Warning: Permanently added '10.128.1.218' (ED25519) to the list of known hosts. executing program executing program executing program executing program syzkaller login: [ 187.064889][ C0] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [ 187.072033][ C0] rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P969/1:b..l [ 187.080109][ C0] rcu: (detected by 0, t=10503 jiffies, g=8469, q=73 ncpus=2) [ 187.087692][ C0] task:kworker/1:2 state:R running task stack:25832 pid:969 ppid:2 flags:0x00004000 [ 187.098897][ C0] Workqueue: events_power_efficient gc_worker [ 187.105037][ C0] Call Trace: [ 187.108340][ C0] [ 187.111310][ C0] __schedule+0x14d2/0x44d0 [ 187.115873][ C0] ? is_dynamic_key+0x260/0x260 [ 187.120777][ C0] ? asan.module_dtor+0x20/0x20 [ 187.125675][ C0] ? mark_lock+0x94/0x320 [ 187.130048][ C0] ? lockdep_hardirqs_on_prepare+0x400/0x760 [ 187.136072][ C0] ? preempt_schedule_irq+0xaa/0x140 [ 187.141409][ C0] preempt_schedule_irq+0xb5/0x140 [ 187.146564][ C0] ? preempt_schedule_notrace+0x110/0x110 [ 187.152319][ C0] ? lock_chain_count+0x20/0x20 [ 187.157200][ C0] ? rcu_irq_exit_check_preempt+0xdf/0x210 [ 187.163040][ C0] irqentry_exit+0x67/0x70 [ 187.167510][ C0] asm_sysvec_reschedule_ipi+0x1a/0x20 [ 187.173004][ C0] RIP: 0010:__sanitizer_cov_trace_pc+0x17/0x60 [ 187.179195][ C0] Code: 48 8b 3d 0c 00 c5 0c 48 89 de 5b e9 a3 8a 56 00 cc cc cc f3 0f 1e fa 48 8b 04 24 65 48 8b 0d 20 28 7e 7e 65 8b 15 21 28 7e 7e <81> e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 1c 16 00 00 [ 187.198837][ C0] RSP: 0018:ffffc90004467a58 EFLAGS: 00000202 [ 187.204955][ C0] RAX: ffffffff88ace1d9 RBX: 000000000002926c RCX: ffff88802249da00 [ 187.212954][ C0] RDX: 0000000080000000 RSI: ffffffff8afc6ae0 RDI: ffffffff8afc6aa0 [ 187.220954][ C0] RBP: ffffc90004467bb0 R08: ffffffff90da8597 R09: 1ffffffff21b50b2 [ 187.228954][ C0] R10: dffffc0000000000 R11: fffffbfff21b50b3 R12: ffff88802249da00 [ 187.236949][ C0] R13: dffffc0000000000 R14: 0000000000000001 R15: 00000000000524d9 [ 187.244999][ C0] ? gc_worker+0xcc9/0x14b0 [ 187.249551][ C0] gc_worker+0xcc9/0x14b0 [ 187.253949][ C0] ? gc_worker+0x269/0x14b0 [ 187.258487][ C0] ? init_conntrack+0xee0/0xee0 [ 187.263366][ C0] ? _raw_spin_unlock_irq+0x23/0x50 [ 187.268617][ C0] ? process_scheduled_works+0x957/0x15b0 [ 187.274370][ C0] ? process_scheduled_works+0x957/0x15b0 [ 187.280127][ C0] process_scheduled_works+0xa45/0x15b0 [ 187.285739][ C0] ? assign_work+0x400/0x400 [ 187.290373][ C0] ? assign_work+0x39e/0x400 [ 187.295042][ C0] worker_thread+0xa55/0xfc0 [ 187.299696][ C0] ? _raw_spin_unlock_irqrestore+0xae/0x110 [ 187.305628][ C0] ? _raw_spin_unlock+0x40/0x40 [ 187.310524][ C0] ? _raw_spin_unlock_irqrestore+0x86/0x110 [ 187.316472][ C0] kthread+0x2fa/0x390 [ 187.320573][ C0] ? pr_cont_work+0x560/0x560 [ 187.325317][ C0] ? kthread_blkcg+0xd0/0xd0 [ 187.329938][ C0] ret_from_fork+0x48/0x80 [ 187.334378][ C0] ? kthread_blkcg+0xd0/0xd0 [ 187.338995][ C0] ret_from_fork_asm+0x11/0x20 [ 187.343826][ C0] [ 187.346871][ C0] rcu: rcu_preempt kthread starved for 10526 jiffies! g8469 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 [ 187.358001][ C0] rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. [ 187.368077][ C0] rcu: RCU grace-period kthread stack dump: [ 187.373988][ C0] task:rcu_preempt state:R running task stack:27088 pid:17 ppid:2 flags:0x00004000 [ 187.384803][ C0] Call Trace: [ 187.388107][ C0] [ 187.391065][ C0] __schedule+0x14d2/0x44d0 [ 187.395619][ C0] ? _raw_spin_unlock_irqrestore+0x86/0x110 [ 187.401541][ C0] ? lockdep_hardirqs_on+0x98/0x150 [ 187.406766][ C0] ? _raw_spin_unlock_irqrestore+0xae/0x110 [ 187.412689][ C0] ? asan.module_dtor+0x20/0x20 [ 187.417575][ C0] ? enqueue_timer+0x225/0x530 [ 187.422377][ C0] ? __mod_timer+0x984/0xdb0 [ 187.427026][ C0] schedule+0xbd/0x170 [ 187.431136][ C0] schedule_timeout+0x160/0x280 [ 187.436044][ C0] ? console_conditional_schedule+0x40/0x40 [ 187.441973][ C0] ? _raw_spin_unlock_irqrestore+0x86/0x110 [ 187.447896][ C0] ? update_process_times+0x1b0/0x1b0 [ 187.453313][ C0] ? prepare_to_swait_event+0x339/0x360 [ 187.458890][ C0] rcu_gp_fqs_loop+0x302/0x1560 [ 187.463780][ C0] ? rcu_gp_init+0x110e/0x1510 [ 187.468587][ C0] ? dyntick_save_progress_counter+0x2b0/0x2b0 [ 187.474784][ C0] ? rcu_gp_init+0x1510/0x1510 [ 187.479584][ C0] ? rcu_gp_cleanup+0xb4c/0xca0 [ 187.484480][ C0] ? _raw_spin_unlock_irq+0x23/0x50 [ 187.489714][ C0] ? lockdep_hardirqs_on+0x98/0x150 [ 187.494967][ C0] rcu_gp_kthread+0x99/0x380 [ 187.499603][ C0] ? rcu_report_qs_rsp+0x1a0/0x1a0 [ 187.504760][ C0] ? __kthread_parkme+0x7a/0x1c0 [ 187.509738][ C0] ? __kthread_parkme+0x162/0x1c0 [ 187.514816][ C0] kthread+0x2fa/0x390 [ 187.518910][ C0] ? rcu_report_qs_rsp+0x1a0/0x1a0 [ 187.524059][ C0] ? kthread_blkcg+0xd0/0xd0 [ 187.528677][ C0] ret_from_fork+0x48/0x80 [ 187.533120][ C0] ? kthread_blkcg+0xd0/0xd0 [ 187.537743][ C0] ret_from_fork_asm+0x11/0x20 [ 187.542553][ C0] [ 187.545593][ C0] rcu: Stack dump where RCU GP kthread last ran: [ 187.551954][ C0] Sending NMI from CPU 0 to CPUs 1: [ 187.557203][ C1] NMI backtrace for cpu 1 [ 187.557224][ C1] CPU: 1 PID: 5795 Comm: syz-executor267 Not tainted syzkaller #0 [ 187.557239][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 [ 187.557248][ C1] RIP: 0010:lapic_next_event+0x11/0x20 [ 187.557272][ C1] Code: 90 06 c6 05 00 c1 90 0e 01 0f b6 05 d9 aa 90 0e c3 0f 1f 84 00 00 00 00 00 f3 0f 1e fa 48 89 fe bf 80 03 00 00 e8 1f 1b 01 00 <31> c0 c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 f3 0f 1e fa 53 48 83 [ 187.557285][ C1] RSP: 0018:ffffc900001f0e60 EFLAGS: 00000046 [ 187.557299][ C1] RAX: 0000000000074d2a RBX: ffff8880b8f28280 RCX: 0000000000000838 [ 187.557309][ C1] RDX: 0000000000000000 RSI: 0000000000074d2a