binder: 7585:7587 unknown command -1285517236
binder: 7585:7587 ioctl c0306201 20fed000 returned -22
INFO: task syz-executor2:7579 blocked for more than 120 seconds.
      Not tainted 4.9.93-g2ba4887 #2
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor2   D27672  7579   3854 0x00000004
 ffff8801d5193000 0000000000000000 ffff8801b7c18540 ffffffff84429800
 ffff8801db221b98 ffff8801d43d7320 ffffffff838bebed 1ffff1003a87ae58
 ffffffff85317ef8 0000000041b58ab3 00ffffff841a45e0 ffff8801db222468
Call Trace:
 [<ffffffff838c01ef>] schedule+0x7f/0x1b0 kernel/sched/core.c:3556
 [<ffffffff838cc601>] schedule_timeout+0x861/0xf70 kernel/time/timer.c:1768
 [<ffffffff838be3ca>] io_schedule_timeout+0x1ba/0x390 kernel/sched/core.c:5178
 [<ffffffff8163fe3b>] io_schedule include/linux/sched.h:460 [inline]
 [<ffffffff8163fe3b>] dio_await_one fs/direct-io.c:461 [inline]
 [<ffffffff8163fe3b>] dio_await_completion fs/direct-io.c:515 [inline]
 [<ffffffff8163fe3b>] do_blockdev_direct_IO+0x2d5b/0x5a80 fs/direct-io.c:1331
 [<ffffffff81642c05>] __blockdev_direct_IO+0xa5/0xd0 fs/direct-io.c:1360
 [<ffffffff8162c7b0>] blkdev_direct_IO+0xa0/0xd0 fs/block_dev.c:183
 [<ffffffff8143bdf0>] generic_file_read_iter+0x660/0x1a90 mm/filemap.c:1952
 [<ffffffff8162f3b5>] blkdev_read_iter+0x105/0x170 fs/block_dev.c:1738
 [<ffffffff81611db9>] generic_file_splice_read+0x2c9/0x4f0 fs/splice.c:309
 [<ffffffff8161050c>] do_splice_to+0x10c/0x170 fs/splice.c:899
 [<ffffffff816107af>] splice_direct_to_actor+0x23f/0x7e0 fs/splice.c:971
 [<ffffffff81610ef3>] do_splice_direct+0x1a3/0x270 fs/splice.c:1080
 [<ffffffff81572570>] do_sendfile+0x4f0/0xc60 fs/read_write.c:1393
 [<ffffffff815745f1>] SYSC_sendfile64 fs/read_write.c:1448 [inline]
 [<ffffffff815745f1>] SyS_sendfile64+0xd1/0x160 fs/read_write.c:1440
 [<ffffffff81006316>] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282
 [<ffffffff838cfad3>] 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: [<ffffffff81363f1c>] check_hung_uninterruptible_tasks kernel/hung_task.c:168 [inline]
 #0:  (rcu_read_lock){......}, at: [<ffffffff81363f1c>] watchdog+0x11c/0xa20 kernel/hung_task.c:239
 #1:  (tasklist_lock){.+.+..}, at: [<ffffffff81423380>] debug_show_all_locks+0x79/0x218 kernel/locking/lockdep.c:4336
2 locks held by getty/3748:
 #0:  (&tty->ldisc_sem){++++++}, at: [<ffffffff838cdc92>] ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:367
 #1:  (&ldata->atomic_read_lock){+.+...}, at: [<ffffffff820061e2>] n_tty_read+0x202/0x16b0 drivers/tty/n_tty.c:2133

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

NMI backtrace for cpu 1
CPU: 1 PID: 515 Comm: khungtaskd Not tainted 4.9.93-g2ba4887 #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d8657d08 ffffffff81d9aa29 0000000000000000 0000000000000001
 0000000000000001 0000000000000001 ffffffff810b7d60 ffff8801d8657d40
 ffffffff81da5d57 0000000000000001 0000000000000000 0000000000000002
Call Trace:
 [<ffffffff81d9aa29>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d9aa29>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81da5d57>] nmi_cpu_backtrace.cold.2+0x48/0x87 lib/nmi_backtrace.c:99
