This is a simple C program but i am unable to decode it .

<------------ C PROGRAM STARTS HERE ------------>
#include <stdio.h>
#include <string.h>
void echo(char* input) {
char buf[16];
strcpy(buf, input);
printf("%s\n", buf);
}
int main(int argc, char **argv)
{
echo(argv[1]); // call the function to print the first 16 characters
return 0; // denote that the program has finished executing successfully
}
<------------ C PROGRAM ENDS HERE ------------->


the output of the above code is => segmentation fault:11
i want to know whether the above code is a victim of buffer overflow and if yes what is the exploit code and a basic explanation. thanx in advance