INFO: task syz-executor7:4191 blocked for more than 120 seconds.
      Not tainted 4.9.110-g00a0bcb #7
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor7   D27976  4191   3858 0x20020004
 ffff8801a3851800 ffff8801c19bcfc0 ffff8801d44e64c0 ffff8801cc306000
 ffff8801db321c18 ffff8801c2f67310 ffffffff839e6ded 1ffff100385ece56
 ffffffff85542200 0000000041b58ab3 00ffffff843c30c8 ffff8801db3224e8
Call Trace:
 [<ffffffff839e83ef>] schedule+0x7f/0x1b0 kernel/sched/core.c:3557
 [<ffffffff839f4801>] schedule_timeout+0x861/0xf70 kernel/time/timer.c:1768
 [<ffffffff839e65ca>] io_schedule_timeout+0x1ba/0x390 kernel/sched/core.c:5180
 [<ffffffff8164308b>] io_schedule include/linux/sched.h:460 [inline]
 [<ffffffff8164308b>] dio_await_one fs/direct-io.c:461 [inline]
 [<ffffffff8164308b>] dio_await_completion fs/direct-io.c:515 [inline]
 [<ffffffff8164308b>] do_blockdev_direct_IO+0x2d5b/0x5a80 fs/direct-io.c:1331
 [<ffffffff81645e55>] __blockdev_direct_IO+0xa5/0xd0 fs/direct-io.c:1360
 [<ffffffff8162fa00>] blkdev_direct_IO+0xa0/0xd0 fs/block_dev.c:183
 [<ffffffff8143e740>] generic_file_read_iter+0x660/0x1a90 mm/filemap.c:1951
 [<ffffffff81632605>] blkdev_read_iter+0x105/0x170 fs/block_dev.c:1738
 [<ffffffff81615009>] generic_file_splice_read+0x2c9/0x4f0 fs/splice.c:309
 [<ffffffff8161375c>] do_splice_to+0x10c/0x170 fs/splice.c:899
 [<ffffffff816139ff>] splice_direct_to_actor+0x23f/0x7e0 fs/splice.c:971
 [<ffffffff81614143>] do_splice_direct+0x1a3/0x270 fs/splice.c:1080
 [<ffffffff81575530>] do_sendfile+0x4f0/0xc60 fs/read_write.c:1393
 [<ffffffff81577711>] C_SYSC_sendfile fs/read_write.c:1469 [inline]
 [<ffffffff81577711>] compat_SyS_sendfile+0xd1/0x160 fs/read_write.c:1458
 [<ffffffff81006da7>] do_syscall_32_irqs_on arch/x86/entry/common.c:325 [inline]
 [<ffffffff81006da7>] do_fast_syscall_32+0x2f7/0x870 arch/x86/entry/common.c:387
 [<ffffffff839f93d0>] entry_SYSENTER_compat+0x90/0xa2 arch/x86/entry/entry_64_compat.S:137

Showing all locks held in the system:
2 locks held by khungtaskd/519:
 #0:  (rcu_read_lock){......}, at: [<ffffffff8136662c>] check_hung_uninterruptible_tasks kernel/hung_task.c:168 [inline]
 #0:  (rcu_read_lock){......}, at: [<ffffffff8136662c>] watchdog+0x11c/0xa20 kernel/hung_task.c:239
 #1:  (tasklist_lock){.+.?..}, at: [<ffffffff81425cb7>] debug_show_all_locks+0x79/0x218 kernel/locking/lockdep.c:4336
1 lock held by rsyslogd/3674:
 #0:  (&f->f_pos_lock){+.+.+.}, at: [<ffffffff815d803c>] __fdget_pos+0xac/0xd0 fs/file.c:781
2 locks held by getty/3770:
 #0:  (&tty->ldisc_sem){++++++}, at: [<ffffffff839f5e92>] ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:367
 #1:  (&ldata->atomic_read_lock){+.+.+.}, at: [<ffffffff8211e1e2>] n_tty_read+0x202/0x16e0 drivers/tty/n_tty.c:2133

