How to avoid stdin input that does not fit in buffer be sent to the shell in Linux 64-bit Intel (x86-64) assembly

Question

Edit: Title changed, as @Gunner pointed out that this is not a buffer overflow.

In reading user input from stdin with NR_read

Answer 1

It is not a buffer overflow as others have stated. I wrote a tutorial on reading from the terminal in Linux which also shows how to deal with this issue. It uses Int 80, but you can easily change it to fit your needs.

http://www.dreamincode.net/forums/topic/286248-nasm-linux-terminal-inputoutput-wint-80h/