INFO: task syz-executor204:3955 blocked for more than 140 seconds.
      Not tainted 4.9.113-g47bbcd6 #10
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor204 D28368  3955   3931 0x00000000
 ffff8801d4c61800 0000000000000000 ffff8801d72d0a80 ffff8801d9a6b000
 ffff8801db321c18 ffff8801d536f5d8 ffffffff839e909d ffffffff81235647
 0000000000000000 ffff8801d4c620c0 0000000600000007 ffff8801db3224e8
Call Trace:
 [<ffffffff839ea69f>] schedule+0x7f/0x1b0 kernel/sched/core.c:3553
 [<ffffffff839f5cd8>] __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:526 [inline]
 [<ffffffff839f5cd8>] rwsem_down_write_failed+0x598/0x990 kernel/locking/rwsem-xadd.c:555
 [<ffffffff81ee7587>] call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:105
 [<ffffffff839f3aac>] __down_write arch/x86/include/asm/rwsem.h:125 [inline]
 [<ffffffff839f3aac>] down_write+0x5c/0xa0 kernel/locking/rwsem.c:54
 [<ffffffff8191bc0e>] inode_lock include/linux/fs.h:766 [inline]
 [<ffffffff8191bc0e>] fuse_reverse_inval_entry+0xae/0x670 fs/fuse/dir.c:1011
 [<ffffffff8190d63e>] fuse_notify_delete fs/fuse/dev.c:1536 [inline]
 [<ffffffff8190d63e>] fuse_notify fs/fuse/dev.c:1768 [inline]
 [<ffffffff8190d63e>] fuse_dev_do_write+0x98e/0x20a0 fs/fuse/dev.c:1843
 [<ffffffff8190fa8b>] fuse_dev_write+0x14b/0x1e0 fs/fuse/dev.c:1929
 [<ffffffff8156ecb0>] new_sync_write fs/read_write.c:496 [inline]
 [<ffffffff8156ecb0>] __vfs_write+0x3e0/0x580 fs/read_write.c:509
 [<ffffffff81572aa7>] vfs_write+0x187/0x530 fs/read_write.c:557
 [<ffffffff815768d9>] SYSC_write fs/read_write.c:604 [inline]
 [<ffffffff815768d9>] SyS_write+0xd9/0x1c0 fs/read_write.c:596
 [<ffffffff81006316>] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282
 [<ffffffff839f9f93>] 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: [<ffffffff8136675c>] check_hung_uninterruptible_tasks kernel/hung_task.c:168 [inline]
 #0:  (rcu_read_lock){......}, at: [<ffffffff8136675c>] watchdog+0x11c/0xa20 kernel/hung_task.c:239
 #1:  (tasklist_lock){.+.+..}, at: [<ffffffff81425de7>] debug_show_all_locks+0x79/0x218 kernel/locking/lockdep.c:4336
2 locks held by getty/3771:
 #0:  (&tty->ldisc_sem){++++++}, at: [<ffffffff839f8142>] ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:367
 #1:  (&ldata->atomic_read_lock){+.+...}, at: [<ffffffff8211ee22>] n_tty_read+0x202/0x16e0 drivers/tty/n_tty.c:2142
3 locks held by syz-executor204/3947:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
 #2:  (&fi->mutex){+.+.+.}, at: [<ffffffff81938782>] fuse_lock_inode+0xa2/0xd0 fs/fuse/inode.c:362
2 locks held by syz-executor204/3955:
 #0:  (&fc->killsb){.+.+..}, at: [<ffffffff8190d5e9>] fuse_notify_inval_entry fs/fuse/dev.c:1483 [inline]
 #0:  (&fc->killsb){.+.+..}, at: [<ffffffff8190d5e9>] fuse_notify fs/fuse/dev.c:1759 [inline]
 #0:  (&fc->killsb){.+.+..}, at: [<ffffffff8190d5e9>] fuse_dev_do_write+0x939/0x20a0 fs/fuse/dev.c:1843
 #1:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff8191bc0e>] inode_lock include/linux/fs.h:766 [inline]
 #1:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff8191bc0e>] fuse_reverse_inval_entry+0xae/0x670 fs/fuse/dir.c:1011
2 locks held by syz-executor204/3970:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
2 locks held by syz-executor204/3971:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor204/3972:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor204/3987:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor204/3990:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor204/4004:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor204/4008:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor204/4020:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor204/4024:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor204/4036:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor204/4040:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor204/4052:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor204/4057:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor204/4068:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
3 locks held by syz-executor204/3946:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
 #2:  (&fi->mutex){+.+.+.}, at: [<ffffffff81938782>] fuse_lock_inode+0xa2/0xd0 fs/fuse/inode.c:362
2 locks held by syz-executor204/3954:
 #0:  (&fc->killsb){.+.+..}, at: [<ffffffff8190d5e9>] fuse_notify_inval_entry fs/fuse/dev.c:1483 [inline]
 #0:  (&fc->killsb){.+.+..}, at: [<ffffffff8190d5e9>] fuse_notify fs/fuse/dev.c:1759 [inline]
 #0:  (&fc->killsb){.+.+..}, at: [<ffffffff8190d5e9>] fuse_dev_do_write+0x939/0x20a0 fs/fuse/dev.c:1843
 #1:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff8191bc0e>] inode_lock include/linux/fs.h:766 [inline]
 #1:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff8191bc0e>] fuse_reverse_inval_entry+0xae/0x670 fs/fuse/dir.c:1011
