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Fix potential vulnerability in a cloned function #214

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Fix potential vulnerability in a cloned function #214

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5 changes: 5 additions & 0 deletions drivers/usb/serial/visor.c
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Original file line number Diff line number Diff line change
Expand Up @@ -544,6 +544,11 @@ static int treo_attach(struct usb_serial *serial)
(serial->num_interrupt_in == 0))
return 0;

if (serial->num_bulk_in < 2 || serial->num_interrupt_in < 2) {
dev_err(&serial->interface->dev, "missing endpoints\n");
return -ENODEV;
}

/*
* It appears that Treos and Kyoceras want to use the
* 1st bulk in endpoint to communicate with the 2nd bulk out endpoint,
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