netlink: 12 bytes leftover after parsing attributes in process `syz.2.909'.
netlink: 'syz.2.909': attribute type 18 has an invalid length.
=============================
WARNING: suspicious RCU usage
6.14.0-rc3-syzkaller-00096-ge9a8cac0bf89 #0 Not tainted
-----------------------------
./include/linux/kvm_host.h:1057 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.2.909/9097.

stack backtrace:
CPU: 1 UID: 0 PID: 9097 Comm: syz.2.909 Not tainted 6.14.0-rc3-syzkaller-00096-ge9a8cac0bf89 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:120
 lockdep_rcu_suspicious+0x210/0x3c0 kernel/locking/lockdep.c:6847
 __kvm_memslots include/linux/kvm_host.h:1057 [inline]
 __kvm_memslots include/linux/kvm_host.h:1054 [inline]
 kvm_vcpu_memslots include/linux/kvm_host.h:1071 [inline]
 kvm_vcpu_gfn_to_memslot+0x48c/0x590 virt/kvm/kvm_main.c:2556
 kvm_vcpu_write_guest_page virt/kvm/kvm_main.c:3240 [inline]
 kvm_vcpu_write_guest+0x68/0x130 virt/kvm/kvm_main.c:3276
 kvm_xen_write_hypercall_page+0x4aa/0x530 arch/x86/kvm/xen.c:1273
 kvm_set_msr_common+0x160b/0x33c0 arch/x86/kvm/x86.c:3737
 vmx_set_msr+0xc2b/0x3950 arch/x86/kvm/vmx/vmx.c:2494
 __kvm_set_msr arch/x86/kvm/x86.c:1863 [inline]
 kvm_vcpu_reset+0x9ca/0x1a10 arch/x86/kvm/x86.c:12469
 kvm_arch_vcpu_create+0x6dc/0xab0 arch/x86/kvm/x86.c:12318
 kvm_vm_ioctl_create_vcpu virt/kvm/kvm_main.c:4108 [inline]
 kvm_vm_ioctl+0xf4f/0x3d70 virt/kvm/kvm_main.c:5057
 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/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd217f8d0a9
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:00007fd218d62038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fd2181a5fa0 RCX: 00007fd217f8d0a9
RDX: 0000000000000001 RSI: 000000000000ae41 RDI: 0000000000000004
RBP: 00007fd21800e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fd2181a5fa0 R15: 00007ffdd349eaa8
 </TASK>