[sean-jc:x86/uaccess_bad_mm 1/9] arch/loongarch/kvm/../../../virt/kvm/kvm_main.c:3207:35: sparse: sparse: incorrect type in argument 2 (different address spaces)

[sean-jc:x86/uaccess_bad_mm 1/9] arch/loongarch/kvm/../../../virt/kvm/kvm_main.c:3207:35: sparse: sparse: incorrect type in argument 2 (different address spaces)

[kernel test robot]

tree:   https://github.com/sean-jc/linux x86/uaccess_bad_mm
head:   5e20baf271c570712cb8efe0d9400725d6c04386
commit: 44888a116c641f3d2a458a9f6b5f6e41c2611125 [1/9] KVM: Reject user accesses to guest memory if current->mm != kvm->mm
config: loongarch-randconfig-r133-20260913 (https://download.01.org/0day-ci/archive/20260914/202609140425.EfV7ukei-lkp@intel.com/config)
compiler: clang version 24.0.0git (https://github.com/llvm/llvm-project 96295a1412f9afbee9d4a3c2701e83f5a529a9cc)
rustc: rustc 1.96.0 (ac68faa20 2026-05-25)
sparse: v0.6.5-rc1
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260914/202609140425.EfV7ukei-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202609140425.EfV7ukei-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> arch/loongarch/kvm/../../../virt/kvm/kvm_main.c:3207:35: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void [noderef] __user *to @@     got void *data @@
   arch/loongarch/kvm/../../../virt/kvm/kvm_main.c:3207:35: sparse:     expected void [noderef] __user *to
   arch/loongarch/kvm/../../../virt/kvm/kvm_main.c:3207:35: sparse:     got void *data
>> arch/loongarch/kvm/../../../virt/kvm/kvm_main.c:3207:61: sparse: sparse: incorrect type in argument 3 (different address spaces) @@     expected void const *from @@     got void [noderef] __user * @@
   arch/loongarch/kvm/../../../virt/kvm/kvm_main.c:3207:61: sparse:     expected void const *from
   arch/loongarch/kvm/../../../virt/kvm/kvm_main.c:3207:61: sparse:     got void [noderef] __user *

vim +3207 arch/loongarch/kvm/../../../virt/kvm/kvm_main.c

  3193	
  3194	/* Copy @len bytes from guest memory at '(@gfn * PAGE_SIZE) + @offset' to @data */
  3195	static int __kvm_read_guest_page(struct kvm *kvm, struct kvm_memory_slot *slot,
  3196					 gfn_t gfn, void *data, int offset, int len)
  3197	{
  3198		int r;
  3199		unsigned long addr;
  3200	
  3201		if (WARN_ON_ONCE(offset + len > PAGE_SIZE))
  3202			return -EFAULT;
  3203	
  3204		addr = gfn_to_hva_memslot_prot(slot, gfn, NULL);
  3205		if (kvm_is_error_hva(addr))
  3206			return -EFAULT;
> 3207		r = kvm_copy_to_user(kvm, data, (void __user *)addr + offset, len);
  3208		if (r)
  3209			return -EFAULT;
  3210		return 0;
  3211	}
  3212	

--
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