2 locks held by syz-executor204/3967:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor204/3968:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor204/3978:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor204/3985:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor204/3994:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor204/4001:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor204/4011:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor204/4017:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor204/4027:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor204/4033:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor204/4043:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor204/4051:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor204/4060:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor204/4067:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
3 locks held by syz-executor204/3945:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
 #2:  (&fi->mutex){+.+.+.}, at: [<ffffffff81938782>] fuse_lock_inode+0xa2/0xd0 fs/fuse/inode.c:362
2 locks held by syz-executor204/3949:
 #0:  (&fc->killsb){.+.+..}, at: [<ffffffff8190d5e9>] fuse_notify_inval_entry fs/fuse/dev.c:1483 [inline]
 #0:  (&fc->killsb){.+.+..}, at: [<ffffffff8190d5e9>] fuse_notify fs/fuse/dev.c:1759 [inline]
 #0:  (&fc->killsb){.+.+..}, at: [<ffffffff8190d5e9>] fuse_dev_do_write+0x939/0x20a0 fs/fuse/dev.c:1843
 #1:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff8191bc0e>] inode_lock include/linux/fs.h:766 [inline]
 #1:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff8191bc0e>] fuse_reverse_inval_entry+0xae/0x670 fs/fuse/dir.c:1011
2 locks held by syz-executor204/3959:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor204/3960:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor204/3974:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
2 locks held by syz-executor204/3981:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor204/3989:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor204/3998:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor204/4006:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor204/4015:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor204/4022:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor204/4032:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
2 locks held by syz-executor204/4038:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor204/4046:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor204/4056:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor204/4062:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
3 locks held by syz-executor204/3944:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
 #2:  (&fi->mutex){+.+.+.}, at: [<ffffffff81938782>] fuse_lock_inode+0xa2/0xd0 fs/fuse/inode.c:362
2 locks held by syz-executor204/3953:
 #0:  (&fc->killsb){.+.+..}, at: [<ffffffff8190d5e9>] fuse_notify_inval_entry fs/fuse/dev.c:1483 [inline]
 #0:  (&fc->killsb){.+.+..}, at: [<ffffffff8190d5e9>] fuse_notify fs/fuse/dev.c:1759 [inline]
 #0:  (&fc->killsb){.+.+..}, at: [<ffffffff8190d5e9>] fuse_dev_do_write+0x939/0x20a0 fs/fuse/dev.c:1843
 #1:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff8191bc0e>] inode_lock include/linux/fs.h:766 [inline]
 #1:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff8191bc0e>] fuse_reverse_inval_entry+0xae/0x670 fs/fuse/dir.c:1011
2 locks held by syz-executor204/3966:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor204/3969:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor204/3979:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor204/3986:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor204/3995:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor204/4002:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor204/4012:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor204/4018:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor204/4028:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor204/4034:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor204/4044:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor204/4050:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor204/4059:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor204/4066:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
3 locks held by syz-executor204/3943:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
 #2:  (&fi->mutex){+.+.+.}, at: [<ffffffff81938782>] fuse_lock_inode+0xa2/0xd0 fs/fuse/inode.c:362
2 locks held by syz-executor204/3951:
 #0:  (&fc->killsb){.+.+..}, at: [<ffffffff8190d5e9>] fuse_notify_inval_entry fs/fuse/dev.c:1483 [inline]
 #0:  (&fc->killsb){.+.+..}, at: [<ffffffff8190d5e9>] fuse_notify fs/fuse/dev.c:1759 [inline]
 #0:  (&fc->killsb){.+.+..}, at: [<ffffffff8190d5e9>] fuse_dev_do_write+0x939/0x20a0 fs/fuse/dev.c:1843
 #1:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff8191bc0e>] inode_lock include/linux/fs.h:766 [inline]
 #1:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff8191bc0e>] fuse_reverse_inval_entry+0xae/0x670 fs/fuse/dir.c:1011
