kvm [16108]: vcpu0, guest rIP: 0x145 Hyper-V unhandled rdmsr: 0x40000046 kvm [16108]: vcpu0, guest rIP: 0x145 Hyper-V unhandled rdmsr: 0x40000064 kvm [16108]: vcpu0, guest rIP: 0x145 Hyper-V unhandled rdmsr: 0x40000068 INFO: rcu_bh detected stalls on CPUs/tasks: (detected by 0, t=10502 jiffies, g=-217, c=-218, q=11) All QSes seen, last rcu_bh kthread activity 10472 (4295046963-4295036491), jiffies_till_next_fqs=1, root ->qsmask 0x0 syz-executor.5 R running task 29280 16126 6368 0x00000008 Call Trace: sched_show_task kernel/sched/core.c:5168 [inline] sched_show_task.cold+0x2e3/0x347 kernel/sched/core.c:5143 print_other_cpu_stall kernel/rcu/tree.c:1501 [inline] check_cpu_stall kernel/rcu/tree.c:1616 [inline] __rcu_pending kernel/rcu/tree.c:3390 [inline] rcu_pending kernel/rcu/tree.c:3452 [inline] rcu_check_callbacks.cold+0xd3f/0xdaa kernel/rcu/tree.c:2792 update_process_times+0x29/0x60 kernel/time/timer.c:1590 tick_sched_handle+0x7d/0x150 kernel/time/tick-sched.c:165 tick_sched_timer+0x3e/0x120 kernel/time/tick-sched.c:1223 __run_hrtimer kernel/time/hrtimer.c:1223 [inline] __hrtimer_run_queues+0x25c/0xbb0 kernel/time/hrtimer.c:1287 hrtimer_interrupt+0x1e6/0x5e0 kernel/time/hrtimer.c:1321 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1075 [inline] smp_apic_timer_interrupt+0x117/0x5e0 arch/x86/kernel/apic/apic.c:1100 apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792 RIP: 0010:memcmp+0x5e/0xb0 lib/string.c:861 RSP: 0018:ffff8880aea078a0 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff10 RAX: 0000000000000081 RBX: ffff8880aea0794b RCX: 0000000000000003 RDX: 0000000000000000 RSI: ffff88808c616b2b RDI: ffff8880aea07938 RBP: dffffc0000000000 R08: 0000000000000001 R09: 0000000000000001 R10: ffff8881fbf2ecf0 R11: ffff8881fbf2e440 R12: ffff8880aea07990 R13: 000000000000000b R14: ffff8880aea07938 R15: ffff88808c616b00 find_stack lib/stackdepot.c:180 [inline] depot_save_stack+0x10d/0x401 lib/stackdepot.c:229 save_stack+0x89/0xa0 mm/kasan/kasan.c:453 set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc mm/kasan/kasan.c:551 [inline] kasan_kmalloc+0xbf/0xe0 mm/kasan/kasan.c:529 __do_kmalloc_node mm/slab.c:3682 [inline] __kmalloc_node_track_caller+0x4c/0x70 mm/slab.c:3696 __kmalloc_reserve.isra.0+0x35/0xd0 net/core/skbuff.c:137 __alloc_skb+0xca/0x4c0 net/core/skbuff.c:205 alloc_skb include/linux/skbuff.h:980 [inline] ndisc_alloc_skb+0x134/0x320 net/ipv6/ndisc.c:402 ndisc_send_rs+0x2ea/0x630 net/ipv6/ndisc.c:661 addrconf_rs_timer+0x289/0x5a0 net/ipv6/addrconf.c:3765 call_timer_fn+0x14a/0x650 kernel/time/timer.c:1279 expire_timers kernel/time/timer.c:1318 [inline] __run_timers kernel/time/timer.c:1636 [inline] __run_timers kernel/time/timer.c:1604 [inline] run_timer_softirq+0x52a/0x1390 kernel/time/timer.c:1649 __do_softirq+0x254/0x9bf kernel/softirq.c:288 invoke_softirq kernel/softirq.c:368 [inline] irq_exit+0x15b/0x1a0 kernel/softirq.c:409 exiting_irq arch/x86/include/asm/apic.h:648 [inline] smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1102 apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline] RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x91/0xe0 kernel/locking/spinlock.c:192 RSP: 0018:ffff8881fdf4fa70 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 RAX: 1ffffffff0fa2cd1 RBX: 0000000000000286 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: 0000000000000001 RDI: 0000000000000286 RBP: ffff8880a4ce4bc8 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a4ce4400 R13: ffff8880a4ce4bc8 R14: 0000000000000001 R15: ffff8880aea2b558 try_to_wake_up+0x9a/0xef0 kernel/sched/core.c:2091 wake_up_process kernel/sched/core.c:2160 [inline] wake_up_q+0x90/0xe0 kernel/sched/core.c:468 futex_wake+0x337/0x3d0 kernel/futex.c:1714 do_futex+0x264/0x1850 kernel/futex.c:3924 SYSC_futex