------------[ cut here ]------------
WARNING: CPU: 3 PID: 6239 at arch/x86/kvm/mmu/mmu.c:3579 mmu_free_root_page+0x36c/0x3f0 arch/x86/kvm/mmu/mmu.c:3579
Modules linked in:
CPU: 3 PID: 6239 Comm: syz-executor.3 Not tainted 6.9.0-rc3-syzkaller-00349-gfa4022cb7361 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:mmu_free_root_page+0x36c/0x3f0 arch/x86/kvm/mmu/mmu.c:3579
Code: 00 49 8d 7d 18 be 01 00 00 00 e8 4f 21 b4 09 31 ff 41 89 c6 89 c6 e8 d3 c5 70 00 45 85 f6 0f 85 5d fe ff ff e8 e5 ca 70 00 90 <0f> 0b 90 e9 4f fe ff ff e8 d7 ca 70 00 90 0f 0b 90 e9 79 fe ff ff
RSP: 0018:ffffc90029977620 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff88805df2e6c8 RCX: ffffffff811d8b0d
RDX: ffff888063280000 RSI: ffffffff811d8b1b RDI: 0000000000000005
RBP: ffff88805f955470 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 1ffff9200532eec5
R13: ffffc90029a6b000 R14: 0000000000000000 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff88802c500000(0063) knlGS:00000000f5e37b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f5e15d80 CR3: 000000005f558000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 kvm_mmu_free_roots+0x621/0x710 arch/x86/kvm/mmu/mmu.c:3631
 kvm_mmu_unload+0x42/0x150 arch/x86/kvm/mmu/mmu.c:5638
 kvm_mmu_reset_context arch/x86/kvm/mmu/mmu.c:5596 [inline]
 kvm_mmu_after_set_cpuid+0x14d/0x300 arch/x86/kvm/mmu/mmu.c:5585
 kvm_vcpu_after_set_cpuid arch/x86/kvm/cpuid.c:396 [inline]
 kvm_set_cpuid+0x2091/0x3620 arch/x86/kvm/cpuid.c:470
 kvm_vcpu_ioctl_set_cpuid2+0xe7/0x160 arch/x86/kvm/cpuid.c:537
 kvm_arch_vcpu_ioctl+0x26b1/0x4300 arch/x86/kvm/x86.c:5946
 kvm_vcpu_ioctl+0xa2c/0x1090 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4620
 kvm_vcpu_compat_ioctl+0x216/0x3f0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4664
 __do_compat_sys_ioctl+0x2c3/0x330 fs/ioctl.c:1004
 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
 __do_fast_syscall_32+0x75/0x120 arch/x86/entry/common.c:321
 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:346
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf7287579
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 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000f5e375ac EFLAGS: 00000292 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 000000000000000b RCX: 000000004008ae90
RDX: 00000000200001c0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 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:	8d b4 26 00 00 00 00 	lea    0x0(%rsi,%riz,1),%esi
  37:	8d b4 26 00 00 00 00 	lea    0x0(%rsi,%riz,1),%esi