Dynamically Disable ASLR in Linux Binaries.c

// gcc lab2.c -o BufferOverflow -fno-stack-protector -z execstack -no-pie
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/personality.h>
#include <sys/mman.h>

__attribute__((constructor)) void init() {
        setvbuf(stdout, NULL, _IONBF, 0);
        char *argv[] = {"/home/lab2/BufferOverflow", NULL};

        const int old_personality = personality(ADDR_NO_RANDOMIZE);
        if (!(old_personality & ADDR_NO_RANDOMIZE)) {
                const int new_personality = personality(ADDR_NO_RANDOMIZE);
                if (new_personality & ADDR_NO_RANDOMIZE) {
                        execv(argv[0], argv);
                }
        }
}

int main(int argc, char** argv) {
        char buffer[24];
        printf("Enter your name: ");
        gets(buffer);
        printf("Hello %s", buffer);
        return 0;
}