Warning: Permanently added '10.128.0.252' (ED25519) to the list of known hosts. executing program [ 167.478295][ C0] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [ 167.485377][ C0] (detected by 0, t=10502 jiffies, g=5277, q=52) [ 167.491810][ C0] rcu: All QSes seen, last rcu_preempt kthread activity 10497 (4294953867-4294943370), jiffies_till_next_fqs=1, root ->qsmask 0x0 [ 167.505217][ C0] rcu: rcu_preempt kthread starved for 10497 jiffies! g5277 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 [ 167.516338][ C0] rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. [ 167.526340][ C0] rcu: RCU grace-period kthread stack dump: [ 167.532238][ C0] task:rcu_preempt state:R running task stack:26752 pid: 15 ppid: 2 flags:0x00004000 [ 167.543061][ C0] Call Trace: [ 167.546357][ C0] [ 167.549302][ C0] __schedule+0x12c4/0x45b0 [ 167.553844][ C0] ? _raw_spin_unlock_irqrestore+0x8b/0x130 [ 167.559763][ C0] ? _raw_spin_unlock_irqrestore+0xd9/0x130 [ 167.565683][ C0] ? __mod_timer+0xa8e/0xeb0 [ 167.570298][ C0] ? release_firmware_map_entry+0x190/0x190 [ 167.576207][ C0] ? mod_timer_pending+0x20/0x20 [ 167.581163][ C0] ? lockdep_softirqs_off+0x420/0x420 [ 167.586586][ C0] schedule+0x11b/0x1f0 [ 167.590760][ C0] schedule_timeout+0x1b9/0x300 [ 167.595622][ C0] ? console_conditional_schedule+0x40/0x40 [ 167.601534][ C0] ? update_process_times+0x200/0x200 [ 167.606933][ C0] ? prepare_to_swait_event+0x321/0x340 [ 167.612507][ C0] rcu_gp_fqs_loop+0x2bf/0x1080 [ 167.617383][ C0] ? dyntick_save_progress_counter+0x230/0x230 [ 167.623574][ C0] ? rcu_gp_init+0x1140/0x1140 [ 167.628359][ C0] ? finish_swait+0xc5/0x1d0 [ 167.632977][ C0] rcu_gp_kthread+0xa4/0x360 [ 167.637594][ C0] ? _raw_spin_unlock+0x40/0x40 [ 167.642464][ C0] ? rcu_report_qs_rsp+0x1a0/0x1a0 [ 167.647600][ C0] ? _raw_spin_unlock_irqrestore+0xd9/0x130 [ 167.653518][ C0] ? __kthread_parkme+0x15c/0x1c0 [ 167.658736][ C0] kthread+0x3f6/0x4f0 [ 167.662821][ C0] ? rcu_report_qs_rsp+0x1a0/0x1a0 [ 167.667952][ C0] ? kthread_blkcg+0xd0/0xd0 [ 167.672556][ C0] ret_from_fork+0x1f/0x30 [ 167.677002][ C0] [ 167.680025][ C0] rcu: Stack dump where RCU GP kthread last ran: [ 167.686349][ C0] NMI backtrace for cpu 0 [ 167.690695][ C0] CPU: 0 PID: 4189 Comm: syz-executor296 Not tainted 5.15.175-syzkaller #0 [ 167.699290][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 167.709356][ C0] Call Trace: [ 167.712727][ C0] [ 167.715576][ C0] dump_stack_lvl+0x1e3/0x2d0 [ 167.720272][ C0] ? io_uring_drop_tctx_refs+0x1a0/0x1a0 [ 167.725916][ C0] ? panic+0x860/0x860 [ 167.730021][ C0] nmi_cpu_backtrace+0x46a/0x4a0 [ 167.734989][ C0] ? __wake_up_klogd+0xd5/0x100 [ 167.739888][ C0] ? nmi_trigger_cpumask_backtrace+0x2a0/0x2a0 [ 167.746055][ C0] ? _printk+0xd1/0x120 [ 167.750251][ C0] ? cpu_online+0x1f/0x40 [ 167.754593][ C0] ? panic+0x860/0x860 [ 167.758681][ C0] ? arch_trigger_cpumask_backtrace+0x10/0x10 [ 167.764764][ C0] nmi_trigger_cpumask_backtrace+0x181/0x2a0 [ 167.770779][ C0] rcu_check_gp_kthread_starvation+0x1d2/0x240 [ 167.776961][ C0] print_other_cpu_stall+0x137a/0x14d0 [ 167.782457][ C0] ? print_cpu_stall+0x600/0x600 [ 167.787410][ C0] ? __lock_acquire+0x1ff0/0x1ff0 [ 167.792455][ C0] ? do_raw_spin_unlock+0x137/0x8b0 [ 167.797670][ C0] rcu_sched_clock_irq+0xa38/0x1150 [ 167.802891][ C0] ? rcutree_dead_cpu+0x20/0x20 [ 167.807754][ C0] ? hrtimer_run_queues+0x163/0x450 [ 167.812963][ C0] ? account_process_tick+0x232/0x3a0 [ 167.818350][ C0] update_process_times+0x196/0x200 [ 167.823565][ C0] tick_sched_timer+0x386/0x550 [ 167.828465][ C0] ? tick_setup_sched_timer+0x2d0/0x2d0 [ 167.834026][ C0] __hrtimer_run_queues+0x55b/0xcf0 [ 167.839254][ C0] ? hrtimer_interrupt+0x980/0x980 [ 167.844404][ C0] ? ktime_get_update_offsets_now+0x407/0x420 [ 167.850493][ C0] hrtimer_interrupt+0x392/0x980 [ 167.855519][ C0] __sysvec_apic_timer_interrupt+0x13b/0x4b0 [ 167.861522][ C0] sysvec_apic_timer_interrupt+0x9b/0xc0 [ 167.867171][ C0] [ 167.870107][ C0] [ 167.873043][ C0] asm_sysvec_apic_timer_interrupt+0x16/0x20 [ 167.879040][ C0] RIP: 0010:_raw_spin_unlock_irq+0x25/0x40 [ 167.884865][ C0] Code: 31 61 f6 ff 90 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 1e 65 1a f7 48 89 df e8 76 b9 1b f7 e8 21 75 3e f7 fb bf 01 00 00 00 96 fe 0e f7 65 8b 05 a7 e1 b9 75 85 c0 74 02 5b c3 e8 74 fe b7 [ 167.904480][ C0] RSP: 0018:ffffc90002f4fbc0 EFLAGS: 00000282 [ 167.910569][ C0] RAX: 6923d2e957d3cc00 RBX: ffff88802a254a00 RCX: ffffffff96a8ff03 [ 167.918639][ C0] RDX: dffffc0000000000 RSI: ffffffff8aab2b80 RDI: 0000000000000001 [ 167.926623][ C0] RBP: 0000000000000000 R08: ffffffff81870360 R09: ffffed100544a941 [ 167.934611][ C0] R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000021 [ 167.942605][ C0] R13: dffffc0000000000 R14: ffff88802a254e98 R15: ffff88802a254a00 [ 167.950695][ C0] ? trace_hardirqs_on+0x30/0x80 [ 167.955662][ C0] get_signal+0x13ee/0x14e0 [ 167.960200][ C0] arch_do_signal_or_restart+0xc3/0x1890 [ 167.965863][ C0] ? __do_compat_sys_x32_rt_sigreturn+0x250/0x250 [ 167.972300][ C0] ? __might_fault+0xb4/0x110 [ 167.977003][ C0] ? _copy_from_user+0x10f/0x170 [ 167.981962][ C0] ? restore_altstack+0x274/0x400 [ 167.987092][ C0] ? get_sigframe_size+0x10/0x10 [ 167.992048][ C0] ? __ia32_sys_sigaltstack+0x60/0x60 [ 167.997495][ C0] ? __do_sys_rt_sigreturn+0x19d/0x250 [ 168.003009][ C0] ? exit_to_user_mode_loop+0x39/0x130 [ 168.008487][ C0] exit_to_user_mode_loop+0x97/0x130 [ 168.013787][ C0] exit_to_user_mode_prepare+0xb1/0x140 [ 168.019357][ C0] syscall_exit_to_user_mode+0x5d/0x240 [ 168.024925][ C0] do_syscall_64+0x47/0xb0 [ 168.029355][ C0] ? clear_bhb_loop+0x15/0x70 [ 168.034055][ C0] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 168.039965][ C0] RIP: 0033:0x7f8005f6d859 [ 168.044405][ 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 [ 168.064027][ C0] RSP: 002b:00007ffd1665af28 EFLAGS: 00000246 [ 168.070113][ C0] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 00007f8005f6d859 [ 168.078126][ C0] RDX: 000000002006b000 RSI: 0000000000000000 RDI: 0000000000000000 [ 168.086286][ C0] RBP: 0000000000000000 R08: 00007f8005f2d990 R09: 00007f8005f2d990 [ 168.094279][ C0] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f8005fcb31c [ 168.102276][ C0] R13: 00007f8005fc5106 R14: 00007ffd1665af60 R15: 0000000000000000 [ 168.110285][ C0]