Warning: Permanently added '10.128.1.15' (ED25519) to the list of known hosts. Setting up swapspace version 1, size = 127995904 bytes [ 110.360815][ T4176] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k FS executing program executing program [ 215.728001][ C1] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [ 215.735141][ C1] (detected by 1, t=10502 jiffies, g=5829, q=68) [ 215.741606][ C1] rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4294958687-4294948185), jiffies_till_next_fqs=1, root ->qsmask 0x0 [ 215.755016][ C1] rcu: rcu_preempt kthread starved for 10502 jiffies! g5829 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 [ 215.766141][ C1] rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. [ 215.776127][ C1] rcu: RCU grace-period kthread stack dump: [ 215.782030][ C1] task:rcu_preempt state:R running task stack:26168 pid: 15 ppid: 2 flags:0x00004000 [ 215.792854][ C1] Call Trace: [ 215.796179][ C1] <TASK> [ 215.799135][ C1] __schedule+0x12c4/0x45b0 [ 215.803690][ C1] ? _raw_spin_unlock_irqrestore+0x8b/0x130 [ 215.809602][ C1] ? _raw_spin_unlock_irqrestore+0xd9/0x130 [ 215.815527][ C1] ? __mod_timer+0xa8e/0xeb0 [ 215.820177][ C1] ? release_firmware_map_entry+0x190/0x190 [ 215.826271][ C1] ? mod_timer_pending+0x20/0x20 [ 215.831588][ C1] ? lockdep_softirqs_off+0x420/0x420 [ 215.837002][ C1] schedule+0x11b/0x1f0 [ 215.841187][ C1] schedule_timeout+0x1b9/0x300 [ 215.846058][ C1] ? console_conditional_schedule+0x40/0x40 [ 215.851977][ C1] ? update_process_times+0x200/0x200 [ 215.857377][ C1] ? prepare_to_swait_event+0x321/0x340 [ 215.862954][ C1] rcu_gp_fqs_loop+0x2bf/0x1080 [ 215.867830][ C1] ? _raw_spin_unlock_irq+0x1f/0x40 [ 215.873046][ C1] ? lockdep_hardirqs_on+0x94/0x130 [ 215.878302][ C1] ? rcu_gp_init+0xdae/0x1140 [ 215.883044][ C1] ? rcu_gp_init+0x1140/0x1140 [ 215.887827][ C1] ? finish_swait+0xc5/0x1d0 [ 215.892441][ C1] rcu_gp_kthread+0xa4/0x360 [ 215.897079][ C1] ? _raw_spin_unlock+0x40/0x40 [ 215.901985][ C1] ? rcu_report_qs_rsp+0x1a0/0x1a0 [ 215.907138][ C1] ? _raw_spin_unlock_irqrestore+0xd9/0x130 [ 215.913058][ C1] ? __kthread_parkme+0x15c/0x1c0 [ 215.918108][ C1] kthread+0x3f6/0x4f0 [ 215.922197][ C1] ? rcu_report_qs_rsp+0x1a0/0x1a0 [ 215.927328][ C1] ? kthread_blkcg+0xd0/0xd0 [ 215.931941][ C1] ret_from_fork+0x1f/0x30 [ 215.936398][ C1] </TASK> [ 215.939461][ C1] rcu: Stack dump where RCU GP kthread last ran: [ 215.945798][ C1] NMI backtrace for cpu 1 [ 215.950152][ C1] CPU: 1 PID: 4206 Comm: syz-executor279 Not tainted 5.15.179-syzkaller #0 [ 215.958753][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 [ 215.968821][ C1] Call Trace: [ 215.972121][ C1] <IRQ> [ 215.974995][ C1] dump_stack_lvl+0x1e3/0x2d0 [ 215.979694][ C1] ? io_uring_drop_tctx_refs+0x1a0/0x1a0 [ 215.985374][ C1] ? panic+0x860/0x860 [ 215.989480][ C1] nmi_cpu_backtrace+0x46a/0x4a0 [ 215.994436][ C1] ? __wake_up_klogd+0xd5/0x100 [ 215.999314][ C1] ? nmi_trigger_cpumask_backtrace+0x2a0/0x2a0 [ 216.005572][ C1] ? _printk+0xd1/0x120 [ 216.009781][ C1] ? cpu_online+0x1f/0x40 [ 216.014132][ C1] ? panic+0x860/0x860 [ 216.018311][ C1] ? arch_trigger_cpumask_backtrace+0x10/0x10 [ 216.024497][ C1] nmi_trigger_cpumask_backtrace+0x181/0x2a0 [ 216.030505][ C1] rcu_check_gp_kthread_starvation+0x1d2/0x240 [ 216.036700][ C1] print_other_cpu_stall+0x137a/0x14d0 [ 216.042195][ C1] ? print_cpu_stall+0x600/0x600 [ 216.047163][ C1] ? do_raw_spin_unlock+0x137/0x8b0 [ 216.052388][ C1] rcu_sched_clock_irq+0xa38/0x1150 [ 216.057649][ C1] ? rcutree_dead_cpu+0x20/0x20 [ 216.062702][ C1] ? hrtimer_run_queues+0x163/0x450 [ 216.067918][ C1] ? account_process_tick+0x232/0x3a0 [ 216.073311][ C1] update_process_times+0x196/0x200 [ 216.078547][ C1] tick_sched_timer+0x386/0x550 [ 216.083516][ C1] ? tick_setup_sched_timer+0x2d0/0x2d0 [ 216.089093][ C1] __hrtimer_run_queues+0x55b/0xcf0 [ 216.094345][ C1] ? hrtimer_interrupt+0x980/0x980 [ 216.099478][ C1] ? ktime_get_update_offsets_now+0x407/0x420 [ 216.105580][ C1] hrtimer_interrupt+0x392/0x980 [ 216.110562][ C1] __sysvec_apic_timer_interrupt+0x13b/0x4b0 [ 216.116569][ C1] sysvec_apic_timer_interrupt+0x9b/0xc0 [ 216.122835][ C1] </IRQ> [ 216.125777][ C1] <TASK> [ 216.128717][ C1] asm_sysvec_apic_timer_interrupt+0x16/0x20 [ 216.134723][ C1] RIP: 0010:lock_acquire+0x252/0x4f0 [ 216.140032][ C1] Code: 2b 00 74 08 4c 89 f7 e8 0c ac 67 00 f6 44 24 61 02 0f 85 84 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 44 25 00 00 00 00 00 43 c7 44 25 09 00 00 00 00 43 c7 44 25 [ 216.159773][ C1] RSP: 0018:ffffc90002faf9c0 EFLAGS: 00000206 [ 216.165878][ C1] RAX: 0000000000000001 RBX: 1ffff920005f5f44 RCX: ffffffff81639d52 [ 216.173874][ C1] RDX: dffffc0000000000 RSI: ffffffff8aab3d00 RDI: ffffffff8af9fa80 [ 216.181867][ C1] RBP: ffffc90002fafb18 R08: dffffc0000000000 R09: fffffbfff2131e1f [ 216.189968][ C1] R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff920005f5f40 [ 216.197970][ C1] R13: dffffc0000000000 R14: ffffc90002fafa20 R15: 0000000000000246 [ 216.206239][ C1] ? validate_chain+0x112/0x5930 [ 216.211226][ C1] ? read_lock_is_recursive+0x10/0x10 [ 216.216676][ C1] ? __might_sleep+0xc0/0xc0 [ 216.221328][ C1] ? print_irqtrace_events+0x210/0x210 [ 216.226849][ C1] ? rcu_is_watching+0x11/0xa0 [ 216.231733][ C1] ? asm_sysvec_apic_timer_interrupt+0x16/0x20 [ 216.237923][ C1] ? lockdep_hardirqs_on+0x94/0x130 [ 216.243154][ C1] __might_fault+0xb4/0x110 [ 216.247712][ C1] ? __might_fault+0x91/0x110 [ 216.252409][ C1] __rseq_handle_notify_resume+0x11b/0x1250 [ 216.258322][ C1] ? trace_hardirqs_on+0x30/0x80 [ 216.263288][ C1] ? _raw_spin_unlock_irq+0x25/0x40 [ 216.268502][ C1] ? get_signal+0x1418/0x14e0 [ 216.273545][ C1] ? __bpf_trace_rseq_ip_fixup+0x40/0x40 [ 216.280035][ C1] arch_do_signal_or_restart+0x27d/0x1890 [ 216.285795][ C1] ? __do_compat_sys_x32_rt_sigreturn+0x250/0x250 [ 216.292237][ C1] ? __might_fault+0xb4/0x110 [ 216.296944][ C1] ? _copy_from_user+0x10f/0x170 [ 216.301902][ C1] ? restore_altstack+0x274/0x400 [ 216.306951][ C1] ? get_sigframe_size+0x10/0x10 [ 216.311917][ C1] ? __ia32_sys_sigaltstack+0x60/0x60 [ 216.317321][ C1] ? __do_sys_rt_sigreturn+0x19d/0x250 [ 216.322802][ C1] ? exit_to_user_mode_loop+0x39/0x130 [ 216.328283][ C1] exit_to_user_mode_loop+0x97/0x130 [ 216.333723][ C1] exit_to_user_mode_prepare+0xb1/0x140 [ 216.339310][ C1] syscall_exit_to_user_mode+0x5d/0x240 [ 216.344901][ C1] do_syscall_64+0x47/0xb0 [ 216.349340][ C1] ? clear_bhb_loop+0x15/0x70 [ 216.354042][ C1] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 216.359953][ C1] RIP: 0033:0x7fa141bb1229 [ 216.364409][ C1] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 d1 1d 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 [ 216.384045][ C1] RSP: 002b:00007ffe0d2f29e8 EFLAGS: 00000246 [ 216.390146][ C1] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 00007fa141bb1229 [ 216.398405][ C1] RDX: 000040000006b000 RSI: 0000000000000000 RDI: 0000000000000000 [ 216.406744][ C1] RBP: 0000000000000000 R08: 00007fa141b68990 R09: 00007fa141b68990 [ 216.414941][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fa141c07ebc [ 216.423033][ C1] R13: 00007fa141c0115e R14: 00007ffe0d2f2a20 R15: 0000000000000000 [ 216.431052][ C1] </TASK>