Warning: Permanently added '10.128.0.79' (ED25519) to the list of known hosts. [ 304.349770][ C0] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [ 304.356829][ C0] (detected by 0, t=10502 jiffies, g=3845, q=16) [ 304.363239][ C0] rcu: All QSes seen, last rcu_preempt kthread activity 10503 (4294967544-4294957041), jiffies_till_next_fqs=1, root ->qsmask 0x0 [ 304.376950][ C0] rcu: rcu_preempt kthread starved for 10504 jiffies! g3845 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 [ 304.388059][ C0] rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. [ 304.398824][ C0] rcu: RCU grace-period kthread stack dump: [ 304.404704][ C0] task:rcu_preempt state:R running task stack:27000 pid: 15 ppid: 2 flags:0x00004000 [ 304.415497][ C0] Call Trace: [ 304.418774][ C0] [ 304.421708][ C0] __schedule+0x12c4/0x45b0 [ 304.426336][ C0] ? _raw_spin_unlock_irqrestore+0x8b/0x130 [ 304.432449][ C0] ? _raw_spin_unlock_irqrestore+0xd9/0x130 [ 304.438357][ C0] ? __mod_timer+0xa8e/0xeb0 [ 304.443044][ C0] ? release_firmware_map_entry+0x190/0x190 [ 304.448942][ C0] ? mod_timer_pending+0x20/0x20 [ 304.453880][ C0] ? lockdep_softirqs_off+0x420/0x420 [ 304.459273][ C0] schedule+0x11b/0x1f0 [ 304.463516][ C0] schedule_timeout+0x1b9/0x300 [ 304.468370][ C0] ? console_conditional_schedule+0x40/0x40 [ 304.474271][ C0] ? update_process_times+0x200/0x200 [ 304.479648][ C0] ? prepare_to_swait_event+0x321/0x340 [ 304.485245][ C0] rcu_gp_fqs_loop+0x2bf/0x1080 [ 304.490134][ C0] ? _raw_spin_unlock_irq+0x1f/0x40 [ 304.495334][ C0] ? lockdep_hardirqs_on+0x94/0x130 [ 304.500653][ C0] ? rcu_gp_init+0xdae/0x1140 [ 304.505347][ C0] ? rcu_gp_init+0x1140/0x1140 [ 304.510118][ C0] ? finish_swait+0xc5/0x1d0 [ 304.514718][ C0] rcu_gp_kthread+0xa4/0x360 [ 304.519312][ C0] ? _raw_spin_unlock+0x40/0x40 [ 304.527467][ C0] ? rcu_report_qs_rsp+0x1a0/0x1a0 [ 304.532601][ C0] ? _raw_spin_unlock_irqrestore+0xd9/0x130 [ 304.538507][ C0] ? __kthread_parkme+0x15c/0x1c0 [ 304.543588][ C0] kthread+0x3f6/0x4f0 [ 304.547873][ C0] ? rcu_report_qs_rsp+0x1a0/0x1a0 [ 304.552987][ C0] ? kthread_blkcg+0xd0/0xd0 [ 304.557577][ C0] ret_from_fork+0x1f/0x30 [ 304.562102][ C0] [ 304.565116][ C0] rcu: Stack dump where RCU GP kthread last ran: [ 304.572508][ C0] NMI backtrace for cpu 0 [ 304.576825][ C0] CPU: 0 PID: 3543 Comm: syz-executor242 Not tainted 5.15.158-syzkaller #0 [ 304.585406][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 [ 304.596509][ C0] Call Trace: [ 304.599801][ C0] [ 304.602658][ C0] dump_stack_lvl+0x1e3/0x2d0 [ 304.607352][ C0] ? io_uring_drop_tctx_refs+0x1a0/0x1a0 [ 304.612993][ C0] ? panic+0x860/0x860 [ 304.617139][ C0] nmi_cpu_backtrace+0x46a/0x4a0 [ 304.622139][ C0] ? __wake_up_klogd+0xd5/0x100 [ 304.627094][ C0] ? nmi_trigger_cpumask_backtrace+0x2a0/0x2a0 [ 304.633256][ C0] ? _printk+0xd1/0x120 [ 304.637530][ C0] ? cpu_online+0x1f/0x40 [ 304.641877][ C0] ? panic+0x860/0x860 [ 304.646496][ C0] ? arch_trigger_cpumask_backtrace+0x10/0x10 [ 304.652631][ C0] nmi_trigger_cpumask_backtrace+0x181/0x2a0 [ 304.658646][ C0] rcu_check_gp_kthread_starvation+0x1d2/0x240 [ 304.664807][ C0] print_other_cpu_stall+0x137a/0x14d0 [ 304.670279][ C0] ? print_cpu_stall+0x600/0x600 [ 304.675230][ C0] rcu_sched_clock_irq+0xa38/0x1150 [ 304.680439][ C0] ? rcutree_dead_cpu+0x20/0x20 [ 304.685308][ C0] ? do_raw_spin_unlock+0x137/0x8b0 [ 304.690518][ C0] ? hrtimer_run_queues+0x163/0x450 [ 304.695724][ C0] ? account_process_tick+0x232/0x3a0 [ 304.701186][ C0] update_process_times+0x196/0x200 [ 304.706388][ C0] tick_sched_timer+0x386/0x550 [ 304.711275][ C0] ? tick_setup_sched_timer+0x2d0/0x2d0 [ 304.716836][ C0] __hrtimer_run_queues+0x55b/0xcf0 [ 304.722072][ C0] ? hrtimer_interrupt+0x980/0x980 [ 304.727635][ C0] ? ktime_get_update_offsets_now+0x407/0x420 [ 304.733855][ C0] hrtimer_interrupt+0x392/0x980 [ 304.738925][ C0] __sysvec_apic_timer_interrupt+0x139/0x470 [ 304.744942][ C0] sysvec_apic_timer_interrupt+0x8c/0xb0 [ 304.750751][ C0] [ 304.753798][ C0] [ 304.756733][ C0] asm_sysvec_apic_timer_interrupt+0x16/0x20 [ 304.762729][ C0] RIP: 0010:__local_bh_enable_ip+0x16c/0x1f0 [ 304.768794][ C0] Code: 8a e8 d8 62 d0 08 65 66 8b 05 50 19 b6 7e 66 85 c0 75 57 bf 01 00 00 00 e8 31 e2 09 00 e8 fc 5c 39 00 fb 65 8b 05 fc ef b4 7e <85> c0 75 05 e8 6b 0e b3 ff 48 c7 44 24 20 0e 36 e0 45 49 c7 04 1c [ 304.788412][ C0] RSP: 0018:ffffc90002e079e0 EFLAGS: 00000282 [ 304.794488][ C0] RAX: 0000000080000000 RBX: 1ffff920005c0f40 RCX: ffffffff913eef03 [ 304.802474][ C0] RDX: dffffc0000000000 RSI: ffffffff8a8b2980 RDI: ffffffff8ad8f600 [ 304.810443][ C0] RBP: ffffc90002e07a90 R08: ffffffff8186dcf0 R09: ffffed1002c723b9 [ 304.818412][ C0] R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 [ 304.826467][ C0] R13: 1ffff920005c0f44 R14: ffffc90002e07a20 R15: 0000000000000200 [ 304.834446][ C0] ? trace_hardirqs_on+0x30/0x80 [ 304.839554][ C0] ? __bpf_trace_softirq+0x10/0x10 [ 304.844673][ C0] ? local_bh_enable+0x5/0x20 [ 304.849415][ C0] ? _local_bh_enable+0xa0/0xa0 [ 304.854267][ C0] ? rcu_is_watching+0x11/0xa0 [ 304.859039][ C0] fpu__restore_sig+0x841/0x1100 [ 304.863982][ C0] ? copy_fpstate_to_sigframe+0xb40/0xb40 [ 304.869717][ C0] ? __might_fault+0xb4/0x110 [ 304.874451][ C0] restore_sigcontext+0x638/0x710 [ 304.879538][ C0] ? __do_compat_sys_x32_rt_sigreturn+0x250/0x250 [ 304.885988][ C0] ? set_current_blocked+0x40/0x40 [ 304.891142][ C0] ? lockdep_hardirqs_on_prepare+0x438/0x7a0 [ 304.897131][ C0] __do_sys_rt_sigreturn+0x190/0x250 [ 304.902425][ C0] ? x32_copy_siginfo_to_user+0x270/0x270 [ 304.908152][ C0] ? syscall_enter_from_user_mode+0x2e/0x240 [ 304.914139][ C0] ? lockdep_hardirqs_on+0x94/0x130 [ 304.919340][ C0] ? syscall_enter_from_user_mode+0x2e/0x240 [ 304.925416][ C0] do_syscall_64+0x3b/0xb0 [ 304.929833][ C0] ? clear_bhb_loop+0x15/0x70 [ 304.934512][ C0] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 304.940418][ C0] RIP: 0033:0x7fe54b9dee79 [ 304.944847][ C0] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 18 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 [ 304.964457][ C0] RSP: 002b:00007ffd9385eeb8 EFLAGS: 00000246 [ 304.970538][ C0] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 00007fe54b9dee79 [ 304.978507][ C0] RDX: 000000002006b000 RSI: 0000000000000000 RDI: 0000000000000000 [ 304.986478][ C0] RBP: 00000000000f4240 R08: 0000000000000000 R09: 0000000000000000 [ 304.994533][ C0] R10: 0000000000000000 R11: 0000000000000246 R12: 0000555556c7d370 [ 305.002503][ C0] R13: 0000000000000000 R14: 00007ffd9385ef30 R15: 00007ffd9385ef20 [ 305.010487][ C0]