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Fix potential vulnerable cloned function #30

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Fix potential vulnerable cloned function #30

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19 changes: 19 additions & 0 deletions drivers/usb/serial/digi_acceleport.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1228,8 +1228,27 @@ static int digi_port_init(struct usb_serial_port *port, unsigned port_num)

static int digi_startup(struct usb_serial *serial)
{
struct device *dev = &serial->interface->dev;
struct digi_serial *serial_priv;
int ret;
int i;

/* check whether the device has the expected number of endpoints */
if (serial->num_port_pointers < serial->type->num_ports + 1) {
dev_err(dev, "OOB endpoints missing\n");
return -ENODEV;
}

for (i = 0; i < serial->type->num_ports + 1 ; i++) {
if (!serial->port[i]->read_urb) {
dev_err(dev, "bulk-in endpoint missing\n");
return -ENODEV;
}
if (!serial->port[i]->write_urb) {
dev_err(dev, "bulk-out endpoint missing\n");
return -ENODEV;
}
}

serial_priv = kzalloc(sizeof(*serial_priv), GFP_KERNEL);
if (!serial_priv)
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