Finding Crashes

Setup Details - Provided source code files are intended to be compiled under Linux (tested under Ubuntu 20.04 LTS). (Not sure if this requirement really matters; I am using VS Code on windows)

The goal is to do find 'bug' - find vulnerabilities that can lead to crashes, reason about the input that will trigger the vulnerabilities found and crash the program. Provide the input.

Also is it possible to hijack the control flow, make the program print out "Great job" to stdout, and exit with an exit code 0?

Following is the main.c code -

#include

#include

int win()

{

printf("Great Job ");

exit(0);

}

int main()

{

char buffer[40];

unsigned long long target;

scanf("%s", buffer);

printf("You sent: %s ", buffer);

exit(1);

}