Warning: Permanently added '10.128.0.161' (ED25519) to the list of known hosts. executing program [ 156.893232][ C0] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [ 156.900292][ C0] (detected by 0, t=10502 jiffies, g=3909, q=58) [ 156.906705][ C0] rcu: All QSes seen, last rcu_preempt kthread activity 10499 (4294952819-4294942320), jiffies_till_next_fqs=1, root ->qsmask 0x0 [ 156.920062][ C0] rcu: rcu_preempt kthread starved for 10499 jiffies! g3909 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 [ 156.931167][ C0] rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. [ 156.941128][ C0] rcu: RCU grace-period kthread stack dump: [ 156.947006][ C0] task:rcu_preempt state:R running task stack:26168 pid: 15 ppid: 2 flags:0x00004000 [ 156.957802][ C0] Call Trace: [ 156.961082][ C0] [ 156.964012][ C0] __schedule+0x12c4/0x45b0 [ 156.968539][ C0] ? _raw_spin_unlock_irqrestore+0x8b/0x130 [ 156.974446][ C0] ? _raw_spin_unlock_irqrestore+0xd9/0x130 [ 156.980349][ C0] ? __mod_timer+0xa8e/0xeb0 [ 156.984943][ C0] ? release_firmware_map_entry+0x190/0x190 [ 156.990829][ C0] ? mod_timer_pending+0x20/0x20 [ 156.995771][ C0] ? lockdep_softirqs_off+0x420/0x420 [ 157.003413][ C0] schedule+0x11b/0x1f0 [ 157.007586][ C0] schedule_timeout+0x1b9/0x300 [ 157.012442][ C0] ? console_conditional_schedule+0x40/0x40 [ 157.018422][ C0] ? update_process_times+0x200/0x200 [ 157.023985][ C0] ? prepare_to_swait_event+0x321/0x340 [ 157.029626][ C0] rcu_gp_fqs_loop+0x2bf/0x1080 [ 157.034486][ C0] ? dump_blkd_tasks+0x810/0x810 [ 157.039432][ C0] ? rcu_gp_init+0x1140/0x1140 [ 157.044206][ C0] ? finish_swait+0xc5/0x1d0 [ 157.048798][ C0] rcu_gp_kthread+0xa4/0x360 [ 157.053490][ C0] ? _raw_spin_unlock+0x40/0x40 [ 157.059839][ C0] ? rcu_report_qs_rsp+0x1a0/0x1a0 [ 157.064964][ C0] ? _raw_spin_unlock_irqrestore+0xd9/0x130 [ 157.071559][ C0] ? __kthread_parkme+0x15c/0x1c0 [ 157.076593][ C0] kthread+0x3f6/0x4f0 [ 157.080665][ C0] ? rcu_report_qs_rsp+0x1a0/0x1a0 [ 157.085860][ C0] ? kthread_blkcg+0xd0/0xd0 [ 157.090448][ C0] ret_from_fork+0x1f/0x30 [ 157.094959][ C0] [ 157.097984][ C0] rcu: Stack dump where RCU GP kthread last ran: [ 157.104407][ C0] NMI backtrace for cpu 0 [ 157.108732][ C0] CPU: 0 PID: 4190 Comm: syz-executor476 Not tainted 5.15.170-syzkaller #0 [ 157.117491][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 157.130503][ C0] Call Trace: [ 157.133795][ C0] [ 157.136636][ C0] dump_stack_lvl+0x1e3/0x2d0 [ 157.141321][ C0] ? io_uring_drop_tctx_refs+0x1a0/0x1a0 [ 157.146954][ C0] ? panic+0x860/0x860 [ 157.151036][ C0] nmi_cpu_backtrace+0x46a/0x4a0 [ 157.155975][ C0] ? __wake_up_klogd+0xd5/0x100 [ 157.160833][ C0] ? nmi_trigger_cpumask_backtrace+0x2a0/0x2a0 [ 157.166978][ C0] ? _printk+0xd1/0x120 [ 157.171136][ C0] ? cpu_online+0x1f/0x40 [ 157.175464][ C0] ? panic+0x860/0x860 [ 157.179629][ C0] ? arch_trigger_cpumask_backtrace+0x10/0x10 [ 157.185778][ C0] nmi_trigger_cpumask_backtrace+0x181/0x2a0 [ 157.191760][ C0] rcu_check_gp_kthread_starvation+0x1d2/0x240 [ 157.198008][ C0] print_other_cpu_stall+0x137a/0x14d0 [ 157.203568][ C0] ? print_cpu_stall+0x600/0x600 [ 157.208507][ C0] ? do_raw_spin_unlock+0x137/0x8b0 [ 157.213707][ C0] rcu_sched_clock_irq+0xa38/0x1150 [ 157.218905][ C0] ? rcutree_dead_cpu+0x20/0x20 [ 157.223754][ C0] ? hrtimer_run_queues+0x163/0x450 [ 157.228950][ C0] ? account_process_tick+0x232/0x3a0 [ 157.234324][ C0] update_process_times+0x196/0x200 [ 157.239523][ C0] tick_sched_timer+0x386/0x550 [ 157.244372][ C0] ? tick_setup_sched_timer+0x2d0/0x2d0 [ 157.249929][ C0] __hrtimer_run_queues+0x55b/0xcf0 [ 157.255194][ C0] ? hrtimer_interrupt+0x980/0x980 [ 157.260387][ C0] ? ktime_get_update_offsets_now+0x407/0x420 [ 157.266456][ C0] hrtimer_interrupt+0x392/0x980 [ 157.271409][ C0] __sysvec_apic_timer_interrupt+0x13b/0x4b0 [ 157.277393][ C0] sysvec_apic_timer_interrupt+0x9b/0xc0 [ 157.283027][ C0] [ 157.285951][ C0] [ 157.288877][ C0] asm_sysvec_apic_timer_interrupt+0x16/0x20 [ 157.295925][ C0] RIP: 0010:clear_user+0xc5/0x150 [ 157.301054][ C0] Code: b1 9b 4e fd 4c 89 f0 4c 01 f8 72 61 4c 39 e0 77 5c e8 bf 97 4e fd 48 c7 c7 c6 c0 24 8c be 14 00 00 00 e8 fe f6 87 fd 0f 01 cb <44> 89 f8 83 e0 07 49 c1 ef 03 4c 89 f9 4c 89 f7 48 85 c9 74 15 66 [ 157.320665][ C0] RSP: 0018:ffffc90002f07c58 EFLAGS: 00040246 [ 157.326739][ C0] RAX: c3c19aade6bef400 RBX: 00007ffd17f1b670 RCX: ffffc90002f07b03 [ 157.334733][ C0] RDX: 0000000000000000 RSI: ffffffff8a8b3d20 RDI: ffffffff8ad90480 [ 157.343403][ C0] RBP: ffffc90002f07eb8 R08: dffffc0000000000 R09: fffffbfff1bd2cce [ 157.351384][ C0] R10: 0000000000000000 R11: dffffc0000000001 R12: 00007ffffffff000 [ 157.359349][ C0] R13: dffffc0000000000 R14: 00007ffd17f1b620 R15: 0000000000000050 [ 157.367621][ C0] ? clear_user+0xc2/0x150 [ 157.372054][ C0] copy_siginfo_to_user+0x57/0x80 [ 157.377082][ C0] arch_do_signal_or_restart+0xb0a/0x1890 [ 157.382820][ C0] ? get_sigframe_size+0x10/0x10 [ 157.387756][ C0] ? __ia32_sys_sigaltstack+0x60/0x60 [ 157.393140][ C0] ? __do_sys_rt_sigreturn+0x19d/0x250 [ 157.398598][ C0] ? exit_to_user_mode_loop+0x39/0x130 [ 157.404055][ C0] exit_to_user_mode_loop+0x97/0x130 [ 157.409335][ C0] exit_to_user_mode_prepare+0xb1/0x140 [ 157.414884][ C0] syscall_exit_to_user_mode+0x5d/0x240 [ 157.421567][ C0] do_syscall_64+0x47/0xb0 [ 157.426006][ C0] ? clear_bhb_loop+0x15/0x70 [ 157.430717][ C0] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 157.436639][ C0] RIP: 0033:0x7fb111291019 [ 157.441170][ 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 [ 157.460778][ C0] RSP: 002b:00007ffd17f1ba48 EFLAGS: 00000246 [ 157.467042][ C0] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 00007fb111291019 [ 157.476752][ C0] RDX: 000000002006b000 RSI: 0000000000000000 RDI: 0000000000000000 [ 157.484729][ C0] RBP: 0000000000000000 R08: 00007fb1112ee31c R09: 00007fb1112ee31c [ 157.492697][ C0] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fb1112ee31c [ 157.500658][ C0] R13: 00007fb1112e8106 R14: 00007ffd17f1ba90 R15: 0000000000000000 [ 157.508641][ C0]