binder: BINDER_SET_CONTEXT_MGR already set
binder: 18054:18085 Release 1 refcount change on invalid ref 1 ret -22
binder: 18054:18081 ioctl 40046207 0 returned -16
binder: send failed reply for transaction 104 to 18054:18070
binder: undelivered TRANSACTION_ERROR: 29189
INFO: task syz-executor0:3879 blocked for more than 140 seconds.
      Not tainted 4.4.145-g2241aa9 #14
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor0   D ffff8801bdd379c8 26272  3879      1 0x20020004
 ffff8801bdd379c8 0000000000000000 ffff8801d93550e0 ffffed003b26aa1b
 ffff8801d9354800 ffff8801db31fe38 ffff8801db31fe60 ffff8801db31f558
 ffff8801db31f540 ffff8800bb866000 ffff8801d9354800 0000000000000000
Call Trace:
 [<ffffffff838ba4aa>] schedule+0x7a/0x1b0 kernel/sched/core.c:3355
 [<ffffffff838bac43>] schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3388
 [<ffffffff838c0d87>] __mutex_lock_common kernel/locking/mutex.c:582 [inline]
 [<ffffffff838c0d87>] mutex_lock_nested+0x307/0x850 kernel/locking/mutex.c:621
 [<ffffffff8251f88c>] lo_ioctl+0x8c/0x16c0 drivers/block/loop.c:1364
 [<ffffffff82520f72>] lo_compat_ioctl+0xb2/0x140 drivers/block/loop.c:1560
 [<ffffffff81e03ed5>] compat_blkdev_ioctl+0x395/0x3a10 block/compat_ioctl.c:751
 [<ffffffff8162aab4>] C_SYSC_ioctl fs/compat_ioctl.c:1592 [inline]
 [<ffffffff8162aab4>] compat_SyS_ioctl+0x484/0x2270 fs/compat_ioctl.c:1544
 [<ffffffff81006d94>] do_syscall_32_irqs_on arch/x86/entry/common.c:393 [inline]
 [<ffffffff81006d94>] do_fast_syscall_32+0x324/0x8b0 arch/x86/entry/common.c:460
 [<ffffffff838c9e43>] sysenter_flags_fixed+0xd/0x1a
1 lock held by syz-executor0/3879:
 #0:  (&lo->lo_ctl_mutex/1){+.+.+.}, at: [<ffffffff8251f88c>] lo_ioctl+0x8c/0x16c0 drivers/block/loop.c:1364
Sending NMI to all CPUs:
NMI backtrace for cpu 0
CPU: 0 PID: 491 Comm: khungtaskd Not tainted 4.4.145-g2241aa9 #14
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8800bad46000 task.stack: ffff8801d8e98000
RIP: 0010:[<ffffffff810c1c46>]  [<ffffffff810c1c46>] native_apic_mem_write arch/x86/include/asm/apic.h:93 [inline]
RIP: 0010:[<ffffffff810c1c46>]  [<ffffffff810c1c46>] __default_send_IPI_dest_field arch/x86/include/asm/ipi.h:119 [inline]
RIP: 0010:[<ffffffff810c1c46>]  [<ffffffff810c1c46>] _flat_send_IPI_mask arch/x86/kernel/apic/apic_flat_64.c:61 [inline]
RIP: 0010:[<ffffffff810c1c46>]  [<ffffffff810c1c46>] flat_send_IPI_mask+0xf6/0x1a0 arch/x86/kernel/apic/apic_flat_64.c:69
RSP: 0018:ffff8801d8e9fcc8  EFLAGS: 00000046
RAX: 0000000003000000 RBX: 0000000000000c00 RCX: 0000000000000000
RDX: 0000000000000c00 RSI: 0000000000000000 RDI: ffffffffff5fb300
RBP: ffff8801d8e9fcf0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000246
R13: 0000000000000003 R14: 0000000000000002 R15: ffffffff84470220
FS:  0000000000000000(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe1f3fbe000 CR3: 00000000b14d9000 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffffffff84470220 ffffffff84a1a7c0 0000000000000007 fffffbfff0942fac
