------------[ cut here ]------------
WARNING: CPU: 1 PID: 9821 at arch/x86/kvm/../../../virt/kvm/pfncache.c:247 __kvm_gpc_refresh+0xf76/0x10f0 arch/x86/kvm/../../../virt/kvm/pfncache.c:247
Modules linked in:
CPU: 1 PID: 9821 Comm: syz-executor.4 Not tainted 6.9.0-rc4-syzkaller-00173-g3cdb45594619 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:__kvm_gpc_refresh+0xf76/0x10f0 arch/x86/kvm/../../../virt/kvm/pfncache.c:247
Code: c6 05 53 03 86 0e 01 48 c7 c7 a0 e3 c1 8b be 07 04 00 00 48 c7 c2 e0 e3 c1 8b e8 75 8c 65 00 e9 e7 f3 ff ff e8 9b b1 88 00 90 <0f> 0b 90 bb ea ff ff ff e9 d1 fe ff ff e8 88 b1 88 00 90 0f 0b 90
RSP: 0018:ffffc900031cf1b0 EFLAGS: 00010283
RAX: ffffffff810d4fc5 RBX: 0000000000000001 RCX: 0000000000040000
RDX: ffffc90015cab000 RSI: 0000000000003150 RDI: 0000000000003151
RBP: 0000000000000040 R08: ffffffff810d409a R09: 1ffffffff25e64c3
R10: dffffc0000000000 R11: fffffbfff25e64c4 R12: ffffffffffffffff
R13: ffff88806d04e1a8 R14: ffffffffffffffee R15: ffff887fffffffff
FS:  0000000000000000(0000) GS:ffff8880b9500000(0063) knlGS:00000000f5f1db40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f7363e40 CR3: 000000006cd6a000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __kvm_gpc_activate+0xa5/0x380 arch/x86/kvm/../../../virt/kvm/pfncache.c:403
 kvm_xen_vcpu_set_attr+0x1c1/0x11c0 arch/x86/kvm/xen.c:890
 kvm_arch_vcpu_ioctl+0x1704/0x29a0 arch/x86/kvm/x86.c:6265
 kvm_vcpu_ioctl+0x6e0/0xd00 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4620
 kvm_vcpu_compat_ioctl+0x242/0x450 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4664
 __do_compat_sys_ioctl fs/ioctl.c:1004 [inline]
 __se_compat_sys_ioctl+0x51c/0xca0 fs/ioctl.c:947
 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
 __do_fast_syscall_32+0xb8/0x120 arch/x86/entry/common.c:321
 do_fast_syscall_32+0x34/0x80 arch/x86/entry/common.c:346
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf732b579
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 002b:00000000f5f1d5ac EFLAGS: 00000206 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 000000004048aecb
RDX: 0000000020000180 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
----------------
Code disassembly (best guess), 2 bytes skipped:
   0:	10 06                	adc    %al,(%rsi)
   2:	03 74 b4 01          	add    0x1(%rsp,%rsi,4),%esi
   6:	10 07                	adc    %al,(%rdi)
   8:	03 74 b0 01          	add    0x1(%rax,%rsi,4),%esi
   c:	10 08                	adc    %cl,(%rax)
   e:	03 74 d8 01          	add    0x1(%rax,%rbx,8),%esi
  1e:	00 51 52             	add    %dl,0x52(%rcx)
  21:	55                   	push   %rbp
  22:	89 e5                	mov    %esp,%ebp
  24:	0f 34                	sysenter
  26:	cd 80                	int    $0x80
* 28:	5d                   	pop    %rbp <-- trapping instruction
  29:	5a                   	pop    %rdx
  2a:	59                   	pop    %rcx
  2b:	c3                   	ret
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	90                   	nop
  2f:	90                   	nop
  30:	90                   	nop
  31:	90                   	nop
  32:	90                   	nop
  33:	90                   	nop
  34:	90                   	nop
  35:	90                   	nop
  36:	90                   	nop
  37:	90                   	nop
  38:	90                   	nop
  39:	90                   	nop
  3a:	90                   	nop
  3b:	90                   	nop
  3c:	90                   	nop
  3d:	90                   	nop