binder: undelivered TRANSACTION_ERROR: 29189
binder: undelivered TRANSACTION_COMPLETE
binder: undelivered TRANSACTION_ERROR: 29189
binder: undelivered TRANSACTION_ERROR: 29190
binder: undelivered TRANSACTION_ERROR: 29201
INFO: task syz-executor0:8106 blocked for more than 120 seconds.
      Not tainted 4.9.107-g42a730a #48
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor0   D27832  8106   3866 0x00000004
 ffff8801d94e9800 ffff8801d05039c0 ffff8801c0f979c0 ffff8801d8e7c800
 ffff8801db321c18 ffff88019959f8f0 ffffffff839e8c1d 0000000041b58ab3
 ffffffff843c2390 ffffffff812366a0 0000000000091240 ffff8801db3224e8
Call Trace:
 [<ffffffff839ea21f>] schedule+0x7f/0x1b0 kernel/sched/core.c:3557
 [<ffffffff839f6631>] schedule_timeout+0x861/0xf70 kernel/time/timer.c:1768
 [<ffffffff839e83fa>] io_schedule_timeout+0x1ba/0x390 kernel/sched/core.c:5180
 [<ffffffff839eb669>] io_schedule include/linux/sched.h:460 [inline]
 [<ffffffff839eb669>] bit_wait_io+0x19/0xa0 kernel/sched/wait.c:582
 [<ffffffff839eaf0e>] __wait_on_bit_lock+0xce/0x1c0 kernel/sched/wait.c:421
 [<ffffffff81434a2f>] __lock_page+0xff/0x160 mm/filemap.c:934
 [<ffffffff8146bc68>] lock_page include/linux/pagemap.h:454 [inline]
 [<ffffffff8146bc68>] truncate_inode_pages_range+0x818/0x1290 mm/truncate.c:373
 [<ffffffff81632d0d>] blkdev_fallocate+0x21d/0x440 fs/block_dev.c:1817
 [<ffffffff81568b39>] vfs_fallocate+0x359/0x600 fs/open.c:329
 [<ffffffff8156ba43>] SYSC_fallocate fs/open.c:352 [inline]
 [<ffffffff8156ba43>] SyS_fallocate+0x53/0x90 fs/open.c:346
 [<ffffffff81006316>] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282
 [<ffffffff839f9b13>] 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: [<ffffffff81366b6c>] check_hung_uninterruptible_tasks kernel/hung_task.c:168 [inline]
 #0:  (rcu_read_lock){......}, at: [<ffffffff81366b6c>] watchdog+0x11c/0xa20 kernel/hung_task.c:239
 #1:  (tasklist_lock){.+.+..}, at: [<ffffffff814261d0>] debug_show_all_locks+0x79/0x218 kernel/locking/lockdep.c:4336
1 lock held by rsyslogd/3676:
 #0:  (&f->f_pos_lock){+.+.+.}, at: [<ffffffff815d84bc>] __fdget_pos+0xac/0xd0 fs/file.c:781
2 locks held by getty/3772:
 #0:  (&tty->ldisc_sem){++++++}, at: [<ffffffff839f7cc2>] ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:367
 #1:  (&ldata->atomic_read_lock){+.+...}, at: [<ffffffff82120162>] n_tty_read+0x202/0x16e0 drivers/tty/n_tty.c:2133
1 lock held by syz-executor0/8106:
 #0:  (sb_writers){.+.+.+}, at: [<ffffffff81568adb>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers){.+.+.+}, at: [<ffffffff81568adb>] vfs_fallocate+0x2fb/0x600 fs/open.c:328
1 lock held by syz-executor0/8121:
 #0:  (sb_writers){.+.+.+}, at: [<ffffffff81568adb>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers){.+.+.+}, at: [<ffffffff81568adb>] vfs_fallocate+0x2fb/0x600 fs/open.c:328

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

NMI backtrace for cpu 1
CPU: 1 PID: 519 Comm: khungtaskd Not tainted 4.9.107-g42a730a #48
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d901fd08 ffffffff81eb42a9 0000000000000000 0000000000000001
 0000000000000001 0000000000000001 ffffffff810b96a0 ffff8801d901fd40
 ffffffff81ebf5a7 0000000000000001 0000000000000000 0000000000000003
Call Trace:
 [<ffffffff81eb42a9>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81eb42a9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81ebf5a7>] nmi_cpu_backtrace.cold.2+0x48/0x87 lib/nmi_backtrace.c:99