kernel/futex.c:3980 [inline] SyS_futex+0x1e8/0x2c0 kernel/futex.c:3948 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x7fe47ef7c469 RSP: 002b:00007fe47f609e38 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 00000000006ac0e8 RCX: 00007fe47ef7c469 RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00000000006ac0ec RBP: 00000000006ac0e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006ac0ec R13: 00007ffef89b434f R14: 00007fe47f5ea000 R15: 0000000000000003 rcu_bh kthread starved for 10472 jiffies! g18446744073709551399 c18446744073709551398 f0x2 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=0 rcu_bh R running task 30240 10 2 0x80000000 Call Trace: schedule+0x8d/0x1b0 kernel/sched/core.c:3428 schedule_timeout+0x43c/0xe40 kernel/time/timer.c:1746 rcu_gp_kthread+0xb8e/0x1ce0 kernel/rcu/tree.c:2255 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 INFO: rcu_preempt detected stalls on CPUs/tasks: Tasks blocked on level-0 rcu_node (CPUs 0-1): P11959 (detected by 0, t=10541 jiffies, g=35759, c=35758, q=736) kworker/u4:13 R running task 26816 11959 2 0x80000000 Workqueue: bat_events batadv_nc_worker Call Trace: preempt_schedule_irq+0xb0/0x140 kernel/sched/core.c:3611 retint_kernel+0x1b/0x2d RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline] RIP: 0010:lock_acquire+0x1ec/0x3f0 kernel/locking/lockdep.c:4001 RSP: 0018:ffff88808eb0fc48 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 RAX: 1ffffffff0fa2cd1 RBX: ffff8880659861c0 RCX: 00000000a37ffd5b RDX: dffffc0000000000 RSI: ffff888065986a98 RDI: 0000000000000286 RBP: ffffffff87d84360 R08: 0000000000000000 R09: 0000000000020012 R10: ffff888065986a98 R11: ffff8880659861c0 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000002 rcu_lock_acquire include/linux/rcupdate.h:242 [inline] rcu_read_lock include/linux/rcupdate.h:629 [inline] batadv_nc_process_nc_paths.part.0+0xe3/0x350 net/batman-adv/network-coding.c:695 batadv_nc_process_nc_paths net/batman-adv/network-coding.c:687 [inline] batadv_nc_worker+0x4b3/0x6d0 net/batman-adv/network-coding.c:735 process_one_work+0x813/0x1540 kernel/workqueue.c:2116 worker_thread+0x5d1/0x1070 kernel/workqueue.c:2250 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 kworker/u4:13 R running task 26816 11959 2 0x80000000 Workqueue: bat_events batadv_nc_worker Call Trace: preempt_schedule_irq+0xb0/0x140 kernel/sched/core.c:3611 retint_kernel+0x1b/0x2d RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline] RIP: 0010:lock_acquire+0x1ec/0x3f0 kernel/locking/lockdep.c:4001 RSP: 0018:ffff88808eb0fc48 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 RAX: 1ffffffff0fa2cd1 RBX: ffff8880659861c0 RCX: 00000000a37ffd5b RDX: dffffc0000000000 RSI: ffff888065986a98 RDI: 0000000000000286 RBP: ffffffff87d84360 R08: 0000000000000000 R09: 0000000000020012 R10: ffff888065986a98 R11: ffff8880659861c0 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000002 rcu_lock_acquire include/linux/rcupdate.h:242 [inline] rcu_read_lock include/linux/rcupdate.h:629 [inline] batadv_nc_process_nc_paths.part.0+0xe3/0x350 net/batman-adv/network-coding.c:695 batadv_nc_process_nc_paths net/batman-adv/network-coding.c:687 [inline] batadv_nc_worker+0x4b3/0x6d0 net/batman-adv/network-coding.c:735 process_one_work+0x813/0x1540 kernel/workqueue.c:2116 worker_thread+0x5d1/0x1070 kernel/workqueue.c:2250 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 rcu_preempt kthread starved for 10539 jiffies! g35759 c35758 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=1 rcu_preempt R running task 29488 8 2 0x80000000 Call Trace: schedule+0x8d/0x1b0 kernel/sched/core.c:3428 schedule_timeout+0x43c/0xe40 kernel/time/timer.c:1746 rcu_gp_kthread+0xb8e/0x1ce0 kernel/rcu/tree.c:2255 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404