Segmentation fault (core dumped) while printing the reversed linked list in C

I'm trying to reverse this linked-list but after giving input it gives output Segmentation fault (core dumped) while printing the list. This only happened when I declare 4th pointer before that it was working fine when there were only three pointers head, newcode, temp.

#include <stdio.h>
#include <stdlib.h>

int main()
    {
        struct node
        {
            int data;
            struct node *next;
        };

    struct node *head, *newnode, *temp;
    int choice = 1;

    // Creating a linked-list
    while (choice)
    {
        newnode = (struct node *)malloc(sizeof(struct node));
        printf("Enter the data: ");
        scanf("%d", &newnode->data);
        newnode->next = 0;
        if (head == 0)
        {
            head = temp = newnode;
        }
        else
        {
            temp->next = newnode;
            temp = newnode;
        }
        printf("Do you want to continue: ");
        scanf("%d", &choice);
    }
    temp = head;

    // Reversing the LL
    struct node *prevnode, *currentnode, *nextnode;
    prevnode = 0;
    currentnode = nextnode = head;
    while (nextnode != 0)
    {
        nextnode = nextnode->next;
        currentnode->next = prevnode;
        prevnode = currentnode;
        currentnode = nextnode;
    }
    head = prevnode;

    // Printing the Linked-list
    while (prevnode != 0)
    {
        printf("%d ", prevnode->data);
        prevnode = prevnode->next;
    }
    return 0;
}

I understand segmentation fault error still can't figure which part is actually causing the error.