strlcpy() returns the total length of the string they tried to create, so we should not use its return value without any check. scnprintf() returns the number of characters written into @buf not including the trailing '\0', so use it instead here. Signed-off-by: Changli Gao <xiaosuo@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>