=============================
WARNING: suspicious RCU usage
6.13.0-syzkaller-01141-g62de6e168526 #0 Not tainted
-----------------------------
./include/linux/kvm_host.h:1038 suspicious rcu_dereference_check() usage!

other info that might help us debug this:


rcu_scheduler_active = 2, debug_locks = 1
no locks held by syz.0.5266/28856.

stack backtrace:
CPU: 1 UID: 0 PID: 28856 Comm: syz.0.5266 Not tainted 6.13.0-syzkaller-01141-g62de6e168526 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 lockdep_rcu_suspicious+0x226/0x340 kernel/locking/lockdep.c:6847
 __kvm_memslots include/linux/kvm_host.h:1036 [inline]
 kvm_vcpu_memslots include/linux/kvm_host.h:1050 [inline]
 kvm_vcpu_gfn_to_memslot+0x429/0x4c0 virt/kvm/kvm_main.c:2554
 kvm_vcpu_write_guest_page virt/kvm/kvm_main.c:3238 [inline]
 kvm_vcpu_write_guest+0x7c/0x130 virt/kvm/kvm_main.c:3274
 kvm_xen_write_hypercall_page+0x2ff/0x5f0 arch/x86/kvm/xen.c:1299
 kvm_set_msr_common+0x150/0x3da0 arch/x86/kvm/x86.c:3751
 vmx_set_msr+0x15da/0x2790 arch/x86/kvm/vmx/vmx.c:2487
 __kvm_set_msr arch/x86/kvm/x86.c:1877 [inline]
 kvm_vcpu_reset+0xbea/0x1740 arch/x86/kvm/x86.c:12456
 kvm_arch_vcpu_create+0x8dc/0xa80 arch/x86/kvm/x86.c:12305
 kvm_vm_ioctl_create_vcpu+0x3d6/0xa00 virt/kvm/kvm_main.c:4106
 kvm_vm_ioctl+0x7e2/0xd30 virt/kvm/kvm_main.c:5019
 kvm_vm_compat_ioctl+0x26a/0x5a0 virt/kvm/kvm_main.c:5321
 __do_compat_sys_ioctl fs/ioctl.c:1004 [inline]
 __se_compat_sys_ioctl+0x502/0xc10 fs/ioctl.c:947
 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
 __do_fast_syscall_32+0xb4/0x110 arch/x86/entry/common.c:386
 do_fast_syscall_32+0x34/0x80 arch/x86/entry/common.c:411
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf710d579
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:00000000f50ff55c EFLAGS: 00000206 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 000000000000ae41
RDX: 0000000000000000 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