nixpkgs/pkgs/test/cc-wrapper/fortify1-example.c

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/* an example that should be protected by FORTIFY_SOURCE=1 */
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
int main(int argc, char *argv[]) {
/* allocate on the heap so we're likely to get an
* over-allocation and can be more sure that a
* failure is because of fortify protection rather
* than a genuine segfault */
char* buffer = malloc(sizeof(char) * 7);
strcpy(buffer, argv[1]);
puts(buffer);
return 0;
}