Warning: Permanently added '10.128.10.48' (ECDSA) to the list of known hosts.
executing program
[  616.214616][ T1171] INFO: task syz-executor230:6858 blocked for more than 143 seconds.
[  616.222818][ T1171]       Not tainted 5.9.0-rc3-next-20200903-syzkaller #0
[  616.230227][ T1171] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  616.239009][ T1171] task:syz-executor230 state:D stack:28104 pid: 6858 ppid:  6852 flags:0x00004000
[  616.248297][ T1171] Call Trace:
[  616.251651][ T1171]  __schedule+0xea9/0x2230
[  616.256122][ T1171]  ? io_schedule_timeout+0x140/0x140
[  616.261406][ T1171]  ? lockdep_hardirqs_on+0x53/0x100
[  616.266657][ T1171]  schedule+0xd0/0x2a0
[  616.270725][ T1171]  schedule_timeout+0x1d8/0x250
[  616.275613][ T1171]  ? usleep_range+0x170/0x170
[  616.280292][ T1171]  ? lock_downgrade+0x830/0x830
[  616.285215][ T1171]  ? do_raw_spin_lock+0x120/0x2b0
[  616.290237][ T1171]  ? _raw_spin_unlock_irq+0x1f/0x80
[  616.295480][ T1171]  ? lockdep_hardirqs_on_prepare+0x354/0x530
[  616.301459][ T1171]  ? _raw_spin_unlock_irq+0x1f/0x80
[  616.306697][ T1171]  wait_for_completion+0x163/0x260
[  616.311809][ T1171]  ? wait_for_completion_interruptible+0x2e0/0x2e0
[  616.318377][ T1171]  ? apparmor_capable+0x1d8/0x460
[  616.323403][ T1171]  ? security_capable+0x8f/0xc0
[  616.328319][ T1171]  io_uring_setup+0x1495/0x29a0
[  616.333176][ T1171]  ? io_sq_thread+0xe00/0xe00
[  616.337889][ T1171]  ? io_issue_sqe+0x5bb0/0x5bb0
[  616.342738][ T1171]  ? io_wake_function+0x2e0/0x2e0
[  616.347818][ T1171]  ? check_preemption_disabled+0x50/0x130
[  616.353538][ T1171]  ? syscall_enter_from_user_mode+0x20/0x290
[  616.359619][ T1171]  ? lockdep_hardirqs_on+0x53/0x100
[  616.364967][ T1171]  do_syscall_64+0x2d/0x70
[  616.369450][ T1171]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[  616.375446][ T1171] RIP: 0033:0x440299
[  616.379329][ T1171] Code: Bad RIP value.
[  616.383438][ T1171] RSP: 002b:00007ffd17db0d48 EFLAGS: 00000246 ORIG_RAX: 00000000000001a9
[  616.391897][ T1171] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440299
[  616.399944][ T1171] RDX: 0000000000400b40 RSI: 00000000200001c0 RDI: 0000000000003c69
[  616.407987][ T1171] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000
[  616.416063][ T1171] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000401aa0
[  616.424110][ T1171] R13: 0000000000401b30 R14: 0000000000000000 R15: 0000000000000000
[  616.432164][ T1171] INFO: task io_uring-sq:6859 blocked for more than 143 seconds.
[  616.439959][ T1171]       Not tainted 5.9.0-rc3-next-20200903-syzkaller #0
[  616.447033][ T1171] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  616.455865][ T1171] task:io_uring-sq     state:D stack:31200 pid: 6859 ppid:     2 flags:0x00004000
[  616.465152][ T1171] Call Trace:
[  616.468448][ T1171]  __schedule+0xea9/0x2230
[  616.472866][ T1171]  ? io_schedule_timeout+0x140/0x140
[  616.478204][ T1171]  ? _raw_spin_unlock_irqrestore+0x6f/0x90
[  616.484044][ T1171]  schedule+0xd0/0x2a0
[  616.488171][ T1171]  ? __do_sys_io_uring_enter+0x1940/0x1940
[  616.493984][ T1171]  schedule_preempt_disabled+0xf/0x20
[  616.499460][ T1171]  kthread+0x2ac/0x4a0
[  616.503537][ T1171]  ? __kthread_bind_mask+0xc0/0xc0
[  616.508702][ T1171]  ret_from_fork+0x1f/0x30
[  616.513576][ T1171] 
[  616.513576][ T1171] Showing all locks held in the system:
[  616.521368][ T1171] 1 lock held by khungtaskd/1171:
[  616.526450][ T1171]  #0: ffffffff89c67500 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260
[  616.536422][ T1171] 
[  616.538740][ T1171] =============================================
[  616.538740][ T1171] 
[  616.547191][ T1171] NMI backtrace for cpu 0
[  616.551512][ T1171] CPU: 0 PID: 1171 Comm: khungtaskd Not tainted 5.9.0-rc3-next-20200903-syzkaller #0
[  616.560947][ T1171] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  616.570992][ T1171] Call Trace:
[  616.574271][ T1171]  dump_stack+0x198/0x1fd
[  616.578578][ T1171]  nmi_cpu_backtrace.cold+0x44/0xd7
[  616.583753][ T1171]  ? lapic_can_unplug_cpu.cold+0x38/0x38
[  616.589371][ T1171]  nmi_trigger_cpumask_backtrace+0x1b3/0x223
[  616.595329][ T1171]  watchdog+0xd89/0xf30
[  616.599465][ T1171]  ? trace_sched_process_hang+0x2e0/0x2e0
[  616.605160][ T1171]  kthread+0x3b5/0x4a0
[  616.609203][ T1171]  ? __kthread_bind_mask+0xc0/0xc0
[  616.614290][ T1171]  ret_from_fork+0x1f/0x30
[  616.618765][ T1171] Sending NMI from CPU 0 to CPUs 1:
[  616.624068][    C1] NMI backtrace for cpu 1 skipped: idling at native_safe_halt+0xe/0x10
[  616.624971][ T1171] Kernel panic - not syncing: hung_task: blocked tasks
[  616.639133][ T1171] CPU: 0 PID: 1171 Comm: khungtaskd Not tainted 5.9.0-rc3-next-20200903-syzkaller #0
[  616.648556][ T1171] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  616.658582][ T1171] Call Trace:
[  616.661846][ T1171]  dump_stack+0x198/0x1fd
[  616.666168][ T1171]  panic+0x347/0x7c0
[  616.670039][ T1171]  ? __warn_printk+0xf3/0xf3
[  616.674619][ T1171]  ? cpumask_next+0x3c/0x40
[  616.679109][ T1171]  ? printk_safe_flush+0xd6/0x120
[  616.684119][ T1171]  ? watchdog.cold+0x22d/0x24b
[  616.688884][ T1171]  ? watchdog+0xc59/0xf30
[  616.693191][ T1171]  watchdog.cold+0x23e/0x24b
[  616.697758][ T1171]  ? trace_sched_process_hang+0x2e0/0x2e0
[  616.703455][ T1171]  kthread+0x3b5/0x4a0
[  616.707501][ T1171]  ? __kthread_bind_mask+0xc0/0xc0
[  616.712608][ T1171]  ret_from_fork+0x1f/0x30
[  616.718428][ T1171] Kernel Offset: disabled
[  616.722745][ T1171] Rebooting in 86400 seconds..