rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-...!: (1 GPs behind) idle=faa/1/0x4000000000000004 softirq=398570/398572 fqs=0 
	(t=29989 jiffies g=544241 q=271)
NMI backtrace for cpu 1
CPU: 1 PID: 31069 Comm: syz-executor.0 Not tainted 5.3.0-rc3-next-20190808 #62
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+0x172/0x1f0 lib/dump_stack.c:113
 nmi_cpu_backtrace.cold+0x70/0xb2 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x23b/0x28b lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x183/0x1cf 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:2736 [inline]
 rcu_sched_clock_irq.cold+0x4dd/0xc13 kernel/rcu/tree.c:2183
 update_process_times+0x32/0x80 kernel/time/timer.c:1724
 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:167
 tick_sched_timer+0x53/0x140 kernel/time/tick-sched.c:1299
 __run_hrtimer kernel/time/hrtimer.c:1493 [inline]
 __hrtimer_run_queues+0x364/0xe40 kernel/time/hrtimer.c:1555
 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1617
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1068 [inline]
 smp_apic_timer_interrupt+0x160/0x610 arch/x86/kernel/apic/apic.c:1093
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830
RIP: 0010:ffs arch/x86/include/asm/bitops.h:297 [inline]
RIP: 0010:__do_softirq+0x227/0x98c kernel/softirq.c:280
Code: c7 c0 f0 f3 f2 88 48 c1 e8 03 42 80 3c 30 00 0f 85 b1 06 00 00 48 83 3d d6 f1 72 01 00 0f 84 d6 05 00 00 fb 66 0f 1f 44 00 00 <b8> ff ff ff ff 48 c7 45 c8 00 91 e0 88 0f bc 45 d4 83 c0 01 89 45
RSP: 0018:ffff8880ae909f18 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff11e5e7e RBX: ffff8880947ea100 RCX: 1ffffffff138cb6e
RDX: 0000000000000000 RSI: ffffffff81779e2e RDI: ffffffff878001fc
RBP: ffff8880ae909f98 R08: ffff8880947ea100 R09: 0000000000000000
R10: ffffffff8a04f050 R11: 0000000000000001 R12: ffff888056fe7968
R13: 0000000000000028 R14: dffffc0000000000 R15: 0000000000000000
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x19b/0x1e0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:536 [inline]
 do_IRQ+0x12c/0x200 arch/x86/kernel/irq.c:259
 common_interrupt+0xf/0xf arch/x86/entry/entry_64.S:607
 </IRQ>
RIP: 0010:vcpu_enter_guest+0x24dc/0x5e90 arch/x86/kvm/x86.c:7984
Code: ff df 48 c1 e8 03 80 3c 10 00 0f 85 97 31 00 00 48 83 3d 46 f4 e5 07 00 0f 84 5a 1b 00 00 e8 9b 1b 65 00 fb 66 0f 1f 44 00 00 <bf> 01 00 00 00 e8 aa 0c 41 00 31 ff 65 8b 1d 79 fe f4 7e 89 de e8
RSP: 0018:ffff888056fe7a10 EFLAGS: 00000246 ORIG_RAX: ffffffffffffffd7
RAX: 0000000000040000 RBX: ffffffff88bd2220 RCX: ffffc9000fd95000
RDX: 0000000000040000 RSI: ffffffff810cffb5 RDI: ffffffff810cff83
RBP: ffff888056fe7b20 R08: ffff8880947ea100 R09: ffffed10128fd421
R10: ffffed10128fd420 R11: ffff8880947ea107 R12: ffff88805efe96ac
R13: ffff88805efe9680 R14: 0000000000000001 R15: ffff88805efe96b0
 vcpu_run arch/x86/kvm/x86.c:8151 [inline]
 kvm_arch_vcpu_ioctl_run+0x464/0x1750 arch/x86/kvm/x86.c:8359
 kvm_vcpu_ioctl+0x4dc/0xfd0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2754
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:509 [inline]
 do_vfs_ioctl+0xdb6/0x13e0 fs/ioctl.c:696
 ksys_ioctl+0xab/0xd0 fs/ioctl.c:713
 __do_sys_ioctl fs/ioctl.c:720 [inline]
 __se_sys_ioctl fs/ioctl.c:718 [inline]
 __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:718
 do_syscall_64+0xfa/0x760 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x459829
Code: fd b7 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 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f392f878c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459829
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000006
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f392f8796d4
R13: 00000000004c2bcf R14: 00000000004d6170 R15: 00000000ffffffff