run this like a user, not root

#include <stdio.h>
#include <stdlib.h>

main()
{
        void *buf[2048];
        long int mem = 0x3000000;
        int i = 0;

        for(;;){
                printf("%lX\n", mem);
                buf[i] = malloc(mem);
                if (buf[i] == NULL)
                  mem /= 2;
                else{
                        memset(buf[i], i, mem);
                        i++;
                }
                if(mem < 1){
                        sleep(1);
                        mem = 0x20000;
                }
        }
        getchar();
}