=============================
WARNING: suspicious RCU usage
5.15.176-syzkaller #0 Not tainted
-----------------------------
include/linux/kvm_host.h:880 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.4.1812/10202.

stack backtrace:
CPU: 0 PID: 10202 Comm: syz.4.1812 Not tainted 5.15.176-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
 __kvm_memslots include/linux/kvm_host.h:878 [inline]
 kvm_vcpu_memslots+0x1b7/0x200 include/linux/kvm_host.h:892
 kvm_vcpu_gfn_to_memslot+0x2b/0x390 virt/kvm/kvm_main.c:2158
 kvm_vcpu_write_guest_page virt/kvm/kvm_main.c:2982 [inline]
 kvm_vcpu_write_guest+0x78/0x130 virt/kvm/kvm_main.c:3018
 kvm_xen_write_hypercall_page+0x1ee/0x4e0 arch/x86/kvm/xen.c:664
 kvm_set_msr_common+0x128/0x29b0 arch/x86/kvm/x86.c:3390
 vmx_set_msr+0x11ba/0x2390 arch/x86/kvm/vmx/vmx.c:2322
 __kvm_set_msr arch/x86/kvm/x86.c:1782 [inline]
 kvm_vcpu_reset+0x994/0xf70 arch/x86/kvm/x86.c:11268
 kvm_arch_vcpu_create+0x744/0x9b0 arch/x86/kvm/x86.c:11123
 kvm_vm_ioctl_create_vcpu+0x2eb/0x810 virt/kvm/kvm_main.c:3725
 kvm_vm_ioctl+0x60b/0xb60 virt/kvm/kvm_main.c:4474
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:860
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f98417d3d29
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:00007f983f623038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f98419c4080 RCX: 00007f98417d3d29
RDX: 0000000000000000 RSI: 000000000000ae41 RDI: 0000000000000004
RBP: 00007f984184fb08 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f98419c4080 R15: 00007ffd4e1405d8
 </TASK>