Warning: Permanently added '10.128.1.70' (ED25519) to the list of known hosts. executing program [ 179.853717][ C1] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [ 179.860838][ C1] (detected by 1, t=10502 jiffies, g=5429, q=102) [ 179.867369][ C1] rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4294955112-4294944610), jiffies_till_next_fqs=1, root ->qsmask 0x0 [ 179.880766][ C1] rcu: rcu_preempt kthread starved for 10502 jiffies! g5429 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 [ 179.891898][ C1] rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. [ 179.901886][ C1] rcu: RCU grace-period kthread stack dump: [ 179.907793][ C1] task:rcu_preempt state:R running task stack:27584 pid: 15 ppid: 2 flags:0x00004000 [ 179.918621][ C1] Call Trace: [ 179.921924][ C1] [ 179.924883][ C1] __schedule+0x11b8/0x43b0 [ 179.929438][ C1] ? _raw_spin_lock_irqsave+0x7f/0xf0 [ 179.934840][ C1] ? _raw_spin_unlock_irqrestore+0x82/0x100 [ 179.940761][ C1] ? _raw_spin_unlock_irqrestore+0xaa/0x100 [ 179.946688][ C1] ? _raw_spin_unlock+0x40/0x40 [ 179.951569][ C1] ? rcu_is_watching+0x11/0xa0 [ 179.956356][ C1] ? release_firmware_map_entry+0x190/0x190 [ 179.962283][ C1] schedule+0x11b/0x1e0 [ 179.966465][ C1] schedule_timeout+0x15c/0x280 [ 179.971339][ C1] ? console_conditional_schedule+0x40/0x40 [ 179.977260][ C1] ? update_process_times+0x200/0x200 [ 179.982665][ C1] ? prepare_to_swait_event+0x331/0x350 [ 179.988240][ C1] rcu_gp_fqs_loop+0x29e/0x11b0 [ 179.993132][ C1] ? lockdep_hardirqs_on+0x94/0x140 [ 179.998355][ C1] ? rcu_gp_init+0xd58/0x10e0 [ 180.003063][ C1] ? rcu_gp_init+0x10e0/0x10e0 [ 180.007852][ C1] ? _raw_spin_unlock_irq+0x1f/0x40 [ 180.013088][ C1] ? lockdep_hardirqs_on+0x94/0x140 [ 180.018311][ C1] rcu_gp_kthread+0x98/0x350 [ 180.022926][ C1] ? rcu_report_qs_rsp+0x1a0/0x1a0 [ 180.028062][ C1] ? _raw_spin_unlock_irqrestore+0xaa/0x100 [ 180.033980][ C1] ? __kthread_parkme+0x157/0x1b0 [ 180.039041][ C1] kthread+0x436/0x520 [ 180.043128][ C1] ? rcu_report_qs_rsp+0x1a0/0x1a0 [ 180.048262][ C1] ? kthread_blkcg+0xd0/0xd0 [ 180.052877][ C1] ret_from_fork+0x1f/0x30 [ 180.057327][ C1] [ 180.060367][ C1] rcu: Stack dump where RCU GP kthread last ran: [ 180.066715][ C1] NMI backtrace for cpu 1 [ 180.071070][ C1] CPU: 1 PID: 4201 Comm: syz-executor213 Not tainted 5.15.185-syzkaller #0 [ 180.079671][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 180.089744][ C1] Call Trace: [ 180.093051][ C1] [ 180.095913][ C1] dump_stack_lvl+0x168/0x230 [ 180.100616][ C1] ? show_regs_print_info+0x20/0x20 [ 180.105846][ C1] ? load_image+0x3b0/0x3b0 [ 180.110375][ C1] ? irq_work_queue+0xbf/0x140 [ 180.115163][ C1] nmi_cpu_backtrace+0x397/0x3d0 [ 180.120132][ C1] ? nmi_trigger_cpumask_backtrace+0x280/0x280 [ 180.126304][ C1] ? _printk+0xcc/0x110 [ 180.130506][ C1] ? cpu_online+0x1d/0x30 [ 180.134942][ C1] ? load_image+0x3b0/0x3b0 [ 180.139470][ C1] ? arch_trigger_cpumask_backtrace+0x10/0x10 [ 180.145560][ C1] nmi_trigger_cpumask_backtrace+0x163/0x280 [ 180.151575][ C1] rcu_check_gp_kthread_starvation+0x1cd/0x250 [ 180.157765][ C1] print_other_cpu_stall+0x10c8/0x1220 [ 