------------[ cut here ]------------
WARNING: CPU: 2 PID: 16660 at arch/x86/kvm/../../../virt/kvm/pfncache.c:267 __kvm_gpc_refresh+0x1933/0x2820 virt/kvm/pfncache.c:267
Modules linked in:
CPU: 2 UID: 0 PID: 16660 Comm: syz.0.3049 Not tainted 6.15.0-rc5-syzkaller-00123-g2c89c1b655c0 #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:__kvm_gpc_refresh+0x1933/0x2820 virt/kvm/pfncache.c:267
Code: c1 ea 03 80 3c 02 00 0f 85 15 0e 00 00 48 89 9d 08 01 00 00 48 8b 3c 24 31 db e8 98 d6 36 0a e9 5d f5 ff ff e8 ae 95 82 00 90 <0f> 0b 90 e9 4a f5 ff ff e8 a0 95 82 00 e8 3b 29 34 0a 31 ff 89 c3
RSP: 0018:ffffc9000457f280 EFLAGS: 00010287
RAX: 0000000000000724 RBX: ffffffffffffffff RCX: ffffc90027783000
RDX: 0000000000080000 RSI: ffffffff81389d42 RDI: 0000000000000000
RBP: ffffc90003b223c0 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000001 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff888000000000 R14: ffff888000000001 R15: ffff887fffffff01
FS:  00007f09573f66c0(0000) GS:ffff8880d6be1000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c3d4c72 CR3: 0000000050c4b000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 000000000000000b DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 kvm_gpc_refresh+0xc3/0x140 virt/kvm/pfncache.c:382
 kvm_xen_set_evtchn.part.0+0x19c/0x270 arch/x86/kvm/xen.c:1942
 kvm_xen_set_evtchn arch/x86/kvm/xen.c:2032 [inline]
 kvm_xen_hvm_evtchn_send+0x22f/0x290 arch/x86/kvm/xen.c:2022
 kvm_arch_vm_ioctl+0x112e/0x1cf0 arch/x86/kvm/x86.c:7268
 kvm_vm_ioctl+0x1985/0x3d40 virt/kvm/kvm_main.c:5292
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:906 [inline]
 __se_sys_ioctl fs/ioctl.c:892 [inline]
 __x64_sys_ioctl+0x190/0x200 fs/ioctl.c:892
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f095958e969
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f09573f6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f09597b5fa0 RCX: 00007f095958e969
RDX: 0000200000000180 RSI: 00000000400caed0 RDI: 0000000000000002
RBP: 00007f0959610ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f09597b5fa0 R15: 00007ffc6aaee438
 </TASK>