Buffer I/O error on dev loop0, logical block 3, lost async page write
INFO: task syz-executor2:11805 blocked for more than 120 seconds.
      Not tainted 4.4.113-g202e079 #1
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor2   D ffff8800b36872c0 26896 11805  11672 0x00000004
 ffff8800b36872c0 ffff8801d9456770 0000000000000024 ffff8801d9455f00
 ffffffff842bdba0 0000000000000000 ffff8801db31fdb8 ffff8801db31fde0
 ffff8801db31f4d8 ffff8801da3a97c0 ffff8801d9455f00 ffff8800b3687860
Call Trace:
 [<ffffffff83763a1a>] schedule+0x7a/0x1b0 kernel/sched/core.c:3351
 [<ffffffff8376ed31>] schedule_timeout+0x3a1/0x970 kernel/time/timer.c:1508
 [<ffffffff837619de>] io_schedule_timeout+0x1be/0x390 kernel/sched/core.c:4932
 [<ffffffff83764cdb>] io_schedule include/linux/sched.h:447 [inline]
 [<ffffffff83764cdb>] bit_wait_io+0x1b/0xc0 kernel/sched/wait.c:595
 [<ffffffff8376441c>] __wait_on_bit+0x8c/0x140 kernel/sched/wait.c:395
 [<ffffffff8141c3f5>] wait_on_page_bit+0x1e5/0x210 mm/filemap.c:758
 [<ffffffff8141c5e3>] wait_on_page_writeback include/linux/pagemap.h:530 [inline]
 [<ffffffff8141c5e3>] __filemap_fdatawait_range+0x1c3/0x2e0 mm/filemap.c:410
 [<ffffffff8141c725>] filemap_fdatawait_range+0x25/0x50 mm/filemap.c:440
 [<ffffffff814228f4>] filemap_write_and_wait_range+0x74/0xb0 mm/filemap.c:539
 [<ffffffff815cecd6>] blkdev_fsync+0x66/0xb0 fs/block_dev.c:355
 [<ffffffff815bbd7a>] vfs_fsync_range+0x10a/0x250 fs/sync.c:195
 [<ffffffff815d03f8>] generic_write_sync include/linux/fs.h:2497 [inline]
 [<ffffffff815d03f8>] blkdev_write_iter+0x398/0x490 fs/block_dev.c:1658
 [<ffffffff8151ba87>] vfs_iter_write+0x1c7/0x2d0 fs/read_write.c:364
 [<ffffffff815b709a>] iter_file_splice_write+0x58a/0xae0 fs/splice.c:1024
 [<ffffffff815b3a75>] do_splice_from fs/splice.c:1128 [inline]
 [<ffffffff815b3a75>] direct_splice_actor+0x125/0x180 fs/splice.c:1294
 [<ffffffff815b4d82>] splice_direct_to_actor+0x2d2/0x830 fs/splice.c:1247
 [<ffffffff815b5487>] do_splice_direct+0x1a7/0x270 fs/splice.c:1337
 [<ffffffff8151fbbc>] do_sendfile+0x54c/0xd30 fs/read_write.c:1227
 [<ffffffff81521c13>] SYSC_sendfile64 fs/read_write.c:1282 [inline]
 [<ffffffff81521c13>] SyS_sendfile64+0xc3/0x150 fs/read_write.c:1274
 [<ffffffff83771b5f>] entry_SYSCALL_64_fastpath+0x1c/0x98
no locks held by syz-executor2/11805.
Sending NMI to all CPUs:
NMI backtrace for cpu 0
CPU: 0 PID: 11848 Comm: getty Not tainted 4.4.113-g202e079 #1
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8800b1d70000 task.stack: ffff8800bac28000
RIP: 0010:[<ffffffff81035edb>]  [<ffffffff81035edb>] __save_stack_address arch/x86/kernel/stacktrace.c:32 [inline]
RIP: 0010:[<ffffffff81035edb>]  [<ffffffff81035edb>] save_stack_address+0x2b/0x30 arch/x86/kernel/stacktrace.c:37
RSP: 0018:ffff8800bac2f748  EFLAGS: 00000283
RAX: 0000000000000004 RBX: 0000000000000000 RCX: 0000000000000005
RDX: ffff8800bac2f868 RSI: ffffffff814a39c8 RDI: ffff8800bac2f850
RBP: ffff8800bac2f748 R08: ffff8800bac2f850 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8800bac2fad0
R13: ffffffffffff8000 R14: ffff8800bac2fad8 R15: ffffffff814a39c8
FS:  0000000000000000(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f10b4d45a30 CR3: 00000001d99d4000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8800bac2f7a0 ffffffff81017a0a ffff8800bac28000 ffff8800bac2fad0
 ffff8800bac2f850 ffffffff83810aa0 0000000000000000 ffffffff83810aa0
 00000000000166a0 ffff8800bac2f850 ffff8800bac2f7f0 ffff8800bac2f828
Call Trace:
 [<ffffffff81017a0a>] print_context_stack+0x9a/0xc0 arch/x86/kernel/dumpstack.c:109
 [<ffffffff81016b95>] dump_trace+0x145/0x350 arch/x86/kernel/dumpstack_64.c:243
 [<ffffffff81035df6>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff814fc0c3>] save_stack+0x43/0xd0 mm/kasan/kasan.c:512
 [<ffffffff814fc9e2>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff814fc9e2>] kasan_slab_free+0x72/0xc0 mm/kasan/kasan.c:589
