RE: [syzbot] WARNING in rtl8152_probe

[Hayes Wang]

Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
> Sent: Friday, May 14, 2021 11:33 PM
[...]
> The real motivation here, which nobody has mentioned explicitly yet, is
> that the driver needs to be careful enough that it won't crash no matter
> what bizarre, malfunctioning, or malicious device is attached.
> 
> Even if a device isn't malicious, if it is buggy, broken, or
> malfunctioning in some way then it can present input that a normal
> device would never generate.  If the driver isn't prepared to handle
> this unusual input, it may crash.  That is specifically what we want to
> avoid.
> 
> So if a peculiar emulated device created by syzbot is capable of
> crashing the driver, then somewhere there is a bug which needs to be
> fixed.  It's true that fixing all these bugs might not protect against a
> malicious device which deliberately behaves in an apparently reasonable
> manner.  But it does reduce the attack surface.

Thanks for your response.
I will add some checks.

Best Regards,
Hayes