KVM: Use kmemdup() instead of kmalloc/memcpy

Switch to kmemdup() in two places to shorten the code and avoid possible bugs.

Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index d55a94f1155..03042d60a8f 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -3031,10 +3031,10 @@ int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
                 memset(dirty_bitmap_head, 0, n);
 
                 r = -ENOMEM;
-                slots = kzalloc(sizeof(struct kvm_memslots), GFP_KERNEL);
+                slots = kmemdup(kvm->memslots, sizeof(*kvm->memslots), GFP_KERNEL);
                 if (!slots)
                         goto out;
-                memcpy(slots, kvm->memslots, sizeof(struct kvm_memslots));
+
                 memslot = id_to_memslot(slots, log->slot);
                 memslot->nr_dirty_pages = 0;
                 memslot->dirty_bitmap = dirty_bitmap_head;