TITLE: INFO: rcu detected stall in kvm_vm_ioctl
ALT: stall in kvm_vm_ioctl
TYPE: HANG

[  804.522871] INFO: rcu_sched self-detected stall on CPU
[  804.529252] 	1-....: (10499 ticks this GP) idle=fa6/140000000000001/0 softirq=95936/95936 fqs=5159 
[  804.539091] 	 (t=10500 jiffies g=20436 c=20435 q=6178)
[  804.545042] NMI backtrace for cpu 1
[  804.549096] CPU: 1 PID: 27600 Comm: syz-executor.2 Not tainted 4.15.0 #2
[  804.556384] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  804.566739] Call Trace:
[  804.569694]  <IRQ>
[  804.571886]  [<ffffffff84279082>] dump_stack+0x14d/0x20b
[  804.584399]  [<ffffffff84285627>] nmi_cpu_backtrace.cold+0x19/0x98
[  804.597748]  [<ffffffff842855fa>] nmi_trigger_cpumask_backtrace+0x16a/0x17e
[  804.605275]  [<ffffffff8134aa44>] arch_trigger_cpumask_backtrace+0x14/0x20
[  804.612389]  [<ffffffff815a091e>] rcu_dump_cpu_stacks+0x189/0x1d5
[  804.618969]  [<ffffffff815a1623>] rcu_check_callbacks.cold+0x51c/0xc29
[  804.641740]  [<ffffffff815bc2a2>] update_process_times+0x32/0x80
[  804.648033]  [<ffffffff815eede0>] tick_sched_handle+0xa0/0x180
[  804.654215]  [<ffffffff815ef3d4>] tick_sched_timer+0x44/0x130
[  804.660116]  [<ffffffff815bff37>] __hrtimer_run_queues+0x307/0xd90
[  804.680546]  [<ffffffff815c1a2a>] hrtimer_interrupt+0x2ea/0x730
[  804.686753]  [<ffffffff844050f4>] smp_apic_timer_interrupt+0x144/0x5e0
[  804.693685]  [<ffffffff84401cbe>] apic_timer_interrupt+0x8e/0xa0
[  804.700024]  </IRQ>
[  804.702566] RIP: 0010:lock_is_held_type+0xff/0x150
[  804.707490] RSP: 0018:ffff8801c13939f8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff12
[  804.715384] RAX: 0000000000000007 RBX: 0000000000000246 RCX: ffffc90002d1d000
[  804.722880] RDX: 0000000000000000 RSI: ffffc9001195b0a0 RDI: 0000000000000246
[  804.730637] RBP: ffff8801c1393a18 R08: ffff8801a6e88240 R09: 00000000001004d7
[  804.738556] R10: ffff8801a6e88bd8 R11: 0000000000000001 R12: 0000000000000000
[  804.746415] R13: ffff8801a6e88240 R14: dffffc0000000000 R15: ffffc9001195b000
[  804.770545]  [<ffffffff81091a19>] kvm_vm_ioctl+0x719/0x1bc0
[  804.831940]  [<ffffffff81092ffc>] kvm_vm_compat_ioctl+0x13c/0x23d
[  804.875188]  [<ffffffff81bc64dc>] compat_SyS_ioctl+0x13c/0x3410
[  804.887548]  [<ffffffff8101d707>] do_fast_syscall_32+0x357/0xcd1
[  804.900965]  [<ffffffff84401a9b>] entry_SYSENTER_compat+0x8b/0x9d
[  804.907706] RIP: 0023:0xf7f60c69
[  804.911212] RSP: 002b:00000000f5d5c0cc EFLAGS: 00000286 ORIG_RAX: 0000000000000036
[  804.919931] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 000000004010aef4
[  804.927876] RDX: 00000000200000c0 RSI: 0000000000000000 RDI: 0000000000000000
[  804.935455] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[  804.943529] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[  804.952247] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