2 locks held by syz-executor204/3962:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor204/3963:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor204/3976:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor204/3983:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor204/3992:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
2 locks held by syz-executor204/3999:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor204/4007:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor204/4019:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor204/4023:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor204/4035:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
2 locks held by syz-executor204/4039:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor204/4047:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor204/4058:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor204/4063:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
3 locks held by syz-executor204/3941:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
 #2:  (&fi->mutex){+.+.+.}, at: [<ffffffff81938782>] fuse_lock_inode+0xa2/0xd0 fs/fuse/inode.c:362
2 locks held by syz-executor204/3950:
 #0:  (&fc->killsb){.+.+..}, at: [<ffffffff8190d5e9>] fuse_notify_inval_entry fs/fuse/dev.c:1483 [inline]
 #0:  (&fc->killsb){.+.+..}, at: [<ffffffff8190d5e9>] fuse_notify fs/fuse/dev.c:1759 [inline]
 #0:  (&fc->killsb){.+.+..}, at: [<ffffffff8190d5e9>] fuse_dev_do_write+0x939/0x20a0 fs/fuse/dev.c:1843
 #1:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff8191bc0e>] inode_lock include/linux/fs.h:766 [inline]
 #1:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff8191bc0e>] fuse_reverse_inval_entry+0xae/0x670 fs/fuse/dir.c:1011
2 locks held by syz-executor204/3958:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor204/3961:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor204/3975:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor204/3982:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor204/3991:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor204/3996:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor204/4009:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor204/4013:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor204/4025:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor204/4029:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor204/4041:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
2 locks held by syz-executor204/4048:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor204/4053:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor204/4064:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
3 locks held by syz-executor204/3940:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
 #2:  (&fi->mutex){+.+.+.}, at: [<ffffffff81938782>] fuse_lock_inode+0xa2/0xd0 fs/fuse/inode.c:362
2 locks held by syz-executor204/3948:
 #0:  (&fc->killsb){.+.+..}, at: [<ffffffff8190d5e9>] fuse_notify_inval_entry fs/fuse/dev.c:1483 [inline]
 #0:  (&fc->killsb){.+.+..}, at: [<ffffffff8190d5e9>] fuse_notify fs/fuse/dev.c:1759 [inline]
 #0:  (&fc->killsb){.+.+..}, at: [<ffffffff8190d5e9>] fuse_dev_do_write+0x939/0x20a0 fs/fuse/dev.c:1843
 #1:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff8191bc0e>] inode_lock include/linux/fs.h:766 [inline]
 #1:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff8191bc0e>] fuse_reverse_inval_entry+0xae/0x670 fs/fuse/dir.c:1011
2 locks held by syz-executor204/3956:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor204/3957:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor204/3973:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
2 locks held by syz-executor204/3980:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor204/3988:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor204/3997:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor204/4005:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor204/4014:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor204/4021:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor204/4030:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
2 locks held by syz-executor204/4037:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor204/4045:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor204/4054:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor204/4061:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
3 locks held by syz-executor204/3942:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
 #2:  (&fi->mutex){+.+.+.}, at: [<ffffffff81938782>] fuse_lock_inode+0xa2/0xd0 fs/fuse/inode.c:362
2 locks held by syz-executor204/3952:
 #0:  (&fc->killsb){.+.+..}, at: [<ffffffff8190d5e9>] fuse_notify_inval_entry fs/fuse/dev.c:1483 [inline]
 #0:  (&fc->killsb){.+.+..}, at: [<ffffffff8190d5e9>] fuse_notify fs/fuse/dev.c:1759 [inline]
 #0:  (&fc->killsb){.+.+..}, at: [<ffffffff8190d5e9>] fuse_dev_do_write+0x939/0x20a0 fs/fuse/dev.c:1843
 #1:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff8191bc0e>] inode_lock include/linux/fs.h:766 [inline]
 #1:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff8191bc0e>] fuse_reverse_inval_entry+0xae/0x670 fs/fuse/dir.c:1011
