binder: 25671:25675 IncRefs 0 refcount change on invalid ref 1 ret -22
binder: BINDER_SET_CONTEXT_MGR already set
binder: 25671:25681 IncRefs 0 refcount change on invalid ref 1 ret -22
binder: 25671:25678 ioctl 40046207 0 returned -16
INFO: task syz-executor4:25686 blocked for more than 120 seconds.
      Not tainted 4.9.87-g97d7f1c #54
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor4   D27600 25686  16948 0x00000004
 ffff8801b4eb8000 ffff8801cf19b480 ffff8801c9674a80 ffff8801cfdac800
 ffff8801db321b98 ffff8801b20f72c0 ffffffff838a5adb 0000000041b58ab3
 ffffffff84193c70 00ffffff8123c1a0 ffff8801db322468 ffff8801db322490
Call Trace:
 [<ffffffff838a707f>] schedule+0x7f/0x1b0 kernel/sched/core.c:3550
 [<ffffffff838b31dc>] schedule_timeout+0x56c/0x10b0 kernel/time/timer.c:1768
 [<ffffffff838a528e>] io_schedule_timeout+0x1be/0x390 kernel/sched/core.c:5172
 [<ffffffff816390fe>] io_schedule include/linux/sched.h:460 [inline]
 [<ffffffff816390fe>] dio_await_one fs/direct-io.c:461 [inline]
 [<ffffffff816390fe>] dio_await_completion fs/direct-io.c:515 [inline]
 [<ffffffff816390fe>] do_blockdev_direct_IO+0x481e/0x7ab0 fs/direct-io.c:1331
 [<ffffffff8163c435>] __blockdev_direct_IO+0xa5/0xd0 fs/direct-io.c:1360
 [<ffffffff8162b570>] blkdev_direct_IO+0xa0/0xd0 fs/block_dev.c:183
 [<ffffffff8143d2e3>] generic_file_read_iter+0x793/0x1ac0 mm/filemap.c:1952
 [<ffffffff8162c565>] blkdev_read_iter+0x105/0x170 fs/block_dev.c:1738
 [<ffffffff81610e04>] generic_file_splice_read+0x294/0x510 fs/splice.c:309
 [<ffffffff8160f5ba>] do_splice_to+0x10a/0x160 fs/splice.c:899
 [<ffffffff8160f85d>] splice_direct_to_actor+0x24d/0x800 fs/splice.c:971
 [<ffffffff8160ffb7>] do_splice_direct+0x1a7/0x270 fs/splice.c:1080
 [<ffffffff81572efb>] do_sendfile+0x54b/0xd30 fs/read_write.c:1393
 [<ffffffff81574e51>] SYSC_sendfile64 fs/read_write.c:1448 [inline]
 [<ffffffff81574e51>] SyS_sendfile64+0xd1/0x160 fs/read_write.c:1440
 [<ffffffff81006504>] do_syscall_64+0x1a4/0x490 arch/x86/entry/common.c:282
 [<ffffffff838b6b53>] 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: [<ffffffff81373315>] check_hung_uninterruptible_tasks kernel/hung_task.c:168 [inline]
 #0:  (rcu_read_lock){......}, at: [<ffffffff81373315>] watchdog+0x125/0xa70 kernel/hung_task.c:239
 #1:  (tasklist_lock){.+.+..}, at: [<ffffffff81238300>] debug_show_all_locks+0x70/0x280 kernel/locking/lockdep.c:4336
1 lock held by rsyslogd/3651:
 #0:  (&f->f_pos_lock){+.+.+.}, at: [<ffffffff815d3edf>] __fdget_pos+0x9f/0xc0 fs/file.c:781
2 locks held by getty/3779:
 #0:  (&tty->ldisc_sem){++++++}, at: [<ffffffff838b4d52>] ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:367
 #1:  (&ldata->atomic_read_lock){+.+.+.}, at: [<ffffffff8200af14>] n_tty_read+0x1f4/0x16c0 drivers/tty/n_tty.c:2133

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

NMI backtrace for cpu 0
CPU: 0 PID: 515 Comm: khungtaskd Not tainted 4.9.87-g97d7f1c #54
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d855fd00 ffffffff81d95a19 0000000000000000 0000000000000000
 0000000000000000 0000000000000001 ffffffff810bb230 ffff8801d855fd38
 ffffffff81da0b3d 0000000000000000 0000000000000000 ffff8801b28fcc18
Call Trace:
 [<ffffffff81d95a19>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d95a19>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81da0b3d>] nmi_cpu_backtrace+0xfd/0x120 lib/nmi_backtrace.c:99
 [<ffffffff81da0c77>] nmi_trigger_cpumask_backtrace+0x117/0x190 lib/nmi_backtrace.c:60
 [<ffffffff810bb324>] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37
 [<ffffffff813738e0>] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline]
 [<ffffffff813738e0>] check_hung_task kernel/hung_task.c:125 [inline]
 [<ffffffff813738e0>] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline]
 [<ffffffff813738e0>] watchdog+0x6f0/0xa70 kernel/hung_task.c:239
 [<ffffffff8119a92d>] kthread+0x26d/0x300 kernel/kthread.c:211
 [<ffffffff838b6cec>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:374
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1 skipped: idling at pc 0xffffffff838b57c6