------------[ cut here ]------------
kvm_is_error_gpa(gpa) == kvm_is_error_hva(uhva)
WARNING: arch/x86/kvm/../../../virt/kvm/pfncache.c:267 at __kvm_gpc_refresh+0x1992/0x22c0 virt/kvm/pfncache.c:267, CPU#2: kworker/2:1/39
Modules linked in:
CPU: 2 UID: 0 PID: 39 Comm: kworker/2:1 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
Workqueue: events irqfd_inject
RIP: 0010:__kvm_gpc_refresh+0x1992/0x22c0 virt/kvm/pfncache.c:267
Code: 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 26 08 00 00 48 8b 04 24 31 db 48 8b a8 08 01 00 00 e9 cf f0 ff ff e8 3f 9a 85 00 90 <0f> 0b 90 e9 92 f7 ff ff e8 31 9a 85 00 48 85 db 0f 84 e9 ed ff ff
RSP: 0018:ffffc90000737820 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffffffffffffffff RCX: ffffffff8182d8e9
RDX: ffff88801f2da500 RSI: ffffffff8182f1a1 RDI: ffff88801f2da500
RBP: ffffffffffffff01 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000001 R11: 0000000000000000 R12: ffff888000000000
R13: ffff888000000001 R14: ffff888000000000 R15: ffffc90000737a98
FS:  0000000000000000(0000) GS:ffff8880d6576000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c3e65d3 CR3: 000000005d79d000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 kvm_gpc_refresh+0xc9/0x170 virt/kvm/pfncache.c:382
 kvm_xen_set_evtchn.part.0+0x168/0x230 arch/x86/kvm/xen.c:1942
 kvm_xen_set_evtchn arch/x86/kvm/xen.c:1960 [inline]
 evtchn_set_fn+0x69/0x90 arch/x86/kvm/xen.c:1959
 kvm_set_irq+0x249/0x4e0 virt/kvm/irqchip.c:88
 irqfd_inject+0xd7/0x150 virt/kvm/eventfd.c:49
 process_one_work+0xa0e/0x1980 kernel/workqueue.c:3302
 process_scheduled_works kernel/workqueue.c:3385 [inline]
 worker_thread+0x5ef/0xe50 kernel/workqueue.c:3466
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>