IPVS: Creating netns size=2536 id=79
INFO: task syz-executor0:23305 blocked for more than 120 seconds.
      Not tainted 4.9.109-ga4230be #51
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor0   D29512 23305   3820 0x00000004
 ffff8801ccd29800 0000000000000000 ffff8801d7372a00 ffff8801d862c800
 ffff8801db321c18 ffff8801ce1b7890 ffffffff839e8a8d 1ffff10039c36f06
 ffffffff855802b0 0000000041b58ab3 00ffffff843c2288 ffff8801db3224e8
Call Trace:
 [<ffffffff839ea08f>] schedule+0x7f/0x1b0 kernel/sched/core.c:3557
 [<ffffffff839f64a1>] schedule_timeout+0x861/0xf70 kernel/time/timer.c:1768
 [<ffffffff839e826a>] io_schedule_timeout+0x1ba/0x390 kernel/sched/core.c:5180
 [<ffffffff839eb4d9>] io_schedule include/linux/sched.h:460 [inline]
 [<ffffffff839eb4d9>] bit_wait_io+0x19/0xa0 kernel/sched/wait.c:582
 [<ffffffff839ead7e>] __wait_on_bit_lock+0xce/0x1c0 kernel/sched/wait.c:421
 [<ffffffff8143451f>] __lock_page+0xff/0x160 mm/filemap.c:934
 [<ffffffff8143a2e9>] lock_page include/linux/pagemap.h:454 [inline]
 [<ffffffff8143a2e9>] pagecache_get_page+0x409/0x720 mm/filemap.c:1216
 [<ffffffff8146bbe6>] find_lock_page include/linux/pagemap.h:284 [inline]
 [<ffffffff8146bbe6>] truncate_inode_pages_range+0xca6/0x1290 mm/truncate.c:320
 [<ffffffff8163288d>] blkdev_fallocate+0x21d/0x440 fs/block_dev.c:1817
 [<ffffffff815686b9>] vfs_fallocate+0x359/0x600 fs/open.c:329
 [<ffffffff8156b5c3>] SYSC_fallocate fs/open.c:352 [inline]
 [<ffffffff8156b5c3>] SyS_fallocate+0x53/0x90 fs/open.c:346
 [<ffffffff81006316>] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282
 [<ffffffff839f9993>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb

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
2 locks held by getty/3774:
 #0:  (&tty->ldisc_sem){++++++}, at: [<ffffffff839f7b32>] ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:367
 #1:  (&ldata->atomic_read_lock){+.+.+.}, at: [<ffffffff8211fce2>] n_tty_read+0x202/0x16e0 drivers/tty/n_tty.c:2133
1 lock held by syz-executor0/23305:
 #0:  (sb_writers){.+.+.+}, at: [<ffffffff8156865b>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers){.+.+.+}, at: [<ffffffff8156865b>] vfs_fallocate+0x2fb/0x600 fs/open.c:328
1 lock held by syz-executor0/23334:
 #0:  (sb_writers){.+.+.+}, at: [<ffffffff8156865b>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers){.+.+.+}, at: [<ffffffff8156865b>] vfs_fallocate+0x2fb/0x600 fs/open.c:328

