INFO: rcu detected stall in kvm_vm

Kernel	Title	Rank 🛈	Count	Last	Reported	Patched	Status
upstream	INFO: rcu detected stall in kvm_vm_release (2) fs	1	1	909d	909d	0/29	auto-obsoleted due to no activity on 2024/01/02 09:35
linux-6.1	INFO: rcu detected stall in kvm_vm_release	1	1	41d	41d	0/3	upstream: reported on 2026/02/18 08:30
upstream	INFO: rcu detected stall in kvm_vm_release (3) bpf net	1	1	667d	667d	0/29	auto-obsoleted due to no activity on 2024/08/30 21:11

rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: (detected by 0, t=10861 jiffies, g=286465, q=7557) rcu: All QSes seen, last rcu_preempt kthread activity 10861 (4295216617-4295205756), jiffies_till_next_fqs=1, root ->qsmask 0x0 syz-executor.2 R running task 27920 2906 7240 0x80004006 Call Trace: <IRQ> sched_show_task kernel/sched/core.c:5956 [inline] sched_show_task.cold+0x2e2/0x343 kernel/sched/core.c:5931 print_other_cpu_stall kernel/rcu/tree_stall.h:430 [inline] check_cpu_stall kernel/rcu/tree_stall.h:558 [inline] rcu_pending kernel/rcu/tree.c:3225 [inline] rcu_sched_clock_irq.cold+0xb9b/0xcfa kernel/rcu/tree.c:2296 update_process_times+0x25/0x60 kernel/time/timer.c:1727 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:176 tick_sched_timer+0x4e/0x140 kernel/time/tick-sched.c:1320 __run_hrtimer kernel/time/hrtimer.c:1520 [inline] __hrtimer_run_queues+0x5ca/0xed0 kernel/time/hrtimer.c:1584 hrtimer_interrupt+0x312/0x770 kernel/time/hrtimer.c:1646 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1113 [inline] smp_apic_timer_interrupt+0x15b/0x600 arch/x86/kernel/apic/apic.c:1138 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 </IRQ> RIP: 0010:__read_once_size include/linux/compiler.h:199 [inline] RIP: 0010:csd_lock_wait kernel/smp.c:109 [inline] RIP: 0010:smp_call_function_single+0x188/0x480 kernel/smp.c:311 Code: 00 e8 bc d1 0a 00 48 8b 4c 24 08 48 8b 54 24 10 48 8d 74 24 40 8b 7c 24 1c e8 d4 f9 ff ff 41 89 c5 eb 07 e8 9a d1 0a 00 f3 90 <44> 8b 64 24 58 31 ff 41 83 e4 01 44 89 e6 e8 f5 d2 0a 00 45 85 e4 RSP: 0018:ffffc9001639f4a0 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff88804b6fa200 RBX: 1ffff92002c73e98 RCX: ffffffff816862fb RDX: 0000000000000000 RSI: ffffffff816862e6 RDI: 0000000000000005 RBP: ffffc9001639f570 R08: ffff88804b6fa200 R09: ffffed1015ce7121 R10: ffff8880ae738907 R11: ffffed1015ce7120 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000 loaded_vmcs_clear arch/x86/kvm/vmx/vmx.c:706 [inline] vmx_vcpu_load_vmcs+0x6af/0x960 arch/x86/kvm/vmx/vmx.c:1315 vmx_vcpu_load+0x8b/0x650 arch/x86/kvm/vmx/vmx.c:1371 kvm_arch_vcpu_load+0x110/0x7d0 arch/x86/kvm/x86.c:3559 __fire_sched_in_preempt_notifiers kernel/sched/core.c:3012 [inline] fire_sched_in_preempt_notifiers kernel/sched/core.c:3018 [inline] finish_task_switch+0x275/0x750 kernel/sched/core.c:3210 context_switch kernel/sched/core.c:3370 [inline] __schedule+0x93f/0x1ff0 kernel/sched/core.c:4083 preempt_schedule_common+0x4a/0xc0 kernel/sched/core.c:4239 preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:50 vcpu_load+0x81/0x90 arch/x86/kvm/../../../virt/kvm/kvm_main.c:213 kvm_unload_vcpu_mmu arch/x86/kvm/x86.c:9784 [inline] kvm_free_vcpus arch/x86/kvm/x86.c:9799 [inline] kvm_arch_destroy_vm+0x153/0x510 arch/x86/kvm/x86.c:9901 kvm_destroy_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:807 [inline] kvm_put_kvm+0x58f/0xc40 arch/x86/kvm/../../../virt/kvm/kvm_main.c:828 kvm_vm_release+0x3f/0x50 arch/x86/kvm/../../../virt/kvm/kvm_main.c:851 __fput+0x33e/0x880 fs/file_table.c:280 task_work_run+0xf4/0x1b0 kernel/task_work.c:123 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0xb34/0x2dd0 kernel/exit.c:796 do_group_exit+0x125/0x340 kernel/exit.c:894 get_signal+0x47b/0x24e0 kernel/signal.c:2739 do_signal+0x81/0x2240 arch/x86/kernel/signal.c:784 exit_to_usermode_loop+0x26c/0x360 arch/x86/entry/common.c:161 prepare_exit_to_usermode arch/x86/entry/common.c:196 [inline] syscall_return_slowpath arch/x86/entry/common.c:279 [inline] do_syscall_64+0x6b1/0x7d0 arch/x86/entry/common.c:305 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45ca29 Code: 48 8d 3d 32 36 23 01 e8 f5 22 00 00 eb 98 48 8d 3d 2c 36 23 01 e8 e7 22 00 00 e9 70 ff ff ff 48 8d 3d 3b 36 23 01 e8 d6 22 00 <00> e9 44 ff ff ff 48 8d 3d 22 36 23 01 e8 c5 22 00 00 e9 18 ff ff RSP: 002b:00007fef9c20dcf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 000000000078bf08 RCX: 000000000045ca29 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000078bf08 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000078bf0c R13: 00007ffc4178363f R14: 00007fef9c20e9c0 R15: 000000000078bf0c rcu: rcu_preempt kthread starved for 10861 jiffies! g286465 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 rcu: RCU grace-period kthread stack dump: rcu_preempt R running task 28848 10 2 0x80004000 Call Trace: