Warning: Permanently added '10.128.0.122' (ED25519) to the list of known hosts. executing program executing program [ 295.974444][ C0] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [ 295.982904][ C0] (detected by 0, t=10502 jiffies, g=3969, q=76) [ 295.990572][ C0] rcu: All QSes seen, last rcu_preempt kthread activity 10500 (4294966713-4294956213), jiffies_till_next_fqs=1, root ->qsmask 0x0 [ 296.005956][ C0] rcu: rcu_preempt kthread starved for 10502 jiffies! g3969 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 [ 296.017714][ C0] rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. [ 296.029031][ C0] rcu: RCU grace-period kthread stack dump: [ 296.035505][ C0] task:rcu_preempt state:R running task stack:27000 pid: 15 ppid: 2 flags:0x00004000 [ 296.047792][ C0] Call Trace: [ 296.051289][ C0] [ 296.054700][ C0] __schedule+0x12c4/0x45b0 [ 296.059571][ C0] ? _raw_spin_unlock_irqrestore+0x8b/0x130 [ 296.065640][ C0] ? _raw_spin_unlock_irqrestore+0xd9/0x130 [ 296.071911][ C0] ? __mod_timer+0xa8e/0xeb0 [ 296.076873][ C0] ? __sched_text_start+0x8/0x8 [ 296.082332][ C0] ? mod_timer_pending+0x20/0x20 [ 296.087532][ C0] ? lockdep_softirqs_off+0x420/0x420 [ 296.093052][ C0] schedule+0x11b/0x1f0 [ 296.097220][ C0] schedule_timeout+0x1b9/0x300 [ 296.102155][ C0] ? console_conditional_schedule+0x40/0x40 [ 296.108220][ C0] ? update_process_times+0x200/0x200 [ 296.113859][ C0] ? prepare_to_swait_event+0x321/0x340 [ 296.119813][ C0] rcu_gp_fqs_loop+0x2bf/0x1080 [ 296.125541][ C0] ? dump_blkd_tasks+0x810/0x810 [ 296.130771][ C0] ? rcu_gp_init+0x1140/0x1140 [ 296.135804][ C0] ? finish_swait+0xc5/0x1d0 [ 296.140448][ C0] rcu_gp_kthread+0xa4/0x360 [ 296.145224][ C0] ? _raw_spin_unlock+0x40/0x40 [ 296.151612][ C0] ? rcu_report_qs_rsp+0x1a0/0x1a0 [ 296.157126][ C0] ? _raw_spin_unlock_irqrestore+0xd9/0x130 [ 296.163235][ C0] ? __kthread_parkme+0x15c/0x1c0 [ 296.168348][ C0] kthread+0x3f6/0x4f0 [ 296.172613][ C0] ? rcu_report_qs_rsp+0x1a0/0x1a0 [ 296.177908][ C0] ? kthread_blkcg+0xd0/0xd0 [ 296.182702][ C0] ret_from_fork+0x1f/0x30 [ 296.187603][ C0] [ 296.190633][ C0] rcu: Stack dump where RCU GP kthread last ran: [ 296.197047][ C0] NMI backtrace for cpu 0 [ 296.201460][ C0] CPU: 0 PID: 3546 Comm: syz-executor271 Not tainted 5.15.153-syzkaller #0 [ 296.210133][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 [ 296.220540][ C0] Call Trace: [ 296.223917][ C0] [ 296.226850][ C0] dump_stack_lvl+0x1e3/0x2cb [ 296.232032][ C0] ? io_uring_drop_tctx_refs+0x19d/0x19d [ 296.237762][ C0] ? panic+0x84d/0x84d [ 296.241870][ C0] nmi_cpu_backtrace+0x46a/0x4a0 [ 296.246980][ C0] ? __wake_up_klogd+0xd5/0x100 [ 296.252054][ C0] ? nmi_trigger_cpumask_backtrace+0x2a0/0x2a0 [ 296.258338][ C0] ? _printk+0xd1/0x111 [ 296.262625][ C0] ? cpu_online+0x1f/0x40 [ 296.267325][ C0] ? panic+0x84d/0x84d [ 296.271591][ C0] ? arch_trigger_cpumask_backtrace+0x10/0x10 [ 296.278023][ C0] nmi_trigger_cpumask_backtrace+0x181/0x2a0 [ 296.284286][ C0] rcu_check_gp_kthread_starvation+0x1d2/0x240 [ 296.290621][ C0] print_other_cpu_stall+0x137a/0x14d0 [ 296.296187][ C0] ? print_cpu_stall+0x600/0x600 [ 296.301393][ C0] ? ktime_get+0x7f/0x270 [ 296.306323][ C0] rcu_sched_clock_irq+0xa38/0x1150 [ 296.311711][ C0] ? rcutree_dead_cpu+0x20/0x20 [ 296.316648][ C0] ? do_raw_spin_unlock+0x137/0x8b0 [ 296.321867][ C0] ? hrtimer_run_queues+0x163/0x450 [ 296.327179][ C0] ? account_process_tick+0x232/0x3a0 [ 296.333027][ C0] update_process_times+0x196/0x200 [ 296.338333][ C0] tick_sched_timer+0x386/0x550 [ 296.343474][ C0] ? tick_setup_sched_timer+0x2d0/0x2d0 [ 296.349233][ C0] __hrtimer_run_queues+0x55b/0xcf0 [ 296.354582][ C0] ? hrtimer_interrupt+0x980/0x980 [ 296.360048][ C0] ? ktime_get_update_offsets_now+0x407/0x420 [ 296.366264][ C0] hrtimer_interrupt+0x392/0x980 [ 296.371237][ C0] __sysvec_apic_timer_interrupt+0x139/0x470 [ 296.377526][ C0] sysvec_apic_timer_interrupt+0x8c/0xb0 [ 296.383254][ C0] [ 296.386182][ C0] [ 296.389112][ C0] asm_sysvec_apic_timer_interrupt+0x16/0x20 [ 296.395117][ C0] RIP: 0010:_raw_spin_unlock_irq+0x25/0x40 [ 296.401202][ C0] Code: 81 82 f6 ff 90 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 ee 3a 3d f7 48 89 df e8 c6 8e 3e f7 e8 01 41 61 f7 fb bf 01 00 00 00 56 cb 31 f7 65 8b 05 27 f9 dc 75 85 c0 74 02 5b c3 e8 b4 10 db [ 296.421705][ C0] RSP: 0018:ffffc90002d27bc0 EFLAGS: 00000282 [ 296.428306][ C0] RAX: a731d0f41c086200 RBX: ffff888023ccc0c0 RCX: ffffffff913c7f03 [ 296.436379][ C0] RDX: dffffc0000000000 RSI: ffffffff8a8b1500 RDI: 0000000000000001 [ 296.444548][ C0] RBP: 0000000000000000 R08: ffffffff8186b7c0 R09: ffffed1004799819 [ 296.453066][ C0] R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000021 [ 296.461136][ C0] R13: dffffc0000000000 R14: ffff888023ccc558 R15: ffff888023ccc0c0 [ 296.469128][ C0] ? trace_hardirqs_on+0x30/0x80 [ 296.475233][ C0] get_signal+0x13ee/0x14e0 [ 296.480453][ C0] arch_do_signal_or_restart+0xc3/0x1890 [ 296.486404][ C0] ? __do_compat_sys_x32_rt_sigreturn+0x250/0x250 [ 296.493087][ C0] ? __might_fault+0xb4/0x110 [ 296.498460][ C0] ? _copy_from_user+0x10f/0x170 [ 296.503762][ C0] ? restore_altstack+0x274/0x400 [ 296.509096][ C0] ? get_sigframe_size+0x10/0x10 [ 296.514045][ C0] ? __ia32_sys_sigaltstack+0x60/0x60 [ 296.519635][ C0] ? __do_sys_rt_sigreturn+0x19d/0x250 [ 296.525675][ C0] ? exit_to_user_mode_loop+0x39/0x130 [ 296.531331][ C0] exit_to_user_mode_loop+0x97/0x130 [ 296.537071][ C0] exit_to_user_mode_prepare+0xb1/0x140 [ 296.542729][ C0] syscall_exit_to_user_mode+0x5d/0x250 [ 296.549261][ C0] do_syscall_64+0x49/0xb0 [ 296.554321][ C0] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 296.560473][ C0] RIP: 0033:0x7f3104291e79 [ 296.564900][ C0] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 18 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 b0 ff ff ff f7 d8 64 89 01 48 [ 296.585627][ C0] RSP: 002b:00007fff6ac90df8 EFLAGS: 00000246 [ 296.591803][ C0] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 00007f3104291e79 [ 296.599882][ C0] RDX: 000000002006b000 RSI: 0000000000000000 RDI: 0000000000000000 [ 296.608942][ C0] RBP: 00000000000f4240 R08: 0000000000000000 R09: 0000000000000000 [ 296.617337][ C0] R10: 0000000000000000 R11: 0000000000000246 R12: 00005555556ac370 [ 296.626031][ C0] R13: 0000000000000002 R14: 00007fff6ac90e70 R15: 00007fff6ac90e60 [ 296.634136][ C0]