Stack overruns happen when the current executing process requires more stack space than is available. On RHEL releases prior to RHEL7.1 the stack space is limited to 8KB (two pages) minus some space used by a thread_info structure at the base of the stack space. On RHEL7.1 and above the stack space has been increased to 16KB. As the stack grows it moves down towards the thread_info structur...