nft: arp: fix possible string overflow

This patch replaces strcat with strncat and strcpy with strncpy
fixing possible string overflow.

Based on the original patch:

http://patchwork.ozlabs.org/patch/279672/

from Jaromír Končický via Jiri Popelka.

Signed-off-by: Giuseppe Longo <giuseppelng@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2 files changed