 [<ffffffff81ebf53a>] nmi_trigger_cpumask_backtrace+0x12a/0x14f lib/nmi_backtrace.c:60
 [<ffffffff810b97a4>] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37
 [<ffffffff81367104>] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline]
 [<ffffffff81367104>] check_hung_task kernel/hung_task.c:125 [inline]
 [<ffffffff81367104>] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline]
 [<ffffffff81367104>] watchdog+0x6b4/0xa20 kernel/hung_task.c:239
 [<ffffffff8119d04d>] kthread+0x26d/0x300 kernel/kthread.c:211
 [<ffffffff839f9cdc>] 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: 3674 Comm: rs:main Q:Reg Not tainted 4.9.107-g42a730a #48
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801c44ce000 task.stack: ffff8801c3b10000
RIP: 0010:[<ffffffff8127c2f7>] 
c [<ffffffff8127c2f7>] debug_lockdep_rcu_enabled.part.2+0x37/0x60 kernel/rcu/update.c:265
RSP: 0018:ffff8801c3b17320  EFLAGS: 00000202
RAX: 0000000000000007 RBX: ffff8801c44ce000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff846def60 RDI: ffff8801c44ce8c4
RBP: ffff8801c3b17328 R08: ffff8801c44ce988 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffffffff83cce580 R14: 0000000000000568 R15: ffff8801d5d91140
FS:  00007f7f493bf700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0dd2e50140 CR3: 00000001d309f000 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8801c44ce000
c ffff8801c3b17338
c ffffffff8127c397
c ffff8801c3b17370
c
 ffffffff811bb361
c ffff8801c44ce000
c ffffffff83cce580
c 0000000000000568
c
 0000000000000000
c ffff8801d5d91140
c ffff8801c3b173b0
c ffffffff811bb625
c
Call Trace:
 [<ffffffff8127c397>] debug_lockdep_rcu_enabled+0x77/0x90 kernel/rcu/update.c:264
 [<ffffffff811bb361>] ___might_sleep+0x31/0x260 kernel/sched/core.c:7958
 [<ffffffff811bb625>] __might_sleep+0x95/0x1a0 kernel/sched/core.c:7949
 [<ffffffff81625532>] __getblk_gfp+0x52/0x710 fs/buffer.c:1384
 [<ffffffff8173b034>] sb_getblk include/linux/buffer_head.h:318 [inline]
 [<ffffffff8173b034>] __ext4_get_inode_loc+0x3c4/0xf70 fs/ext4/inode.c:4319
 [<ffffffff8174f5c7>] ext4_get_inode_loc fs/ext4/inode.c:4432 [inline]
 [<ffffffff8174f5c7>] ext4_reserve_inode_write+0x57/0x180 fs/ext4/inode.c:5498
 [<ffffffff8177e92b>] ext4_orphan_del+0x20b/0x7b0 fs/ext4/namei.c:2822
 [<ffffffff81754e7f>] ext4_truncate+0xbcf/0x12c0 fs/ext4/inode.c:4277
 [<ffffffff81756e5b>] ext4_truncate_failed_write fs/ext4/truncate.h:15 [inline]
 [<ffffffff81756e5b>] ext4_da_write_begin+0x4eb/0x1020 fs/ext4/inode.c:3015
 [<ffffffff814361a1>] generic_perform_write+0x301/0x510 mm/filemap.c:2740
 [<ffffffff8143dc32>] __generic_file_write_iter+0x352/0x540 mm/filemap.c:2865
 [<ffffffff8172d3b3>] ext4_file_write_iter+0x463/0xd90 fs/ext4/file.c:165
 [<ffffffff8156efe0>] new_sync_write fs/read_write.c:496 [inline]
 [<ffffffff8156efe0>] __vfs_write+0x3e0/0x580 fs/read_write.c:509
 [<ffffffff81572dd7>] vfs_write+0x187/0x530 fs/read_write.c:557
 [<ffffffff81576c09>] SYSC_write fs/read_write.c:604 [inline]
 [<ffffffff81576c09>] SyS_write+0xd9/0x1c0 fs/read_write.c:596
 [<ffffffff81006316>] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282
 [<ffffffff839f9b13>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Code: 
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c