Warning: Permanently added '10.128.10.12' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 315.597587] hrtimer: interrupt took 39599 ns executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 421.137417] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [ 421.143738] rcu: (detected by 1, t=10502 jiffies, g=4385, q=89) [ 421.149891] rcu: All QSes seen, last rcu_preempt kthread activity 10503 (4294979105-4294968602), jiffies_till_next_fqs=1, root ->qsmask 0x0 [ 421.162557] syz-executor353 R running task 26984 8294 8125 0x00000000 [ 421.169765] Call Trace: [ 421.172341] [ 421.174500] sched_show_task.cold+0x332/0x396 [ 421.178993] ? __se_sys_sched_getattr+0x480/0x480 [ 421.183838] rcu_check_callbacks.cold+0xb37/0xe19 [ 421.188690] update_process_times+0x2a/0x70 [ 421.193010] tick_sched_handle+0x9b/0x180 [ 421.197155] tick_sched_timer+0xfc/0x290 [ 421.201216] __hrtimer_run_queues+0x3f6/0xe60 [ 421.205706] ? tick_nohz_restart_sched_tick+0x310/0x310 [ 421.211074] ? hrtimer_fixup_free+0xa0/0xa0 [ 421.215394] ? kvm_clock_get_cycles+0x14/0x30 [ 421.219881] ? ktime_get_update_offsets_now+0x2ec/0x460 [ 421.225246] hrtimer_interrupt+0x326/0x9e0 [ 421.229661] smp_apic_timer_interrupt+0x10c/0x550 [ 421.234509] apic_timer_interrupt+0xf/0x20 [ 421.238740] [ 421.240988] RIP: 0010:_raw_spin_unlock_irq+0x50/0x80 [ 421.246166] Code: c0 98 82 f1 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 31 48 83 3d 01 31 d8 01 00 74 25 fb 66 0f 1f 44 00 00 01 00 00 00 e8 26 1b 28 f9 65 8b 05 9f 8d e8 77 85 c0 74 02 5d [ 421.265068] RSP: 0018:ffff888095287810 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 [ 421.272775] RAX: 1ffffffff13e3053 RBX: dffffc0000000000 RCX: 0000000000000000 [ 421.280041] RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffff8880afeeaac4 [ 421.287390] RBP: ffff8880ba12b0c0 R08: 0000000000000000 R09: 0000000000000000 [ 421.294650] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880afeea240 [ 421.301916] R13: ffff8880afeea240 R14: ffffffff8869e580 R15: ffff8880ba12b0c0 [ 421.309203] __schedule+0x15a9/0x2040 [ 421.313008] ? io_schedule_timeout+0x140/0x140 [ 421.317593] schedule+0x8d/0x1b0 [ 421.320958] tty_open+0x5ff/0x990 [ 421.324932] ? tty_kopen+0x220/0x220 [ 421.328646] ? tty_kopen+0x220/0x220 [ 421.332356] chrdev_open+0x266/0x770 [ 421.336070] ? lockref_get+0x11/0x50 [ 421.339780] ? __register_chrdev+0x400/0x400 [ 421.344187] do_dentry_open+0x4aa/0x1160 [ 421.348333] ? __register_chrdev+0x400/0x400 [ 421.352740] ? chown_common+0x550/0x550 [ 421.356717] ? audit_kill_trees+0x230/0x230 [ 421.361046] path_openat+0x793/0x2df0 [ 421.364853] ? path_lookupat+0x8d0/0x8d0 [ 421.368912] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 421.373668] ? mark_held_locks+0xf0/0xf0 [ 421.377988] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 421.382660] do_filp_open+0x18c/0x3f0 [ 421.386457] ? may_open_dev+0xf0/0xf0 [ 421.390267] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 421.395026] ? rcu_nmi_exit+0xb3/0x180 [ 421.398914] ? retint_kernel+0x2d/0x2d [ 421.404018] ? __alloc_fd+0x295/0x570 [ 421.407816] do_sys_open+0x3b3/0x520 [ 421.411537] ? filp_open+0x70/0x70 [ 421.415081] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 421.420933] ? trace_hardirqs_off_caller+0x6e/0x210 [ 421.425950] ? do_syscall_64+0x21/0x620 [ 421.429925] do_syscall_64+0xf9/0x620 [ 421.433731] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 421.438918] RIP: 0033:0x7ff2bf68caf9 [ 421.442642] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 11 15 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 [ 421.461624] RSP: 002b:00007ff2bf63e318 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 [ 421.469330] RAX: ffffffffffffffda RBX: 00007ff2bf7143e8 RCX: 00007ff2bf68caf9 [ 421.476598] RDX: 0000000000000802 RSI: 0000000020000840 RDI: ffffffffffffff9c [ 421.483863] RBP: 00007ff2bf7143e0 R08: 0000000000000000 R09: 0000000000000000 [ 421.491129] R10: 0000000000000000 R11: 0000000000000246 R12: 7974742f7665642f [ 421.498391] R13: 00007fff5904369f R14: 00007ff2bf63e400 R15: 0000000000022000 [ 421.505679] rcu: rcu_preempt kthread starved for 10538 jiffies! g4385 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 [ 421.516063] rcu: RCU grace-period kthread stack dump: [ 421.521283] rcu_preempt R running task 29208 10 2 0x80000000 [ 421.528475] Call Trace: [ 421.531068] __schedule+0x887/0x2040 [ 421.534790] ? io_schedule_timeout+0x140/0x140 [ 421.539461] ? _raw_spin_unlock_irqrestore+0x79/0xe0 [ 421.544561] schedule+0x8d/0x1b0 [ 421.547923] schedule_timeout+0x4cf/0xfe0 [ 421.552083] ? prepare_to_swait_event+0x5b/0x540 [ 421.556946] ? usleep_range+0x170/0x170 [ 421.560925] ? _raw_spin_unlock_irqrestore+0x79/0xe0 [ 421.566031] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 421.570614] ? collect_expired_timers+0x2a0/0x2a0 [ 421.575547] ? swake_up_all+0x340/0x340 [ 421.579523] rcu_gp_kthread+0xdad/0x21c0 [ 421.583870] ? lock_acquire+0x170/0x3c0 [ 421.587843] ? __rcu_read_unlock+0x160/0x160 [ 421.592266] ? _raw_spin_unlock_irqrestore+0x79/0xe0 [ 421.598673] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 421.603282] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 421.608377] ? __kthread_parkme+0x133/0x1e0 [ 421.612699] ? __rcu_read_unlock+0x160/0x160 [ 421.617106] kthread+0x33f/0x460 [ 421.620475] ? kthread_park+0x180/0x180 [ 421.624450] ret_from_fork+0x24/0x30