stack overflow in linux

Question

how to create the condition of stack overflow in linux

Answer 1

There are code samples in the Wikipedia article. Why you'd want to cause one is beyond me...

Answer 2

a recursive function with no way out should do the trick

pseudo-code, my c is a bit rusty

void stack_overflow()
{
   stack_overflow();
}

Answer 3

You just need to think about what uses the stack in C.

• Dynamic memory allocation (with malloc()) uses the heap;
• Local variables and function call stacks use the stack.

So, all you have to do is exhaust the stack. Either endless recursion on a function or large local variable creation (don't let them be cleaned up though by going out of scope) should do it.

Answer 4

With alloca() or strdupa()

Answer 5

I'd recommend reading the phrack magazine article "Smashing the stack for fun and profit". It also contains sample code.

Answer 6

The simplest way is just declare a large enough automatic stack variable. No recursion or alloca needed. Interestingly, this is not a compile-time error. The size needed will vary by platform:

#define SIZE 10000000

int main(int argc, char **argv)
{
    char a[SIZE];
}

Answer 7

"how to create the condition of stack overflow in linux"

The same way you'd create a stack overflow on Windows.

Jason's answer might work, but some compilers by optimize it into a loop. I think adding a a parameter will do the trick:

    int Add(int num)
    {
        num += Add(num);
        return num;
    }