FAT-fs (loop1): Filesystem has been set read-only
vlan0: renamed from team_slave_0
INFO: task syz-executor4:12127 blocked for more than 140 seconds.
      Not tainted 4.9.116-g0137ea2 #18
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor4   D28552 12127   9095 0x00000004
 ffff88019bb61800 ffff8801cf4aea00 ffff8801cf4aea00 ffff8801b7633000
 ffff8801db221c18 ffff8801c0ad7ac8 ffffffff839ead0d ffffffff81235647
 0000000000000000 ffff88019bb620c0 0000000600000007 ffff8801db2224e8
Call Trace:
 [<ffffffff839ec30f>] schedule+0x7f/0x1b0 kernel/sched/core.c:3553
 [<ffffffff839f7948>] __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:526 [inline]
 [<ffffffff839f7948>] rwsem_down_write_failed+0x598/0x990 kernel/locking/rwsem-xadd.c:555
 [<ffffffff81ee8987>] call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:105
 [<ffffffff8122c270>] __down_write arch/x86/include/asm/rwsem.h:125 [inline]
 [<ffffffff8122c270>] down_write_nested+0x60/0xa0 kernel/locking/rwsem.c:174
 [<ffffffff815aa18a>] inode_lock_nested include/linux/fs.h:801 [inline]
 [<ffffffff815aa18a>] filename_create+0x17a/0x490 fs/namei.c:3639
 [<ffffffff815ac60b>] user_path_create fs/namei.c:3697 [inline]
 [<ffffffff815ac60b>] SYSC_mkdirat fs/namei.c:3841 [inline]
 [<ffffffff815ac60b>] SyS_mkdirat+0xbb/0x260 fs/namei.c:3833
 [<ffffffff81006316>] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282
 [<ffffffff839fbc13>] 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: [<ffffffff8136677c>] check_hung_uninterruptible_tasks kernel/hung_task.c:168 [inline]
 #0:  (rcu_read_lock){......}, at: [<ffffffff8136677c>] watchdog+0x11c/0xa20 kernel/hung_task.c:239
 #1:  (tasklist_lock){.+.+..}, at: [<ffffffff81425e07>] debug_show_all_locks+0x79/0x218 kernel/locking/lockdep.c:4336
2 locks held by rs:main Q:Reg/3674:
 #0:  (&f->f_pos_lock){+.+.+.}, at: [<ffffffff815d835c>] __fdget_pos+0xac/0xd0 fs/file.c:781
 #1:  (sb_writers#3){.+.+.+}, at: [<ffffffff81572e3e>] file_start_write include/linux/fs.h:2640 [inline]
 #1:  (sb_writers#3){.+.+.+}, at: [<ffffffff81572e3e>] vfs_write+0x3ae/0x530 fs/read_write.c:556
1 lock held by rsyslogd/3676:
 #0:  (&f->f_pos_lock){+.+.+.}, at: [<ffffffff815d835c>] __fdget_pos+0xac/0xd0 fs/file.c:781
2 locks held by getty/3772:
 #0:  (&tty->ldisc_sem){++++++}, at: [<ffffffff839f9db2>] ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:367
 #1:  (&ldata->atomic_read_lock){+.+...}, at: [<ffffffff82120212>] n_tty_read+0x202/0x16e0 drivers/tty/n_tty.c:2142
2 locks held by syz-executor4/12127:
 #0:  (sb_writers#19){.+.+.+}, at: [<ffffffff815e0bff>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#19){.+.+.+}, at: [<ffffffff815e0bff>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#4/1){+.+.+.}, at: [<ffffffff815aa18a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#4/1){+.+.+.}, at: [<ffffffff815aa18a>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor4/12135:
 #0:  (&type->i_mutex_dir_key#5){+.+...}, at: [<ffffffff815e1a1c>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#5){+.+...}, at: [<ffffffff815e1a1c>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077

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

NMI backtrace for cpu 0
CPU: 0 PID: 519 Comm: khungtaskd Not tainted 4.9.116-g0137ea2 #18
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d8667d08 ffffffff81eb46a9 0000000000000000 0000000000000000
