binder: 10130:10149 ioctl 8903 20000040 returned -22
binder: 10130:10149 IncRefs 0 refcount change on invalid ref 3 ret -22
INFO: task syz-executor3:10151 blocked for more than 120 seconds.
      Not tainted 4.4.135-ge75204c #55
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor3   D ffff8800b67374e0 26488 10151   3913 0x00000004
 ffff8800b67374e0 0000000000000040 0000000000000001 1be72a00d9c9344f
 ffff8800b6737600 ffff8801db21fdb8 ffff8801db21fde0 ffff8801db21f4d8
 ffff8801db21f4c0 ffff8800b76a4800 ffff8800bace6000 0000000000000000
Call Trace:
 [<ffffffff838b474a>] schedule+0x7a/0x1b0 kernel/sched/core.c:3359
 [<ffffffff838bfb61>] schedule_timeout+0x481/0x8b0 kernel/time/timer.c:1515
 [<ffffffff838b260a>] io_schedule_timeout+0x1ba/0x390 kernel/sched/core.c:4941
 [<ffffffff838b599b>] io_schedule include/linux/sched.h:447 [inline]
 [<ffffffff838b599b>] bit_wait_io+0x1b/0xd0 kernel/sched/wait.c:595
 [<ffffffff838b5502>] __wait_on_bit_lock.part.4+0x92/0x140 kernel/sched/wait.c:434
 [<ffffffff838b55b9>] __wait_on_bit_lock+0x9/0x10 kernel/sched/wait.c:427
 [<ffffffff8141cd7d>] __lock_page+0x17d/0x1f0 mm/filemap.c:888
 [<ffffffff815b9a3b>] lock_page include/linux/pagemap.h:458 [inline]
 [<ffffffff815b9a3b>] __generic_file_splice_read+0x7eb/0xbb0 fs/splice.c:412
 [<ffffffff815b9ee2>] generic_file_splice_read+0xe2/0x1c0 fs/splice.c:542
 [<ffffffff815b6037>] do_splice_to+0xf7/0x140 fs/splice.c:1154
 [<ffffffff815b62c2>] splice_direct_to_actor+0x242/0x830 fs/splice.c:1226
 [<ffffffff815b6a53>] do_splice_direct+0x1a3/0x270 fs/splice.c:1337
 [<ffffffff815205f4>] do_sendfile+0x4e4/0xb80 fs/read_write.c:1227
 [<ffffffff815225e3>] SYSC_sendfile64 fs/read_write.c:1282 [inline]
 [<ffffffff815225e3>] SyS_sendfile64+0xc3/0x150 fs/read_write.c:1274
 [<ffffffff838c2765>] entry_SYSCALL_64_fastpath+0x22/0x9e
no locks held by syz-executor3/10151.
Sending NMI to all CPUs:
NMI backtrace for cpu 0
CPU: 0 PID: 492 Comm: khungtaskd Not tainted 4.4.135-ge75204c #55
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8800bace3000 task.stack: ffff8800bacf0000
RIP: 0010:[<ffffffff810bfeb6>]  [<ffffffff810bfeb6>] native_apic_mem_write arch/x86/include/asm/apic.h:94 [inline]
RIP: 0010:[<ffffffff810bfeb6>]  [<ffffffff810bfeb6>] __default_send_IPI_dest_field arch/x86/include/asm/ipi.h:119 [inline]
RIP: 0010:[<ffffffff810bfeb6>]  [<ffffffff810bfeb6>] _flat_send_IPI_mask arch/x86/kernel/apic/apic_flat_64.c:61 [inline]
RIP: 0010:[<ffffffff810bfeb6>]  [<ffffffff810bfeb6>] flat_send_IPI_mask+0xf6/0x1a0 arch/x86/kernel/apic/apic_flat_64.c:69
RSP: 0018:ffff8800bacf7cc8  EFLAGS: 00000046
RAX: 0000000003000000 RBX: 0000000000000c00 RCX: 0000000000000000
RDX: 0000000000000c00 RSI: 0000000000000000 RDI: ffffffffff5fb300
RBP: ffff8800bacf7cf0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000246
R13: 0000000000000003 R14: 0000000000000002 R15: ffffffff8446f7a0
FS:  0000000000000000(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0c71ce96a4 CR3: 00000000b5020000 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffffffff8446f7a0 ffffffff84a18e60 0000000000000007 fffffbfff0942c7c
 0000000000000040 ffff8800bacf7d10 ffffffff810b5e71 ffffffff83c0b560
 0000000000000003 ffff8800bacf7d68 ffffffff81e19d83 ffff8800bace6000
Call Trace:
 [<ffffffff810b5e71>] nmi_raise_cpu_backtrace+0x61/0x80 arch/x86/kernel/apic/hw_nmi.c:33
 [<ffffffff81e19d83>] nmi_trigger_all_cpu_backtrace.cold.4+0x70/0xad lib/nmi_backtrace.c:85
 [<ffffffff810b5f14>] arch_trigger_all_cpu_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 [<ffffffff8141a3d9>] trigger_all_cpu_backtrace include/linux/nmi.h:44 [inline]
 [<ffffffff8141a3d9>] check_hung_task kernel/hung_task.c:125 [inline]
 [<ffffffff8141a3d9>] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline]
 [<ffffffff8141a3d9>] watchdog.cold.1+0xd3/0xee kernel/hung_task.c:238
 [<ffffffff81190958>] kthread+0x268/0x300 kernel/kthread.c:211
 [<ffffffff838c2b95>] 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: 3699 Comm: rs:main Q:Reg Not tainted 4.4.135-ge75204c #55
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8800b36bc800 task.stack: ffff8800b3588000
RIP: 0033:[<0000000000421041>]  [<0000000000421041>] 0x421041
RSP: 002b:00007fc23f4d43b0  EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000001a11a38 RCX: 0000000000000002
RDX: 0000000000000001 RSI: 0000000001a16ea0 RDI: 000000000044ad88
RBP: 0000000000000000 R08: 00000000fffff815 R09: 0000000080000000
R10: 00000000fffff815 R11: 00007fc2408eb810 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000002 R15: 0000000000000040
FS:  00007fc23f4dd700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0c7add7000 CR3: 00000000b5020000 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400