Warning: Permanently added '10.128.0.68' (ED25519) to the list of known hosts. executing program [ 201.744365][ C0] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [ 201.751479][ C0] (detected by 0, t=10502 jiffies, g=4169, q=34) [ 201.757905][ C0] rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4294957312-4294946810), jiffies_till_next_fqs=1, root ->qsmask 0x0 [ 201.771278][ C0] rcu: rcu_preempt kthread starved for 10502 jiffies! g4169 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 [ 201.782391][ C0] rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. [ 201.792454][ C0] rcu: RCU grace-period kthread stack dump: [ 201.798352][ C0] task:rcu_preempt state:R running task stack:26168 pid: 15 ppid: 2 flags:0x00004000 [ 201.809158][ C0] Call Trace: [ 201.812446][ C0] [ 201.815478][ C0] __schedule+0x12c4/0x45b0 [ 201.820105][ C0] ? _raw_spin_unlock_irqrestore+0x8b/0x130 [ 201.826015][ C0] ? _raw_spin_unlock_irqrestore+0xd9/0x130 [ 201.832022][ C0] ? __mod_timer+0xa8e/0xeb0 [ 201.836631][ C0] ? release_firmware_map_entry+0x190/0x190 [ 201.842534][ C0] ? mod_timer_pending+0x20/0x20 [ 201.847504][ C0] ? lockdep_softirqs_off+0x420/0x420 [ 201.852906][ C0] schedule+0x11b/0x1f0 [ 201.857161][ C0] schedule_timeout+0x1b9/0x300 [ 201.862113][ C0] ? console_conditional_schedule+0x40/0x40 [ 201.868020][ C0] ? update_process_times+0x200/0x200 [ 201.873416][ C0] ? prepare_to_swait_event+0x321/0x340 [ 201.878981][ C0] rcu_gp_fqs_loop+0x2bf/0x1080 [ 201.883847][ C0] ? _raw_spin_unlock_irq+0x1f/0x40 [ 201.889067][ C0] ? lockdep_hardirqs_on+0x94/0x130 [ 201.894283][ C0] ? rcu_gp_init+0xdae/0x1140 [ 201.898978][ C0] ? rcu_gp_init+0x1140/0x1140 [ 201.903762][ C0] ? finish_swait+0xc5/0x1d0 [ 201.908387][ C0] rcu_gp_kthread+0xa4/0x360 [ 201.912993][ C0] ? _raw_spin_unlock+0x40/0x40 [ 201.917951][ C0] ? rcu_report_qs_rsp+0x1a0/0x1a0 [ 201.923080][ C0] ? _raw_spin_unlock_irqrestore+0xd9/0x130 [ 201.928996][ C0] ? __kthread_parkme+0x15c/0x1c0 [ 201.934044][ C0] kthread+0x3f6/0x4f0 [ 201.938126][ C0] ? rcu_report_qs_rsp+0x1a0/0x1a0 [ 201.943258][ C0] ? kthread_blkcg+0xd0/0xd0 [ 201.947871][ C0] ret_from_fork+0x1f/0x30 [ 201.952316][ C0] [ 201.955356][ C0] rcu: Stack dump where RCU GP kthread last ran: [ 201.961694][ C0] NMI backtrace for cpu 0 [ 201.966041][ C0] CPU: 0 PID: 3602 Comm: syz-executor324 Not tainted 5.15.167-syzkaller #0 [ 201.974637][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 [ 201.984710][ C0] Call Trace: [ 201.987996][ C0] [ 201.990847][ C0] dump_stack_lvl+0x1e3/0x2d0 [ 201.995550][ C0] ? io_uring_drop_tctx_refs+0x1a0/0x1a0 [ 202.001198][ C0] ? panic+0x860/0x860 [ 202.005383][ C0] nmi_cpu_backtrace+0x46a/0x4a0 [ 202.010337][ C0] ? __wake_up_klogd+0xd5/0x100 [ 202.015209][ C0] ? nmi_trigger_cpumask_backtrace+0x2a0/0x2a0 [ 202.021377][ C0] ? _printk+0xd1/0x120 [ 202.025549][ C0] ? cpu_online+0x1f/0x40 [ 202.029894][ C0] ? panic+0x860/0x860 [ 202.033985][ C0] ? arch_trigger_cpumask_backtrace+0x10/0x10 [ 202.040065][ C0] nmi_trigger_cpumask_backtrace+0x181/0x2a0 [ 202.046064][ C0] rcu_check_gp_kthread_starvation+0x1d2/0x240 [ 202.052239][ C0] print_other_cpu_stall+0x137a/0x14d0 [ 202.057729][ C0] ? print_cpu_stall+0x600/0x600 [ 202.063089][ C0] ? __lock_acquire+0x1ff0/0x1ff0 [ 202.068164][ C0] ? do_raw_spin_unlock+0x137/0x8b0 [ 202.073385][ C0] rcu_sched_clock_irq+0xa38/0x1150 [ 202.078603][ C0] ? rcutree_dead_cpu+0x20/0x20 [ 202.083467][ C0] ? hrtimer_run_queues+0x163/0x450 [ 202.088676][ C0] ? account_process_tick+0x232/0x3a0 [ 202.094067][ C0] update_process_times+0x196/0x200 [ 202.099281][ C0] tick_sched_timer+0x386/0x550 [ 202.104149][ C0] ? tick_setup_sched_timer+0x2d0/0x2d0 [ 202.109706][ C0] __hrtimer_run_queues+0x55b/0xcf0 [ 202.114935][ C0] ? hrtimer_interrupt+0x980/0x980 [ 202.120056][ C0] ? ktime_get_update_offsets_now+0x407/0x420 [ 202.126143][ C0] hrtimer_interrupt+0x392/0x980 [ 202.131113][ C0] __sysvec_apic_timer_interrupt+0x139/0x470 [ 202.137114][ C0] sysvec_apic_timer_interrupt+0x8c/0xb0 [ 202.142762][ C0] [ 202.145702][ C0] [ 202.148637][ C0] asm_sysvec_apic_timer_interrupt+0x16/0x20 [ 202.154634][ C0] RIP: 0010:_raw_spin_unlock_irq+0x25/0x40 [ 202.160570][ C0] Code: 51 67 f6 ff 90 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 4e ed 24 f7 48 89 df e8 26 41 26 f7 e8 f1 f4 48 f7 fb bf 01 00 00 00 06 87 19 f7 65 8b 05 87 89 c4 75 85 c0 74 02 5b c3 e8 54 a6 c2 [ 202.180186][ C0] RSP: 0018:ffffc90002e37bc0 EFLAGS: 00000282 [ 202.186268][ C0] RAX: 01e52da06f54f700 RBX: ffff8880285e9280 RCX: ffffffff96868f03 [ 202.194374][ C0] RDX: dffffc0000000000 RSI: ffffffff8a8b2b00 RDI: 0000000000000001 [ 202.202357][ C0] RBP: 0000000000000000 R08: ffffffff8186db50 R09: ffffed10050bd251 [ 202.210338][ C0] R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000021 [ 202.218320][ C0] R13: dffffc0000000000 R14: ffff8880285e9718 R15: ffff8880285e9280 [ 202.226497][ C0] ? trace_hardirqs_on+0x30/0x80 [ 202.231468][ C0] get_signal+0x13ee/0x14e0 [ 202.236007][ C0] arch_do_signal_or_restart+0xc3/0x1890 [ 202.241658][ C0] ? __do_compat_sys_x32_rt_sigreturn+0x250/0x250 [ 202.248087][ C0] ? __might_fault+0xb4/0x110 [ 202.252781][ C0] ? _copy_from_user+0x10f/0x170 [ 202.257745][ C0] ? restore_altstack+0x274/0x400 [ 202.262784][ C0] ? get_sigframe_size+0x10/0x10 [ 202.267745][ C0] ? __ia32_sys_sigaltstack+0x60/0x60 [ 202.273142][ C0] ? __do_sys_rt_sigreturn+0x19d/0x250 [ 202.278622][ C0] ? exit_to_user_mode_loop+0x39/0x130 [ 202.284094][ C0] exit_to_user_mode_loop+0x97/0x130 [ 202.289392][ C0] exit_to_user_mode_prepare+0xb1/0x140 [ 202.294952][ C0] syscall_exit_to_user_mode+0x5d/0x240 [ 202.300520][ C0] do_syscall_64+0x47/0xb0 [ 202.304952][ C0] ? clear_bhb_loop+0x15/0x70 [ 202.309648][ C0] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 202.315560][ C0] RIP: 0033:0x7f2e7c1f8fb9 [ 202.320001][ C0] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 11 19 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 [ 202.340189][ C0] RSP: 002b:00007ffe65ce05b8 EFLAGS: 00000246 [ 202.346275][ C0] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 00007f2e7c1f8fb9 [ 202.354345][ C0] RDX: 000000002006b000 RSI: 0000000000000000 RDI: 0000000000000000 [ 202.362322][ C0] RBP: 0000000000000000 R08: 00007f2e7c25625c R09: 00007f2e7c25625c [ 202.370310][ C0] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f2e7c25625c [ 202.378305][ C0] R13: 00007f2e7c25010e R14: 00007ffe65ce0600 R15: 0000000000000000 [ 202.386308][ C0]