#include <stdio.h> #include <stdlib.h> int main() { __attribute__((unused)) char *p = malloc (1); char *b1 = malloc (128); char *b2 = malloc (128); fprintf (stderr, "b1 %p b2 %p\n", b1, b2); // Try to land in b2 from b1, causing no error // with the default redzone-size, but having // an error with a bigger redzone-size. // We need to choose a value which lands in b2 // on 32 bits and 64 bits. b1[127 + 70] = 'a'; return 0; }