Our research started with a 96-megabyte surprise:

b97bb000-b97dc000 rw-p 00000000 00:00 0 [heap]
bf7c6000-bf806000 rw-p 00000000 00:00 0 [stack]

and a 12-year-old question: “If the heap grows up, and the stack grows down, what happens when they clash? Is it exploitable? How?”

https://www.qualys.com/2017/06/19/stack-clash/stack-clash.txt