mxuport_probe() reads version bytes at fixed offsets after request_firmware() succeeds. Firmware loading success does not prove that the blob reaches the highest version offset. Reject short firmware images before reading the version bytes. This is source-level parser hardening; no affected device or crash was observed. Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Pengpeng Hou <pengpeng@iscas.ac.cn> Fixes: ee467a1f2066 ("USB: serial: add Moxa UPORT 12XX/14XX/16XX driver") Signed-off-by: Johan Hovold <johan@kernel.org>