Warning: Permanently added '10.128.0.167' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [ 1004.507262] INFO: task syz-executor412:8108 blocked for more than 140 seconds.
[ 1004.507273]       Not tainted 4.19.206-syzkaller #0
[ 1004.507277] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 1004.507282] syz-executor412 D27344  8108   8106 0x00000004
[ 1004.533965] Call Trace:
[ 1004.536551]  __schedule+0x887/0x2040
[ 1004.540423]  ? io_schedule_timeout+0x140/0x140
[ 1004.545166]  ? mark_held_locks+0xa6/0xf0
[ 1004.549340]  ? rwsem_down_write_failed+0x3a5/0x760
[ 1004.554376]  schedule+0x8d/0x1b0
[ 1004.557804]  rwsem_down_write_failed+0x3aa/0x760
[ 1004.562585]  ? rwsem_down_read_failed_killable+0x580/0x580
[ 1004.568283]  ? do_raw_spin_unlock+0x171/0x230
[ 1004.573052]  call_rwsem_down_write_failed+0x13/0x20
[ 1004.578143]  ? __lock_acquire+0x2853/0x3ff0
[ 1004.582487]  down_write+0x4f/0x90
[ 1004.585951]  ? fuse_reverse_inval_entry+0xaa/0x660
[ 1004.591099]  fuse_reverse_inval_entry+0xaa/0x660
[ 1004.595900]  ? fuse_update_attributes+0xc0/0xc0
[ 1004.600626]  ? fuse_dev_do_write+0x24c7/0x2bc0
[ 1004.605239]  fuse_dev_do_write+0x251c/0x2bc0
[ 1004.609713]  ? futex_wait_queue_me+0x404/0x5e0
[ 1004.614321]  ? lock_acquire+0x170/0x3c0
[ 1004.618349]  ? mark_held_locks+0xf0/0xf0
[ 1004.622530]  ? fuse_dev_read+0x1f0/0x1f0
[ 1004.626577]  ? futex_wait+0x48e/0x610
[ 1004.630629]  ? lock_downgrade+0x720/0x720
[ 1004.634902]  ? check_preemption_disabled+0x41/0x280
[ 1004.640014]  ? check_preemption_disabled+0x41/0x280
[ 1004.645066]  ? aa_file_perm+0x417/0xd20
[ 1004.649125]  fuse_dev_write+0x153/0x1e0
[ 1004.653229]  ? fuse_dev_splice_write+0xa00/0xa00
[ 1004.658163]  ? do_futex+0x171/0x1880
[ 1004.661891]  ? ksys_mount+0xf4/0x130
[ 1004.665589]  ? __x64_sys_mount+0xba/0x150
[ 1004.669816]  ? do_syscall_64+0xf9/0x620
[ 1004.673808]  ? entry_SYSCALL_64_after_hwframe+0x49/0xbe
[ 1004.679256]  ? iov_iter_init+0xb8/0x1d0
[ 1004.683238]  ? iov_iter_init+0xb8/0x1d0
[ 1004.687286]  __vfs_write+0x51b/0x770
[ 1004.691011]  ? kernel_read+0x110/0x110
[ 1004.695103]  ? security_file_permission+0x1c0/0x220
[ 1004.700332]  vfs_write+0x1f3/0x540
[ 1004.703981]  ksys_write+0x12b/0x2a0
[ 1004.707721]  ? __ia32_sys_read+0xb0/0xb0
[ 1004.711809]  ? trace_hardirqs_off_caller+0x6e/0x210
[ 1004.716987]  ? do_syscall_64+0x21/0x620
[ 1004.721074]  do_syscall_64+0xf9/0x620
[ 1004.724868]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[ 1004.730148] RIP: 0033:0x44af59
[ 1004.733528] Code: Bad RIP value.
[ 1004.736885] RSP: 002b:00007f5e3c411208 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 1004.744878] RAX: ffffffffffffffda RBX: 00000000004cb4e8 RCX: 000000000044af59
[ 1004.752354] RDX: 0000000000000029 RSI: 00000000200043c0 RDI: 0000000000000003
[ 1004.760074] RBP: 00000000004cb4e0 R08: 0000000000000000 R09: 0000000000000000
[ 1004.767436] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004cb4ec
[ 1004.774698] R13: 00007ffdf5d1898f R14: 00007f5e3c411300 R15: 0000000000022000
[ 1004.782213] INFO: task syz-executor412:8113 blocked for more than 140 seconds.
