INFO: rcu detected stall in kvm_dev

Kernel	Title	Rank 🛈	Count	Last	Reported	Patched	Status
linux-6.1	INFO: rcu detected stall in kvm_dev_ioctl	1	1	395d	395d	0/3	auto-obsoleted due to no activity on 2024/10/01 03:25
upstream	INFO: rcu detected stall in kvm_dev_ioctl (5) mm	1	9	159d	450d	0/29	auto-obsoleted due to no activity on 2025/05/14 19:07
upstream	INFO: rcu detected stall in kvm_dev_ioctl (4) mm	1	1	968d	968d	0/29	auto-obsoleted due to no activity on 2023/04/10 15:34
upstream	INFO: rcu detected stall in kvm_dev_ioctl (3) kernel	1	3	2022d	2022d	0/29	closed as invalid on 2020/01/09 08:13
upstream	INFO: rcu detected stall in kvm_dev_ioctl kernel	1	4	2058d	2059d	0/29	closed as invalid on 2019/12/04 14:04

rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P8472 (detected by 0, t=10503 jiffies, g=6549, q=171) syz-executor.0 R running task 27864 8472 8453 0x0000400e Call Trace: <IRQ> sched_show_task+0x40f/0x560 kernel/sched/core.c:5954 rcu_print_detail_task_stall_rnp kernel/rcu/tree_stall.h:190 [inline] print_other_cpu_stall kernel/rcu/tree_stall.h:398 [inline] check_cpu_stall kernel/rcu/tree_stall.h:538 [inline] rcu_pending kernel/rcu/tree.c:2827 [inline] rcu_sched_clock_irq+0x16b1/0x1ad0 kernel/rcu/tree.c:2271 update_process_times+0x12d/0x180 kernel/time/timer.c:1726 tick_sched_handle kernel/time/tick-sched.c:167 [inline] tick_sched_timer+0x263/0x420 kernel/time/tick-sched.c:1310 __run_hrtimer kernel/time/hrtimer.c:1517 [inline] __hrtimer_run_queues+0x403/0x840 kernel/time/hrtimer.c:1579 hrtimer_interrupt+0x38c/0xda0 kernel/time/hrtimer.c:1641 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1110 [inline] smp_apic_timer_interrupt+0x109/0x280 arch/x86/kernel/apic/apic.c:1135 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 </IRQ> RIP: 0010:free_thread_stack+0x151/0x590 kernel/fork.c:280 Code: 31 f6 e8 02 8d 6f 00 43 80 3c 2e 00 74 08 4c 89 e7 e8 73 94 6a 00 49 8b 1c 24 48 83 c3 08 48 89 d8 48 c1 e8 03 42 80 3c 28 00 <74> 08 48 89 df e8 55 94 6a 00 48 8b 3b be fc ff ff ff e8 28 04 00 RSP: 0018:ffffc90002217a08 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 1ffff11011e7fdf1 RBX: ffff88808f3fef88 RCX: 0000000000000000 RDX: ffffc90001ef9000 RSI: 0000000000000000 RDI: ffffea0002559600 RBP: ffffc90002217a40 R08: dffffc0000000000 R09: fffffbfff124248a R10: fffffbfff124248a R11: 0000000000000000 R12: ffff88809e2e9020 R13: dffffc0000000000 R14: 1ffff11013c5d204 R15: ffff88809faf55b8 release_task_stack kernel/fork.c:440 [inline] put_task_stack+0xa3/0x130 kernel/fork.c:451 finish_task_switch+0x3f1/0x550 kernel/sched/core.c:3256 context_switch kernel/sched/core.c:3388 [inline] __schedule+0x9a8/0xcc0 kernel/sched/core.c:4081 preempt_schedule_notrace+0xdb/0x120 kernel/sched/core.c:4309 ___preempt_schedule_notrace+0x16/0x27 arch/x86/entry/thunk_64.S:51 rcu_is_watching+0x82/0xa0 kernel/rcu/tree.c:923 rcu_read_unlock include/linux/rcupdate.h:667 [inline] memcg_kmem_get_cache+0x2e8/0x570 mm/memcontrol.c:2807 slab_pre_alloc_hook mm/slab.h:572 [inline] slab_alloc_node mm/slab.c:3227 [inline] kmem_cache_alloc_node_trace+0xa2/0x2d0 mm/slab.c:3593 __do_kmalloc_node mm/slab.c:3615 [inline] __kmalloc_node+0x3c/0x60 mm/slab.c:3623 kmalloc_node include/linux/slab.h:579 [inline] kvmalloc_node+0xcc/0x130 mm/util.c:574 kvmalloc include/linux/mm.h:655 [inline] kvzalloc include/linux/mm.h:663 [inline] kvm_alloc_memslots arch/x86/kvm/../../../virt/kvm/kvm_main.c:567 [inline] kvm_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:706 [inline] kvm_dev_ioctl_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:3519 [inline] kvm_dev_ioctl+0x3c2/0x2110 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3571 do_vfs_ioctl+0x70b/0x1a30 fs/ioctl.c:47 ksys_ioctl fs/ioctl.c:749 [inline] __do_sys_ioctl fs/ioctl.c:756 [inline] __se_sys_ioctl fs/ioctl.c:754 [inline] __x64_sys_ioctl+0xe3/0x120 fs/ioctl.c:754 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45af49 Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f9362834c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045af49 RDX: 0000000000000000 RSI: 000000000000ae01 RDI: 0000000000000003 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f93628356d4 R13: 00000000004c44de R14: 00000000004dadb0 R15: 00000000ffffffff rcu: rcu_preempt kthread starved for 10454 jiffies! g6549 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 rcu: RCU grace-period kthread stack dump: rcu_preempt R running task 28984 10 2 0x80004000 Call Trace: context_switch kernel/sched/core.c:3385 [inline] __schedule+0x9a0/0xcc0 kernel/sched/core.c:4081 schedule+0x181/0x210 kernel/sched/core.c:4155 schedule_timeout+0x14f/0x240 kernel/time/timer.c:1895 rcu_gp_fqs_loop kernel/rcu/tree.c:1661 [inline] rcu_gp_kthread+0xed8/0x1770 kernel/rcu/tree.c:1821 kthread+0x332/0x350 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352