 0000000000000040 ffff8801d8e9fd10 ffffffff810b7c01 ffffffff83c0d1a0
 0000000000000003 ffff8801d8e9fd68 ffffffff81e1d443 ffffffff8141005f
Call Trace:
 [<ffffffff810b7c01>] nmi_raise_cpu_backtrace+0x61/0x80 arch/x86/kernel/apic/hw_nmi.c:33
 [<ffffffff81e1d443>] nmi_trigger_all_cpu_backtrace.cold.4+0x70/0xad lib/nmi_backtrace.c:85
 [<ffffffff810b7ca4>] arch_trigger_all_cpu_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 [<ffffffff8141c749>] trigger_all_cpu_backtrace include/linux/nmi.h:44 [inline]
 [<ffffffff8141c749>] check_hung_task kernel/hung_task.c:125 [inline]
 [<ffffffff8141c749>] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline]
 [<ffffffff8141c749>] watchdog.cold.1+0xd3/0xee kernel/hung_task.c:238
 [<ffffffff81192be8>] kthread+0x268/0x300 kernel/kthread.c:211
 [<ffffffff838c8915>] ret_from_fork+0x55/0x80 arch/x86/entry/entry_64.S:510
Code: b3 5f ff f6 c4 10 75 e2 44 89 e8 c1 e0 18 89 04 25 10 b3 5f ff 44 89 f2 09 da 80 cf 04 41 83 fe 02 0f 44 d3 89 14 25 00 b3 5f ff <41> f7 c4 00 02 00 00 75 1a 4c 89 e7 57 9d 0f 1f 44 00 00 e8 72 
NMI backtrace for cpu 1
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.4.145-g2241aa9 #14
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801d9a41800 task.stack: ffff8801d9a50000
RIP: 0010:[<ffffffff810ce336>]  [<ffffffff810ce336>] native_safe_halt+0x6/0x10 arch/x86/include/asm/irqflags.h:49
RSP: 0018:ffff8801d9a57da0  EFLAGS: 00000246
RAX: 0000000000000007 RBX: ffffffff84a078a8 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8801d9a420dc
RBP: ffff8801d9a57da0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000001 R14: fffffbfff0748adc R15: ffffffff84a078a8
FS:  0000000000000000(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f89bca92000 CR3: 00000000b14d9000 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8801d9a57dd8 ffffffff81025cd5 ffff8801d9a58000 0000000000000000
 0000000000000000 fffffbfff0748adc ffffffff84a078a8 ffff8801d9a57de8
 ffffffff81027be0 ffff8801d9a57e00 ffffffff8121de97 dffffc0000000000
Call Trace:
 [<ffffffff81025cd5>] arch_safe_halt arch/x86/include/asm/paravirt.h:117 [inline]
 [<ffffffff81025cd5>] default_idle+0x55/0x3c0 arch/x86/kernel/process.c:432
 [<ffffffff81027be0>] arch_cpu_idle+0x10/0x20 arch/x86/kernel/process.c:423
 [<ffffffff8121de97>] default_idle_call+0x57/0x70 kernel/sched/idle.c:93
 [<ffffffff8121e63f>] cpuidle_idle_call kernel/sched/idle.c:157 [inline]
 [<ffffffff8121e63f>] cpu_idle_loop kernel/sched/idle.c:253 [inline]
 [<ffffffff8121e63f>] cpu_startup_entry+0x6af/0x780 kernel/sched/idle.c:301
 [<ffffffff810abf79>] start_secondary+0x329/0x400 arch/x86/kernel/smpboot.c:245
Code: 00 00 00 00 00 55 48 89 e5 fa 5d c3 66 0f 1f 84 00 00 00 00 00 55 48 89 e5 fb 5d c3 66 0f 1f 84 00 00 00 00 00 55 48 89 e5 fb f4 <5d> c3 0f 1f 84 00 00 00 00 00 55 48 89 e5 f4 5d c3 66 0f 1f 84