[ 1004.789783]       Not tainted 4.19.206-syzkaller #0
[ 1004.795061] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 1004.803196] syz-executor412 D28488  8113   8106 0x00000004
[ 1004.808911] Call Trace:
[ 1004.811502]  __schedule+0x887/0x2040
[ 1004.815331]  ? io_schedule_timeout+0x140/0x140
[ 1004.819967]  ? prepare_to_wait_exclusive+0x2d0/0x2d0
[ 1004.825771]  schedule+0x8d/0x1b0
[ 1004.829239]  request_wait_answer+0x3dc/0x750
[ 1004.833670]  ? flush_bg_queue+0x390/0x390
[ 1004.837906]  ? wait_woken+0x250/0x250
[ 1004.841922]  __fuse_request_send+0x123/0x1c0
[ 1004.846329]  fuse_simple_request+0x2e6/0x820
[ 1004.850818]  fuse_lookup_name+0x24c/0x5c0
[ 1004.854974]  ? fuse_lock_inode+0xaf/0xe0
[ 1004.859099]  ? fuse_readdir+0x12f0/0x12f0
[ 1004.864143]  fuse_lookup+0xdf/0x410
[ 1004.867836]  ? fuse_lookup_name+0x5c0/0x5c0
[ 1004.872837]  ? d_alloc+0x1b7/0x230
[ 1004.876379]  ? do_raw_spin_unlock+0x171/0x230
[ 1004.880948]  ? _raw_spin_unlock+0x29/0x40
[ 1004.885383]  ? d_alloc+0x1bc/0x230
[ 1004.889034]  __lookup_hash+0x117/0x180
[ 1004.892932]  filename_create+0x186/0x490
[ 1004.897087]  ? kern_path_mountpoint+0x40/0x40
[ 1004.901606]  ? strncpy_from_user+0x2a2/0x350
[ 1004.906086]  ? getname_flags+0x25b/0x590
[ 1004.910368]  do_mkdirat+0xa0/0x2d0
[ 1004.913987]  ? __ia32_sys_mknod+0x120/0x120
[ 1004.918470]  ? trace_hardirqs_off_caller+0x6e/0x210
[ 1004.923504]  ? do_syscall_64+0x21/0x620
[ 1004.928202]  do_syscall_64+0xf9/0x620
[ 1004.932025]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[ 1004.937292] RIP: 0033:0x44af59
[ 1004.940496] Code: Bad RIP value.
[ 1004.943862] RSP: 002b:00007f5e3c3f0208 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
[ 1004.951653] RAX: ffffffffffffffda RBX: 00000000004cb4f8 RCX: 000000000044af59
[ 1004.959050] RDX: 0000000000000000 RSI: 0000000020004380 RDI: 00000000ffffff9c
[ 1004.966490] RBP: 00000000004cb4f0 R08: 0000000000000000 R09: 0000000000000000
[ 1004.974427] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004cb4fc
[ 1004.982244] R13: 00007ffdf5d1898f R14: 00007f5e3c3f0300 R15: 0000000000022000
[ 1004.989607] 
[ 1004.989607] Showing all locks held in the system:
[ 1004.996479] 1 lock held by khungtaskd/1490:
[ 1005.001357]  #0: 000000006da82cfa (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265
[ 1005.010145] 1 lock held by in:imklog/7808:
[ 1005.014388]  #0: 00000000965495d9 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310
[ 1005.022922] 2 locks held by syz-executor412/8108:
[ 1005.027834]  #0: 00000000181afe93 (&fc->killsb){.+.+}, at: fuse_dev_do_write+0x24c7/0x2bc0
[ 1005.036267]  #1: 000000009f9ab0b6 (&type->i_mutex_dir_key#8){+.+.}, at: fuse_reverse_inval_entry+0xaa/0x660
[ 1005.046532] 3 locks held by syz-executor412/8113:
[ 1005.051536]  #0: 00000000e62e60c8 (sb_writers#11){.+.+}, at: mnt_want_write+0x3a/0xb0
[ 1005.059592]  #1: 000000009f9ab0b6 (&type->i_mutex_dir_key#7/1){+.+.}, at: filename_create+0x15a/0x490
[ 1005.069138]  #2: 000000004de6e4a2 (&fi->mutex){+.+.}, at: fuse_lock_inode+0xaf/0xe0
[ 1005.077026] 
[ 1005.078698] =============================================
[ 1005.078698] 
[ 1005.086263] NMI backtrace for cpu 0
[ 1005.090225] CPU: 0 PID: 1490 Comm: khungtaskd Not tainted 4.19.206-syzkaller #0
[ 1005.097979] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 1005.107572] Call Trace:
[ 1005.110155]  dump_stack+0x1fc/0x2ef
[ 1005.113790]  nmi_cpu_backtrace.cold+0x63/0xa2
[ 1005.118364]  ? lapic_can_unplug_cpu+0x80/0x80
[ 1005.123301]  nmi_trigger_cpumask_backtrace+0x1a6/0x1f0
[ 1005.128838]  watchdog+0x991/0xe60
[ 1005.132369]  ? reset_hung_task_detector+0x30/0x30
[ 1005.137197]  kthread+0x33f/0x460
[ 1005.140547]  ? kthread_park+0x180/0x180
[ 1005.144518]  ret_from_fork+0x24/0x30
[ 1005.148335] Sending NMI from CPU 0 to CPUs 1:
[ 1005.152995] NMI backtrace for cpu 1 skipped: idling at native_safe_halt+0xe/0x10
[ 1005.153999] Kernel panic - not syncing: hung_task: blocked tasks
[ 1005.166754] CPU: 0 PID: 1490 Comm: khungtaskd Not tainted 4.19.206-syzkaller #0
[ 1005.174360] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 1005.183699] Call Trace:
[ 1005.186282]  dump_stack+0x1fc/0x2ef
[ 1005.190000]  panic+0x26a/0x50e
[ 1005.193181]  ? __warn_printk+0xf3/0xf3
[ 1005.197156]  ? lapic_can_unplug_cpu+0x80/0x80
[ 1005.201640]  ? ___preempt_schedule+0x16/0x18
[ 1005.206143]  ? watchdog+0x991/0xe60
[ 1005.209940]  ? nmi_trigger_cpumask_backtrace+0x15e/0x1f0
[ 1005.215392]  watchdog+0x9a2/0xe60
[ 1005.218927]  ? reset_hung_task_detector+0x30/0x30
[ 1005.223761]  kthread+0x33f/0x460
[ 1005.227119]  ? kthread_park+0x180/0x180
[ 1005.231090]  ret_from_fork+0x24/0x30
[ 1005.236324] Kernel Offset: disabled
[ 1005.239971] Rebooting in 86400 seconds..