Warning: Permanently added '10.128.0.164' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [  717.567990] INFO: task syz-executor379:8111 blocked for more than 140 seconds.
[  717.575431]       Not tainted 4.19.211-syzkaller #0
[  717.581033] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  717.589360] syz-executor379 D27512  8111   8109 0x00000004
[  717.594990] Call Trace:
[  717.597564]  __schedule+0x887/0x2040
[  717.601420]  ? io_schedule_timeout+0x140/0x140
[  717.606001]  ? _raw_spin_unlock+0x29/0x40
[  717.610405]  schedule+0x8d/0x1b0
[  717.613775]  fuse_wait_on_page_writeback.isra.0+0x11b/0x170
[  717.619628]  ? fuse_do_ioctl+0x1850/0x1850
[  717.623860]  ? wait_woken+0x250/0x250
[  717.627650]  ? fuse_writepage_locked+0xb63/0x1010
[  717.632641]  ? fuse_writepage_locked+0x1010/0x1010
[  717.637569]  fuse_launder_page+0xb6/0xe0
[  717.641779]  invalidate_inode_pages2_range+0x795/0x1110
[  717.647151]  ? clear_shadow_entry+0x170/0x170
[  717.651786]  ? fuse_file_alloc+0x1d9/0x270
[  717.656045]  ? do_raw_spin_unlock+0x171/0x230
[  717.660678]  ? _raw_spin_unlock+0x29/0x40
[  717.664825]  ? fuse_do_open+0x1c4/0x500
[  717.668934]  fuse_finish_open+0x2e2/0x590
[  717.673079]  fuse_open_common+0x254/0x2c0
[  717.677208]  do_dentry_open+0x4aa/0x1160
[  717.681539]  ? fuse_open_common+0x2c0/0x2c0
[  717.686290]  ? inode_permission.part.0+0x10c/0x450
[  717.691349]  ? chown_common+0x550/0x550
[  717.695322]  ? inode_permission+0x3d/0x140
[  717.699698]  path_openat+0x793/0x2df0
[  717.703499]  ? path_lookupat+0x8d0/0x8d0
[  717.707542]  ? mark_held_locks+0xf0/0xf0
[  717.711746]  ? mark_held_locks+0xf0/0xf0
[  717.715804]  do_filp_open+0x18c/0x3f0
[  717.719727]  ? may_open_dev+0xf0/0xf0
[  717.723528]  ? lock_downgrade+0x720/0x720
[  717.727656]  ? lock_acquire+0x170/0x3c0
[  717.731777]  ? __alloc_fd+0x34/0x570
[  717.735487]  ? do_raw_spin_unlock+0x171/0x230
[  717.740101]  ? _raw_spin_unlock+0x29/0x40
[  717.744251]  ? __alloc_fd+0x28d/0x570
[  717.748178]  do_sys_open+0x3b3/0x520
[  717.751886]  ? filp_open+0x70/0x70
[  717.755432]  ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe
[  717.760928]  ? trace_hardirqs_off_caller+0x6e/0x210
[  717.765941]  ? do_syscall_64+0x21/0x620
[  717.770043]  do_syscall_64+0xf9/0x620
[  717.773843]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[  717.779161] RIP: 0033:0x7f66e38174c9
[  717.782870] Code: Bad RIP value.
[  717.786216] RSP: 002b:00007f66e37c82f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
[  717.794056] RAX: ffffffffffffffda RBX: 00007f66e38a84c0 RCX: 00007f66e38174c9
[  717.801441] RDX: 00007f66e38174c9 RSI: 0000000000000000 RDI: 00000000200001c0
[  717.808832] RBP: 00007f66e3875164 R08: 0000000000000000 R09: 0000000000000000
[  717.816096] R10: 0000000000000000 R11: 0000000000000246 R12: 0030656c69662f2e
[  717.823488] R13: 00007f66e3871158 R14: 00007f66e3873160 R15: 00007f66e38a84c8
[  717.830838] 
[  717.830838] Showing all locks held in the system:
[  717.837158] 1 lock held by khungtaskd/1570:
[  717.841512]  #0: 00000000e7d4009a (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265
[  717.850185] 1 lock held by in:imklog/7767:
[  717.854414]  #0: 00000000ecc62b4a (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310
[  717.862429] 2 locks held by syz-executor379/8111:
[  717.867261]  #0: 00000000731f07c0 (sb_writers#11){.+.+}, at: mnt_want_write+0x3a/0xb0
[  717.875284]  #1: 000000008f063a06 (&sb->s_type->i_mutex_key#17){+.+.}, at: fuse_open_common+0x1bc/0x2c0
[  717.885393] 
[  717.887007] =============================================
[  717.887007] 
[  717.894211] NMI backtrace for cpu 0
[  717.897892] CPU: 0 PID: 1570 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0
[  717.905326] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  717.914665] Call Trace:
[  717.917234]  dump_stack+0x1fc/0x2ef
[  717.920844]  nmi_cpu_backtrace.cold+0x63/0xa2
[  717.925320]  ? lapic_can_unplug_cpu+0x80/0x80
[  717.929796]  nmi_trigger_cpumask_backtrace+0x1a6/0x1f0
[  717.935056]  watchdog+0x991/0xe60
[  717.938503]  ? reset_hung_task_detector+0x30/0x30
[  717.943326]  kthread+0x33f/0x460
[  717.946674]  ? kthread_park+0x180/0x180
[  717.950643]  ret_from_fork+0x24/0x30
[  717.954460] Sending NMI from CPU 0 to CPUs 1:
[  717.959048] NMI backtrace for cpu 1 skipped: idling at native_safe_halt+0xe/0x10
[  717.959994] Kernel panic - not syncing: hung_task: blocked tasks
[  717.972744] CPU: 0 PID: 1570 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0
[  717.980166] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  717.989841] Call Trace:
[  717.992418]  dump_stack+0x1fc/0x2ef
[  717.996028]  panic+0x26a/0x50e
[  717.999201]  ? __warn_printk+0xf3/0xf3
[  718.003067]  ? _raw_spin_unlock_irqrestore+0x79/0xe0
[  718.008150]  ? cpumask_next+0x3c/0x40
[  718.011929]  ? printk_safe_flush+0xd6/0x120
[  718.016230]  ? watchdog+0x991/0xe60
[  718.019840]  ? nmi_trigger_cpumask_backtrace+0x15e/0x1f0
[  718.025272]  watchdog+0x9a2/0xe60
[  718.028711]  ? reset_hung_task_detector+0x30/0x30
[  718.033536]  kthread+0x33f/0x460
[  718.036881]  ? kthread_park+0x180/0x180
[  718.040837]  ret_from_fork+0x24/0x30
[  718.044702] Kernel Offset: disabled
[  718.048315] Rebooting in 86400 seconds..