180.163430][ C1] ? print_cpu_stall+0x5f0/0x5f0 [ 180.168388][ C1] ? timekeeping_advance+0x7f6/0xac0 [ 180.173698][ C1] ? __lock_acquire+0x7c60/0x7c60 [ 180.178754][ C1] rcu_sched_clock_irq+0x831/0x1110 [ 180.183976][ C1] ? rcutree_dead_cpu+0x20/0x20 [ 180.188848][ C1] ? hrtimer_run_queues+0x162/0x440 [ 180.194064][ C1] ? account_process_tick+0x227/0x3a0 [ 180.199460][ C1] update_process_times+0x193/0x200 [ 180.204691][ C1] tick_sched_timer+0x37d/0x560 [ 180.209572][ C1] __hrtimer_run_queues+0x4fe/0xc40 [ 180.214806][ C1] ? tick_setup_sched_timer+0x2c0/0x2c0 [ 180.220380][ C1] ? hrtimer_interrupt+0x8d0/0x8d0 [ 180.225513][ C1] ? ktime_get_update_offsets_now+0x3ce/0x3e0 [ 180.231695][ C1] hrtimer_interrupt+0x3bb/0x8d0 [ 180.236681][ C1] __sysvec_apic_timer_interrupt+0x137/0x4a0 [ 180.242692][ C1] sysvec_apic_timer_interrupt+0x9b/0xc0 [ 180.248357][ C1] [ 180.251301][ C1] [ 180.254261][ C1] asm_sysvec_apic_timer_interrupt+0x16/0x20 [ 180.260291][ C1] RIP: 0010:_raw_spin_unlock_irq+0x25/0x40 [ 180.266123][ C1] Code: f6 ff 0f 1f 00 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 8e 9a b1 f7 48 89 df e8 56 6f b2 f7 e8 a1 13 d3 f7 fb bf 01 00 00 00 86 93 a6 f7 65 8b 05 27 a3 57 76 85 c0 74 02 5b c3 e8 d4 ad 55 [ 180.285747][ C1] RSP: 0018:ffffc90002f8fbc0 EFLAGS: 00000282 [ 180.291839][ C1] RAX: c684a23757dcc900 RBX: ffff88801b1cc0c0 RCX: c684a23757dcc900 [ 180.299825][ C1] RDX: dffffc0000000000 RSI: ffffffff8a0b11c0 RDI: 0000000000000001 [ 180.307823][ C1] RBP: 0000000000000000 R08: dffffc0000000000 R09: ffffed1003639819 [ 180.315813][ C1] R10: ffffed1003639819 R11: 1ffff11003639818 R12: ffff88801b1cc0c0 [ 180.323806][ C1] R13: 0000000000000021 R14: dffffc0000000000 R15: 000000001c000004 [ 180.331831][ C1] get_signal+0x11d6/0x12c0 [ 180.336393][ C1] arch_do_signal_or_restart+0xc1/0x1300 [ 180.342050][ C1] ? _copy_from_user+0x111/0x170 [ 180.347017][ C1] ? __ia32_sys_rt_sigreturn+0x660/0x790 [ 180.352679][ C1] ? load_gs_index+0x120/0x120 [ 180.357488][ C1] ? get_sigframe_size+0x10/0x10 [ 180.362470][ C1] ? exit_to_user_mode_loop+0x3b/0x130 [ 180.367965][ C1] exit_to_user_mode_loop+0x9e/0x130 [ 180.373364][ C1] exit_to_user_mode_prepare+0xb1/0x140 [ 180.378952][ C1] syscall_exit_to_user_mode+0x16/0x40 [ 180.384435][ C1] do_syscall_64+0x58/0xa0 [ 180.388863][ C1] ? clear_bhb_loop+0x30/0x80 [ 180.393555][ C1] ? clear_bhb_loop+0x30/0x80 [ 180.398252][ C1] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 180.404166][ C1] RIP: 0033:0x7f5c613ac289 [ 180.408597][ C1] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 1b 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 [ 180.428224][ C1] RSP: 002b:00007fffc47df428 EFLAGS: 00000246 [ 180.434353][ C1] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 00007f5c613ac289 [ 180.442431][ C1] RDX: 000020000006b000 RSI: 0000000000000000 RDI: 0000000000000000 [ 180.450417][ C1] RBP: 0000000000000000 R08: 00007f5c61364990 R09: 00007f5c61364990 [ 180.458410][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f5c613fc188 [ 180.466398][ C1] R13: 00007f5c61402ebc R14: 00007fffc47df460 R15: 0000000000000000 [ 180.474408][ C1]