On 11.06.24 16:35, Alan Stern wrote:
Greg, Oliver, or anyone else: Questions: If a broken or malicious device causes a USB class driver to add a thousand (or more) error messages per second to the kernel log, indefinitely, would that be considered a form of DOS?
Yes.
Should the driver be fixed?
If a broken device can do that, definitely.
What is an acceptable rate for an unending stream of error messages? Once a second? Once a minute?
Definitely not once a second. I'd be tempted to call a neverending stream an issue by itself. The approach the SCSI layer takes by giving up on a device if all else fails seems wise to me.
At what point should the driver give up and stop trying to communicate with the device?
I would propose after five cycles of all error handling. The exact number, as long as it is greater than 1 and a small integer does not really matter, as long as it exists. Regards Oliver
