000000000000000 RSI: ffff8801756e7d20 RDI: ffff8801cce9b868
RBP: ffff8801756e7d88 R08: 1ffff10016b19bca R09: ffffffff8512f880
R10: dead000000000200 R11: 1ffff1002eadcf58 R12: ffff8801c5c53e60
R13: ffff8801ccc43300 R14: ffff8801cce9b850 R15: dffffc0000000000
FS:  00007fd7dac08700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020664fc0 CR3: 0000000062d1a000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff880176134800 0000000000000000 0000000000000007 ffff880176134800
 1ffff1002eadcfa0 ffffffff85852fc0 ffff8801ccc45000 ffff8801ccc44300
 dffffc0000000000 ffff8801c6765990 00000000000ed580 fffffbfff0b0a5f8
Call Trace:
 [<ffffffff814fab4c>] slab_free_hook mm/slub.c:1376 [inline]
 [<ffffffff814fab4c>] slab_free_freelist_hook mm/slub.c:1405 [inline]
 [<ffffffff814fab4c>] slab_free mm/slub.c:2859 [inline]
 [<ffffffff814fab4c>] kmem_cache_free+0xbc/0x320 mm/slub.c:2881
 [<ffffffff815507be>] putname+0xee/0x130 fs/namei.c:255
 [<ffffffff81b20a66>] SYSC_mq_open ipc/mqueue.c:848 [inline]
 [<ffffffff81b20a66>] SyS_mq_open+0x266/0x940 ipc/mqueue.c:771
 [<ffffffff83779965>] entry_SYSCALL_64_fastpath+0x22/0x9e
Code: ba 00 02 00 00 00 00 ad de 31 c9 48 8d 75 98 4c 89 f2 48 c1 ea 03 42 80 3c 3a 00 0f 85 f0 03 00 00 49 8d 7e 18 83 c1 01 49 8b 16 <49> 89 f8 49 c1 e8 03 43 80 3c 38 00 0f 85 17 04 00 00 4d 8b 66