getting weird Esception on freeing link list

[sanddune008]

Following is the source:

#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <ctype.h>


typedef struct
{
	int val;
	char *path;
	struct items *next;
}items;



items *head=NULL;

void insert(items *temp,int val,char *path)
{
	
//I am only trying to free this memory
char *pathval = malloc(strlen(path));
	items *prev = head;
	
	strcpy(pathval,path);

	temp = malloc(sizeof(items));

	if(temp == NULL)
	{
		assert(0);
		return;	
	}
	
	if(head == NULL)
	{
		temp->val = val;
		temp->next = NULL;
		temp->path = pathval;
		head = temp;		
	
	}
	else
	{
		while(prev->next != NULL)
			prev=prev->next;

		temp->val = val;
		temp->next = NULL;
		temp->path = pathval;
		prev->next = temp;		

	}

}


void Display(items *DispNd)
{

	if(DispNd == NULL)
		printf("Link List is empty!!!!\n");

	printf("Values in LinkList Nodes:\n");
	while(DispNd)
	{
		printf("%d\t",DispNd->val);
		printf("%s\t",DispNd->path);
		DispNd = DispNd->next;
	}
	
}

void vFree(items *temp)
{
	while(head)
	{
		temp=head->next;
		free(head->path);  //error 
		free(head);
		head=temp;
	}
}

int main()
{
	int i,len;
	char *path = "John is a good boy";
	
	printf("Enter the length of linked list:");
	scanf("%d",&len);

	for(i=0;i<len;i++)
	{
		insert(head,i,path);
	
	}

	Display(head);	
	vFree(head);
	//printf("Val of :");
	return 0;
}

Exception received:

DAMAGE:after Normal block

What is wrong in the above highlighted line I am only trying free memory allocated (highlighted in blue).

[GReaper]

The size of a string is "strlen(string) + 1".

[sanddune008]

The size of a string is "strlen(string) + 1".

Thanks.....