On 2022/11/1 08:46, jarkko@xxxxxxxxxx wrote: > Why would we want to enforce for user space not to do this, even > if it does cause malfunctioning program? > We want to resolve the problem at the source rather than just deal with the symptom passively derived from it. For instance, we might be able to return VM_FAULT_SIGBUS to kill the malicious application, but if the malicious child touch the memory earlier than parent despite it cannot use the virtual EPC page, then the parent will be victim. Even thought it's not a security threaten, there is no practical significance for sharing a virtual EPC instance. So we would like to prevent it from the beginning. Best Regards, Zhiquan > BR, Jarkko
