Qn on buffer overflow

[unregistered]

#include <string.h>
#include <stdio.h>
 
void foo (char *bar)
{
   float My_Float = 10.5; // Addr = 0x0023FF4C
   char  c[12];           // Addr = 0x0023FF30
 
 
   // Will print 10.500000
   printf("My Float value = %f\n", My_Float);
 
    /* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
       Memory map:
       @ : c allocated memory
       # : My_Float allocated memory
       - : other memory
 
 
           *c                      *My_Float
       0x0023FF30                  0x0023FF4C
           |                           |
           @@@@@@@@@@@@----------------#####
      foo("my string is too long !!!!! XXXXX");
 
   memcpy will put 0x1010C042 in My_Float value.
   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
 
   memcpy(c, bar, strlen(bar));  // no bounds checking...
 
 
   // Will print 96.031372
   printf("My Float value = %f\n", My_Float);
}
 
int main (int argc, char **argv)
{
   foo("my string is too long !!!!! \x10\x10\xC0\x42");
   return 0;
}

took this from wikipedia, it says that "other memory" is stored between the char array c and the My_Float variable. What is this other memory and where did it come from?

[Caligulaminus]

They just made up an example to show their point.

where did it come from?

Taiwan? ;)

[unregistered]

huh?
assuming that its a 32bit computer, then shouldn't the float occupy 4bytes after the old value of ebp and then 12 bytes following the float with no space in between?