RDI: 0000000000000838 [ 187.557318][ C1] RBP: 0000000000000000 R08: ffffffff8e4a8d6f R09: 1ffffffff1c951ad [ 187.557329][ C1] R10: dffffc0000000000 R11: fffffbfff1c951ae R12: dffffc0000000000 [ 187.557356][ C1] R13: 0000000010005df3 R14: 0000000000074d2a R15: 0000000000000020 [ 187.557365][ C1] FS: 00007fc9e0fc46c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000 [ 187.557378][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 187.557387][ C1] CR2: 0000200000000058 CR3: 0000000072260000 CR4: 00000000003506e0 [ 187.557400][ C1] Call Trace: [ 187.557405][ C1] [ 187.557410][ C1] clockevents_program_event+0x1c0/0x310 [ 187.557432][ C1] hrtimer_interrupt+0x5a1/0x9c0 [ 187.557460][ C1] __sysvec_apic_timer_interrupt+0xfb/0x3b0 [ 187.557479][ C1] sysvec_apic_timer_interrupt+0x9f/0xc0 [ 187.557503][ C1] [ 187.557506][ C1] [ 187.557511][ C1] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 187.557528][ C1] RIP: 0010:__task_pid_nr_ns+0x165/0x470 [ 187.557548][ C1] Code: f0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 51 8e 84 00 4d 8b 36 eb 08 e8 f7 32 2d 00 45 31 f6 31 ff 89 ee e8 9b 36 2d 00 <85> ed 74 48 49 81 c7 10 09 00 00 4c 89 f8 48 c1 e8 03 42 80 3c 28 [ 187.557559][ C1] RSP: 0018:ffffc9000454fed8 EFLAGS: 00000293 [ 187.557570][ C1] RAX: ffffffff81585ca5 RBX: ffff888027ce1b40 RCX: 0000000000000000 [ 187.557580][ C1] RDX: ffff888028dfbc00 RSI: 0000000000000001 RDI: 0000000000000000 [ 187.557589][ C1] RBP: 0000000000000001 R08: dffffc0000000000 R09: 1ffffffff21b50a0 [ 187.557598][ C1] R10: dffffc0000000000 R11: fffffbfff21b50a1 R12: 0000000000000001 [ 187.557608][ C1] R13: dffffc0000000000 R14: ffffffff8cbdf480 R15: ffff888028dfbc00 [ 187.557622][ C1] ? __task_pid_nr_ns+0x165/0x470 [ 187.557644][ C1] ? __task_pid_nr_ns+0x165/0x470 [ 187.557662][ C1] ? __task_pid_nr_ns+0x28/0x470 [ 187.557682][ C1] __ia32_sys_getpid+0x1d/0x20 [ 187.557701][ C1] do_syscall_64+0x55/0xb0 [ 187.557719][ C1] ? clear_bhb_loop+0x40/0x90 [ 187.557735][ C1] ? clear_bhb_loop+0x40/0x90 [ 187.557751][ C1] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 187.557766][ C1] RIP: 0033:0x7fc9e100a4f7 [ 187.557781][ C1] Code: 0b e9 68 fe ff ff 48 83 c4 18 48 8d 3d 62 9f 08 00 5b 5d 41 5c 41 5d 41 5e 41 5f e9 53 b9 fd ff 0f 1f 00 b8 27 00 00 00 0f 05 0f 1f 84 00 00 00 00 00 31 f6 31 ff e9 c7 11 03 00 0f 1f 80 00 [ 187.557792][ C1] RSP: 002b:00007fc9e0fc3b88 EFLAGS: 00000206 ORIG_RAX: 0000000000000027 [ 187.557805][ C1] RAX: ffffffffffffffda RBX: 00007fc9e0fc3cf0 RCX: 00007fc9e100a4f7 [ 187.557815][ C1] RDX: 00007fc9e0fc3bc0 RSI: 00007fc9e0fc3cf0 RDI: 0000000000000021 [ 187.557824][ C1] RBP: 0000000000000000 R08: 00007fc9e0fc46c0 R09: 00007fc9e0fc46c0 [ 187.557833][ C1] R10: 0000000000000000 R11: 0000000000000206 R12: 00007fc9e108e30c [ 187.557842][ C1] R13: 0000000000000000 R14: 00007ffd126fecb0 R15: 00007ffd126fed98 [ 187.557858][ C1]