KVM/x86: assign hva with the right value to vm_munmap the pages

Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Wanpeng Li <wanpengli@tencent.com>
Cc: kvm@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Zheng Zhan Liang <zhengzhanliang@huorong.cn>
Message-Id: <20210201055310.267029-1-zhengzhanliang@huorong.cn>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

arch/x86/kvm/x86.c

@@ -10502,7 +10502,7 @@ void __user * __x86_set_memory_region(struct kvm *kvm, int id, gpa_t gpa,
 			return 0;
 
 		old_npages = slot->npages;
-		hva = 0;
+		hva = slot->userspace_addr;
 	}
 
 	for (i = 0; i < KVM_ADDRESS_SPACE_NUM; i++) {