rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (10499 ticks this GP) idle=216/1/0x4000000000000002 softirq=12955/12955 fqs=40 
	(t=10501 jiffies g=6845 q=203)
rcu: rcu_preempt kthread starved for 10422 jiffies! g6845 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1
rcu: RCU grace-period kthread stack dump:
rcu_preempt     I29032    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
NMI backtrace for cpu 0
CPU: 0 PID: 8577 Comm: syz-executor.0 Not tainted 5.5.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fb/0x318 lib/dump_stack.c:118
 nmi_cpu_backtrace+0xaf/0x1a0 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x174/0x290 lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x10/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x15a/0x220 kernel/rcu/tree_stall.h:254
 print_cpu_stall kernel/rcu/tree_stall.h:455 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:529 [inline]
 rcu_pending kernel/rcu/tree.c:2827 [inline]
 rcu_sched_clock_irq+0xe25/0x1ad0 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:__sanitizer_cov_trace_pc+0x0/0x50 kernel/kcov.c:183
Code: 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 53 48 89 fb e8 13 00 00 00 48 8b 3d f4 f4 ed 07 48 89 de e8 84 f4 3b 00 5b 5d c3 cc <48> 8b 04 24 65 48 8b 0c 25 c0 1d 02 00 65 8b 15 38 5f 8b 7e f7 c2
RSP: 0018:ffffc900021f7940 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 1ffff11013bbb661 RBX: ffffea0002a08000 RCX: 0000000000000000
RDX: ffffc90001f39000 RSI: 00000000fffffffc RDI: ffffea0002a08000
RBP: ffffc900021f7968 R08: 000000000003a728 R09: fffffbfff124248a
R10: fffffbfff124248a R11: 0000000000000000 R12: ffff88809fe1eea0
R13: dffffc0000000000 R14: 00000000fffffffc R15: ffff8880a3499678
 free_thread_stack+0x168/0x590 kernel/fork.c:280
 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_irq+0xc1/0x140 kernel/sched/core.c:4338
 retint_kernel+0x1b/0x2b
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:752 [inline]
RIP: 0010:vprintk_emit+0x1fa/0x3a0 kernel/printk/printk.c:1980
Code: 80 3c 08 00 74 0c 48 c7 c7 68 95 2a 89 e8 de 4a 53 00 48 83 3d 6e b9 ca 07 00 0f 84 9d 01 00 00 e8 7b e2 16 00 4c 89 f7 57 9d <0f> 1f 44 00 00 41 83 fc fe 41 89 de 74 36 4d 39 ef 74 31 bf 01 00
RSP: 0018:ffffc900021f7bc0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff02
RAX: ffffffff815fdc05 RBX: 000000000000009c RCX: 0000000000040000
RDX: ffffc90001f39000 RSI: 00000000000035ea RDI: 0000000000000286
RBP: ffffc900021f7c08 R08: ffff888097e54918 R09: fffffbfff125a63f
R10: fffffbfff125a63f R11: 0000000000000000 R12: 00000000ffffffff
R13: 0000000000006ebf R14: 0000000000000286 R15: 0000000000006ebe
 vprintk_default+0x28/0x30 kernel/printk/printk.c:2023
 vprintk_func+0x158/0x170 kernel/printk/printk_safe.c:386
 printk+0x62/0x8d kernel/printk/printk.c:2056
 vmx_vm_init+0x19e/0x230 arch/x86/kvm/vmx/vmx.c:6857
 kvm_arch_init_vm+0x488/0x4d0 arch/x86/kvm/x86.c:9533
 kvm_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:722 [inline]
 kvm_dev_ioctl_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:3519 [inline]
 kvm_dev_ioctl+0x9e3/0x2110 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:00007fedeb520c78 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: 00007fedeb5216d4
R13: 00000000004c44de R14: 00000000004dadb0 R15: 00000000ffffffff