When "strlen(s) > MAX_ROOT_LEN", it has already said to use the default
value, but in fact, it still use the input value.
If happens, next sprintf() for 'fname' in simscsi_queuecommand_lck()
may be memory overflow.
Signed-off-by: Chen Gang <[email protected]>
Signed-off-by: Tony Luck <[email protected]>