From: Yan Zhao <yan.y.zhao@intel.com>

sev_gmem_post_populate() needs to unmap the target vaddr after
copy_from_user() to the vaddr fails.

Fixes: dee5a47cc7a4 ("KVM: SEV: Add KVM_SEV_SNP_LAUNCH_UPDATE command")
Signed-off-by: Yan Zhao <yan.y.zhao@intel.com>
Signed-off-by: Michael Roth <michael.roth@amd.com>
---
 arch/x86/kvm/svm/sev.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c
index f59c65abe3cf..261d9ef8631b 100644
--- a/arch/x86/kvm/svm/sev.c
+++ b/arch/x86/kvm/svm/sev.c
@@ -2296,6 +2296,7 @@ static int sev_gmem_post_populate(struct kvm *kvm, gfn_t gfn_start, kvm_pfn_t pf
 			void *vaddr = kmap_local_pfn(pfn + i);
 
 			if (copy_from_user(vaddr, src + i * PAGE_SIZE, PAGE_SIZE)) {
+				kunmap_local(vaddr);
 				ret = -EFAULT;
 				goto err;
 			}
-- 
2.25.1