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

NMI backtrace for cpu 1
CPU: 1 PID: 519 Comm: khungtaskd Not tainted 4.9.109-ga4230be #51
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d911fd08 ffffffff81eb3e29 0000000000000000 0000000000000001
 0000000000000001 0000000000000001 ffffffff810b9580 ffff8801d911fd40
 ffffffff81ebf127 0000000000000001 0000000000000000 0000000000000003
Call Trace:
 [<ffffffff81eb3e29>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81eb3e29>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81ebf127>] nmi_cpu_backtrace.cold.2+0x48/0x87 lib/nmi_backtrace.c:99
 [<ffffffff81ebf0ba>] 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
 [<ffffffff839f9b5c>] 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 4.9.109-ga4230be #51
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffffffff84629800 task.stack: ffffffff84600000
RIP: 0010:[<ffffffff8122f110>] 
c [<ffffffff8122f110>] trace_hardirqs_off+0x0/0x10 kernel/locking/lockdep.c:2763
RSP: 0018:ffff8801db207de0  EFLAGS: 00000096
RAX: 0000000000000000 RBX: ffff8801db21a780 RCX: ffffffff84629800
RDX: 0000000000000100 RSI: ffffffff8129896b RDI: ffff8801db21a780
RBP: ffff8801db207df8 R08: ffffffff8462a0e8 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
R13: ffffffff81298770 R14: ffff8801c09d9800 R15: ffff8801db21a780
FS:  0000000000000000(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000007808e8 CR3: 00000001c9249000 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffffffff839f96d8
c ffff8801c09d9800
c ffff880199b87b50
c ffff8801db207f38
c
 ffffffff8129fa5f
c ffffffff843bdc9a
c ffffffff812c6ae0
c ffffed003b6434f7
c
 1ffff1003b640fce
c ffff880199b87b78
c ffff8801db21a7b8
c fffffbfff08c1200
c
Call Trace:
 [<ffffffff8129fa5f>] spin_lock_irq include/linux/spinlock.h:332 [inline]
 [<ffffffff8129fa5f>] expire_timers kernel/time/timer.c:1360 [inline]
 [<ffffffff8129fa5f>] __run_timers kernel/time/timer.c:1658 [inline]
 [<ffffffff8129fa5f>] run_timer_softirq+0x104f/0x1590 kernel/time/timer.c:1684
 [<ffffffff83a0057b>] __do_softirq+0x20b/0x937 kernel/softirq.c:284
 [<ffffffff8114b227>] invoke_softirq kernel/softirq.c:364 [inline]
 [<ffffffff8114b227>] irq_exit+0x147/0x190 kernel/softirq.c:405
 [<ffffffff839ff161>] exiting_irq arch/x86/include/asm/apic.h:659 [inline]
 [<ffffffff839ff161>] smp_apic_timer_interrupt+0x81/0xa0 arch/x86/kernel/apic/apic.c:960
 [<ffffffff839fb2f0>] apic_timer_interrupt+0xa0/0xb0 arch/x86/entry/entry_64.S:648
 <EOI> 
d [<ffffffff839f8596>] ? native_safe_halt+0x6/0x10 arch/x86/include/asm/irqflags.h:53
 [<ffffffff839f7bd5>] arch_safe_halt arch/x86/include/asm/paravirt.h:104 [inline]
 [<ffffffff839f7bd5>] default_idle+0x55/0x360 arch/x86/kernel/process.c:437
 [<ffffffff8106ad10>] arch_cpu_idle+0x10/0x20 arch/x86/kernel/process.c:428
 [<ffffffff839f89f5>] 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
 [<ffffffff839e585c>] rest_init+0x183/0x189 init/main.c:409
 [<ffffffff84c97943>] start_kernel+0x67e/0x6b2 init/main.c:664
 [<ffffffff84c9629a>] x86_64_start_reservations+0x29/0x2b arch/x86/kernel/head64.c:196
 [<ffffffff84c963db>] x86_64_start_kernel+0x13f/0x162 arch/x86/kernel/head64.c:177
Code: 
c67 
cca 
c30 
c00 
ce9 
c5f 
cff 
cff 
cff 
ce8 
cbd 
cc9 
c30 
c00 
ce9 
c13 
cff 
cff 
cff 
ce8 
c73 
cca 
c30 
c00 
ce9 
cda 
cfe 
cff 
cff 
ce8 
ca9 
cc9 
c30 
c00 
ceb 
c88 
c0f 
c1f 
c80 
c00 
c00 
c00 
c00 
c<55> 
c48 
c89 
ce5 
c48 
c8b 
c7d 
c08 
ce8 
c73 
cfd 
cff 
cff 
c5d 
cc3 
c90 
c48 
c81 
cff 
cb8 
c02 
c