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smash the stack

smash the stack: [C programming] n. To corrupt the execution stack
   by writing past the end of a local array or other data structure.
   Code that smashes the stack can cause a return from the routine to
   jump to a random address, resulting in some of the most insidious
   data-dependent bugs known to mankind.  Variants include `trash'
   the stack, scribble the stack, mangle the stack; the term
   **mung the stack is not used, as this is never done
   intentionally.  See spam; see also aliasing bug,
   fandango on core, memory leak, memory smash,
   precedence lossage, overrun screw.