Commit cd2d0060 authored by Dan Carpenter's avatar Dan Carpenter Committed by Paolo Bonzini
Browse files

KVM: SVM: Fix an error code in sev_gmem_post_populate() 



The copy_from_user() function returns the number of bytes which it
was not able to copy.  Return -EFAULT instead.

Fixes: dee5a47c ("KVM: SEV: Add KVM_SEV_SNP_LAUNCH_UPDATE command")
Signed-off-by: default avatarDan Carpenter <dan.carpenter@linaro.org>
Message-ID: <20240612115040.2423290-4-dan.carpenter@linaro.org>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 696eb24a

arch/x86/kvm/svm/sev.c

+3 −2
Original line number Diff line number Diff line
@@ -2290,9 +2290,10 @@ static int sev_gmem_post_populate(struct kvm *kvm, gfn_t gfn_start, kvm_pfn_t pf 
		if (src) {

			void *vaddr = kmap_local_pfn(pfn + i);



			ret = copy_from_user(vaddr, src + i * PAGE_SIZE, PAGE_SIZE);

			if (ret)

			if (copy_from_user(vaddr, src + i * PAGE_SIZE, PAGE_SIZE)) {

				ret = -EFAULT;

				goto err;

			}

			kunmap_local(vaddr);

		}