With the same code, code in the function make an error

typedef struct node
{
    int data;
    struct stack *next;
}NODE;

typedef NODE *STACK;
/*
... there are some code
*/
int main()
{
    STACK *st;
    STACK p = (STACK)malloc(sizeof(STACK));
    p->data = 8;
    if (empty(*st))
    {
        p->next = NULL;
        *st = p;
    }
    else
    {
         p->next = *st;
         *st = p;
    }
}

typedef struct node
{
    int data;
    struct stack *next;
}NODE;

typedef NODE *STACK;
/*
... there are some code
*/
void push(STACK *st, int value)
{
    STACK p = (STACK)malloc(sizeof(STACK));
    p->data = 8;
    if (empty(*st))
    {
        p->next = NULL;
        *st = p;
    }
    else
    {
         p->next = *st;
         *st = p;
    }
}
int main()
{
    STACK *st;
    push(st, 8);
    
}