 [<ffffffff81da5cea>] nmi_trigger_cpumask_backtrace+0x12a/0x14f lib/nmi_backtrace.c:60
 [<ffffffff810b7e64>] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37
 [<ffffffff813644b4>] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline]
 [<ffffffff813644b4>] check_hung_task kernel/hung_task.c:125 [inline]
 [<ffffffff813644b4>] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline]
 [<ffffffff813644b4>] watchdog+0x6b4/0xa20 kernel/hung_task.c:239
 [<ffffffff8119abed>] kthread+0x26d/0x300 kernel/kthread.c:211
 [<ffffffff838cfc9c>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.9.93-g2ba4887 #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffffffff84429800 task.stack: ffffffff84400000
RIP: 0010:[<ffffffff810c12bc>] 
c [<ffffffff810c12bc>] native_apic_mem_write+0xc/0x10 arch/x86/include/asm/apic.h:98
RSP: 0018:ffff8801db207fd0  EFLAGS: 00000046
RAX: ffffffff810c12b0 RBX: ffffffff84211840 RCX: 0000000000000000
RDX: 1ffffffff0842326 RSI: 0000000000000000 RDI: 00000000000000b0
RBP: ffff8801db207fd0 R08: 0000000000000001 R09: 0000000000000006
R10: ffffed0043fffa01 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff84a3a048 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff8f064f140 CR3: 00000001ce1e4000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8801db207fe8
c ffffffff838d4250
c ffffffff84a2aea8
c ffffffff84407dc0
c
 ffffffff838d1dd0
c ffffffff84407d18
c <EOI> 
c 0000000000000000
c ffffffff84a3a048
c
 0000000000000000
c 0000000000000000
c ffffffff84407dc0
c ffffffff84a2aea8
c
Call Trace:
 <IRQ> 
d [<ffffffff838d4250>] apic_eoi arch/x86/include/asm/apic.h:403 [inline]
 <IRQ> 
d [<ffffffff838d4250>] ack_APIC_irq arch/x86/include/asm/apic.h:447 [inline]
 <IRQ> 
d [<ffffffff838d4250>] smp_reschedule_interrupt+0x60/0x90 arch/x86/kernel/smp.c:268
 [<ffffffff838d1dd0>] reschedule_interrupt+0xa0/0xb0 arch/x86/entry/entry_64.S:671
 <EOI> 
d [<ffffffff838ce6f6>] ? native_safe_halt+0x6/0x10 arch/x86/include/asm/irqflags.h:53
 [<ffffffff838cdd35>] arch_safe_halt arch/x86/include/asm/paravirt.h:104 [inline]
 [<ffffffff838cdd35>] default_idle+0x55/0x360 arch/x86/kernel/process.c:295
 [<ffffffff81069fa0>] arch_cpu_idle+0x10/0x20 arch/x86/kernel/process.c:286
 [<ffffffff838ceb55>] default_idle_call+0x45/0x60 kernel/sched/idle.c:97
 [<ffffffff81220695>] cpuidle_idle_call kernel/sched/idle.c:155 [inline]
 [<ffffffff81220695>] cpu_idle_loop kernel/sched/idle.c:248 [inline]
 [<ffffffff81220695>] cpu_startup_entry+0x2b5/0x380 kernel/sched/idle.c:303
 [<ffffffff838bb9bc>] rest_init+0x183/0x189 init/main.c:409
 [<ffffffff84a73943>] start_kernel+0x67e/0x6b2 init/main.c:664
 [<ffffffff84a7229a>] x86_64_start_reservations+0x29/0x2b arch/x86/kernel/head64.c:196
 [<ffffffff84a723db>] x86_64_start_kernel+0x13f/0x162 arch/x86/kernel/head64.c:177
Code: 
c00 
c0f 
c1f 
c40 
c00 
c66 
c2e 
c0f 
c1f 
c84 
c00 
c00 
c00 
c00 
c00 
c55 
cbe 
c01 
c00 
c00 
c00 
c48 
c89 
ce5 
ce8 
c32 
c1a 
c1b 
c00 
c5d 
cc3 
c55 
c89 
cff 
c48 
c89 
ce5 
c89 
cb7 
c00 
cc0 
c5f 
cff 
c<5d> 
cc3 
c66 
c90 
c48 
cb8 
c00 
c00 
c00 
c00 
c00 
cfc 
cff 
cdf 
c55 
c48 
c89 
ce5 
c53 
c89 
cfb 
c