malloc() and free()

#include <stdlib.h>

int * b;

int main(void)
{
    int * a = NULL;
    a = (int *) malloc(sizeof(int));
    b = &a;
    free(b);
    return 0;
}

Would this result in a memory leak? If yes, why?

>>43
In C, the only thing you need to know is:
You need to cast void* only when you have to dereference it.
You don't dereference void*.
When you need to dereference void*, you assign the pointer to another pointer with the correct type instead of working on the casted void*.