Warning: Permanently added '10.128.0.95' (ECDSA) to the list of known hosts.
syzkaller login: [  636.731012][ T1171] INFO: task syz-executor817:6824 blocked for more than 143 seconds.
[  636.731025][ T1171]       Not tainted 5.9.0-rc2-syzkaller #0
[  636.731035][ T1171] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  636.731040][ T1171] task:syz-executor817 state:D stack:27424 pid: 6824 ppid:  6818 flags:0x00004000
[  636.731059][ T1171] Call Trace:
[  636.767123][ T1171]  __schedule+0x979/0xce0
[  636.771516][ T1171]  ? schedule+0x188/0x220
[  636.775876][ T1171]  ? schedule_timeout+0x43/0x250
[  636.780940][ T1171]  ? do_raw_spin_unlock+0x134/0x8d0
[  636.786129][ T1171]  ? _raw_spin_unlock_irq+0x1f/0x80
[  636.791432][ T1171]  ? lockdep_hardirqs_on+0x49/0xf0
[  636.796532][ T1171]  ? do_wait_for_common+0x232/0x370
[  636.801766][ T1171]  ? console_conditional_schedule+0x30/0x30
[  636.807650][ T1171]  ? wait_for_completion_timeout+0x41/0x60
[  636.813668][ T1171]  ? usb_start_wait_urb+0x10d/0x2a0
[  636.818883][ T1171]  ? do_proc_bulk+0x814/0xed0
[  636.823607][ T1171]  ? usbdev_ioctl+0x2d9c/0x6180
[  636.828533][ T1171]  ? do_vfs_ioctl+0x6bc/0x16d0
[  636.833522][ T1171]  ? bpf_lsm_file_ioctl+0x5/0x10
[  636.838465][ T1171]  ? usbdev_poll+0x1f0/0x1f0
[  636.843089][ T1171]  ? __se_sys_ioctl+0xfb/0x170
[  636.847882][ T1171]  ? do_syscall_64+0x31/0x70
[  636.852523][ T1171]  ? entry_SYSCALL_64_after_hwframe+0x44/0xa9
[  636.858590][ T1171] 
[  636.858590][ T1171] Showing all locks held in the system:
[  636.866349][ T1171] 1 lock held by khungtaskd/1171:
[  636.871445][ T1171]  #0: ffffffff894fe510 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
[  636.880794][ T1171] 1 lock held by in:imklog/6507:
[  636.885709][ T1171]  #0: ffff88809dd05430 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x253/0x2f0
[  636.895680][ T1171] 
[  636.897992][ T1171] =============================================
[  636.897992][ T1171] 
[  636.906445][ T1171] NMI backtrace for cpu 1
[  636.910834][ T1171] CPU: 1 PID: 1171 Comm: khungtaskd Not tainted 5.9.0-rc2-syzkaller #0
[  636.919049][ T1171] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  636.929071][ T1171] Call Trace:
[  636.932440][ T1171]  dump_stack+0x1f0/0x31e
[  636.936799][ T1171]  nmi_cpu_backtrace+0x9f/0x180
[  636.941674][ T1171]  ? arch_trigger_cpumask_backtrace+0x10/0x10
[  636.947715][ T1171]  nmi_trigger_cpumask_backtrace+0x16a/0x280
[  636.953699][ T1171]  watchdog+0xd65/0xdb0
[  636.957893][ T1171]  kthread+0x37e/0x3a0
[  636.961936][ T1171]  ? hungtask_pm_notify+0x50/0x50
[  636.966946][ T1171]  ? kthread_blkcg+0xd0/0xd0
[  636.971573][ T1171]  ret_from_fork+0x1f/0x30
[  636.976093][ T1171] Sending NMI from CPU 1 to CPUs 0:
[  636.981379][    C0] NMI backtrace for cpu 0 skipped: idling at native_safe_halt+0xe/0x10
[  636.982317][ T1171] Kernel panic - not syncing: hung_task: blocked tasks
[  636.996427][ T1171] CPU: 1 PID: 1171 Comm: khungtaskd Not tainted 5.9.0-rc2-syzkaller #0
[  637.004629][ T1171] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  637.014659][ T1171] Call Trace:
[  637.017943][ T1171]  dump_stack+0x1f0/0x31e
[  637.022410][ T1171]  panic+0x264/0x7a0
[  637.026279][ T1171]  ? nmi_trigger_cpumask_backtrace+0x206/0x280
[  637.032403][ T1171]  ? arch_trigger_cpumask_backtrace+0x10/0x10
[  637.038451][ T1171]  watchdog+0xda5/0xdb0
[  637.042632][ T1171]  kthread+0x37e/0x3a0
[  637.046713][ T1171]  ? hungtask_pm_notify+0x50/0x50
[  637.051708][ T1171]  ? kthread_blkcg+0xd0/0xd0
[  637.056269][ T1171]  ret_from_fork+0x1f/0x30
[  637.062020][ T1171] Kernel Offset: disabled
[  637.066333][ T1171] Rebooting in 86400 seconds..