Warning: Permanently added '10.128.1.80' (ED25519) to the list of known hosts. executing program [ 174.928181][ C0] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [ 174.935281][ C0] (detected by 0, t=10502 jiffies, g=6089, q=143) [ 174.941815][ C0] rcu: All QSes seen, last rcu_preempt kthread activity 10503 (4294954591-4294944088), jiffies_till_next_fqs=1, root ->qsmask 0x0 [ 174.955215][ C0] rcu: rcu_preempt kthread starved for 10504 jiffies! g6089 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 [ 174.966523][ C0] rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. [ 174.976743][ C0] rcu: RCU grace-period kthread stack dump: [ 174.982668][ C0] task:rcu_preempt state:R running task stack:28032 pid: 15 ppid: 2 flags:0x00004000 [ 174.993502][ C0] Call Trace: [ 174.997000][ C0] [ 174.999965][ C0] __schedule+0x11b8/0x43b0 [ 175.004532][ C0] ? _raw_spin_lock_irqsave+0x7f/0xf0 [ 175.009944][ C0] ? _raw_spin_unlock_irqrestore+0x82/0x100 [ 175.015969][ C0] ? _raw_spin_unlock_irqrestore+0xaa/0x100 [ 175.021897][ C0] ? _raw_spin_unlock+0x40/0x40 [ 175.026782][ C0] ? rcu_is_watching+0x11/0xa0 [ 175.031568][ C0] ? release_firmware_map_entry+0x190/0x190 [ 175.037501][ C0] schedule+0x11b/0x1e0 [ 175.041685][ C0] schedule_timeout+0x15c/0x280 [ 175.046559][ C0] ? console_conditional_schedule+0x40/0x40 [ 175.052517][ C0] ? update_process_times+0x200/0x200 [ 175.057930][ C0] ? prepare_to_swait_event+0x331/0x350 [ 175.063518][ C0] rcu_gp_fqs_loop+0x29e/0x11b0 [ 175.068507][ C0] ? lockdep_hardirqs_on+0x94/0x140 [ 175.073765][ C0] ? rcu_gp_init+0xd58/0x10e0 [ 175.078485][ C0] ? rcu_gp_init+0x10e0/0x10e0 [ 175.083291][ C0] ? _raw_spin_unlock_irq+0x1f/0x40 [ 175.088703][ C0] ? lockdep_hardirqs_on+0x94/0x140 [ 175.093950][ C0] rcu_gp_kthread+0x98/0x350 [ 175.098585][ C0] ? rcu_report_qs_rsp+0x1a0/0x1a0 [ 175.103827][ C0] ? _raw_spin_unlock_irqrestore+0xaa/0x100 [ 175.109856][ C0] ? __kthread_parkme+0x157/0x1b0 [ 175.115033][ C0] kthread+0x436/0x520 [ 175.119145][ C0] ? rcu_report_qs_rsp+0x1a0/0x1a0 [ 175.124290][ C0] ? kthread_blkcg+0xd0/0xd0 [ 175.128909][ C0] ret_from_fork+0x1f/0x30 [ 175.133378][ C0] [ 175.136418][ C0] rcu: Stack dump where RCU GP kthread last ran: [ 175.142771][ C0] NMI backtrace for cpu 0 [ 175.147128][ C0] CPU: 0 PID: 4194 Comm: syz-executor163 Not tainted 5.15.185-syzkaller #0 [ 175.155748][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 175.165825][ C0] Call Trace: [ 175.169138][ C0] [ 175.172005][ C0] dump_stack_lvl+0x168/0x230 [ 175.176797][ C0] ? show_regs_print_info+0x20/0x20 [ 175.182036][ C0] ? load_image+0x3b0/0x3b0 [ 175.186578][ C0] ? irq_work_queue+0xbf/0x140 [ 175.191378][ C0] nmi_cpu_backtrace+0x397/0x3d0 [ 175.196352][ C0] ? nmi_trigger_cpumask_backtrace+0x280/0x280 [ 175.202530][ C0] ? _printk+0xcc/0x110 [ 175.206714][ C0] ? cpu_online+0x1d/0x30 [ 175.211070][ C0] ? load_image+0x3b0/0x3b0 [ 175.215595][ C0] ? arch_trigger_cpumask_backtrace+0x10/0x10 [ 175.221691][ C0] nmi_trigger_cpumask_backtrace+0x163/0x280 [ 175.227700][ C0] rcu_check_gp_kthread_starvation+0x1cd/0x250 [ 175.233882][ C0] print_other_cpu_stall+0x10c8/0x1220 [ 175.239374][ C0] ? print_cpu_stall+0x5f0/0x5f0 [ 175.244333][ C0] ? ktime_get+0x7b/0x270 [ 175.248689][ C0] ? __lock_acquire+0x7c60/0x7c60 [ 175.253919][ C0] rcu_sched_clock_irq+0x831/0x1110 [ 175.259177][ C0] ? rcutree_dead_cpu+0x20/0x20 [ 175.264066][ C0] ? account_process_tick+0x227/0x3a0 [ 175.269567][ C0] update_process_times+0x193/0x200 [ 175.274819][ C0] tick_sched_timer+0x37d/0x560 [ 175.279719][ C0] __hrtimer_run_queues+0x4fe/0xc40 [ 175.284965][ C0] ? tick_setup_sched_timer+0x2c0/0x2c0 [ 175.290551][ C0] ? hrtimer_interrupt+0x8d0/0x8d0 [ 175.295698][ C0] ? ktime_get_update_offsets_now+0x3ce/0x3e0 [ 175.301822][ C0] hrtimer_interrupt+0x3bb/0x8d0 [ 175.306991][ C0] __sysvec_apic_timer_interrupt+0x137/0x4a0 [ 175.313011][ C0] sysvec_apic_timer_interrupt+0x9b/0xc0 [ 175.318683][ C0] [ 175.321641][ C0] [ 175.324603][ C0] asm_sysvec_apic_timer_interrupt+0x16/0x20 [ 175.330627][ C0] RIP: 0010:_raw_spin_unlock_irq+0x25/0x40 [ 175.336464][ C0] 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 [ 175.356358][ C0] RSP: 0018:ffffc90002fafbc0 EFLAGS: 00000282 [ 175.362470][ C0] RAX: b6d6ee42f718fb00 RBX: ffff88802a1b5340 RCX: b6d6ee42f718fb00 [ 175.370583][ C0] RDX: dffffc0000000000 RSI: ffffffff8a0b11c0 RDI: 0000000000000001 [ 175.378590][ C0] RBP: 0000000000000000 R08: dffffc0000000000 R09: ffffed1005436a69 [ 175.386597][ C0] R10: ffffed1005436a69 R11: 1ffff11005436a68 R12: ffff88802a1b5340 [ 175.394715][ C0] R13: 0000000000000021 R14: dffffc0000000000 R15: 000000001c000004 [ 175.402749][ C0] get_signal+0x11d6/0x12c0 [ 175.407307][ C0] arch_do_signal_or_restart+0xc1/0x1300 [ 175.412970][ C0] ? _copy_from_user+0x111/0x170 [ 175.417942][ C0] ? __ia32_sys_rt_sigreturn+0x660/0x790 [ 175.423611][ C0] ? load_gs_index+0x120/0x120 [ 175.428495][ C0] ? get_sigframe_size+0x10/0x10 [ 175.433488][ C0] ? exit_to_user_mode_loop+0x3b/0x130 [ 175.438980][ C0] exit_to_user_mode_loop+0x9e/0x130 [ 175.444296][ C0] exit_to_user_mode_prepare+0xb1/0x140 [ 175.449876][ C0] syscall_exit_to_user_mode+0x16/0x40 [ 175.455364][ C0] do_syscall_64+0x58/0xa0 [ 175.459804][ C0] ? clear_bhb_loop+0x30/0x80 [ 175.464503][ C0] ? clear_bhb_loop+0x30/0x80 [ 175.469203][ C0] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 175.475224][ C0] RIP: 0033:0x7f3fc236a25a [ 175.479666][ C0] Code: 48 3d 00 f0 ff ff 77 48 c3 0f 1f 80 00 00 00 00 48 83 ec 18 89 7c 24 0c e8 43 6b 02 00 8b 7c 24 0c 89 c2 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 36 89 d7 89 44 24 0c e8 a3 6b 02 00 8b 44 24 [ 175.499296][ C0] RSP: 002b:00007fff211b04b0 EFLAGS: 00000293 [ 175.505487][ C0] RAX: fffffffffffffff7 RBX: 0000000000000005 RCX: 00007f3fc236a25a [ 175.513484][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 [ 175.521474][ C0] RBP: 0000000000000000 R08: 00007fff211b0500 R09: 00007fff211b0500 [ 175.529459][ C0] R10: 0000000000000000 R11: 0000000000000293 R12: 00007f3fc23f3488 [ 175.537448][ C0] R13: 00007fff211b04ec R14: 0000000000000000 R15: 431bde82d7b634db [ 175.545457][ C0]