 0000000000000000 0000000000000001 ffffffff810b9bd0 ffff8801d8667d40
 ffffffff81ebf9a7 0000000000000000 0000000000000000 0000000000000003
Call Trace:
 [<ffffffff81eb46a9>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81eb46a9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81ebf9a7>] nmi_cpu_backtrace.cold.2+0x48/0x87 lib/nmi_backtrace.c:99
 [<ffffffff81ebf93a>] nmi_trigger_cpumask_backtrace+0x12a/0x14f lib/nmi_backtrace.c:60
 [<ffffffff810b9cd4>] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37
 [<ffffffff81366d14>] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline]
 [<ffffffff81366d14>] check_hung_task kernel/hung_task.c:125 [inline]
 [<ffffffff81366d14>] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline]
 [<ffffffff81366d14>] watchdog+0x6b4/0xa20 kernel/hung_task.c:239
 [<ffffffff8119d0ad>] kthread+0x26d/0x300 kernel/kthread.c:211
 [<ffffffff839fbddc>] 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: 12118 Comm: syz-executor4 Not tainted 4.9.116-g0137ea2 #18
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88019c62e000 task.stack: ffff88019b680000
RIP: 0010:[<ffffffff8123b0dd>] 
c [<ffffffff8123b0dd>] __lock_release kernel/locking/lockdep.c:3521 [inline]
RIP: 0010:[<ffffffff8123b0dd>] 
c [<ffffffff8123b0dd>] lock_release+0x19d/0xb80 kernel/locking/lockdep.c:3775
RSP: 0018:ffff88019b687778  EFLAGS: 00000097
RAX: 0000000000000004 RBX: ffff8801d00ba330 RCX: ffff88019b687960
RDX: 0000000000000004 RSI: 0000000000000001 RDI: ffffffff84870b00
RBP: ffff88019b687820 R08: 0000000000000296 R09: 0000000000000001
R10: 0000000000000000 R11: 1ffff100338c5d27 R12: ffff8801d00ba318
R13: ffff88019c62e000 R14: ffff8801d00ba318 R15: 0000000000000001
FS:  00007f24d3a5c700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000014a30e8 CR3: 00000001bf516000 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 0000000000000046
c ffff88019c62e000
c 0000000000000000
c 0000000000000000
c
 0000000000000000
c ffff88019b687818
c 0000000000000046
c 0000000000000000
c
 ffffffff812215bb
c ffff88019c62e8c0
c ffff880100000000
c 0000000000000046
c
Call Trace:
 [<ffffffff839fb2cf>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline]
 [<ffffffff839fb2cf>] _raw_spin_unlock_irqrestore+0x1f/0x70 kernel/locking/spinlock.c:191
 [<ffffffff81221729>] spin_unlock_irqrestore include/linux/spinlock.h:362 [inline]
 [<ffffffff81221729>] prepare_to_wait_event+0x1d9/0x450 kernel/sched/wait.c:238
 [<ffffffff81907a9e>] request_wait_answer+0x22e/0x6e0 fs/fuse/dev.c:459
 [<ffffffff819085a9>] __fuse_request_send+0x109/0x1b0 fs/fuse/dev.c:480
 [<ffffffff819086ad>] fuse_request_send+0x5d/0x70 fs/fuse/dev.c:493
 [<ffffffff81912904>] fuse_simple_request+0x2f4/0x660 fs/fuse/dev.c:551
 [<ffffffff8191aca3>] fuse_lookup_name+0x253/0x5d0 fs/fuse/dir.c:369
 [<ffffffff8191b10d>] fuse_lookup+0xed/0x3a0 fs/fuse/dir.c:406
 [<ffffffff81593fbc>] lookup_real fs/namei.c:1522 [inline]
 [<ffffffff81593fbc>] __lookup_hash+0x11c/0x190 fs/namei.c:1542
 [<ffffffff815aa1b6>] filename_create+0x1a6/0x490 fs/namei.c:3640
 [<ffffffff815ac60b>] user_path_create fs/namei.c:3697 [inline]
 [<ffffffff815ac60b>] SYSC_mkdirat fs/namei.c:3841 [inline]
 [<ffffffff815ac60b>] SyS_mkdirat+0xbb/0x260 fs/namei.c:3833
 [<ffffffff81006316>] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282
 [<ffffffff839fbc13>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Code: 
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