TITLE: INFO: rcu detected stall in kvm_vcpu_ioctl

[ 1057.417927] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
[ 1057.424666] rcu: 	(detected by 1, t=10502 jiffies, g=7113, q=509)
[ 1057.431125] rcu: All QSes seen, last rcu_preempt kthread activity 10498 (4295042895-4295032397), jiffies_till_next_fqs=1, root ->qsmask 0x0
[ 1057.444299] syz-executor0   R  running task    22808  7363   5346 0x00000000
[ 1057.451771] Call Trace:
[ 1057.454712]  <IRQ>
[ 1057.457168]  sched_show_task.cold.83+0x2b6/0x30a
[ 1057.495301]  print_other_cpu_stall.cold.79+0xa83/0xba5
[ 1057.554036]  rcu_check_callbacks+0xafc/0x1990
[ 1057.687133]  update_process_times+0x2d/0x70
[ 1057.691573]  tick_sched_handle+0x9f/0x180
[ 1057.695766]  tick_sched_timer+0x45/0x130
[ 1057.699875]  __hrtimer_run_queues+0x41c/0x10d0
[ 1057.749858]  hrtimer_interrupt+0x313/0x780
[ 1057.754284]  smp_apic_timer_interrupt+0x1a1/0x760
[ 1057.821414]  apic_timer_interrupt+0xf/0x20
[ 1057.825660]  </IRQ>
[ 1057.827917] RIP: 0010:lock_acquire+0x268/0x520
[ 1057.851437] RSP: 0018:ffff8801c664eb20 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
[ 1057.859184] RAX: dffffc0000000000 RBX: 1ffff10038cc9d69 RCX: 0000000000000000
[ 1057.866490] RDX: 1ffffffff12a4535 RSI: 0000000000000000 RDI: 0000000000000282
[ 1057.873788] RBP: ffff8801c664ec10 R08: ffff8801c10e6e70 R09: 0000000000000002
[ 1057.881090] R10: ffff8801c10e6e50 R11: f333abdc872bc457 R12: ffff8801c10e6580
[ 1057.888382] R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000
[ 1057.916107]  _raw_spin_lock+0x2d/0x40
[ 1057.925256]  kvm_mmu_unprotect_page+0xf9/0x450
[ 1057.938957]  x86_emulate_instruction+0x635/0x1fc0
[ 1057.970189]  kvm_mmu_page_fault+0x396/0x1b30
[ 1058.076393]  handle_ept_violation+0x29e/0x6a0
[ 1058.092996]  vmx_handle_exit+0x2f7/0x17e0
[ 1058.133773]  vcpu_enter_guest+0x14a9/0x62e0
[ 1058.232876]  kvm_arch_vcpu_ioctl_run+0x375/0x16e0
[ 1058.242845]  kvm_vcpu_ioctl+0x72b/0x1150
[ 1058.347536]  do_vfs_ioctl+0x1de/0x1720
[ 1058.404376]  ksys_ioctl+0xa9/0xd0
[ 1058.407861]  __x64_sys_ioctl+0x73/0xb0
[ 1058.411768]  do_syscall_64+0x1b9/0x820
[ 1058.450911]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[ 1058.456119] RIP: 0033:0x457099
[ 1058.478267] RSP: 002b:00007fff8bfb2748 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[ 1058.486005] RAX: ffffffffffffffda RBX: 000000000212b914 RCX: 0000000000457099
[ 1058.493299] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000006
[ 1058.500585] RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000
[ 1058.507875] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
[ 1058.515159] R13: 00000000004cf730 R14: 00000000004c59b9 R15: 0000000000000000