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

NMI backtrace for cpu 0
CPU: 0 PID: 519 Comm: khungtaskd Not tainted 4.9.110-g00a0bcb #7
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d9287d08 ffffffff81eb2329 0000000000000000 0000000000000000
 0000000000000000 0000000000000001 ffffffff810b9580 ffff8801d9287d40
 ffffffff81ebd627 0000000000000000 0000000000000000 0000000000000002
Call Trace:
 [<ffffffff81eb2329>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81eb2329>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81ebd627>] nmi_cpu_backtrace.cold.2+0x48/0x87 lib/nmi_backtrace.c:99
 [<ffffffff81ebd5ba>] nmi_trigger_cpumask_backtrace+0x12a/0x14f lib/nmi_backtrace.c:60
 [<ffffffff810b9684>] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37
 [<ffffffff81366bc4>] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline]
 [<ffffffff81366bc4>] check_hung_task kernel/hung_task.c:125 [inline]
 [<ffffffff81366bc4>] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline]
 [<ffffffff81366bc4>] watchdog+0x6b4/0xa20 kernel/hung_task.c:239
 [<ffffffff8119d04d>] kthread+0x26d/0x300 kernel/kthread.c:211
 [<ffffffff839f7e9c>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.9.110-g00a0bcb #7
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801d9a6b000 task.stack: ffff8801d9a80000
RIP: 0010:[<ffffffff812ccdd5>] 
c [<ffffffff812ccdd5>] tick_sched_timer+0xc5/0x120 kernel/time/tick-sched.c:1196
RSP: 0018:ffff8801db307dc8  EFLAGS: 00000046
RAX: dffffc0000000000 RBX: ffff8801db31cf00 RCX: 0000000000000000
RDX: 1ffffffff0b6625c RSI: ffffffff812ccdb9 RDI: ffffffff85b312e0
RBP: ffff8801db307de8 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000001 R12: ffff8801db31cf74
R13: 00000101265a754c R14: ffff8801d9a87ce8 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000022eb000 CR3: 00000001c51e9000 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8801db31cf00
c ffffffff812ccd10
c ffff8801db31c900
c dffffc0000000000
c
 ffff8801db307f20
c ffffffff812a4645
c ffff8801db307eb0
c ffff8801db307eb8
c
 7fab14f4cb923873
c 1ffff1003b660fcb
c ffff8801db31c960
c ffffed003b660fd7
c
Call Trace:
 [<ffffffff812a4645>] __run_hrtimer kernel/time/hrtimer.c:1255 [inline]
 [<ffffffff812a4645>] __hrtimer_run_queues+0x375/0xe50 kernel/time/hrtimer.c:1319
 [<ffffffff812a5b81>] hrtimer_interrupt+0x1b1/0x430 kernel/time/hrtimer.c:1353
 [<ffffffff810b1d34>] local_apic_timer_interrupt+0x74/0xa0 arch/x86/kernel/apic/apic.c:935
 [<ffffffff839fd49c>] smp_apic_timer_interrupt+0x7c/0xa0 arch/x86/kernel/apic/apic.c:959
 [<ffffffff839f9630>] apic_timer_interrupt+0xa0/0xb0 arch/x86/entry/entry_64.S:648
 <EOI> 
d [<ffffffff839f68f6>] ? native_safe_halt+0x6/0x10 arch/x86/include/asm/irqflags.h:53
 [<ffffffff839f5f35>] arch_safe_halt arch/x86/include/asm/paravirt.h:104 [inline]
 [<ffffffff839f5f35>] default_idle+0x55/0x360 arch/x86/kernel/process.c:437
 [<ffffffff8106ad10>] arch_cpu_idle+0x10/0x20 arch/x86/kernel/process.c:428
 [<ffffffff839f6d55>] default_idle_call+0x45/0x60 kernel/sched/idle.c:97
 [<ffffffff81223185>] cpuidle_idle_call kernel/sched/idle.c:155 [inline]
 [<ffffffff81223185>] cpu_idle_loop kernel/sched/idle.c:248 [inline]
 [<ffffffff81223185>] cpu_startup_entry+0x2b5/0x380 kernel/sched/idle.c:303
 [<ffffffff810ae958>] start_secondary+0x328/0x400 arch/x86/kernel/smpboot.c:257
Code: 
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c