2 locks held by syz-executor204/3964:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor204/3965:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor204/3977:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor204/3984:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor204/3993:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor204/4000:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor204/4010:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor204/4016:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor204/4026:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor204/4031:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
2 locks held by syz-executor204/4042:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
2 locks held by syz-executor204/4049:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff815e0a8f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] inode_lock_nested include/linux/fs.h:801 [inline]
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff815aa01a>] filename_create+0x17a/0x490 fs/namei.c:3639
1 lock held by syz-executor204/4055:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077
1 lock held by syz-executor204/4065:
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&type->i_mutex_dir_key#4){+.+...}, at: [<ffffffff815e18ac>] lock_mount+0x8c/0x2c0 fs/namespace.c:2077

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

NMI backtrace for cpu 1
CPU: 1 PID: 519 Comm: khungtaskd Not tainted 4.9.113-g47bbcd6 #10
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d853fd08 ffffffff81eb32a9 0000000000000000 0000000000000001
 0000000000000001 0000000000000001 ffffffff810b9bd0 ffff8801d853fd40
 ffffffff81ebe5a7 0000000000000001 0000000000000000 0000000000000003
Call Trace:
 [<ffffffff81eb32a9>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81eb32a9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81ebe5a7>] nmi_cpu_backtrace.cold.2+0x48/0x87 lib/nmi_backtrace.c:99
 [<ffffffff81ebe53a>] 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
 [<ffffffff81366cf4>] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline]
 [<ffffffff81366cf4>] check_hung_task kernel/hung_task.c:125 [inline]
 [<ffffffff81366cf4>] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline]
 [<ffffffff81366cf4>] watchdog+0x6b4/0xa20 kernel/hung_task.c:239
 [<ffffffff8119d0ad>] kthread+0x26d/0x300 kernel/kthread.c:211
 [<ffffffff839fa15c>] 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: 3936 Comm: syz-executor204 Not tainted 4.9.113-g47bbcd6 #10
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801d4c66000 task.stack: ffff8801c70e8000
RIP: 0010:[<ffffffff8123aba1>] 
c [<ffffffff8123aba1>] lock_acquire+0x41/0x3e0 kernel/locking/lockdep.c:3748
RSP: 0018:ffff8801c70ef9c0  EFLAGS: 00000086
RAX: dffffc0000000000 RBX: ffff8801d4c66000 RCX: 0000000000000000
RDX: ffff8801d4c668c4 RSI: 0000000000000000 RDI: ffff8801d4c668c4
RBP: ffff8801c70efa28 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801db221c18
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  00000000009c4880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5389531000 CR3: 00000001c4185000 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 000000003a98cd18
c fffffbfff098bfa8
c ffff8801d9913f80
c ffff8801d688e3d8
c
 ffffffffffffffff
c ffffffffffffffff
c ffff8801d9913ea0
c 00000001c70efa38
c
 ffff8801db221c00
c ffff8801db221c00
c ffff8801d688e810
c ffff8801d688e000
c
Call Trace:
 [<ffffffff839f9336>] __raw_spin_lock include/linux/spinlock_api_smp.h:144 [inline]
 [<ffffffff839f9336>] _raw_spin_lock+0x36/0x50 kernel/locking/spinlock.c:151
 [<ffffffff811cee1f>] ttwu_queue kernel/sched/core.c:1915 [inline]
 [<ffffffff811cee1f>] try_to_wake_up+0x73f/0xec0 kernel/sched/core.c:2130
 [<ffffffff811cf6d0>] default_wake_function+0x30/0x50 kernel/sched/core.c:3722
 [<ffffffff812219b3>] autoremove_wake_function+0x13/0x90 kernel/sched/wait.c:281
 [<ffffffff812206f6>] __wake_up_common+0xb6/0x150 kernel/sched/wait.c:73
 [<ffffffff81220850>] __wake_up_sync_key+0x40/0x60 kernel/sched/wait.c:145
 [<ffffffff8158d907>] pipe_write+0x967/0xd60 fs/pipe.c:481
 [<ffffffff8156ecb0>] new_sync_write fs/read_write.c:496 [inline]
 [<ffffffff8156ecb0>] __vfs_write+0x3e0/0x580 fs/read_write.c:509
 [<ffffffff81572aa7>] vfs_write+0x187/0x530 fs/read_write.c:557
 [<ffffffff815768d9>] SYSC_write fs/read_write.c:604 [inline]
 [<ffffffff815768d9>] SyS_write+0xd9/0x1c0 fs/read_write.c:596
 [<ffffffff81006316>] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282
 [<ffffffff839f9f93>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Code: 
c41 
c56 
c41 
c89 
cd6 
c41 
c55 
c41 
c89 
cf5 
c41 
c54 
c49 
c89 
cfc 
c53 
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c48 
c8b 
c1c 
c25 
cc0 
c7d 
c01 
c00 
c48 
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cc4 
c08 
c00 
c00 
c48 
c83 
cec 
c40 
c44 
c89 
c45 
cd4 
c48 
c89 
cfa 
c<48> 
cc1 
cea 
c03 
c0f 
cb6 
c14 
c02 
c48 
c89 
cf8 
c83 
ce0 
c07 
c83 
cc0 
c03 
c38 
cd0 
c7c 
c08 
c