The copy_from_user() function returns the number of bytes which it
was not able to copy. Return -EFAULT instead.
Fixes: dee5a47cc7a4 ("KVM: SEV: Add KVM_SEV_SNP_LAUNCH_UPDATE command")
Signed-off-by: Dan Carpenter <[email protected]>
---
arch/x86/kvm/svm/sev.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c
index 70d8d213d401..14bb52ebd65a 100644
--- a/arch/x86/kvm/svm/sev.c
+++ b/arch/x86/kvm/svm/sev.c
@@ -2220,9 +2220,10 @@ 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);
}
--
2.43.0