A large enough argument to the --port option could cause a string buffer
to be not NULL terminated because grub_strncpy() does not guarantee NULL
termination if copied string is longer than max characters to copy.
Fixes: 712309eaae04 (term/serial: Use grub_strncpy() instead of grub_snprintf() when only copying string)
Signed-off-by: Glenn Washburn <development@efficientek.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
f7a663c007