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authorDan Carpenter <dan.carpenter@linaro.org>2024-06-12 14:50:39 +0300
committerPaolo Bonzini <pbonzini@redhat.com>2024-08-13 06:08:40 -0400
commitcd2d00606553e631e9b5d11cca7da38fc95433e6 (patch)
tree06975ba1614050cbf21f0b168f1b934405de47b6 /arch
parent696eb24ac2af632ddcb422114b2d8498af1de20c (diff)
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: dee5a47cc7a4 ("KVM: SEV: Add KVM_SEV_SNP_LAUNCH_UPDATE command") Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org> Message-ID: <20240612115040.2423290-4-dan.carpenter@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kvm/svm/sev.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c
index 393f450adbc3..714c517dd4b7 100644
--- a/arch/x86/kvm/svm/sev.c
+++ b/arch/x86/kvm/svm/sev.c
@@ -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);
}