 [<ffffffff814f9127>] slab_free_hook mm/slub.c:1383 [inline]
 [<ffffffff814f9127>] slab_free_freelist_hook mm/slub.c:1405 [inline]
 [<ffffffff814f9127>] slab_free mm/slub.c:2859 [inline]
 [<ffffffff814f9127>] kmem_cache_free+0xc7/0x320 mm/slub.c:2881
 [<ffffffff814a39c8>] ptlock_free+0x38/0x50 mm/memory.c:3910
 [<ffffffff810e8f17>] pgtable_pmd_page_dtor include/linux/mm.h:1635 [inline]
 [<ffffffff810e8f17>] ___pmd_free_tlb+0x87/0x110 arch/x86/mm/pgtable.c:74
 [<ffffffff814977f4>] __pmd_free_tlb arch/x86/include/asm/pgalloc.h:106 [inline]
 [<ffffffff814977f4>] free_pmd_range mm/memory.c:431 [inline]
 [<ffffffff814977f4>] free_pud_range mm/memory.c:449 [inline]
 [<ffffffff814977f4>] free_pgd_range+0x6e4/0x9a0 mm/memory.c:525
 [<ffffffff81497d20>] free_pgtables+0x270/0x330 mm/memory.c:557
 [<ffffffff814b3563>] exit_mmap+0x1e3/0x3a0 mm/mmap.c:2926
 [<ffffffff81123548>] __mmput kernel/fork.c:715 [inline]
 [<ffffffff81123548>] mmput+0xf8/0x2d0 kernel/fork.c:735
 [<ffffffff81132e64>] exit_mm kernel/exit.c:440 [inline]
 [<ffffffff81132e64>] do_exit+0x714/0x2a10 kernel/exit.c:742
 [<ffffffff81139418>] do_group_exit+0x108/0x320 kernel/exit.c:885
 [<ffffffff8113964d>] SYSC_exit_group kernel/exit.c:896 [inline]
 [<ffffffff8113964d>] SyS_exit_group+0x1d/0x20 kernel/exit.c:894
 [<ffffffff83771b5f>] entry_SYSCALL_64_fastpath+0x1c/0x98
Code: 55 85 d2 48 89 e5 74 0d 8b 47 10 85 c0 7e 08 83 e8 01 89 47 10 5d c3 8b 07 3b 47 04 73 f7 48 8b 57 08 8d 48 01 89 0f 48 89 34 c2 <5d> c3 0f 1f 00 48 89 f8 55 49 89 f1 31 c9 48 89 e5 31 d2 53 49 
NMI backtrace for cpu 1
CPU: 1 PID: 485 Comm: khungtaskd Not tainted 4.4.113-g202e079 #1
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8800bac32f80 task.stack: ffff8800bb370000
RIP: 0010:[<ffffffff810c3cf7>]  [<ffffffff810c3cf7>] native_apic_mem_write arch/x86/include/asm/apic.h:94 [inline]
RIP: 0010:[<ffffffff810c3cf7>]  [<ffffffff810c3cf7>] __default_send_IPI_dest_field arch/x86/include/asm/ipi.h:119 [inline]
RIP: 0010:[<ffffffff810c3cf7>]  [<ffffffff810c3cf7>] _flat_send_IPI_mask arch/x86/kernel/apic/apic_flat_64.c:61 [inline]
RIP: 0010:[<ffffffff810c3cf7>]  [<ffffffff810c3cf7>] flat_send_IPI_mask+0xf7/0x1a0 arch/x86/kernel/apic/apic_flat_64.c:69
RSP: 0018:ffff8800bb377cb8  EFLAGS: 00000046
RAX: 0000000003000000 RBX: 0000000000000c00 RCX: 0000000000000000
RDX: 0000000000000c00 RSI: 0000000000000000 RDI: ffffffffff5fb300
RBP: ffff8800bb377ce0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000246
R13: 0000000000000003 R14: ffffffff8426f2e0 R15: 0000000000000002
FS:  0000000000000000(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa5f5cfa000 CR3: 00000001d20d8000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffffffff8426f2e0 ffffffff847ef680 fffffbfff08fd984 dffffc0000000000
 ffff8801db31bca0 ffff8800bb377d00 ffffffff810b982b ffffffff839f6100
 0000000000000003 ffff8800bb377d60 ffffffff81d0d6f4 0000000000000000
Call Trace:
 [<ffffffff810b982b>] nmi_raise_cpu_backtrace+0x5b/0x70 arch/x86/kernel/apic/hw_nmi.c:33
 [<ffffffff81d0d6f4>] nmi_trigger_all_cpu_backtrace+0x4a4/0x550 lib/nmi_backtrace.c:85
 [<ffffffff810b98c4>] arch_trigger_all_cpu_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 [<ffffffff81367b6a>] trigger_all_cpu_backtrace include/linux/nmi.h:44 [inline]
 [<ffffffff81367b6a>] check_hung_task kernel/hung_task.c:125 [inline]
 [<ffffffff81367b6a>] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline]
 [<ffffffff81367b6a>] watchdog+0x6fa/0xae0 kernel/hung_task.c:238
 [<ffffffff811907d8>] kthread+0x268/0x300 kernel/kthread.c:211
 [<ffffffff83771f85>] ret_from_fork+0x55/0x80 arch/x86/entry/entry_64.S:506
Code: b3 5f ff f6 c4 10 75 e1 44 89 e8 c1 e0 18 89 04 25 10 b3 5f ff 44 89 fa 09 da 80 cf 04 41 83 ff 02 0f 44 d3 89 14 25 00 b3 5f ff <41> f7 c4 00 02 00 00 74 1a e8 8b 20 17 00 4c 89 e7 57 9d 0f 1f